| <!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/serde_json-1.0.96/src/error.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>error.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="../../serde_json/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="../../serde_json/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">//! When serializing or deserializing JSON goes wrong. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::io; |
| <span class="kw">use </span>alloc::boxed::Box; |
| <span class="kw">use </span>alloc::string::{String, ToString}; |
| <span class="kw">use </span>core::fmt::{<span class="self">self</span>, Debug, Display}; |
| <span class="kw">use </span>core::result; |
| <span class="kw">use </span>core::str::FromStr; |
| <span class="kw">use </span>serde::{de, ser}; |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| </span><span class="kw">use </span>std::error; |
| |
| <span class="doccomment">/// This type represents all possible errors that can occur when serializing or |
| /// deserializing JSON data. |
| </span><span class="kw">pub struct </span>Error { |
| <span class="doccomment">/// This `Box` allows us to keep the size of `Error` as small as possible. A |
| /// larger `Error` type was substantially slower due to all the functions |
| /// that pass around `Result<T, Error>`. |
| </span>err: Box<ErrorImpl>, |
| } |
| |
| <span class="doccomment">/// Alias for a `Result` with the error type `serde_json::Error`. |
| </span><span class="kw">pub type </span><span class="prelude-ty">Result</span><T> = result::Result<T, Error>; |
| |
| <span class="kw">impl </span>Error { |
| <span class="doccomment">/// One-based line number at which the error was detected. |
| /// |
| /// Characters in the first line of the input (before the first newline |
| /// character) are in line 1. |
| </span><span class="kw">pub fn </span>line(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.err.line |
| } |
| |
| <span class="doccomment">/// One-based column number at which the error was detected. |
| /// |
| /// The first character in the input and any characters immediately |
| /// following a newline character are in column 1. |
| /// |
| /// Note that errors may occur in column 0, for example if a read from an IO |
| /// stream fails immediately following a previously read newline character. |
| </span><span class="kw">pub fn </span>column(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.err.column |
| } |
| |
| <span class="doccomment">/// Categorizes the cause of this error. |
| /// |
| /// - `Category::Io` - failure to read or write bytes on an IO stream |
| /// - `Category::Syntax` - input that is not syntactically valid JSON |
| /// - `Category::Data` - input data that is semantically incorrect |
| /// - `Category::Eof` - unexpected end of the input data |
| </span><span class="kw">pub fn </span>classify(<span class="kw-2">&</span><span class="self">self</span>) -> Category { |
| <span class="kw">match </span><span class="self">self</span>.err.code { |
| ErrorCode::Message(<span class="kw">_</span>) => Category::Data, |
| ErrorCode::Io(<span class="kw">_</span>) => Category::Io, |
| ErrorCode::EofWhileParsingList |
| | ErrorCode::EofWhileParsingObject |
| | ErrorCode::EofWhileParsingString |
| | ErrorCode::EofWhileParsingValue => Category::Eof, |
| ErrorCode::ExpectedColon |
| | ErrorCode::ExpectedListCommaOrEnd |
| | ErrorCode::ExpectedObjectCommaOrEnd |
| | ErrorCode::ExpectedSomeIdent |
| | ErrorCode::ExpectedSomeValue |
| | ErrorCode::InvalidEscape |
| | ErrorCode::InvalidNumber |
| | ErrorCode::NumberOutOfRange |
| | ErrorCode::InvalidUnicodeCodePoint |
| | ErrorCode::ControlCharacterWhileParsingString |
| | ErrorCode::KeyMustBeAString |
| | ErrorCode::LoneLeadingSurrogateInHexEscape |
| | ErrorCode::TrailingComma |
| | ErrorCode::TrailingCharacters |
| | ErrorCode::UnexpectedEndOfHexEscape |
| | ErrorCode::RecursionLimitExceeded => Category::Syntax, |
| } |
| } |
| |
| <span class="doccomment">/// Returns true if this error was caused by a failure to read or write |
| /// bytes on an IO stream. |
