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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/toml-0.5.11/src/de.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>de.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../toml/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../toml/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span>
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</pre><pre class="rust"><code><span class="doccomment">//! Deserializing TOML into Rust structures.
//!
//! This module contains all the Serde support for deserializing TOML documents
//! into Rust structures. Note that some top-level functions here are also
//! provided at the top of the crate.
</span><span class="kw">use </span>std::borrow::Cow;
<span class="kw">use </span>std::collections::HashMap;
<span class="kw">use </span>std::error;
<span class="kw">use </span>std::f64;
<span class="kw">use </span>std::fmt;
<span class="kw">use </span>std::iter;
<span class="kw">use </span>std::marker::PhantomData;
<span class="kw">use </span>std::str;
<span class="kw">use </span>std::vec;
<span class="kw">use </span>serde::de;
<span class="kw">use </span>serde::de::value::BorrowedStrDeserializer;
<span class="kw">use </span>serde::de::IntoDeserializer;
<span class="kw">use </span><span class="kw">crate</span>::datetime;
<span class="kw">use </span><span class="kw">crate</span>::spanned;
<span class="kw">use </span><span class="kw">crate</span>::tokens::{Error <span class="kw">as </span>TokenError, Span, Token, Tokenizer};
<span class="doccomment">/// Type Alias for a TOML Table pair
</span><span class="kw">type </span>TablePair&lt;<span class="lifetime">&#39;a</span>&gt; = ((Span, Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;), Value&lt;<span class="lifetime">&#39;a</span>&gt;);
<span class="doccomment">/// Deserializes a byte slice into a type.
///
/// This function will attempt to interpret `bytes` as UTF-8 data and then
/// deserialize `T` from the TOML document provided.
</span><span class="kw">pub fn </span>from_slice&lt;<span class="lifetime">&#39;de</span>, T&gt;(bytes: <span class="kw-2">&amp;</span><span class="lifetime">&#39;de </span>[u8]) -&gt; <span class="prelude-ty">Result</span>&lt;T, Error&gt;
<span class="kw">where
</span>T: de::Deserialize&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">match </span>str::from_utf8(bytes) {
<span class="prelude-val">Ok</span>(s) =&gt; from_str(s),
<span class="prelude-val">Err</span>(e) =&gt; <span class="prelude-val">Err</span>(Error::custom(<span class="prelude-val">None</span>, e.to_string())),
}
}
<span class="doccomment">/// Deserializes a string into a type.
///
/// This function will attempt to interpret `s` as a TOML document and
/// deserialize `T` from the document.
///
/// # Examples
///
/// ```
/// use serde_derive::Deserialize;
///
/// #[derive(Deserialize)]
/// struct Config {
/// title: String,
/// owner: Owner,
/// }
///
/// #[derive(Deserialize)]
/// struct Owner {
/// name: String,
/// }
///
/// let config: Config = toml::from_str(r#&quot;
/// title = &#39;TOML Example&#39;
///
/// [owner]
/// name = &#39;Lisa&#39;
/// &quot;#).unwrap();
///
/// assert_eq!(config.title, &quot;TOML Example&quot;);
/// assert_eq!(config.owner.name, &quot;Lisa&quot;);
/// ```
</span><span class="kw">pub fn </span>from_str&lt;<span class="lifetime">&#39;de</span>, T&gt;(s: <span class="kw-2">&amp;</span><span class="lifetime">&#39;de </span>str) -&gt; <span class="prelude-ty">Result</span>&lt;T, Error&gt;
<span class="kw">where
</span>T: de::Deserialize&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">let </span><span class="kw-2">mut </span>d = Deserializer::new(s);
<span class="kw">let </span>ret = T::deserialize(<span class="kw-2">&amp;mut </span>d)<span class="question-mark">?</span>;
d.end()<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(ret)
}
<span class="doccomment">/// Errors that can occur when deserializing a type.
</span><span class="attribute">#[derive(Debug, PartialEq, Eq, Clone)]
</span><span class="kw">pub struct </span>Error {
inner: Box&lt;ErrorInner&gt;,
}
<span class="attribute">#[derive(Debug, PartialEq, Eq, Clone)]
</span><span class="kw">struct </span>ErrorInner {
kind: ErrorKind,
line: <span class="prelude-ty">Option</span>&lt;usize&gt;,
col: usize,
at: <span class="prelude-ty">Option</span>&lt;usize&gt;,
message: String,
key: Vec&lt;String&gt;,
}
<span class="doccomment">/// Errors that can occur when deserializing a type.
</span><span class="attribute">#[derive(Debug, PartialEq, Eq, Clone)]
#[non_exhaustive]
</span><span class="kw">enum </span>ErrorKind {
<span class="doccomment">/// EOF was reached when looking for a value
</span>UnexpectedEof,
<span class="doccomment">/// An invalid character not allowed in a string was found
</span>InvalidCharInString(char),
<span class="doccomment">/// An invalid character was found as an escape
</span>InvalidEscape(char),
<span class="doccomment">/// An invalid character was found in a hex escape
</span>InvalidHexEscape(char),
<span class="doccomment">/// An invalid escape value was specified in a hex escape in a string.
///
/// Valid values are in the plane of unicode codepoints.
</span>InvalidEscapeValue(u32),
<span class="doccomment">/// A newline in a string was encountered when one was not allowed.
</span>NewlineInString,
<span class="doccomment">/// An unexpected character was encountered, typically when looking for a
/// value.
</span>Unexpected(char),
<span class="doccomment">/// An unterminated string was found where EOF was found before the ending
/// EOF mark.
</span>UnterminatedString,
<span class="doccomment">/// A newline was found in a table key.
</span>NewlineInTableKey,
<span class="doccomment">/// A number failed to parse
</span>NumberInvalid,
<span class="doccomment">/// A date or datetime was invalid
</span>DateInvalid,
<span class="doccomment">/// Wanted one sort of token, but found another.
</span>Wanted {
<span class="doccomment">/// Expected token type
</span>expected: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
<span class="doccomment">/// Actually found token type
</span>found: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
},
<span class="doccomment">/// A duplicate table definition was found.
</span>DuplicateTable(String),
<span class="doccomment">/// A previously defined table was redefined as an array.
</span>RedefineAsArray,
<span class="doccomment">/// An empty table key was found.
</span>EmptyTableKey,
<span class="doccomment">/// Multiline strings are not allowed for key
</span>MultilineStringKey,
<span class="doccomment">/// A custom error which could be generated when deserializing a particular
/// type.
</span>Custom,
<span class="doccomment">/// A tuple with a certain number of elements was expected but something
/// else was found.
</span>ExpectedTuple(usize),
<span class="doccomment">/// Expected table keys to be in increasing tuple index order, but something
/// else was found.
</span>ExpectedTupleIndex {
<span class="doccomment">/// Expected index.
</span>expected: usize,
<span class="doccomment">/// Key that was specified.
</span>found: String,
},
<span class="doccomment">/// An empty table was expected but entries were found
</span>ExpectedEmptyTable,
<span class="doccomment">/// Dotted key attempted to extend something that is not a table.
</span>DottedKeyInvalidType,
<span class="doccomment">/// An unexpected key was encountered.
///
/// Used when deserializing a struct with a limited set of fields.
</span>UnexpectedKeys {
<span class="doccomment">/// The unexpected keys.
</span>keys: Vec&lt;String&gt;,
<span class="doccomment">/// Keys that may be specified.
</span>available: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>[<span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str],
},
<span class="doccomment">/// Unquoted string was found when quoted one was expected
</span>UnquotedString,
}
<span class="doccomment">/// Deserialization implementation for TOML.
</span><span class="kw">pub struct </span>Deserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
require_newline_after_table: bool,
allow_duplciate_after_longer_table: bool,
input: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str,
tokens: Tokenizer&lt;<span class="lifetime">&#39;a</span>&gt;,
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; de::Deserializer&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span><span class="kw-2">&amp;</span><span class="lifetime">&#39;b </span><span class="kw-2">mut </span>Deserializer&lt;<span class="lifetime">&#39;de</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>deserialize_any&lt;V&gt;(<span class="self">self</span>, visitor: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">let </span><span class="kw-2">mut </span>tables = <span class="self">self</span>.tables()<span class="question-mark">?</span>;
<span class="kw">let </span>table_indices = build_table_indices(<span class="kw-2">&amp;</span>tables);
<span class="kw">let </span>table_pindices = build_table_pindices(<span class="kw-2">&amp;</span>tables);
<span class="kw">let </span>res = visitor.visit_map(MapVisitor {
values: Vec::new().into_iter().peekable(),
next_value: <span class="prelude-val">None</span>,
depth: <span class="number">0</span>,
cur: <span class="number">0</span>,
cur_parent: <span class="number">0</span>,
max: tables.len(),
table_indices: <span class="kw-2">&amp;</span>table_indices,
table_pindices: <span class="kw-2">&amp;</span>table_pindices,
tables: <span class="kw-2">&amp;mut </span>tables,
array: <span class="bool-val">false</span>,
de: <span class="self">self</span>,
});
res.map_err(|<span class="kw-2">mut </span>err| {
<span class="comment">// Errors originating from this library (toml), have an offset
// attached to them already. Other errors, like those originating
// from serde (like &quot;missing field&quot;) or from a custom deserializer,
// do not have offsets on them. Here, we do a best guess at their
// location, by attributing them to the &quot;current table&quot; (the last
// item in `tables`).
</span>err.fix_offset(|| tables.last().map(|table| table.at));
err.fix_linecol(|at| <span class="self">self</span>.to_linecol(at));
err
})
}
<span class="comment">// Called when the type to deserialize is an enum, as opposed to a field in the type.
</span><span class="kw">fn </span>deserialize_enum&lt;V&gt;(
<span class="self">self</span>,
_name: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
_variants: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>[<span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str],
visitor: V,
) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">let </span>(value, name) = <span class="self">self</span>.string_or_table()<span class="question-mark">?</span>;
<span class="kw">match </span>value.e {
E::String(val) =&gt; visitor.visit_enum(val.into_deserializer()),
E::InlineTable(values) =&gt; {
<span class="kw">if </span>values.len() != <span class="number">1 </span>{
<span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(value.start),
ErrorKind::Wanted {
expected: <span class="string">&quot;exactly 1 element&quot;</span>,
found: <span class="kw">if </span>values.is_empty() {
<span class="string">&quot;zero elements&quot;
</span>} <span class="kw">else </span>{
<span class="string">&quot;more than 1 element&quot;
</span>},
},
))
} <span class="kw">else </span>{
visitor.visit_enum(InlineTableDeserializer {
values: values.into_iter(),
next_value: <span class="prelude-val">None</span>,
})
}
}
E::DottedTable(<span class="kw">_</span>) =&gt; visitor.visit_enum(DottedTableDeserializer {
name: name.expect(<span class="string">&quot;Expected table header to be passed.&quot;</span>),
value,
}),
e =&gt; <span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(value.start),
ErrorKind::Wanted {
expected: <span class="string">&quot;string or table&quot;</span>,
found: e.type_name(),
},
)),
}
}
<span class="kw">fn </span>deserialize_struct&lt;V&gt;(
<span class="self">self</span>,
name: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
fields: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>[<span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str],
visitor: V,
) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if </span>name == spanned::NAME &amp;&amp; fields == [spanned::START, spanned::END, spanned::VALUE] {
<span class="kw">let </span>start = <span class="number">0</span>;
<span class="kw">let </span>end = <span class="self">self</span>.input.len();
<span class="kw">let </span>res = visitor.visit_map(SpannedDeserializer {
phantom_data: PhantomData,
start: <span class="prelude-val">Some</span>(start),
value: <span class="prelude-val">Some</span>(<span class="self">self</span>),
end: <span class="prelude-val">Some</span>(end),
});
<span class="kw">return </span>res;
}
<span class="self">self</span>.deserialize_any(visitor)
}
<span class="macro">serde::forward_to_deserialize_any! </span>{
bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
bytes byte_buf map unit newtype_struct
ignored_any unit_struct tuple_struct tuple option identifier
}
}
<span class="comment">// Builds a datastructure that allows for efficient sublinear lookups.
// The returned HashMap contains a mapping from table header (like [a.b.c])
// to list of tables with that precise name. The tables are being identified
// by their index in the passed slice. We use a list as the implementation
// uses this data structure for arrays as well as tables,
// so if any top level [[name]] array contains multiple entries,
// there are multiple entries in the list.
// The lookup is performed in the `SeqAccess` implementation of `MapVisitor`.
// The lists are ordered, which we exploit in the search code by using
// bisection.
</span><span class="kw">fn </span>build_table_indices&lt;<span class="lifetime">&#39;de</span>&gt;(tables: <span class="kw-2">&amp;</span>[Table&lt;<span class="lifetime">&#39;de</span>&gt;]) -&gt; HashMap&lt;Vec&lt;Cow&lt;<span class="lifetime">&#39;de</span>, str&gt;&gt;, Vec&lt;usize&gt;&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>res = HashMap::new();
<span class="kw">for </span>(i, table) <span class="kw">in </span>tables.iter().enumerate() {
<span class="kw">let </span>header = table.header.iter().map(|v| v.<span class="number">1</span>.clone()).collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;();
res.entry(header).or_insert_with(Vec::new).push(i);
}
res
}
<span class="comment">// Builds a datastructure that allows for efficient sublinear lookups.
// The returned HashMap contains a mapping from table header (like [a.b.c])
// to list of tables whose name at least starts with the specified
// name. So searching for [a.b] would give both [a.b.c.d] as well as [a.b.e].
// The tables are being identified by their index in the passed slice.
//
// A list is used for two reasons: First, the implementation also
// stores arrays in the same data structure and any top level array
// of size 2 or greater creates multiple entries in the list with the
// same shared name. Second, there can be multiple tables sharing
// the same prefix.
//
// The lookup is performed in the `MapAccess` implementation of `MapVisitor`.
// The lists are ordered, which we exploit in the search code by using
// bisection.
</span><span class="kw">fn </span>build_table_pindices&lt;<span class="lifetime">&#39;de</span>&gt;(tables: <span class="kw-2">&amp;</span>[Table&lt;<span class="lifetime">&#39;de</span>&gt;]) -&gt; HashMap&lt;Vec&lt;Cow&lt;<span class="lifetime">&#39;de</span>, str&gt;&gt;, Vec&lt;usize&gt;&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>res = HashMap::new();
<span class="kw">for </span>(i, table) <span class="kw">in </span>tables.iter().enumerate() {
<span class="kw">let </span>header = table.header.iter().map(|v| v.<span class="number">1</span>.clone()).collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;();
<span class="kw">for </span>len <span class="kw">in </span><span class="number">0</span>..=header.len() {
res.entry(header[..len].to_owned())
.or_insert_with(Vec::new)
.push(i);
}
}
res
}
<span class="kw">fn </span>headers_equal&lt;<span class="lifetime">&#39;a</span>, <span class="lifetime">&#39;b</span>&gt;(hdr_a: <span class="kw-2">&amp;</span>[(Span, Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;)], hdr_b: <span class="kw-2">&amp;</span>[(Span, Cow&lt;<span class="lifetime">&#39;b</span>, str&gt;)]) -&gt; bool {
<span class="kw">if </span>hdr_a.len() != hdr_b.len() {
<span class="kw">return </span><span class="bool-val">false</span>;
}
hdr_a.iter().zip(hdr_b.iter()).all(|(h1, h2)| h1.<span class="number">1 </span>== h2.<span class="number">1</span>)
}
<span class="kw">struct </span>Table&lt;<span class="lifetime">&#39;a</span>&gt; {
at: usize,
header: Vec&lt;(Span, Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;)&gt;,
values: <span class="prelude-ty">Option</span>&lt;Vec&lt;TablePair&lt;<span class="lifetime">&#39;a</span>&gt;&gt;&gt;,
array: bool,
}
<span class="kw">struct </span>MapVisitor&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; {
values: iter::Peekable&lt;vec::IntoIter&lt;TablePair&lt;<span class="lifetime">&#39;de</span>&gt;&gt;&gt;,
next_value: <span class="prelude-ty">Option</span>&lt;TablePair&lt;<span class="lifetime">&#39;de</span>&gt;&gt;,
depth: usize,
cur: usize,
cur_parent: usize,
max: usize,
table_indices: <span class="kw-2">&amp;</span><span class="lifetime">&#39;b </span>HashMap&lt;Vec&lt;Cow&lt;<span class="lifetime">&#39;de</span>, str&gt;&gt;, Vec&lt;usize&gt;&gt;,
table_pindices: <span class="kw-2">&amp;</span><span class="lifetime">&#39;b </span>HashMap&lt;Vec&lt;Cow&lt;<span class="lifetime">&#39;de</span>, str&gt;&gt;, Vec&lt;usize&gt;&gt;,
tables: <span class="kw-2">&amp;</span><span class="lifetime">&#39;b </span><span class="kw-2">mut </span>[Table&lt;<span class="lifetime">&#39;de</span>&gt;],
array: bool,
de: <span class="kw-2">&amp;</span><span class="lifetime">&#39;b </span><span class="kw-2">mut </span>Deserializer&lt;<span class="lifetime">&#39;de</span>&gt;,
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; de::MapAccess&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>MapVisitor&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>next_key_seed&lt;K&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, seed: K) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;K::Value&gt;, Error&gt;
<span class="kw">where
</span>K: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if </span><span class="self">self</span>.cur_parent == <span class="self">self</span>.max || <span class="self">self</span>.cur == <span class="self">self</span>.max {
<span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>);
}
<span class="kw">loop </span>{
<span class="macro">assert!</span>(<span class="self">self</span>.next_value.is_none());
<span class="kw">if let </span><span class="prelude-val">Some</span>((key, value)) = <span class="self">self</span>.values.next() {
<span class="kw">let </span>ret = seed.deserialize(StrDeserializer::spanned(key.clone()))<span class="question-mark">?</span>;
<span class="self">self</span>.next_value = <span class="prelude-val">Some</span>((key, value));
<span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(ret));
}
<span class="kw">let </span>next_table = {
<span class="kw">let </span>prefix_stripped = <span class="self">self</span>.tables[<span class="self">self</span>.cur_parent].header[..<span class="self">self</span>.depth]
.iter()
.map(|v| v.<span class="number">1</span>.clone())
.collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;();
<span class="self">self</span>.table_pindices
.get(<span class="kw-2">&amp;</span>prefix_stripped)
.and_then(|entries| {
<span class="kw">let </span>start = entries.binary_search(<span class="kw-2">&amp;</span><span class="self">self</span>.cur).unwrap_or_else(|v| v);
<span class="kw">if </span>start == entries.len() || entries[start] &lt; <span class="self">self</span>.cur {
<span class="kw">return </span><span class="prelude-val">None</span>;
}
entries[start..]
.iter()
.filter_map(|i| <span class="kw">if </span><span class="kw-2">*</span>i &lt; <span class="self">self</span>.max { <span class="prelude-val">Some</span>(<span class="kw-2">*</span>i) } <span class="kw">else </span>{ <span class="prelude-val">None </span>})
.map(|i| (i, <span class="kw-2">&amp;</span><span class="self">self</span>.tables[i]))
.find(|(<span class="kw">_</span>, table)| table.values.is_some())
.map(|p| p.<span class="number">0</span>)
})
};
<span class="kw">let </span>pos = <span class="kw">match </span>next_table {
<span class="prelude-val">Some</span>(pos) =&gt; pos,
<span class="prelude-val">None </span>=&gt; <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>),
};
<span class="self">self</span>.cur = pos;
<span class="comment">// Test to see if we&#39;re duplicating our parent&#39;s table, and if so
// then this is an error in the toml format
</span><span class="kw">if </span><span class="self">self</span>.cur_parent != pos {
<span class="kw">if </span>headers_equal(
<span class="kw-2">&amp;</span><span class="self">self</span>.tables[<span class="self">self</span>.cur_parent].header,
<span class="kw-2">&amp;</span><span class="self">self</span>.tables[pos].header,
) {
<span class="kw">let </span>at = <span class="self">self</span>.tables[pos].at;
<span class="kw">let </span>name = <span class="self">self</span>.tables[pos]
.header
.iter()
.map(|k| k.<span class="number">1</span>.to_owned())
.collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;()
.join(<span class="string">&quot;.&quot;</span>);
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.de.error(at, ErrorKind::DuplicateTable(name)));
}
<span class="comment">// If we&#39;re here we know we should share the same prefix, and if
// the longer table was defined first then we want to narrow
// down our parent&#39;s length if possible to ensure that we catch
// duplicate tables defined afterwards.
</span><span class="kw">if </span>!<span class="self">self</span>.de.allow_duplciate_after_longer_table {
<span class="kw">let </span>parent_len = <span class="self">self</span>.tables[<span class="self">self</span>.cur_parent].header.len();
<span class="kw">let </span>cur_len = <span class="self">self</span>.tables[pos].header.len();
<span class="kw">if </span>cur_len &lt; parent_len {
<span class="self">self</span>.cur_parent = pos;
}
}
}
<span class="kw">let </span>table = <span class="kw-2">&amp;mut </span><span class="self">self</span>.tables[pos];
<span class="comment">// If we&#39;re not yet at the appropriate depth for this table then we
// just next the next portion of its header and then continue
// decoding.
</span><span class="kw">if </span><span class="self">self</span>.depth != table.header.len() {
<span class="kw">let </span>key = <span class="kw-2">&amp;</span>table.header[<span class="self">self</span>.depth];
<span class="kw">let </span>key = seed.deserialize(StrDeserializer::spanned(key.clone()))<span class="question-mark">?</span>;
<span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(key));
}
<span class="comment">// Rule out cases like:
//
// [[foo.bar]]
// [[foo]]
</span><span class="kw">if </span>table.array {
<span class="kw">let </span>kind = ErrorKind::RedefineAsArray;
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.de.error(table.at, kind));
}
<span class="self">self</span>.values = table
.values
.take()
.expect(<span class="string">&quot;Unable to read table values&quot;</span>)
.into_iter()
.peekable();
}
}
<span class="kw">fn </span>next_value_seed&lt;V&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, seed: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if let </span><span class="prelude-val">Some</span>((k, v)) = <span class="self">self</span>.next_value.take() {
<span class="kw">match </span>seed.deserialize(ValueDeserializer::new(v)) {
<span class="prelude-val">Ok</span>(v) =&gt; <span class="kw">return </span><span class="prelude-val">Ok</span>(v),
<span class="prelude-val">Err</span>(<span class="kw-2">mut </span>e) =&gt; {
e.add_key_context(<span class="kw-2">&amp;</span>k.<span class="number">1</span>);
<span class="kw">return </span><span class="prelude-val">Err</span>(e);
}
}
}
<span class="kw">let </span>array =
<span class="self">self</span>.tables[<span class="self">self</span>.cur].array &amp;&amp; <span class="self">self</span>.depth == <span class="self">self</span>.tables[<span class="self">self</span>.cur].header.len() - <span class="number">1</span>;
<span class="self">self</span>.cur += <span class="number">1</span>;
<span class="kw">let </span>res = seed.deserialize(MapVisitor {
values: Vec::new().into_iter().peekable(),
next_value: <span class="prelude-val">None</span>,
depth: <span class="self">self</span>.depth + <span class="kw">if </span>array { <span class="number">0 </span>} <span class="kw">else </span>{ <span class="number">1 </span>},
cur_parent: <span class="self">self</span>.cur - <span class="number">1</span>,
cur: <span class="number">0</span>,
max: <span class="self">self</span>.max,
array,
table_indices: <span class="self">self</span>.table_indices,
table_pindices: <span class="self">self</span>.table_pindices,
tables: <span class="kw-2">&amp;mut *</span><span class="self">self</span>.tables,
de: <span class="kw-2">&amp;mut *</span><span class="self">self</span>.de,
});
res.map_err(|<span class="kw-2">mut </span>e| {
e.add_key_context(<span class="kw-2">&amp;</span><span class="self">self</span>.tables[<span class="self">self</span>.cur - <span class="number">1</span>].header[<span class="self">self</span>.depth].<span class="number">1</span>);
e
})
}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; de::SeqAccess&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>MapVisitor&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>next_element_seed&lt;K&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, seed: K) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;K::Value&gt;, Error&gt;
<span class="kw">where
</span>K: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="macro">assert!</span>(<span class="self">self</span>.next_value.is_none());
<span class="macro">assert!</span>(<span class="self">self</span>.values.next().is_none());
<span class="kw">if </span><span class="self">self</span>.cur_parent == <span class="self">self</span>.max {
<span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>);
}
<span class="kw">let </span>header_stripped = <span class="self">self</span>.tables[<span class="self">self</span>.cur_parent]
.header
.iter()
.map(|v| v.<span class="number">1</span>.clone())
.collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;();
<span class="kw">let </span>start_idx = <span class="self">self</span>.cur_parent + <span class="number">1</span>;
<span class="kw">let </span>next = <span class="self">self
</span>.table_indices
.get(<span class="kw-2">&amp;</span>header_stripped)
.and_then(|entries| {
<span class="kw">let </span>start = entries.binary_search(<span class="kw-2">&amp;</span>start_idx).unwrap_or_else(|v| v);
<span class="kw">if </span>start == entries.len() || entries[start] &lt; start_idx {
<span class="kw">return </span><span class="prelude-val">None</span>;
}
entries[start..]