| </span><span class="kw">pub fn </span>is_io(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.classify() == Category::Io |
| } |
| |
| <span class="doccomment">/// Returns true if this error was caused by input that was not |
| /// syntactically valid JSON. |
| </span><span class="kw">pub fn </span>is_syntax(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.classify() == Category::Syntax |
| } |
| |
| <span class="doccomment">/// Returns true if this error was caused by input data that was |
| /// semantically incorrect. |
| /// |
| /// For example, JSON containing a number is semantically incorrect when the |
| /// type being deserialized into holds a String. |
| </span><span class="kw">pub fn </span>is_data(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.classify() == Category::Data |
| } |
| |
| <span class="doccomment">/// Returns true if this error was caused by prematurely reaching the end of |
| /// the input data. |
| /// |
| /// Callers that process streaming input may be interested in retrying the |
| /// deserialization once more data is available. |
| </span><span class="kw">pub fn </span>is_eof(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.classify() == Category::Eof |
| } |
| } |
| |
| <span class="doccomment">/// Categorizes the cause of a `serde_json::Error`. |
| </span><span class="attribute">#[derive(Copy, Clone, PartialEq, Eq, Debug)] |
| </span><span class="kw">pub enum </span>Category { |
| <span class="doccomment">/// The error was caused by a failure to read or write bytes on an IO |
| /// stream. |
| </span>Io, |
| |
| <span class="doccomment">/// The error was caused by input that was not syntactically valid JSON. |
| </span>Syntax, |
| |
| <span class="doccomment">/// The error was caused by input data that was semantically incorrect. |
| /// |
| /// For example, JSON containing a number is semantically incorrect when the |
| /// type being deserialized into holds a String. |
| </span>Data, |
| |
| <span class="doccomment">/// The error was caused by prematurely reaching the end of the input data. |
| /// |
| /// Callers that process streaming input may be interested in retrying the |
| /// deserialization once more data is available. |
| </span>Eof, |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| #[allow(clippy::fallible_impl_from)] |
| </span><span class="kw">impl </span>From<Error> <span class="kw">for </span>io::Error { |
| <span class="doccomment">/// Convert a `serde_json::Error` into an `io::Error`. |
| /// |
| /// JSON syntax and data errors are turned into `InvalidData` IO errors. |
| /// EOF errors are turned into `UnexpectedEof` IO errors. |
| /// |
| /// ``` |
| /// use std::io; |
| /// |
| /// enum MyError { |
| /// Io(io::Error), |
| /// Json(serde_json::Error), |
| /// } |
| /// |
| /// impl From<serde_json::Error> for MyError { |
| /// fn from(err: serde_json::Error) -> MyError { |
| /// use serde_json::error::Category; |
| /// match err.classify() { |
| /// Category::Io => { |
| /// MyError::Io(err.into()) |
| /// } |
| /// Category::Syntax | Category::Data | Category::Eof => { |
| /// MyError::Json(err) |
| /// } |
| /// } |
| /// } |
| /// } |
| /// ``` |
| </span><span class="kw">fn </span>from(j: Error) -> <span class="self">Self </span>{ |
| <span class="kw">if let </span>ErrorCode::Io(err) = j.err.code { |
| err |
| } <span class="kw">else </span>{ |
| <span class="kw">match </span>j.classify() { |
| Category::Io => <span class="macro">unreachable!</span>(), |
| Category::Syntax | Category::Data => io::Error::new(io::ErrorKind::InvalidData, j), |
| Category::Eof => io::Error::new(io::ErrorKind::UnexpectedEof, j), |
| } |
| } |
| } |
| } |
| |
| <span class="kw">struct </span>ErrorImpl { |
| code: ErrorCode, |
| line: usize, |
| column: usize, |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum </span>ErrorCode { |
| <span class="doccomment">/// Catchall for syntax error messages |
| </span>Message(Box<str>), |
| |
| <span class="doccomment">/// Some IO error occurred while serializing or deserializing. |
| </span>Io(io::Error), |
| |
| <span class="doccomment">/// EOF while parsing a list. |