.iter()
.filter_map(|i| <span class="kw">if </span><span class="kw-2">*</span>i &lt; <span class="self">self</span>.max { <span class="prelude-val">Some</span>(<span class="kw-2">*</span>i) } <span class="kw">else </span>{ <span class="prelude-val">None </span>})
.map(|i| (i, <span class="kw-2">&amp;</span><span class="self">self</span>.tables[i]))
.find(|(<span class="kw">_</span>, table)| table.array)
.map(|p| p.<span class="number">0</span>)
})
.unwrap_or(<span class="self">self</span>.max);
<span class="kw">let </span>ret = seed.deserialize(MapVisitor {
values: <span class="self">self</span>.tables[<span class="self">self</span>.cur_parent]
.values
.take()
.expect(<span class="string">&quot;Unable to read table values&quot;</span>)
.into_iter()
.peekable(),
next_value: <span class="prelude-val">None</span>,
depth: <span class="self">self</span>.depth + <span class="number">1</span>,
cur_parent: <span class="self">self</span>.cur_parent,
max: next,
cur: <span class="number">0</span>,
array: <span class="bool-val">false</span>,
table_indices: <span class="self">self</span>.table_indices,
table_pindices: <span class="self">self</span>.table_pindices,
tables: <span class="self">self</span>.tables,
de: <span class="self">self</span>.de,
})<span class="question-mark">?</span>;
<span class="self">self</span>.cur_parent = next;
<span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(ret))
}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; de::Deserializer&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>MapVisitor&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>deserialize_any&lt;V&gt;(<span class="self">self</span>, visitor: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if </span><span class="self">self</span>.array {
visitor.visit_seq(<span class="self">self</span>)
} <span class="kw">else </span>{
visitor.visit_map(<span class="self">self</span>)
}
}
<span class="comment">// `None` is interpreted as a missing field so be sure to implement `Some`
// as a present field.
</span><span class="kw">fn </span>deserialize_option&lt;V&gt;(<span class="self">self</span>, visitor: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
visitor.visit_some(<span class="self">self</span>)
}
<span class="kw">fn </span>deserialize_newtype_struct&lt;V&gt;(
<span class="self">self</span>,
_name: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
visitor: V,
) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
visitor.visit_newtype_struct(<span class="self">self</span>)
}
<span class="kw">fn </span>deserialize_struct&lt;V&gt;(
<span class="kw-2">mut </span><span class="self">self</span>,
name: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
fields: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>[<span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str],
visitor: V,
) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if </span>name == spanned::NAME
&amp;&amp; fields == [spanned::START, spanned::END, spanned::VALUE]
&amp;&amp; !(<span class="self">self</span>.array &amp;&amp; <span class="self">self</span>.values.peek().is_some())
{
<span class="comment">// TODO we can&#39;t actually emit spans here for the *entire* table/array
// due to the format that toml uses. Setting the start and end to 0 is
// *detectable* (and no reasonable span would look like that),
// it would be better to expose this in the API via proper
// ADTs like Option&lt;T&gt;.
</span><span class="kw">let </span>start = <span class="number">0</span>;
<span class="kw">let </span>end = <span class="number">0</span>;
<span class="kw">let </span>res = visitor.visit_map(SpannedDeserializer {
phantom_data: PhantomData,
start: <span class="prelude-val">Some</span>(start),
value: <span class="prelude-val">Some</span>(<span class="self">self</span>),
end: <span class="prelude-val">Some</span>(end),
});
<span class="kw">return </span>res;
}
<span class="self">self</span>.deserialize_any(visitor)
}
<span class="kw">fn </span>deserialize_enum&lt;V&gt;(
<span class="self">self</span>,
_name: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
_variants: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>[<span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str],
visitor: V,
) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if </span><span class="self">self</span>.tables.len() != <span class="number">1 </span>{
<span class="kw">return </span><span class="prelude-val">Err</span>(Error::custom(
<span class="prelude-val">Some</span>(<span class="self">self</span>.cur),
<span class="string">&quot;enum table must contain exactly one table&quot;</span>.into(),
));
}
<span class="kw">let </span>table = <span class="kw-2">&amp;mut </span><span class="self">self</span>.tables[<span class="number">0</span>];
<span class="kw">let </span>values = table.values.take().expect(<span class="string">&quot;table has no values?&quot;</span>);
<span class="kw">if </span>table.header.is_empty() {
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.de.error(<span class="self">self</span>.cur, ErrorKind::EmptyTableKey));
}
<span class="kw">let </span>name = table.header[table.header.len() - <span class="number">1</span>].<span class="number">1</span>.to_owned();
visitor.visit_enum(DottedTableDeserializer {
name,
value: Value {
e: E::DottedTable(values),
start: <span class="number">0</span>,
end: <span class="number">0</span>,
},
})
}
<span class="macro">serde::forward_to_deserialize_any! </span>{
bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
bytes byte_buf map unit identifier
ignored_any unit_struct tuple_struct tuple
}
}
<span class="kw">struct </span>StrDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
span: <span class="prelude-ty">Option</span>&lt;Span&gt;,
key: Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;,
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; StrDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
<span class="kw">fn </span>spanned(inner: (Span, Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;)) -&gt; StrDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
StrDeserializer {
span: <span class="prelude-val">Some</span>(inner.<span class="number">0</span>),
key: inner.<span class="number">1</span>,
}
}
<span class="kw">fn </span>new(key: Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;) -&gt; StrDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
StrDeserializer { span: <span class="prelude-val">None</span>, key }
}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; de::IntoDeserializer&lt;<span class="lifetime">&#39;a</span>, Error&gt; <span class="kw">for </span>StrDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
<span class="kw">type </span>Deserializer = <span class="self">Self</span>;
<span class="kw">fn </span>into_deserializer(<span class="self">self</span>) -&gt; <span class="self">Self</span>::Deserializer {
<span class="self">self
</span>}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::Deserializer&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>StrDeserializer&lt;<span class="lifetime">&#39;de</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>deserialize_any&lt;V&gt;(<span class="self">self</span>, visitor: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">match </span><span class="self">self</span>.key {
Cow::Borrowed(s) =&gt; visitor.visit_borrowed_str(s),
Cow::Owned(s) =&gt; visitor.visit_string(s),
}
}
<span class="kw">fn </span>deserialize_struct&lt;V&gt;(
<span class="self">self</span>,
name: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
fields: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>[<span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str],
visitor: V,
) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if </span>name == spanned::NAME &amp;&amp; fields == [spanned::START, spanned::END, spanned::VALUE] {
<span class="kw">if let </span><span class="prelude-val">Some</span>(span) = <span class="self">self</span>.span {
<span class="kw">return </span>visitor.visit_map(SpannedDeserializer {
phantom_data: PhantomData,
start: <span class="prelude-val">Some</span>(span.start),
value: <span class="prelude-val">Some</span>(StrDeserializer::new(<span class="self">self</span>.key)),
end: <span class="prelude-val">Some</span>(span.end),
});
}
}
<span class="self">self</span>.deserialize_any(visitor)
}
<span class="macro">serde::forward_to_deserialize_any! </span>{
bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
bytes byte_buf map option unit newtype_struct
ignored_any unit_struct tuple_struct tuple <span class="kw">enum </span>identifier
}
}
<span class="kw">struct </span>ValueDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
value: Value&lt;<span class="lifetime">&#39;a</span>&gt;,
validate_struct_keys: bool,
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; ValueDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
<span class="kw">fn </span>new(value: Value&lt;<span class="lifetime">&#39;a</span>&gt;) -&gt; ValueDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
ValueDeserializer {
value,
validate_struct_keys: <span class="bool-val">false</span>,
}
}
<span class="kw">fn </span>with_struct_key_validation(<span class="kw-2">mut </span><span class="self">self</span>) -&gt; <span class="self">Self </span>{
<span class="self">self</span>.validate_struct_keys = <span class="bool-val">true</span>;
<span class="self">self
</span>}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::Deserializer&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>ValueDeserializer&lt;<span class="lifetime">&#39;de</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>deserialize_any&lt;V&gt;(<span class="self">self</span>, visitor: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">let </span>start = <span class="self">self</span>.value.start;
<span class="kw">let </span>res = <span class="kw">match </span><span class="self">self</span>.value.e {
E::Integer(i) =&gt; visitor.visit_i64(i),
E::Boolean(b) =&gt; visitor.visit_bool(b),
E::Float(f) =&gt; visitor.visit_f64(f),
E::String(Cow::Borrowed(s)) =&gt; visitor.visit_borrowed_str(s),
E::String(Cow::Owned(s)) =&gt; visitor.visit_string(s),
E::Datetime(s) =&gt; visitor.visit_map(DatetimeDeserializer {
date: s,
visited: <span class="bool-val">false</span>,
}),
E::Array(values) =&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>s = de::value::SeqDeserializer::new(values.into_iter());
<span class="kw">let </span>ret = visitor.visit_seq(<span class="kw-2">&amp;mut </span>s)<span class="question-mark">?</span>;
s.end()<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(ret)
}
E::InlineTable(values) | E::DottedTable(values) =&gt; {
visitor.visit_map(InlineTableDeserializer {
values: values.into_iter(),
next_value: <span class="prelude-val">None</span>,
})
}
};
res.map_err(|<span class="kw-2">mut </span>err| {
<span class="comment">// Attribute the error to whatever value returned the error.
</span>err.fix_offset(|| <span class="prelude-val">Some</span>(start));
err
})
}
<span class="kw">fn </span>deserialize_struct&lt;V&gt;(
<span class="self">self</span>,
name: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
fields: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>[<span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str],
visitor: V,
) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if </span>name == datetime::NAME &amp;&amp; fields == [datetime::FIELD] {
<span class="kw">if let </span>E::Datetime(s) = <span class="self">self</span>.value.e {
<span class="kw">return </span>visitor.visit_map(DatetimeDeserializer {
date: s,
visited: <span class="bool-val">false</span>,
});
}
}
<span class="kw">if </span><span class="self">self</span>.validate_struct_keys {
<span class="kw">match </span><span class="self">self</span>.value.e {
E::InlineTable(<span class="kw-2">ref </span>values) | E::DottedTable(<span class="kw-2">ref </span>values) =&gt; {
<span class="kw">let </span>extra_fields = values
.iter()
.filter_map(|key_value| {
<span class="kw">let </span>(<span class="kw-2">ref </span>key, <span class="kw-2">ref </span>_val) = <span class="kw-2">*</span>key_value;
<span class="kw">if </span>!fields.contains(&amp;&amp;<span class="kw-2">*</span>(key.<span class="number">1</span>)) {
<span class="prelude-val">Some</span>(key.clone())
} <span class="kw">else </span>{
<span class="prelude-val">None
</span>}
})
.collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;();
<span class="kw">if </span>!extra_fields.is_empty() {
<span class="kw">return </span><span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(<span class="self">self</span>.value.start),
ErrorKind::UnexpectedKeys {
keys: extra_fields
.iter()
.map(|k| k.<span class="number">1</span>.to_string())
.collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;(),
available: fields,
},
));
}
}
<span class="kw">_ </span>=&gt; {}
}
}
<span class="kw">if </span>name == spanned::NAME &amp;&amp; fields == [spanned::START, spanned::END, spanned::VALUE] {
<span class="kw">let </span>start = <span class="self">self</span>.value.start;
<span class="kw">let </span>end = <span class="self">self</span>.value.end;
<span class="kw">return </span>visitor.visit_map(SpannedDeserializer {
phantom_data: PhantomData,
start: <span class="prelude-val">Some</span>(start),
value: <span class="prelude-val">Some</span>(<span class="self">self</span>.value),
end: <span class="prelude-val">Some</span>(end),
});
}
<span class="self">self</span>.deserialize_any(visitor)
}
<span class="comment">// `None` is interpreted as a missing field so be sure to implement `Some`
// as a present field.
</span><span class="kw">fn </span>deserialize_option&lt;V&gt;(<span class="self">self</span>, visitor: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
visitor.visit_some(<span class="self">self</span>)
}
<span class="kw">fn </span>deserialize_enum&lt;V&gt;(
<span class="self">self</span>,
_name: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
_variants: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>[<span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str],
visitor: V,
) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">match </span><span class="self">self</span>.value.e {
E::String(val) =&gt; visitor.visit_enum(val.into_deserializer()),
E::InlineTable(values) =&gt; {
<span class="kw">if </span>values.len() != <span class="number">1 </span>{
<span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(<span class="self">self</span>.value.start),
ErrorKind::Wanted {
expected: <span class="string">&quot;exactly 1 element&quot;</span>,
found: <span class="kw">if </span>values.is_empty() {
<span class="string">&quot;zero elements&quot;
</span>} <span class="kw">else </span>{
<span class="string">&quot;more than 1 element&quot;
</span>},
},
))
} <span class="kw">else </span>{
visitor.visit_enum(InlineTableDeserializer {
values: values.into_iter(),
next_value: <span class="prelude-val">None</span>,
})
}
}
e =&gt; <span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(<span class="self">self</span>.value.start),
ErrorKind::Wanted {
expected: <span class="string">&quot;string or inline table&quot;</span>,
found: e.type_name(),
},
)),
}
}
<span class="kw">fn </span>deserialize_newtype_struct&lt;V&gt;(
<span class="self">self</span>,
_name: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str,
visitor: V,
) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
visitor.visit_newtype_struct(<span class="self">self</span>)
}
<span class="macro">serde::forward_to_deserialize_any! </span>{
bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
bytes byte_buf map unit identifier
ignored_any unit_struct tuple_struct tuple
}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; de::IntoDeserializer&lt;<span class="lifetime">&#39;de</span>, Error&gt; <span class="kw">for </span>MapVisitor&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; {
<span class="kw">type </span>Deserializer = MapVisitor&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt;;
<span class="kw">fn </span>into_deserializer(<span class="self">self</span>) -&gt; <span class="self">Self</span>::Deserializer {
<span class="self">self
</span>}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>, <span class="lifetime">&#39;b</span>&gt; de::IntoDeserializer&lt;<span class="lifetime">&#39;de</span>, Error&gt; <span class="kw">for </span><span class="kw-2">&amp;</span><span class="lifetime">&#39;b </span><span class="kw-2">mut </span>Deserializer&lt;<span class="lifetime">&#39;de</span>&gt; {
<span class="kw">type </span>Deserializer = <span class="self">Self</span>;
<span class="kw">fn </span>into_deserializer(<span class="self">self</span>) -&gt; <span class="self">Self</span>::Deserializer {
<span class="self">self
</span>}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::IntoDeserializer&lt;<span class="lifetime">&#39;de</span>, Error&gt; <span class="kw">for </span>Value&lt;<span class="lifetime">&#39;de</span>&gt; {
<span class="kw">type </span>Deserializer = ValueDeserializer&lt;<span class="lifetime">&#39;de</span>&gt;;
<span class="kw">fn </span>into_deserializer(<span class="self">self</span>) -&gt; <span class="self">Self</span>::Deserializer {
ValueDeserializer::new(<span class="self">self</span>)
}
}
<span class="kw">struct </span>SpannedDeserializer&lt;<span class="lifetime">&#39;de</span>, T: de::IntoDeserializer&lt;<span class="lifetime">&#39;de</span>, Error&gt;&gt; {
phantom_data: PhantomData&lt;<span class="kw-2">&amp;</span><span class="lifetime">&#39;de </span>()&gt;,
start: <span class="prelude-ty">Option</span>&lt;usize&gt;,
end: <span class="prelude-ty">Option</span>&lt;usize&gt;,
value: <span class="prelude-ty">Option</span>&lt;T&gt;,
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>, T&gt; de::MapAccess&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>SpannedDeserializer&lt;<span class="lifetime">&#39;de</span>, T&gt;
<span class="kw">where
</span>T: de::IntoDeserializer&lt;<span class="lifetime">&#39;de</span>, Error&gt;,
{
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>next_key_seed&lt;K&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, seed: K) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;K::Value&gt;, Error&gt;
<span class="kw">where
</span>K: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if </span><span class="self">self</span>.start.is_some() {
seed.deserialize(BorrowedStrDeserializer::new(spanned::START))
.map(<span class="prelude-val">Some</span>)
} <span class="kw">else if </span><span class="self">self</span>.end.is_some() {
seed.deserialize(BorrowedStrDeserializer::new(spanned::END))
.map(<span class="prelude-val">Some</span>)
} <span class="kw">else if </span><span class="self">self</span>.value.is_some() {
seed.deserialize(BorrowedStrDeserializer::new(spanned::VALUE))
.map(<span class="prelude-val">Some</span>)
} <span class="kw">else </span>{
<span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>)
}
}
<span class="kw">fn </span>next_value_seed&lt;V&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, seed: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if let </span><span class="prelude-val">Some</span>(start) = <span class="self">self</span>.start.take() {
seed.deserialize(start.into_deserializer())
} <span class="kw">else if let </span><span class="prelude-val">Some</span>(end) = <span class="self">self</span>.end.take() {
seed.deserialize(end.into_deserializer())
} <span class="kw">else if let </span><span class="prelude-val">Some</span>(value) = <span class="self">self</span>.value.take() {
seed.deserialize(value.into_deserializer())
} <span class="kw">else </span>{
<span class="macro">panic!</span>(<span class="string">&quot;next_value_seed called before next_key_seed&quot;</span>)
}
}
}
<span class="kw">struct </span>DatetimeDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
visited: bool,
date: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str,
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::MapAccess&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>DatetimeDeserializer&lt;<span class="lifetime">&#39;de</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>next_key_seed&lt;K&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, seed: K) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;K::Value&gt;, Error&gt;
<span class="kw">where
</span>K: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">if </span><span class="self">self</span>.visited {
<span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>);
}
<span class="self">self</span>.visited = <span class="bool-val">true</span>;
seed.deserialize(DatetimeFieldDeserializer).map(<span class="prelude-val">Some</span>)
}
<span class="kw">fn </span>next_value_seed&lt;V&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, seed: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
seed.deserialize(StrDeserializer::new(<span class="self">self</span>.date.into()))
}
}
<span class="kw">struct </span>DatetimeFieldDeserializer;
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::Deserializer&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>DatetimeFieldDeserializer {
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>deserialize_any&lt;V&gt;(<span class="self">self</span>, visitor: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
visitor.visit_borrowed_str(datetime::FIELD)
}
<span class="macro">serde::forward_to_deserialize_any! </span>{
bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
bytes byte_buf map <span class="kw">struct </span>option unit newtype_struct
ignored_any unit_struct tuple_struct tuple <span class="kw">enum </span>identifier
}
}
<span class="kw">struct </span>DottedTableDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
name: Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;,
value: Value&lt;<span class="lifetime">&#39;a</span>&gt;,
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::EnumAccess&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>DottedTableDeserializer&lt;<span class="lifetime">&#39;de</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">type </span>Variant = TableEnumDeserializer&lt;<span class="lifetime">&#39;de</span>&gt;;
<span class="kw">fn </span>variant_seed&lt;V&gt;(<span class="self">self</span>, seed: V) -&gt; <span class="prelude-ty">Result</span>&lt;(V::Value, <span class="self">Self</span>::Variant), <span class="self">Self</span>::Error&gt;
<span class="kw">where
</span>V: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">let </span>(name, value) = (<span class="self">self</span>.name, <span class="self">self</span>.value);
seed.deserialize(StrDeserializer::new(name))
.map(|val| (val, TableEnumDeserializer { value }))
}
}
<span class="kw">struct </span>InlineTableDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
values: vec::IntoIter&lt;TablePair&lt;<span class="lifetime">&#39;a</span>&gt;&gt;,
next_value: <span class="prelude-ty">Option</span>&lt;Value&lt;<span class="lifetime">&#39;a</span>&gt;&gt;,
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::MapAccess&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>InlineTableDeserializer&lt;<span class="lifetime">&#39;de</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>next_key_seed&lt;K&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, seed: K) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;K::Value&gt;, Error&gt;
<span class="kw">where
</span>K: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">let </span>(key, value) = <span class="kw">match </span><span class="self">self</span>.values.next() {
<span class="prelude-val">Some</span>(pair) =&gt; pair,
<span class="prelude-val">None </span>=&gt; <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>),
};
<span class="self">self</span>.next_value = <span class="prelude-val">Some</span>(value);
seed.deserialize(StrDeserializer::spanned(key)).map(<span class="prelude-val">Some</span>)
}
<span class="kw">fn </span>next_value_seed&lt;V&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, seed: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, Error&gt;
<span class="kw">where
</span>V: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">let </span>value = <span class="self">self</span>.next_value.take().expect(<span class="string">&quot;Unable to read table values&quot;</span>);
seed.deserialize(ValueDeserializer::new(value))
}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::EnumAccess&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>InlineTableDeserializer&lt;<span class="lifetime">&#39;de</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">type </span>Variant = TableEnumDeserializer&lt;<span class="lifetime">&#39;de</span>&gt;;
<span class="kw">fn </span>variant_seed&lt;V&gt;(<span class="kw-2">mut </span><span class="self">self</span>, seed: V) -&gt; <span class="prelude-ty">Result</span>&lt;(V::Value, <span class="self">Self</span>::Variant), <span class="self">Self</span>::Error&gt;
<span class="kw">where
</span>V: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">let </span>(key, value) = <span class="kw">match </span><span class="self">self</span>.values.next() {
<span class="prelude-val">Some</span>(pair) =&gt; pair,
<span class="prelude-val">None </span>=&gt; {
<span class="kw">return </span><span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">None</span>, <span class="comment">// FIXME: How do we get an offset here?
</span>ErrorKind::Wanted {
expected: <span class="string">&quot;table with exactly 1 entry&quot;</span>,
found: <span class="string">&quot;empty table&quot;</span>,
},
));
}
};
seed.deserialize(StrDeserializer::new(key.<span class="number">1</span>))
.map(|val| (val, TableEnumDeserializer { value }))
}
}
<span class="doccomment">/// Deserializes table values into enum variants.
</span><span class="kw">struct </span>TableEnumDeserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
value: Value&lt;<span class="lifetime">&#39;a</span>&gt;,
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;de</span>&gt; de::VariantAccess&lt;<span class="lifetime">&#39;de</span>&gt; <span class="kw">for </span>TableEnumDeserializer&lt;<span class="lifetime">&#39;de</span>&gt; {
<span class="kw">type </span>Error = Error;
<span class="kw">fn </span>unit_variant(<span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;(), <span class="self">Self</span>::Error&gt; {
<span class="kw">match </span><span class="self">self</span>.value.e {
E::InlineTable(values) | E::DottedTable(values) =&gt; {
<span class="kw">if </span>values.is_empty() {
<span class="prelude-val">Ok</span>(())
} <span class="kw">else </span>{
<span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(<span class="self">self</span>.value.start),
ErrorKind::ExpectedEmptyTable,
))
}
}
e =&gt; <span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(<span class="self">self</span>.value.start),
ErrorKind::Wanted {
expected: <span class="string">&quot;table&quot;</span>,
found: e.type_name(),
},
)),
}
}
<span class="kw">fn </span>newtype_variant_seed&lt;T&gt;(<span class="self">self</span>, seed: T) -&gt; <span class="prelude-ty">Result</span>&lt;T::Value, <span class="self">Self</span>::Error&gt;
<span class="kw">where
</span>T: de::DeserializeSeed&lt;<span class="lifetime">&#39;de</span>&gt;,
{
seed.deserialize(ValueDeserializer::new(<span class="self">self</span>.value))
}
<span class="kw">fn </span>tuple_variant&lt;V&gt;(<span class="self">self</span>, len: usize, visitor: V) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, <span class="self">Self</span>::Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
<span class="kw">match </span><span class="self">self</span>.value.e {
E::InlineTable(values) | E::DottedTable(values) =&gt; {
<span class="kw">let </span>tuple_values = values
.into_iter()
.enumerate()
.map(|(index, (key, value))| <span class="kw">match </span>key.<span class="number">1</span>.parse::&lt;usize&gt;() {
<span class="prelude-val">Ok</span>(key_index) <span class="kw">if </span>key_index == index =&gt; <span class="prelude-val">Ok</span>(value),
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) | <span class="prelude-val">Err</span>(<span class="kw">_</span>) =&gt; <span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(key.<span class="number">0</span>.start),
ErrorKind::ExpectedTupleIndex {
expected: index,
found: key.<span class="number">1</span>.to_string(),
},
)),
})
<span class="comment">// Fold all values into a `Vec`, or return the first error.
</span>.fold(<span class="prelude-val">Ok</span>(Vec::with_capacity(len)), |result, value_result| {
result.and_then(<span class="kw">move </span>|<span class="kw-2">mut </span>tuple_values| <span class="kw">match </span>value_result {
<span class="prelude-val">Ok</span>(value) =&gt; {
tuple_values.push(value);
<span class="prelude-val">Ok</span>(tuple_values)
}
<span class="comment">// `Result&lt;de::Value, Self::Error&gt;` to `Result&lt;Vec&lt;_&gt;, Self::Error&gt;`
</span><span class="prelude-val">Err</span>(e) =&gt; <span class="prelude-val">Err</span>(e),
})
})<span class="question-mark">?</span>;
<span class="kw">if </span>tuple_values.len() == len {
de::Deserializer::deserialize_seq(
ValueDeserializer::new(Value {
e: E::Array(tuple_values),
start: <span class="self">self</span>.value.start,
end: <span class="self">self</span>.value.end,
}),
visitor,
)
} <span class="kw">else </span>{
<span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(<span class="self">self</span>.value.start),
ErrorKind::ExpectedTuple(len),
))
}
}
e =&gt; <span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(<span class="self">self</span>.value.start),
ErrorKind::Wanted {
expected: <span class="string">&quot;table&quot;</span>,
found: e.type_name(),
},
)),
}
}
<span class="kw">fn </span>struct_variant&lt;V&gt;(
<span class="self">self</span>,
fields: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>[<span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str],
visitor: V,
) -&gt; <span class="prelude-ty">Result</span>&lt;V::Value, <span class="self">Self</span>::Error&gt;
<span class="kw">where
</span>V: de::Visitor&lt;<span class="lifetime">&#39;de</span>&gt;,
{
de::Deserializer::deserialize_struct(
ValueDeserializer::new(<span class="self">self</span>.value).with_struct_key_validation(),
<span class="string">&quot;&quot;</span>, <span class="comment">// TODO: this should be the variant name
</span>fields,
visitor,
)
}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; Deserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
<span class="doccomment">/// Creates a new deserializer which will be deserializing the string
/// provided.
</span><span class="kw">pub fn </span>new(input: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str) -&gt; Deserializer&lt;<span class="lifetime">&#39;a</span>&gt; {
Deserializer {
tokens: Tokenizer::new(input),
input,
require_newline_after_table: <span class="bool-val">true</span>,
allow_duplciate_after_longer_table: <span class="bool-val">false</span>,
}
}
<span class="attribute">#[doc(hidden)]
#[deprecated(since = <span class="string">&quot;0.5.11&quot;</span>)]
</span><span class="kw">pub fn </span>end(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;(), Error&gt; {
<span class="prelude-val">Ok</span>(())
}
<span class="attribute">#[doc(hidden)]
#[deprecated(since = <span class="string">&quot;0.5.11&quot;</span>)]
</span><span class="kw">pub fn </span>set_require_newline_after_table(<span class="kw-2">&amp;mut </span><span class="self">self</span>, require: bool) {
<span class="self">self</span>.require_newline_after_table = require;
}
<span class="attribute">#[doc(hidden)]
#[deprecated(since = <span class="string">&quot;0.5.11&quot;</span>)]
</span><span class="kw">pub fn </span>set_allow_duplicate_after_longer_table(<span class="kw-2">&amp;mut </span><span class="self">self</span>, allow: bool) {
<span class="self">self</span>.allow_duplciate_after_longer_table = allow;
}
<span class="kw">fn </span>tables(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;Vec&lt;Table&lt;<span class="lifetime">&#39;a</span>&gt;&gt;, Error&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>tables = Vec::new();
<span class="kw">let </span><span class="kw-2">mut </span>cur_table = Table {
at: <span class="number">0</span>,
header: Vec::new(),
values: <span class="prelude-val">None</span>,
array: <span class="bool-val">false</span>,
};
<span class="kw">while let </span><span class="prelude-val">Some</span>(line) = <span class="self">self</span>.line()<span class="question-mark">? </span>{
<span class="kw">match </span>line {
Line::Table {
at,
<span class="kw-2">mut </span>header,
array,
} =&gt; {
<span class="kw">if </span>!cur_table.header.is_empty() || cur_table.values.is_some() {
tables.push(cur_table);
}
cur_table = Table {
at,
header: Vec::new(),
values: <span class="prelude-val">Some</span>(Vec::new()),
array,
};
<span class="kw">loop </span>{
<span class="kw">let </span>part = header.next().map_err(|e| <span class="self">self</span>.token_error(e));
<span class="kw">match </span>part<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>(part) =&gt; cur_table.header.push(part),
<span class="prelude-val">None </span>=&gt; <span class="kw">break</span>,
}
}
}
Line::KeyValue(key, value) =&gt; {
<span class="kw">if </span>cur_table.values.is_none() {
cur_table.values = <span class="prelude-val">Some</span>(Vec::new());
}
<span class="self">self</span>.add_dotted_key(key, value, cur_table.values.as_mut().unwrap())<span class="question-mark">?</span>;
}
}
}
<span class="kw">if </span>!cur_table.header.is_empty() || cur_table.values.is_some() {
tables.push(cur_table);
}
<span class="prelude-val">Ok</span>(tables)
}
<span class="kw">fn </span>line(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;Line&lt;<span class="lifetime">&#39;a</span>&gt;&gt;, Error&gt; {
<span class="kw">loop </span>{
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
<span class="kw">if </span><span class="self">self</span>.eat_comment()<span class="question-mark">? </span>{
<span class="kw">continue</span>;
}
<span class="kw">if </span><span class="self">self</span>.eat(Token::Newline)<span class="question-mark">? </span>{
<span class="kw">continue</span>;
}
<span class="kw">break</span>;
}
<span class="kw">match </span><span class="self">self</span>.peek()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((<span class="kw">_</span>, Token::LeftBracket)) =&gt; <span class="self">self</span>.table_header().map(<span class="prelude-val">Some</span>),
<span class="prelude-val">Some</span>(<span class="kw">_</span>) =&gt; <span class="self">self</span>.key_value().map(<span class="prelude-val">Some</span>),
<span class="prelude-val">None </span>=&gt; <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>),
}
}
<span class="kw">fn </span>table_header(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;Line&lt;<span class="lifetime">&#39;a</span>&gt;, Error&gt; {
<span class="kw">let </span>start = <span class="self">self</span>.tokens.current();
<span class="self">self</span>.expect(Token::LeftBracket)<span class="question-mark">?</span>;
<span class="kw">let </span>array = <span class="self">self</span>.eat(Token::LeftBracket)<span class="question-mark">?</span>;
<span class="kw">let </span>ret = Header::new(<span class="self">self</span>.tokens.clone(), array, <span class="self">self</span>.require_newline_after_table);
<span class="kw">if </span><span class="self">self</span>.require_newline_after_table {
<span class="self">self</span>.tokens.skip_to_newline();
} <span class="kw">else </span>{
<span class="kw">loop </span>{
<span class="kw">match </span><span class="self">self</span>.next()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((<span class="kw">_</span>, Token::RightBracket)) =&gt; {
<span class="kw">if </span>array {
<span class="self">self</span>.eat(Token::RightBracket)<span class="question-mark">?</span>;
}
<span class="kw">break</span>;
}
<span class="prelude-val">Some</span>((<span class="kw">_</span>, Token::Newline)) | <span class="prelude-val">None </span>=&gt; <span class="kw">break</span>,
<span class="kw">_ </span>=&gt; {}
}
}
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
}
<span class="prelude-val">Ok</span>(Line::Table {
at: start,
header: ret,
array,
})
}
<span class="kw">fn </span>key_value(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;Line&lt;<span class="lifetime">&#39;a</span>&gt;, Error&gt; {
<span class="kw">let </span>key = <span class="self">self</span>.dotted_key()<span class="question-mark">?</span>;
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
<span class="self">self</span>.expect(Token::Equals)<span class="question-mark">?</span>;
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
<span class="kw">let </span>value = <span class="self">self</span>.value()<span class="question-mark">?</span>;
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
<span class="kw">if </span>!<span class="self">self</span>.eat_comment()<span class="question-mark">? </span>{
<span class="self">self</span>.eat_newline_or_eof()<span class="question-mark">?</span>;
}
<span class="prelude-val">Ok</span>(Line::KeyValue(key, value))
}
<span class="kw">fn </span>value(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;Value&lt;<span class="lifetime">&#39;a</span>&gt;, Error&gt; {
<span class="kw">let </span>at = <span class="self">self</span>.tokens.current();
<span class="kw">let </span>value = <span class="kw">match </span><span class="self">self</span>.next()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((Span { start, end }, Token::String { val, .. })) =&gt; Value {
e: E::String(val),
start,
end,
},
<span class="prelude-val">Some</span>((Span { start, end }, Token::Keylike(<span class="string">&quot;true&quot;</span>))) =&gt; Value {
e: E::Boolean(<span class="bool-val">true</span>),
start,
end,
},
<span class="prelude-val">Some</span>((Span { start, end }, Token::Keylike(<span class="string">&quot;false&quot;</span>))) =&gt; Value {
e: E::Boolean(<span class="bool-val">false</span>),
start,
end,
},
<span class="prelude-val">Some</span>((span, Token::Keylike(key))) =&gt; <span class="self">self</span>.parse_keylike(at, span, key)<span class="question-mark">?</span>,
<span class="prelude-val">Some</span>((span, Token::Plus)) =&gt; <span class="self">self</span>.number_leading_plus(span)<span class="question-mark">?</span>,
<span class="prelude-val">Some</span>((Span { start, .. }, Token::LeftBrace)) =&gt; {
<span class="self">self</span>.inline_table().map(|(Span { end, .. }, table)| Value {
e: E::InlineTable(table),
start,
end,
})<span class="question-mark">?
</span>}
<span class="prelude-val">Some</span>((Span { start, .. }, Token::LeftBracket)) =&gt; {
<span class="self">self</span>.array().map(|(Span { end, .. }, array)| Value {
e: E::Array(array),
start,
end,
})<span class="question-mark">?
</span>}
<span class="prelude-val">Some</span>(token) =&gt; {
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(
at,
ErrorKind::Wanted {
expected: <span class="string">&quot;a value&quot;</span>,
found: token.<span class="number">1</span>.describe(),
},
));
}
<span class="prelude-val">None </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.eof()),
};
<span class="prelude-val">Ok</span>(value)
}
<span class="kw">fn </span>parse_keylike(<span class="kw-2">&amp;mut </span><span class="self">self</span>, at: usize, span: Span, key: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str) -&gt; <span class="prelude-ty">Result</span>&lt;Value&lt;<span class="lifetime">&#39;a</span>&gt;, Error&gt; {
<span class="kw">if </span>key == <span class="string">&quot;inf&quot; </span>|| key == <span class="string">&quot;nan&quot; </span>{
<span class="kw">return </span><span class="self">self</span>.number_or_date(span, key);
}
<span class="kw">let </span>first_char = key.chars().next().expect(<span class="string">&quot;key should not be empty here&quot;</span>);
<span class="kw">match </span>first_char {
<span class="string">&#39;-&#39; </span>| <span class="string">&#39;0&#39;</span>..=<span class="string">&#39;9&#39; </span>=&gt; <span class="self">self</span>.number_or_date(span, key),
<span class="kw">_ </span>=&gt; <span class="prelude-val">Err</span>(<span class="self">self</span>.error(at, ErrorKind::UnquotedString)),
}
}
<span class="kw">fn </span>number_or_date(<span class="kw-2">&amp;mut </span><span class="self">self</span>, span: Span, s: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str) -&gt; <span class="prelude-ty">Result</span>&lt;Value&lt;<span class="lifetime">&#39;a</span>&gt;, Error&gt; {
<span class="kw">if </span>s.contains(<span class="string">&#39;T&#39;</span>)
|| s.contains(<span class="string">&#39;t&#39;</span>)
|| (s.len() &gt; <span class="number">1 </span>&amp;&amp; s[<span class="number">1</span>..].contains(<span class="string">&#39;-&#39;</span>) &amp;&amp; !s.contains(<span class="string">&quot;e-&quot;</span>) &amp;&amp; !s.contains(<span class="string">&quot;E-&quot;</span>))
{
<span class="self">self</span>.datetime(span, s, <span class="bool-val">false</span>)
.map(|(Span { start, end }, d)| Value {
e: E::Datetime(d),
start,
end,
})
} <span class="kw">else if </span><span class="self">self</span>.eat(Token::Colon)<span class="question-mark">? </span>{
<span class="self">self</span>.datetime(span, s, <span class="bool-val">true</span>)
.map(|(Span { start, end }, d)| Value {
e: E::Datetime(d),
start,
end,
})
} <span class="kw">else </span>{
<span class="self">self</span>.number(span, s)
}
}
<span class="doccomment">/// Returns a string or table value type.
///
/// Used to deserialize enums. Unit enums may be represented as a string or a table, all other
/// structures (tuple, newtype, struct) must be represented as a table.