| </span>EofWhileParsingList, |
| |
| <span class="doccomment">/// EOF while parsing an object. |
| </span>EofWhileParsingObject, |
| |
| <span class="doccomment">/// EOF while parsing a string. |
| </span>EofWhileParsingString, |
| |
| <span class="doccomment">/// EOF while parsing a JSON value. |
| </span>EofWhileParsingValue, |
| |
| <span class="doccomment">/// Expected this character to be a `':'`. |
| </span>ExpectedColon, |
| |
| <span class="doccomment">/// Expected this character to be either a `','` or a `']'`. |
| </span>ExpectedListCommaOrEnd, |
| |
| <span class="doccomment">/// Expected this character to be either a `','` or a `'}'`. |
| </span>ExpectedObjectCommaOrEnd, |
| |
| <span class="doccomment">/// Expected to parse either a `true`, `false`, or a `null`. |
| </span>ExpectedSomeIdent, |
| |
| <span class="doccomment">/// Expected this character to start a JSON value. |
| </span>ExpectedSomeValue, |
| |
| <span class="doccomment">/// Invalid hex escape code. |
| </span>InvalidEscape, |
| |
| <span class="doccomment">/// Invalid number. |
| </span>InvalidNumber, |
| |
| <span class="doccomment">/// Number is bigger than the maximum value of its type. |
| </span>NumberOutOfRange, |
| |
| <span class="doccomment">/// Invalid unicode code point. |
| </span>InvalidUnicodeCodePoint, |
| |
| <span class="doccomment">/// Control character found while parsing a string. |
| </span>ControlCharacterWhileParsingString, |
| |
| <span class="doccomment">/// Object key is not a string. |
| </span>KeyMustBeAString, |
| |
| <span class="doccomment">/// Lone leading surrogate in hex escape. |
| </span>LoneLeadingSurrogateInHexEscape, |
| |
| <span class="doccomment">/// JSON has a comma after the last value in an array or map. |
| </span>TrailingComma, |
| |
| <span class="doccomment">/// JSON has non-whitespace trailing characters after the value. |
| </span>TrailingCharacters, |
| |
| <span class="doccomment">/// Unexpected end of hex escape. |
| </span>UnexpectedEndOfHexEscape, |
| |
| <span class="doccomment">/// Encountered nesting of JSON maps and arrays more than 128 layers deep. |
| </span>RecursionLimitExceeded, |
| } |
| |
| <span class="kw">impl </span>Error { |
| <span class="attribute">#[cold] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>syntax(code: ErrorCode, line: usize, column: usize) -> <span class="self">Self </span>{ |
| Error { |
| err: Box::new(ErrorImpl { code, line, column }), |
| } |
| } |
| |
| <span class="comment">// Not public API. Should be pub(crate). |
| // |
| // Update `eager_json` crate when this function changes. |
| </span><span class="attribute">#[doc(hidden)] |
| #[cold] |
| </span><span class="kw">pub fn </span>io(error: io::Error) -> <span class="self">Self </span>{ |
| Error { |
| err: Box::new(ErrorImpl { |
| code: ErrorCode::Io(error), |
| line: <span class="number">0</span>, |
| column: <span class="number">0</span>, |
| }), |
| } |
| } |
| |
| <span class="attribute">#[cold] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>fix_position<F>(<span class="self">self</span>, f: F) -> <span class="self">Self |
| </span><span class="kw">where |
| </span>F: FnOnce(ErrorCode) -> Error, |
| { |
| <span class="kw">if </span><span class="self">self</span>.err.line == <span class="number">0 </span>{ |
| f(<span class="self">self</span>.err.code) |
| } <span class="kw">else </span>{ |
| <span class="self">self |
| </span>} |
| } |
| } |
| |
| <span class="kw">impl </span>Display <span class="kw">for </span>ErrorCode { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| <span class="kw">match </span><span class="self">self </span>{ |
| ErrorCode::Message(msg) => f.write_str(msg), |
| ErrorCode::Io(err) => Display::fmt(err, f), |
| ErrorCode::EofWhileParsingList => f.write_str(<span class="string">"EOF while parsing a list"</span>), |
| ErrorCode::EofWhileParsingObject => f.write_str(<span class="string">"EOF while parsing an object"</span>), |
| ErrorCode::EofWhileParsingString => f.write_str(<span class="string">"EOF while parsing a string"</span>), |
| ErrorCode::EofWhileParsingValue => f.write_str(<span class="string">"EOF while parsing a value"</span>), |
| ErrorCode::ExpectedColon => f.write_str(<span class="string">"expected `:`"</span>), |
| ErrorCode::ExpectedListCommaOrEnd => f.write_str(<span class="string">"expected `,` or `]`"</span>), |
| ErrorCode::ExpectedObjectCommaOrEnd => f.write_str(<span class="string">"expected `,` or `}`"</span>), |
| ErrorCode::ExpectedSomeIdent => f.write_str(<span class="string">"expected ident"</span>), |
| ErrorCode::ExpectedSomeValue => f.write_str(<span class="string">"expected value"</span>), |
| ErrorCode::InvalidEscape => f.write_str(<span class="string">"invalid escape"</span>), |
| ErrorCode::InvalidNumber => f.write_str(<span class="string">"invalid number"</span>), |
| ErrorCode::NumberOutOfRange => f.write_str(<span class="string">"number out of range"</span>), |
| ErrorCode::InvalidUnicodeCodePoint => f.write_str(<span class="string">"invalid unicode code point"</span>), |
| ErrorCode::ControlCharacterWhileParsingString => { |
| f.write_str(<span class="string">"control character (\\u0000-\\u001F) found while parsing a string"</span>) |
| } |
| ErrorCode::KeyMustBeAString => f.write_str(<span class="string">"key must be a string"</span>), |
| ErrorCode::LoneLeadingSurrogateInHexEscape => { |
| f.write_str(<span class="string">"lone leading surrogate in hex escape"</span>) |
| } |
| ErrorCode::TrailingComma => f.write_str(<span class="string">"trailing comma"</span>), |
| ErrorCode::TrailingCharacters => f.write_str(<span class="string">"trailing characters"</span>), |
| ErrorCode::UnexpectedEndOfHexEscape => f.write_str(<span class="string">"unexpected end of hex escape"</span>), |
| ErrorCode::RecursionLimitExceeded => f.write_str(<span class="string">"recursion limit exceeded"</span>), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>serde::de::StdError <span class="kw">for </span>Error { |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| </span><span class="kw">fn </span>source(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>(<span class="kw">dyn </span>error::Error + <span class="lifetime">'static</span>)> { |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.err.code { |
| ErrorCode::Io(err) => err.source(), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Display <span class="kw">for </span>Error { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| Display::fmt(<span class="kw-2">&*</span><span class="self">self</span>.err, f) |
| } |
| } |
| |
| <span class="kw">impl </span>Display <span class="kw">for </span>ErrorImpl { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| <span class="kw">if </span><span class="self">self</span>.line == <span class="number">0 </span>{ |
| Display::fmt(<span class="kw-2">&</span><span class="self">self</span>.code, f) |
| } <span class="kw">else </span>{ |
| <span class="macro">write!</span>( |
| f, |
| <span class="string">"{} at line {} column {}"</span>, |
| <span class="self">self</span>.code, <span class="self">self</span>.line, <span class="self">self</span>.column |
| ) |
| } |
| } |
| } |
| |
| <span class="comment">// Remove two layers of verbosity from the debug representation. Humans often |
| // end up seeing this representation because it is what unwrap() shows. |
| </span><span class="kw">impl </span>Debug <span class="kw">for </span>Error { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| <span class="macro">write!</span>( |
| f, |
| <span class="string">"Error({:?}, line: {}, column: {})"</span>, |
| <span class="self">self</span>.err.code.to_string(), |
| <span class="self">self</span>.err.line, |
| <span class="self">self</span>.err.column |
| ) |
| } |
| } |
| |
| <span class="kw">impl </span>de::Error <span class="kw">for </span>Error { |
| <span class="attribute">#[cold] |
| </span><span class="kw">fn </span>custom<T: Display>(msg: T) -> Error { |
| make_error(msg.to_string()) |
| } |
| |
| <span class="attribute">#[cold] |
| </span><span class="kw">fn </span>invalid_type(unexp: de::Unexpected, exp: <span class="kw-2">&</span><span class="kw">dyn </span>de::Expected) -> <span class="self">Self </span>{ |