</span><span class="kw">fn </span>string_or_table(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;(Value&lt;<span class="lifetime">&#39;a</span>&gt;, <span class="prelude-ty">Option</span>&lt;Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;&gt;), Error&gt; {
<span class="kw">match </span><span class="self">self</span>.peek()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((span, Token::LeftBracket)) =&gt; {
<span class="kw">let </span>tables = <span class="self">self</span>.tables()<span class="question-mark">?</span>;
<span class="kw">if </span>tables.len() != <span class="number">1 </span>{
<span class="kw">return </span><span class="prelude-val">Err</span>(Error::from_kind(
<span class="prelude-val">Some</span>(span.start),
ErrorKind::Wanted {
expected: <span class="string">&quot;exactly 1 table&quot;</span>,
found: <span class="kw">if </span>tables.is_empty() {
<span class="string">&quot;zero tables&quot;
</span>} <span class="kw">else </span>{
<span class="string">&quot;more than 1 table&quot;
</span>},
},
));
}
<span class="kw">let </span>table = tables
.into_iter()
.next()
.expect(<span class="string">&quot;Expected exactly one table&quot;</span>);
<span class="kw">let </span>header = table
.header
.last()
.expect(<span class="string">&quot;Expected at least one header value for table.&quot;</span>);
<span class="kw">let </span>start = table.at;
<span class="kw">let </span>end = table
.values
.as_ref()
.and_then(|values| values.last())
.map(|<span class="kw-2">&amp;</span>(<span class="kw">_</span>, <span class="kw-2">ref </span>val)| val.end)
.unwrap_or_else(|| header.<span class="number">1</span>.len());
<span class="prelude-val">Ok</span>((
Value {
e: E::DottedTable(table.values.unwrap_or_default()),
start,
end,
},
<span class="prelude-val">Some</span>(header.<span class="number">1</span>.clone()),
))
}
<span class="prelude-val">Some</span>(<span class="kw">_</span>) =&gt; <span class="self">self</span>.value().map(|val| (val, <span class="prelude-val">None</span>)),
<span class="prelude-val">None </span>=&gt; <span class="prelude-val">Err</span>(<span class="self">self</span>.eof()),
}
}
<span class="kw">fn </span>number(<span class="kw-2">&amp;mut </span><span class="self">self</span>, Span { start, end }: Span, s: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str) -&gt; <span class="prelude-ty">Result</span>&lt;Value&lt;<span class="lifetime">&#39;a</span>&gt;, Error&gt; {
<span class="kw">let </span>to_integer = |f| Value {
e: E::Integer(f),
start,
end,
};
<span class="kw">if let </span><span class="prelude-val">Some</span>(value) = s.strip_prefix(<span class="string">&quot;0x&quot;</span>) {
<span class="self">self</span>.integer(value, <span class="number">16</span>).map(to_integer)
} <span class="kw">else if let </span><span class="prelude-val">Some</span>(value) = s.strip_prefix(<span class="string">&quot;0o&quot;</span>) {
<span class="self">self</span>.integer(value, <span class="number">8</span>).map(to_integer)
} <span class="kw">else if let </span><span class="prelude-val">Some</span>(value) = s.strip_prefix(<span class="string">&quot;0b&quot;</span>) {
<span class="self">self</span>.integer(value, <span class="number">2</span>).map(to_integer)
} <span class="kw">else if </span>s.contains(<span class="string">&#39;e&#39;</span>) || s.contains(<span class="string">&#39;E&#39;</span>) {
<span class="self">self</span>.float(s, <span class="prelude-val">None</span>).map(|f| Value {
e: E::Float(f),
start,
end,
})
} <span class="kw">else if </span><span class="self">self</span>.eat(Token::Period)<span class="question-mark">? </span>{
<span class="kw">let </span>at = <span class="self">self</span>.tokens.current();
<span class="kw">match </span><span class="self">self</span>.next()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((Span { start, end }, Token::Keylike(after))) =&gt; {
<span class="self">self</span>.float(s, <span class="prelude-val">Some</span>(after)).map(|f| Value {
e: E::Float(f),
start,
end,
})
}
<span class="kw">_ </span>=&gt; <span class="prelude-val">Err</span>(<span class="self">self</span>.error(at, ErrorKind::NumberInvalid)),
}
} <span class="kw">else if </span>s == <span class="string">&quot;inf&quot; </span>{
<span class="prelude-val">Ok</span>(Value {
e: E::Float(f64::INFINITY),
start,
end,
})
} <span class="kw">else if </span>s == <span class="string">&quot;-inf&quot; </span>{
<span class="prelude-val">Ok</span>(Value {
e: E::Float(f64::NEG_INFINITY),
start,
end,
})
} <span class="kw">else if </span>s == <span class="string">&quot;nan&quot; </span>{
<span class="prelude-val">Ok</span>(Value {
e: E::Float(f64::NAN),
start,
end,
})
} <span class="kw">else if </span>s == <span class="string">&quot;-nan&quot; </span>{
<span class="prelude-val">Ok</span>(Value {
e: E::Float(-f64::NAN),
start,
end,
})
} <span class="kw">else </span>{
<span class="self">self</span>.integer(s, <span class="number">10</span>).map(to_integer)
}
}
<span class="kw">fn </span>number_leading_plus(<span class="kw-2">&amp;mut </span><span class="self">self</span>, Span { start, .. }: Span) -&gt; <span class="prelude-ty">Result</span>&lt;Value&lt;<span class="lifetime">&#39;a</span>&gt;, Error&gt; {
<span class="kw">let </span>start_token = <span class="self">self</span>.tokens.current();
<span class="kw">match </span><span class="self">self</span>.next()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((Span { end, .. }, Token::Keylike(s))) =&gt; <span class="self">self</span>.number(Span { start, end }, s),
<span class="kw">_ </span>=&gt; <span class="prelude-val">Err</span>(<span class="self">self</span>.error(start_token, ErrorKind::NumberInvalid)),
}
}
<span class="kw">fn </span>integer(<span class="kw-2">&amp;</span><span class="self">self</span>, s: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str, radix: u32) -&gt; <span class="prelude-ty">Result</span>&lt;i64, Error&gt; {
<span class="kw">let </span>allow_sign = radix == <span class="number">10</span>;
<span class="kw">let </span>allow_leading_zeros = radix != <span class="number">10</span>;
<span class="kw">let </span>(prefix, suffix) = <span class="self">self</span>.parse_integer(s, allow_sign, allow_leading_zeros, radix)<span class="question-mark">?</span>;
<span class="kw">let </span>start = <span class="self">self</span>.tokens.substr_offset(s);
<span class="kw">if </span>!suffix.is_empty() {
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::NumberInvalid));
}
i64::from_str_radix(prefix.replace(<span class="string">&#39;_&#39;</span>, <span class="string">&quot;&quot;</span>).trim_start_matches(<span class="string">&#39;+&#39;</span>), radix)
.map_err(|_e| <span class="self">self</span>.error(start, ErrorKind::NumberInvalid))
}
<span class="kw">fn </span>parse_integer(
<span class="kw-2">&amp;</span><span class="self">self</span>,
s: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str,
allow_sign: bool,
allow_leading_zeros: bool,
radix: u32,
) -&gt; <span class="prelude-ty">Result</span>&lt;(<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str, <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str), Error&gt; {
<span class="kw">let </span>start = <span class="self">self</span>.tokens.substr_offset(s);
<span class="kw">let </span><span class="kw-2">mut </span>first = <span class="bool-val">true</span>;
<span class="kw">let </span><span class="kw-2">mut </span>first_zero = <span class="bool-val">false</span>;
<span class="kw">let </span><span class="kw-2">mut </span>underscore = <span class="bool-val">false</span>;
<span class="kw">let </span><span class="kw-2">mut </span>end = s.len();
<span class="kw">for </span>(i, c) <span class="kw">in </span>s.char_indices() {
<span class="kw">let </span>at = i + start;
<span class="kw">if </span>i == <span class="number">0 </span>&amp;&amp; (c == <span class="string">&#39;+&#39; </span>|| c == <span class="string">&#39;-&#39;</span>) &amp;&amp; allow_sign {
<span class="kw">continue</span>;
}
<span class="kw">if </span>c == <span class="string">&#39;0&#39; </span>&amp;&amp; first {
first_zero = <span class="bool-val">true</span>;
} <span class="kw">else if </span>c.is_digit(radix) {
<span class="kw">if </span>!first &amp;&amp; first_zero &amp;&amp; !allow_leading_zeros {
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(at, ErrorKind::NumberInvalid));
}
underscore = <span class="bool-val">false</span>;
} <span class="kw">else if </span>c == <span class="string">&#39;_&#39; </span>&amp;&amp; first {
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(at, ErrorKind::NumberInvalid));
} <span class="kw">else if </span>c == <span class="string">&#39;_&#39; </span>&amp;&amp; !underscore {
underscore = <span class="bool-val">true</span>;
} <span class="kw">else </span>{
end = i;
<span class="kw">break</span>;
}
first = <span class="bool-val">false</span>;
}
<span class="kw">if </span>first || underscore {
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::NumberInvalid));
}
<span class="prelude-val">Ok</span>((<span class="kw-2">&amp;</span>s[..end], <span class="kw-2">&amp;</span>s[end..]))
}
<span class="kw">fn </span>float(<span class="kw-2">&amp;mut </span><span class="self">self</span>, s: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str, after_decimal: <span class="prelude-ty">Option</span>&lt;<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str&gt;) -&gt; <span class="prelude-ty">Result</span>&lt;f64, Error&gt; {
<span class="kw">let </span>(integral, <span class="kw-2">mut </span>suffix) = <span class="self">self</span>.parse_integer(s, <span class="bool-val">true</span>, <span class="bool-val">false</span>, <span class="number">10</span>)<span class="question-mark">?</span>;
<span class="kw">let </span>start = <span class="self">self</span>.tokens.substr_offset(integral);
<span class="kw">let </span><span class="kw-2">mut </span>fraction = <span class="prelude-val">None</span>;
<span class="kw">if let </span><span class="prelude-val">Some</span>(after) = after_decimal {
<span class="kw">if </span>!suffix.is_empty() {
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::NumberInvalid));
}
<span class="kw">let </span>(a, b) = <span class="self">self</span>.parse_integer(after, <span class="bool-val">false</span>, <span class="bool-val">true</span>, <span class="number">10</span>)<span class="question-mark">?</span>;
fraction = <span class="prelude-val">Some</span>(a);
suffix = b;
}
<span class="kw">let </span><span class="kw-2">mut </span>exponent = <span class="prelude-val">None</span>;
<span class="kw">if </span>suffix.starts_with(<span class="string">&#39;e&#39;</span>) || suffix.starts_with(<span class="string">&#39;E&#39;</span>) {
<span class="kw">let </span>(a, b) = <span class="kw">if </span>suffix.len() == <span class="number">1 </span>{
<span class="self">self</span>.eat(Token::Plus)<span class="question-mark">?</span>;
<span class="kw">match </span><span class="self">self</span>.next()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((<span class="kw">_</span>, Token::Keylike(s))) =&gt; <span class="self">self</span>.parse_integer(s, <span class="bool-val">false</span>, <span class="bool-val">true</span>, <span class="number">10</span>)<span class="question-mark">?</span>,
<span class="kw">_ </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::NumberInvalid)),
}
} <span class="kw">else </span>{
<span class="self">self</span>.parse_integer(<span class="kw-2">&amp;</span>suffix[<span class="number">1</span>..], <span class="bool-val">true</span>, <span class="bool-val">true</span>, <span class="number">10</span>)<span class="question-mark">?
</span>};
<span class="kw">if </span>!b.is_empty() {
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::NumberInvalid));
}
exponent = <span class="prelude-val">Some</span>(a);
} <span class="kw">else if </span>!suffix.is_empty() {
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::NumberInvalid));
}
<span class="kw">let </span><span class="kw-2">mut </span>number = integral
.trim_start_matches(<span class="string">&#39;+&#39;</span>)
.chars()
.filter(|c| <span class="kw-2">*</span>c != <span class="string">&#39;_&#39;</span>)
.collect::&lt;String&gt;();
<span class="kw">if let </span><span class="prelude-val">Some</span>(fraction) = fraction {
number.push(<span class="string">&#39;.&#39;</span>);
number.extend(fraction.chars().filter(|c| <span class="kw-2">*</span>c != <span class="string">&#39;_&#39;</span>));
}
<span class="kw">if let </span><span class="prelude-val">Some</span>(exponent) = exponent {
number.push(<span class="string">&#39;E&#39;</span>);
number.extend(exponent.chars().filter(|c| <span class="kw-2">*</span>c != <span class="string">&#39;_&#39;</span>));
}
number
.parse()
.map_err(|_e| <span class="self">self</span>.error(start, ErrorKind::NumberInvalid))
.and_then(|n: f64| {
<span class="kw">if </span>n.is_finite() {
<span class="prelude-val">Ok</span>(n)
} <span class="kw">else </span>{
<span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::NumberInvalid))
}
})
}
<span class="kw">fn </span>datetime(
<span class="kw-2">&amp;mut </span><span class="self">self</span>,
<span class="kw-2">mut </span>span: Span,
date: <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str,
colon_eaten: bool,
) -&gt; <span class="prelude-ty">Result</span>&lt;(Span, <span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str), Error&gt; {
<span class="kw">let </span>start = <span class="self">self</span>.tokens.substr_offset(date);
<span class="comment">// Check for space separated date and time.
</span><span class="kw">let </span><span class="kw-2">mut </span>lookahead = <span class="self">self</span>.tokens.clone();
<span class="kw">if let </span><span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>((<span class="kw">_</span>, Token::Whitespace(<span class="string">&quot; &quot;</span>)))) = lookahead.next() {
<span class="comment">// Check if hour follows.
</span><span class="kw">if let </span><span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>((<span class="kw">_</span>, Token::Keylike(<span class="kw">_</span>)))) = lookahead.next() {
<span class="self">self</span>.next()<span class="question-mark">?</span>; <span class="comment">// skip space
</span><span class="self">self</span>.next()<span class="question-mark">?</span>; <span class="comment">// skip keylike hour
</span>}
}
<span class="kw">if </span>colon_eaten || <span class="self">self</span>.eat(Token::Colon)<span class="question-mark">? </span>{
<span class="comment">// minutes
</span><span class="kw">match </span><span class="self">self</span>.next()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((<span class="kw">_</span>, Token::Keylike(<span class="kw">_</span>))) =&gt; {}
<span class="kw">_ </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::DateInvalid)),
}
<span class="comment">// Seconds
</span><span class="self">self</span>.expect(Token::Colon)<span class="question-mark">?</span>;
<span class="kw">match </span><span class="self">self</span>.next()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((Span { end, .. }, Token::Keylike(<span class="kw">_</span>))) =&gt; {
span.end = end;
}
<span class="kw">_ </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::DateInvalid)),
}
<span class="comment">// Fractional seconds
</span><span class="kw">if </span><span class="self">self</span>.eat(Token::Period)<span class="question-mark">? </span>{
<span class="kw">match </span><span class="self">self</span>.next()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((Span { end, .. }, Token::Keylike(<span class="kw">_</span>))) =&gt; {
span.end = end;
}
<span class="kw">_ </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::DateInvalid)),
}
}
<span class="comment">// offset
</span><span class="kw">if </span><span class="self">self</span>.eat(Token::Plus)<span class="question-mark">? </span>{
<span class="kw">match </span><span class="self">self</span>.next()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((Span { end, .. }, Token::Keylike(<span class="kw">_</span>))) =&gt; {
span.end = end;
}
<span class="kw">_ </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::DateInvalid)),
}
}
<span class="kw">if </span><span class="self">self</span>.eat(Token::Colon)<span class="question-mark">? </span>{
<span class="kw">match </span><span class="self">self</span>.next()<span class="question-mark">? </span>{
<span class="prelude-val">Some</span>((Span { end, .. }, Token::Keylike(<span class="kw">_</span>))) =&gt; {
span.end = end;
}
<span class="kw">_ </span>=&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::DateInvalid)),
}
}
}
<span class="kw">let </span>end = <span class="self">self</span>.tokens.current();
<span class="prelude-val">Ok</span>((span, <span class="kw-2">&amp;</span><span class="self">self</span>.tokens.input()[start..end]))
}
<span class="comment">// TODO(#140): shouldn&#39;t buffer up this entire table in memory, it&#39;d be
// great to defer parsing everything until later.
</span><span class="kw">fn </span>inline_table(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;(Span, Vec&lt;TablePair&lt;<span class="lifetime">&#39;a</span>&gt;&gt;), Error&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>ret = Vec::new();
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
<span class="kw">if let </span><span class="prelude-val">Some</span>(span) = <span class="self">self</span>.eat_spanned(Token::RightBrace)<span class="question-mark">? </span>{
<span class="kw">return </span><span class="prelude-val">Ok</span>((span, ret));
}
<span class="kw">loop </span>{
<span class="kw">let </span>key = <span class="self">self</span>.dotted_key()<span class="question-mark">?</span>;
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
<span class="self">self</span>.expect(Token::Equals)<span class="question-mark">?</span>;
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
<span class="kw">let </span>value = <span class="self">self</span>.value()<span class="question-mark">?</span>;
<span class="self">self</span>.add_dotted_key(key, value, <span class="kw-2">&amp;mut </span>ret)<span class="question-mark">?</span>;
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
<span class="kw">if let </span><span class="prelude-val">Some</span>(span) = <span class="self">self</span>.eat_spanned(Token::RightBrace)<span class="question-mark">? </span>{
<span class="kw">return </span><span class="prelude-val">Ok</span>((span, ret));
}
<span class="self">self</span>.expect(Token::Comma)<span class="question-mark">?</span>;
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
}
}
<span class="comment">// TODO(#140): shouldn&#39;t buffer up this entire array in memory, it&#39;d be
// great to defer parsing everything until later.
</span><span class="kw">fn </span>array(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;(Span, Vec&lt;Value&lt;<span class="lifetime">&#39;a</span>&gt;&gt;), Error&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>ret = Vec::new();
<span class="kw">let </span>intermediate = |me: <span class="kw-2">&amp;mut </span>Deserializer&lt;<span class="lifetime">&#39;_</span>&gt;| {
<span class="kw">loop </span>{
me.eat_whitespace()<span class="question-mark">?</span>;
<span class="kw">if </span>!me.eat(Token::Newline)<span class="question-mark">? </span>&amp;&amp; !me.eat_comment()<span class="question-mark">? </span>{
<span class="kw">break</span>;
}
}
<span class="prelude-val">Ok</span>(())
};
<span class="kw">loop </span>{
intermediate(<span class="self">self</span>)<span class="question-mark">?</span>;
<span class="kw">if let </span><span class="prelude-val">Some</span>(span) = <span class="self">self</span>.eat_spanned(Token::RightBracket)<span class="question-mark">? </span>{
<span class="kw">return </span><span class="prelude-val">Ok</span>((span, ret));
}
<span class="kw">let </span>value = <span class="self">self</span>.value()<span class="question-mark">?</span>;
ret.push(value);
intermediate(<span class="self">self</span>)<span class="question-mark">?</span>;
<span class="kw">if </span>!<span class="self">self</span>.eat(Token::Comma)<span class="question-mark">? </span>{
<span class="kw">break</span>;
}
}
intermediate(<span class="self">self</span>)<span class="question-mark">?</span>;
<span class="kw">let </span>span = <span class="self">self</span>.expect_spanned(Token::RightBracket)<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>((span, ret))
}
<span class="kw">fn </span>table_key(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;(Span, Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;), Error&gt; {
<span class="self">self</span>.tokens.table_key().map_err(|e| <span class="self">self</span>.token_error(e))
}
<span class="kw">fn </span>dotted_key(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;Vec&lt;(Span, Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;)&gt;, Error&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>result = <span class="macro">vec!</span>[<span class="self">self</span>.table_key()<span class="question-mark">?</span>];
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
<span class="kw">while </span><span class="self">self</span>.eat(Token::Period)<span class="question-mark">? </span>{
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
result.push(<span class="self">self</span>.table_key()<span class="question-mark">?</span>);
<span class="self">self</span>.eat_whitespace()<span class="question-mark">?</span>;
}
<span class="prelude-val">Ok</span>(result)
}
<span class="doccomment">/// Stores a value in the appropriate hierarchical structure positioned based on the dotted key.
///
/// Given the following definition: `multi.part.key = &quot;value&quot;`, `multi` and `part` are
/// intermediate parts which are mapped to the relevant fields in the deserialized type&#39;s data
/// hierarchy.
///
/// # Parameters
///
/// * `key_parts`: Each segment of the dotted key, e.g. `part.one` maps to
/// `vec![Cow::Borrowed(&quot;part&quot;), Cow::Borrowed(&quot;one&quot;)].`
/// * `value`: The parsed value.
/// * `values`: The `Vec` to store the value in.
</span><span class="kw">fn </span>add_dotted_key(
<span class="kw-2">&amp;</span><span class="self">self</span>,
<span class="kw-2">mut </span>key_parts: Vec&lt;(Span, Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;)&gt;,
value: Value&lt;<span class="lifetime">&#39;a</span>&gt;,
values: <span class="kw-2">&amp;mut </span>Vec&lt;TablePair&lt;<span class="lifetime">&#39;a</span>&gt;&gt;,
) -&gt; <span class="prelude-ty">Result</span>&lt;(), Error&gt; {
<span class="kw">let </span>key = key_parts.remove(<span class="number">0</span>);
<span class="kw">if </span>key_parts.is_empty() {
values.push((key, value));
<span class="kw">return </span><span class="prelude-val">Ok</span>(());
}
<span class="kw">match </span>values.iter_mut().find(|&amp;&amp;<span class="kw-2">mut </span>(<span class="kw-2">ref </span>k, <span class="kw">_</span>)| <span class="kw-2">*</span>k.<span class="number">1 </span>== key.<span class="number">1</span>) {
<span class="prelude-val">Some</span>(<span class="kw-2">&amp;mut </span>(
<span class="kw">_</span>,
Value {
e: E::DottedTable(<span class="kw-2">ref mut </span>v),
..
},
)) =&gt; {
<span class="kw">return </span><span class="self">self</span>.add_dotted_key(key_parts, value, v);
}
<span class="prelude-val">Some</span>(<span class="kw-2">&amp;mut </span>(<span class="kw">_</span>, Value { start, .. })) =&gt; {
<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="self">self</span>.error(start, ErrorKind::DottedKeyInvalidType));
}
<span class="prelude-val">None </span>=&gt; {}
}
<span class="comment">// The start/end value is somewhat misleading here.
</span><span class="kw">let </span>table_values = Value {
e: E::DottedTable(Vec::new()),
start: value.start,
end: value.end,
};
values.push((key, table_values));
<span class="kw">let </span>last_i = values.len() - <span class="number">1</span>;
<span class="kw">if let </span>(
<span class="kw">_</span>,
Value {
e: E::DottedTable(<span class="kw-2">ref mut </span>v),
..
},
) = values[last_i]
{
<span class="self">self</span>.add_dotted_key(key_parts, value, v)<span class="question-mark">?</span>;
}
<span class="prelude-val">Ok</span>(())
}
<span class="kw">fn </span>eat_whitespace(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;(), Error&gt; {
<span class="self">self</span>.tokens
.eat_whitespace()
.map_err(|e| <span class="self">self</span>.token_error(e))
}
<span class="kw">fn </span>eat_comment(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;bool, Error&gt; {
<span class="self">self</span>.tokens.eat_comment().map_err(|e| <span class="self">self</span>.token_error(e))
}
<span class="kw">fn </span>eat_newline_or_eof(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;(), Error&gt; {
<span class="self">self</span>.tokens
.eat_newline_or_eof()
.map_err(|e| <span class="self">self</span>.token_error(e))
}
<span class="kw">fn </span>eat(<span class="kw-2">&amp;mut </span><span class="self">self</span>, expected: Token&lt;<span class="lifetime">&#39;a</span>&gt;) -&gt; <span class="prelude-ty">Result</span>&lt;bool, Error&gt; {
<span class="self">self</span>.tokens.eat(expected).map_err(|e| <span class="self">self</span>.token_error(e))
}
<span class="kw">fn </span>eat_spanned(<span class="kw-2">&amp;mut </span><span class="self">self</span>, expected: Token&lt;<span class="lifetime">&#39;a</span>&gt;) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;Span&gt;, Error&gt; {
<span class="self">self</span>.tokens
.eat_spanned(expected)
.map_err(|e| <span class="self">self</span>.token_error(e))
}
<span class="kw">fn </span>expect(<span class="kw-2">&amp;mut </span><span class="self">self</span>, expected: Token&lt;<span class="lifetime">&#39;a</span>&gt;) -&gt; <span class="prelude-ty">Result</span>&lt;(), Error&gt; {
<span class="self">self</span>.tokens
.expect(expected)
.map_err(|e| <span class="self">self</span>.token_error(e))
}
<span class="kw">fn </span>expect_spanned(<span class="kw-2">&amp;mut </span><span class="self">self</span>, expected: Token&lt;<span class="lifetime">&#39;a</span>&gt;) -&gt; <span class="prelude-ty">Result</span>&lt;Span, Error&gt; {
<span class="self">self</span>.tokens
.expect_spanned(expected)
.map_err(|e| <span class="self">self</span>.token_error(e))
}
<span class="kw">fn </span>next(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;(Span, Token&lt;<span class="lifetime">&#39;a</span>&gt;)&gt;, Error&gt; {
<span class="self">self</span>.tokens.next().map_err(|e| <span class="self">self</span>.token_error(e))
}
<span class="kw">fn </span>peek(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;(Span, Token&lt;<span class="lifetime">&#39;a</span>&gt;)&gt;, Error&gt; {
<span class="self">self</span>.tokens.peek().map_err(|e| <span class="self">self</span>.token_error(e))
}
<span class="kw">fn </span>eof(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Error {
<span class="self">self</span>.error(<span class="self">self</span>.input.len(), ErrorKind::UnexpectedEof)
}
<span class="kw">fn </span>token_error(<span class="kw-2">&amp;</span><span class="self">self</span>, error: TokenError) -&gt; Error {
<span class="kw">match </span>error {
TokenError::InvalidCharInString(at, ch) =&gt; {
<span class="self">self</span>.error(at, ErrorKind::InvalidCharInString(ch))
}
TokenError::InvalidEscape(at, ch) =&gt; <span class="self">self</span>.error(at, ErrorKind::InvalidEscape(ch)),
TokenError::InvalidEscapeValue(at, v) =&gt; {
<span class="self">self</span>.error(at, ErrorKind::InvalidEscapeValue(v))
}
TokenError::InvalidHexEscape(at, ch) =&gt; <span class="self">self</span>.error(at, ErrorKind::InvalidHexEscape(ch)),
TokenError::NewlineInString(at) =&gt; <span class="self">self</span>.error(at, ErrorKind::NewlineInString),
TokenError::Unexpected(at, ch) =&gt; <span class="self">self</span>.error(at, ErrorKind::Unexpected(ch)),
TokenError::UnterminatedString(at) =&gt; <span class="self">self</span>.error(at, ErrorKind::UnterminatedString),
TokenError::NewlineInTableKey(at) =&gt; <span class="self">self</span>.error(at, ErrorKind::NewlineInTableKey),
TokenError::Wanted {
at,
expected,
found,
} =&gt; <span class="self">self</span>.error(at, ErrorKind::Wanted { expected, found }),
TokenError::MultilineStringKey(at) =&gt; <span class="self">self</span>.error(at, ErrorKind::MultilineStringKey),
}
}
<span class="kw">fn </span>error(<span class="kw-2">&amp;</span><span class="self">self</span>, at: usize, kind: ErrorKind) -&gt; Error {
<span class="kw">let </span><span class="kw-2">mut </span>err = Error::from_kind(<span class="prelude-val">Some</span>(at), kind);
err.fix_linecol(|at| <span class="self">self</span>.to_linecol(at));
err
}
<span class="doccomment">/// Converts a byte offset from an error message to a (line, column) pair
///
/// All indexes are 0-based.
</span><span class="kw">fn </span>to_linecol(<span class="kw-2">&amp;</span><span class="self">self</span>, offset: usize) -&gt; (usize, usize) {
<span class="kw">let </span><span class="kw-2">mut </span>cur = <span class="number">0</span>;
<span class="comment">// Use split_terminator instead of lines so that if there is a `\r`,
// it is included in the offset calculation. The `+1` values below
// account for the `\n`.
</span><span class="kw">for </span>(i, line) <span class="kw">in </span><span class="self">self</span>.input.split_terminator(<span class="string">&#39;\n&#39;</span>).enumerate() {
<span class="kw">if </span>cur + line.len() + <span class="number">1 </span>&gt; offset {
<span class="kw">return </span>(i, offset - cur);
}
cur += line.len() + <span class="number">1</span>;
}
(<span class="self">self</span>.input.lines().count(), <span class="number">0</span>)
}
}
<span class="kw">impl </span>Error {
<span class="doccomment">/// Produces a (line, column) pair of the position of the error if available
///
/// All indexes are 0-based.
</span><span class="kw">pub fn </span>line_col(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;(usize, usize)&gt; {
<span class="self">self</span>.inner.line.map(|line| (line, <span class="self">self</span>.inner.col))
}
<span class="kw">fn </span>from_kind(at: <span class="prelude-ty">Option</span>&lt;usize&gt;, kind: ErrorKind) -&gt; Error {
Error {
inner: Box::new(ErrorInner {
kind,
line: <span class="prelude-val">None</span>,
col: <span class="number">0</span>,
at,
message: String::new(),
key: Vec::new(),
}),
}
}
<span class="kw">fn </span>custom(at: <span class="prelude-ty">Option</span>&lt;usize&gt;, s: String) -&gt; Error {
Error {
inner: Box::new(ErrorInner {
kind: ErrorKind::Custom,
line: <span class="prelude-val">None</span>,
col: <span class="number">0</span>,
at,
message: s,
key: Vec::new(),
}),
}
}
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>add_key_context(<span class="kw-2">&amp;mut </span><span class="self">self</span>, key: <span class="kw-2">&amp;</span>str) {
<span class="self">self</span>.inner.key.insert(<span class="number">0</span>, key.to_string());
}
<span class="kw">fn </span>fix_offset&lt;F&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, f: F)
<span class="kw">where
</span>F: FnOnce() -&gt; <span class="prelude-ty">Option</span>&lt;usize&gt;,
{
<span class="comment">// An existing offset is always better positioned than anything we
// might want to add later.
</span><span class="kw">if </span><span class="self">self</span>.inner.at.is_none() {
<span class="self">self</span>.inner.at = f();
}
}
<span class="kw">fn </span>fix_linecol&lt;F&gt;(<span class="kw-2">&amp;mut </span><span class="self">self</span>, f: F)
<span class="kw">where
</span>F: FnOnce(usize) -&gt; (usize, usize),
{
<span class="kw">if let </span><span class="prelude-val">Some</span>(at) = <span class="self">self</span>.inner.at {
<span class="kw">let </span>(line, col) = f(at);
<span class="self">self</span>.inner.line = <span class="prelude-val">Some</span>(line);
<span class="self">self</span>.inner.col = col;
}
}
}
<span class="kw">impl </span>std::convert::From&lt;Error&gt; <span class="kw">for </span>std::io::Error {
<span class="kw">fn </span>from(e: Error) -&gt; <span class="self">Self </span>{
std::io::Error::new(std::io::ErrorKind::InvalidData, e.to_string())
}
}
<span class="kw">impl </span>fmt::Display <span class="kw">for </span>Error {
<span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; fmt::Result {
<span class="kw">match </span><span class="kw-2">&amp;</span><span class="self">self</span>.inner.kind {
ErrorKind::UnexpectedEof =&gt; <span class="string">&quot;unexpected eof encountered&quot;</span>.fmt(f)<span class="question-mark">?</span>,
ErrorKind::InvalidCharInString(c) =&gt; <span class="macro">write!</span>(
f,
<span class="string">&quot;invalid character in string: `{}`&quot;</span>,
c.escape_default().collect::&lt;String&gt;()
)<span class="question-mark">?</span>,
ErrorKind::InvalidEscape(c) =&gt; <span class="macro">write!</span>(
f,
<span class="string">&quot;invalid escape character in string: `{}`&quot;</span>,
c.escape_default().collect::&lt;String&gt;()
)<span class="question-mark">?</span>,
ErrorKind::InvalidHexEscape(c) =&gt; <span class="macro">write!</span>(
f,
<span class="string">&quot;invalid hex escape character in string: `{}`&quot;</span>,
c.escape_default().collect::&lt;String&gt;()
)<span class="question-mark">?</span>,
ErrorKind::InvalidEscapeValue(c) =&gt; <span class="macro">write!</span>(f, <span class="string">&quot;invalid escape value: `{}`&quot;</span>, c)<span class="question-mark">?</span>,
ErrorKind::NewlineInString =&gt; <span class="string">&quot;newline in string found&quot;</span>.fmt(f)<span class="question-mark">?</span>,
ErrorKind::Unexpected(ch) =&gt; <span class="macro">write!</span>(
f,
<span class="string">&quot;unexpected character found: `{}`&quot;</span>,
ch.escape_default().collect::&lt;String&gt;()
)<span class="question-mark">?</span>,
ErrorKind::UnterminatedString =&gt; <span class="string">&quot;unterminated string&quot;</span>.fmt(f)<span class="question-mark">?</span>,
ErrorKind::NewlineInTableKey =&gt; <span class="string">&quot;found newline in table key&quot;</span>.fmt(f)<span class="question-mark">?</span>,
ErrorKind::Wanted { expected, found } =&gt; {
<span class="macro">write!</span>(f, <span class="string">&quot;expected {}, found {}&quot;</span>, expected, found)<span class="question-mark">?
</span>}
ErrorKind::NumberInvalid =&gt; <span class="string">&quot;invalid number&quot;</span>.fmt(f)<span class="question-mark">?</span>,
ErrorKind::DateInvalid =&gt; <span class="string">&quot;invalid date&quot;</span>.fmt(f)<span class="question-mark">?</span>,
ErrorKind::DuplicateTable(<span class="kw-2">ref </span>s) =&gt; {
<span class="macro">write!</span>(f, <span class="string">&quot;redefinition of table `{}`&quot;</span>, s)<span class="question-mark">?</span>;
}
ErrorKind::RedefineAsArray =&gt; <span class="string">&quot;table redefined as array&quot;</span>.fmt(f)<span class="question-mark">?</span>,
ErrorKind::EmptyTableKey =&gt; <span class="string">&quot;empty table key found&quot;</span>.fmt(f)<span class="question-mark">?</span>,
ErrorKind::MultilineStringKey =&gt; <span class="string">&quot;multiline strings are not allowed for key&quot;</span>.fmt(f)<span class="question-mark">?</span>,
ErrorKind::Custom =&gt; <span class="self">self</span>.inner.message.fmt(f)<span class="question-mark">?</span>,
ErrorKind::ExpectedTuple(l) =&gt; <span class="macro">write!</span>(f, <span class="string">&quot;expected table with length {}&quot;</span>, l)<span class="question-mark">?</span>,
ErrorKind::ExpectedTupleIndex {
expected,
<span class="kw-2">ref </span>found,
} =&gt; <span class="macro">write!</span>(f, <span class="string">&quot;expected table key `{}`, but was `{}`&quot;</span>, expected, found)<span class="question-mark">?</span>,
ErrorKind::ExpectedEmptyTable =&gt; <span class="string">&quot;expected empty table&quot;</span>.fmt(f)<span class="question-mark">?</span>,
ErrorKind::DottedKeyInvalidType =&gt; {
<span class="string">&quot;dotted key attempted to extend non-table type&quot;</span>.fmt(f)<span class="question-mark">?
</span>}
ErrorKind::UnexpectedKeys {
<span class="kw-2">ref </span>keys,
available,
} =&gt; <span class="macro">write!</span>(
f,
<span class="string">&quot;unexpected keys in table: `{:?}`, available keys: `{:?}`&quot;</span>,
keys, available
)<span class="question-mark">?</span>,
ErrorKind::UnquotedString =&gt; <span class="macro">write!</span>(
f,
<span class="string">&quot;invalid TOML value, did you mean to use a quoted string?&quot;
</span>)<span class="question-mark">?</span>,
}
<span class="kw">if </span>!<span class="self">self</span>.inner.key.is_empty() {
<span class="macro">write!</span>(f, <span class="string">&quot; for key `&quot;</span>)<span class="question-mark">?</span>;
<span class="kw">for </span>(i, k) <span class="kw">in </span><span class="self">self</span>.inner.key.iter().enumerate() {
<span class="kw">if </span>i &gt; <span class="number">0 </span>{
<span class="macro">write!</span>(f, <span class="string">&quot;.&quot;</span>)<span class="question-mark">?</span>;
}
<span class="macro">write!</span>(f, <span class="string">&quot;{}&quot;</span>, k)<span class="question-mark">?</span>;
}
<span class="macro">write!</span>(f, <span class="string">&quot;`&quot;</span>)<span class="question-mark">?</span>;
}
<span class="kw">if let </span><span class="prelude-val">Some</span>(line) = <span class="self">self</span>.inner.line {
<span class="macro">write!</span>(f, <span class="string">&quot; at line {} column {}&quot;</span>, line + <span class="number">1</span>, <span class="self">self</span>.inner.col + <span class="number">1</span>)<span class="question-mark">?</span>;
}
<span class="prelude-val">Ok</span>(())
}
}
<span class="kw">impl </span>error::Error <span class="kw">for </span>Error {}
<span class="kw">impl </span>de::Error <span class="kw">for </span>Error {
<span class="kw">fn </span>custom&lt;T: fmt::Display&gt;(msg: T) -&gt; Error {
Error::custom(<span class="prelude-val">None</span>, msg.to_string())
}
}
<span class="kw">enum </span>Line&lt;<span class="lifetime">&#39;a</span>&gt; {
Table {
at: usize,
header: Header&lt;<span class="lifetime">&#39;a</span>&gt;,
array: bool,
},
KeyValue(Vec&lt;(Span, Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;)&gt;, Value&lt;<span class="lifetime">&#39;a</span>&gt;),
}
<span class="kw">struct </span>Header&lt;<span class="lifetime">&#39;a</span>&gt; {
first: bool,
array: bool,
require_newline_after_table: bool,
tokens: Tokenizer&lt;<span class="lifetime">&#39;a</span>&gt;,
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; Header&lt;<span class="lifetime">&#39;a</span>&gt; {
<span class="kw">fn </span>new(tokens: Tokenizer&lt;<span class="lifetime">&#39;a</span>&gt;, array: bool, require_newline_after_table: bool) -&gt; Header&lt;<span class="lifetime">&#39;a</span>&gt; {
Header {
first: <span class="bool-val">true</span>,
array,
tokens,
require_newline_after_table,
}
}
<span class="kw">fn </span>next(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;(Span, Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;)&gt;, TokenError&gt; {
<span class="self">self</span>.tokens.eat_whitespace()<span class="question-mark">?</span>;
<span class="kw">if </span><span class="self">self</span>.first || <span class="self">self</span>.tokens.eat(Token::Period)<span class="question-mark">? </span>{
<span class="self">self</span>.first = <span class="bool-val">false</span>;
<span class="self">self</span>.tokens.eat_whitespace()<span class="question-mark">?</span>;
<span class="self">self</span>.tokens.table_key().map(<span class="prelude-val">Some</span>)
} <span class="kw">else </span>{
<span class="self">self</span>.tokens.expect(Token::RightBracket)<span class="question-mark">?</span>;
<span class="kw">if </span><span class="self">self</span>.array {
<span class="self">self</span>.tokens.expect(Token::RightBracket)<span class="question-mark">?</span>;
}
<span class="self">self</span>.tokens.eat_whitespace()<span class="question-mark">?</span>;
<span class="kw">if </span><span class="self">self</span>.require_newline_after_table &amp;&amp; !<span class="self">self</span>.tokens.eat_comment()<span class="question-mark">? </span>{
<span class="self">self</span>.tokens.eat_newline_or_eof()<span class="question-mark">?</span>;
}
<span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>)
}
}
}
<span class="attribute">#[derive(Debug)]
</span><span class="kw">struct </span>Value&lt;<span class="lifetime">&#39;a</span>&gt; {
e: E&lt;<span class="lifetime">&#39;a</span>&gt;,
start: usize,
end: usize,
}
<span class="attribute">#[derive(Debug)]
</span><span class="kw">enum </span>E&lt;<span class="lifetime">&#39;a</span>&gt; {
Integer(i64),
Float(f64),
Boolean(bool),
String(Cow&lt;<span class="lifetime">&#39;a</span>, str&gt;),
Datetime(<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>str),
Array(Vec&lt;Value&lt;<span class="lifetime">&#39;a</span>&gt;&gt;),
InlineTable(Vec&lt;TablePair&lt;<span class="lifetime">&#39;a</span>&gt;&gt;),
DottedTable(Vec&lt;TablePair&lt;<span class="lifetime">&#39;a</span>&gt;&gt;),
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>&gt; E&lt;<span class="lifetime">&#39;a</span>&gt; {
<span class="kw">fn </span>type_name(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="kw-2">&amp;</span><span class="lifetime">&#39;static </span>str {
<span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{
E::String(..) =&gt; <span class="string">&quot;string&quot;</span>,
E::Integer(..) =&gt; <span class="string">&quot;integer&quot;</span>,
E::Float(..) =&gt; <span class="string">&quot;float&quot;</span>,
E::Boolean(..) =&gt; <span class="string">&quot;boolean&quot;</span>,
E::Datetime(..) =&gt; <span class="string">&quot;datetime&quot;</span>,
E::Array(..) =&gt; <span class="string">&quot;array&quot;</span>,
E::InlineTable(..) =&gt; <span class="string">&quot;inline table&quot;</span>,
E::DottedTable(..) =&gt; <span class="string">&quot;dotted table&quot;</span>,
}
}
}
</code></pre></div>
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