| <span class="kw">if let </span>de::Unexpected::Unit = unexp { |
| Error::custom(<span class="macro">format_args!</span>(<span class="string">"invalid type: null, expected {}"</span>, exp)) |
| } <span class="kw">else </span>{ |
| Error::custom(<span class="macro">format_args!</span>(<span class="string">"invalid type: {}, expected {}"</span>, unexp, exp)) |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>ser::Error <span class="kw">for </span>Error { |
| <span class="attribute">#[cold] |
| </span><span class="kw">fn </span>custom<T: Display>(msg: T) -> Error { |
| make_error(msg.to_string()) |
| } |
| } |
| |
| <span class="comment">// Parse our own error message that looks like "{} at line {} column {}" to work |
| // around erased-serde round-tripping the error through de::Error::custom. |
| </span><span class="kw">fn </span>make_error(<span class="kw-2">mut </span>msg: String) -> Error { |
| <span class="kw">let </span>(line, column) = parse_line_col(<span class="kw-2">&mut </span>msg).unwrap_or((<span class="number">0</span>, <span class="number">0</span>)); |
| Error { |
| err: Box::new(ErrorImpl { |
| code: ErrorCode::Message(msg.into_boxed_str()), |
| line, |
| column, |
| }), |
| } |
| } |
| |
| <span class="kw">fn </span>parse_line_col(msg: <span class="kw-2">&mut </span>String) -> <span class="prelude-ty">Option</span><(usize, usize)> { |
| <span class="kw">let </span>start_of_suffix = <span class="kw">match </span>msg.rfind(<span class="string">" at line "</span>) { |
| <span class="prelude-val">Some</span>(index) => index, |
| <span class="prelude-val">None </span>=> <span class="kw">return </span><span class="prelude-val">None</span>, |
| }; |
| |
| <span class="comment">// Find start and end of line number. |
| </span><span class="kw">let </span>start_of_line = start_of_suffix + <span class="string">" at line "</span>.len(); |
| <span class="kw">let </span><span class="kw-2">mut </span>end_of_line = start_of_line; |
| <span class="kw">while </span>starts_with_digit(<span class="kw-2">&</span>msg[end_of_line..]) { |
| end_of_line += <span class="number">1</span>; |
| } |
| |
| <span class="kw">if </span>!msg[end_of_line..].starts_with(<span class="string">" column "</span>) { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="comment">// Find start and end of column number. |
| </span><span class="kw">let </span>start_of_column = end_of_line + <span class="string">" column "</span>.len(); |
| <span class="kw">let </span><span class="kw-2">mut </span>end_of_column = start_of_column; |
| <span class="kw">while </span>starts_with_digit(<span class="kw-2">&</span>msg[end_of_column..]) { |
| end_of_column += <span class="number">1</span>; |
| } |
| |
| <span class="kw">if </span>end_of_column < msg.len() { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="comment">// Parse numbers. |
| </span><span class="kw">let </span>line = <span class="kw">match </span>usize::from_str(<span class="kw-2">&</span>msg[start_of_line..end_of_line]) { |
| <span class="prelude-val">Ok</span>(line) => line, |
| <span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="kw">return </span><span class="prelude-val">None</span>, |
| }; |
| <span class="kw">let </span>column = <span class="kw">match </span>usize::from_str(<span class="kw-2">&</span>msg[start_of_column..end_of_column]) { |
| <span class="prelude-val">Ok</span>(column) => column, |
| <span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="kw">return </span><span class="prelude-val">None</span>, |
| }; |
| |
| msg.truncate(start_of_suffix); |
| <span class="prelude-val">Some</span>((line, column)) |
| } |
| |
| <span class="kw">fn </span>starts_with_digit(slice: <span class="kw-2">&</span>str) -> bool { |
| <span class="kw">match </span>slice.as_bytes().first() { |
| <span class="prelude-val">None </span>=> <span class="bool-val">false</span>, |
| <span class="prelude-val">Some</span>(<span class="kw-2">&</span>byte) => byte >= <span class="string">b'0' </span>&& byte <= <span class="string">b'9'</span>, |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="serde_json" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |