| <!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/combine-4.6.6/src/parser/repeat.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>repeat.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="../../../combine/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="../../../combine/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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| <span id="1589">1589</span> |
| <span id="1590">1590</span> |
| <span id="1591">1591</span> |
| <span id="1592">1592</span> |
| <span id="1593">1593</span> |
| <span id="1594">1594</span> |
| <span id="1595">1595</span> |
| <span id="1596">1596</span> |
| <span id="1597">1597</span> |
| <span id="1598">1598</span> |
| <span id="1599">1599</span> |
| <span id="1600">1600</span> |
| <span id="1601">1601</span> |
| <span id="1602">1602</span> |
| <span id="1603">1603</span> |
| <span id="1604">1604</span> |
| <span id="1605">1605</span> |
| <span id="1606">1606</span> |
| <span id="1607">1607</span> |
| <span id="1608">1608</span> |
| <span id="1609">1609</span> |
| <span id="1610">1610</span> |
| <span id="1611">1611</span> |
| <span id="1612">1612</span> |
| <span id="1613">1613</span> |
| <span id="1614">1614</span> |
| <span id="1615">1615</span> |
| <span id="1616">1616</span> |
| <span id="1617">1617</span> |
| <span id="1618">1618</span> |
| <span id="1619">1619</span> |
| <span id="1620">1620</span> |
| </pre><pre class="rust"><code><span class="doccomment">//! Combinators which take one or more parsers and applies them repeatedly. |
| |
| </span><span class="kw">use crate</span>::{ |
| error::{ |
| Commit, ParseError, |
| ParseResult::{<span class="self">self</span>, <span class="kw-2">*</span>}, |
| ResultExt, StdParseResult, StreamError, Tracked, |
| }, |
| lib::{borrow::BorrowMut, cmp, marker::PhantomData, mem}, |
| parser::{ |
| choice::{optional, Optional, Or}, |
| combinator::{ignore, Ignore}, |
| function::{parser, FnParser}, |
| sequence::With, |
| token::{value, Value}, |
| FirstMode, ParseMode, |
| }, |
| stream::{uncons, Stream, StreamOnce}, |
| ErrorOffset, Parser, |
| }; |
| |
| <span class="macro">parser! </span>{ |
| <span class="kw">pub struct </span>Count; |
| |
| <span class="doccomment">/// Parses `parser` from zero up to `count` times. |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::error::Info; |
| /// # use combine::stream::easy::Error; |
| /// # fn main() { |
| /// let mut parser = count(2, token(b'a')); |
| /// |
| /// let result = parser.parse(&b"aaab"[..]); |
| /// assert_eq!(result, Ok((b"aa"[..].to_owned(), &b"ab"[..]))); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>count[F, Input, P](count: usize, parser: P)(Input) -> F |
| <span class="kw">where </span>[ |
| Input: Stream, |
| P: Parser<Input>, |
| F: Extend<P::Output> + Default, |
| ] |
| { |
| count_min_max(<span class="number">0</span>, <span class="kw-2">*</span>count, parser) |
| } |
| } |
| |
| <span class="macro">parser! </span>{ |
| <span class="kw">pub struct </span>SkipCount; |
| <span class="kw">type </span>PartialState = <With<Count<Sink, Input, P>, Value<Input, ()>> <span class="kw">as </span>Parser<Input>>::PartialState; |
| <span class="doccomment">/// Parses `parser` from zero up to `count` times skipping the output of `parser`. |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::stream::easy::{Error, Info}; |
| /// # fn main() { |
| /// let mut parser = skip_count(2, token(b'a')); |
| /// |
| /// let result = parser.parse(&b"aaab"[..]); |
| /// assert_eq!(result, Ok(((), &b"ab"[..]))); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>skip_count[Input, P](count: usize, parser: P)(Input) -> () |
| <span class="kw">where </span>[ |
| P: Parser<Input> |
| ] |
| { |
| <span class="self">self</span>::count::<Sink, <span class="kw">_</span>, <span class="kw">_</span>>(<span class="kw-2">*</span>count, parser.map(|<span class="kw">_</span>| ())).with(value(())) |
| } |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>CountMinMax<F, P> { |
| parser: P, |
| min: usize, |
| max: usize, |
| _marker: PhantomData<<span class="kw">fn</span>() -> F>, |
| } |
| |
| <span class="kw">struct </span>SuggestSizeHint<I> { |
| iterator: I, |
| min: usize, |
| max: <span class="prelude-ty">Option</span><usize>, |
| } |
| |
| <span class="kw">impl</span><I> Iterator <span class="kw">for </span>SuggestSizeHint<I> |
| <span class="kw">where |
| </span>I: Iterator, |
| { |
| <span class="kw">type </span>Item = I::Item; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>::Item> { |
| <span class="self">self</span>.iterator.next() |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> (usize, <span class="prelude-ty">Option</span><usize>) { |
| (<span class="self">self</span>.min, <span class="self">self</span>.max) |
| } |
| } |
| |
| <span class="kw">fn </span>suggest_size_hint<I>(iterator: I, (min, max): (usize, <span class="prelude-ty">Option</span><usize>)) -> SuggestSizeHint<I> |
| <span class="kw">where |
| </span>I: Iterator, |
| { |
| SuggestSizeHint { |
| iterator, |
| <span class="comment">// Invalid input may report an extreme size so we guard against that (while still |
| // optimizing by preallocating for the expected case of success) |
| </span>min: cmp::min(min, <span class="number">4096</span>), |
| max, |
| } |
| } |
| |
| <span class="kw">impl</span><Input, P, F> Parser<Input> <span class="kw">for </span>CountMinMax<F, P> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| F: Extend<P::Output> + Default, |
| { |
| <span class="kw">type </span>Output = F; |
| <span class="kw">type </span>PartialState = (usize, F, P::PartialState); |
| |
| <span class="macro">parse_mode!</span>(Input); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| mode: M, |
| input: <span class="kw-2">&mut </span>Input, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<<span class="self">Self</span>::Output, Input::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| <span class="kw">let </span>(count, elements, child_state) = state; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>iter = <span class="self">self</span>.parser.by_ref().partial_iter(mode, input, child_state); |
| <span class="kw">let </span>remaining_min = <span class="self">self</span>.min.saturating_sub(<span class="kw-2">*</span>count); |
| <span class="kw">let </span>remaining_max = <span class="self">self</span>.max - <span class="kw-2">*</span>count; |
| elements.extend(suggest_size_hint( |
| iter.by_ref().take(remaining_max).inspect(|<span class="kw">_</span>| <span class="kw-2">*</span>count += <span class="number">1</span>), |
| (remaining_min, <span class="prelude-val">Some</span>(remaining_max)), |
| )); |
| <span class="kw">if </span><span class="kw-2">*</span>count < <span class="self">self</span>.min { |
| <span class="kw">let </span>err = StreamError::message_format(<span class="macro">format_args!</span>( |
| <span class="string">"expected {} more elements"</span>, |
| <span class="self">self</span>.min - <span class="kw-2">*</span>count |
| )); |
| iter.fail(err) |
| } <span class="kw">else </span>{ |
| iter.into_result_fast(elements).map(|x| { |
| <span class="kw-2">*</span>count = <span class="number">0</span>; |
| x |
| }) |
| } |
| } |
| |
| <span class="kw">fn </span>add_error(<span class="kw-2">&mut </span><span class="self">self</span>, error: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="self">self</span>.parser.add_error(error) |
| } |
| } |
| |
| <span class="doccomment">/// Parses `parser` from `min` to `max` times (including `min` and `max`). |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::stream::easy::{Error, Info}; |
| /// # fn main() { |
| /// let mut parser = count_min_max(2, 2, token(b'a')); |
| /// |
| /// let result = parser.parse(&b"aaab"[..]); |
| /// assert_eq!(result, Ok((b"aa"[..].to_owned(), &b"ab"[..]))); |
| /// let result = parser.parse(&b"ab"[..]); |
| /// assert!(result.is_err()); |
| /// # } |
| /// ``` |
| /// |
| /// # Panics |
| /// |
| /// If `min` > `max`. |
| </span><span class="kw">pub fn </span>count_min_max<F, Input, P>(min: usize, max: usize, parser: P) -> CountMinMax<F, P> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| F: Extend<P::Output> + Default, |
| { |
| <span class="macro">assert!</span>(min <= max); |
| |
| CountMinMax { |
| parser, |
| min, |
| max, |
| _marker: PhantomData, |
| } |
| } |
| |
| <span class="macro">parser! </span>{ |
| <span class="kw">pub struct </span>SkipCountMinMax; |
| <span class="kw">type </span>PartialState = <With<CountMinMax<Sink, P>, Value<Input, ()>> <span class="kw">as </span>Parser<Input>>::PartialState; |
| <span class="doccomment">/// Parses `parser` from `min` to `max` times (including `min` and `max`) |
| /// skipping the output of `parser`. |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # fn main() { |
| /// let mut parser = skip_count_min_max(2, 2, token(b'a')); |
| /// |
| /// let result = parser.parse(&b"aaab"[..]); |
| /// assert_eq!(result, Ok(((), &b"ab"[..]))); |
| /// let result = parser.parse(&b"ab"[..]); |
| /// assert!(result.is_err()); |
| /// # } |
| /// ``` |
| /// |
| /// # Panics |
| /// |
| /// If `min` > `max`. |
| </span><span class="kw">pub fn </span>skip_count_min_max[Input, P](min: usize, max: usize, parser: P)(Input) -> () |
| <span class="kw">where </span>[ |
| P: Parser<Input>, |
| ] |
| { |
| count_min_max::<Sink, <span class="kw">_</span>, <span class="kw">_</span>>(<span class="kw-2">*</span>min, <span class="kw-2">*</span>max, parser.map(|<span class="kw">_</span>| ())).with(value(())) |
| } |
| } |
| |
| <span class="kw">pub struct </span>Iter<<span class="lifetime">'a</span>, Input, P, S, M> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| { |
| parser: P, |
| input: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Input, |
| committed: bool, |
| state: State<<Input <span class="kw">as </span>StreamOnce>::Error>, |
| partial_state: S, |
| mode: M, |
| } |
| |
| <span class="kw">enum </span>State<E> { |
| <span class="prelude-val">Ok</span>, |
| PeekErr(E), |
| CommitErr(E), |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, Input, P, S, M> Iter<<span class="lifetime">'a</span>, Input, P, S, M> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| S: BorrowMut<P::PartialState>, |
| { |
| <span class="kw">pub fn </span>new(parser: P, mode: M, input: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Input, partial_state: S) -> <span class="self">Self </span>{ |
| Iter { |
| parser, |
| input, |
| committed: <span class="bool-val">false</span>, |
| state: State::Ok, |
| partial_state, |
| mode, |
| } |
| } |
| <span class="doccomment">/// Converts the iterator to a `ParseResult`, returning `Ok` if the parsing so far has be done |
| /// without any errors which committed data. |
| </span><span class="kw">pub fn </span>into_result<O>(<span class="self">self</span>, value: O) -> StdParseResult<O, Input> { |
| <span class="self">self</span>.into_result_(value).into() |
| } |
| |
| <span class="kw">fn </span>into_result_<O>(<span class="self">self</span>, value: O) -> ParseResult<O, Input::Error> { |
| <span class="kw">match </span><span class="self">self</span>.state { |
| State::Ok | State::PeekErr(<span class="kw">_</span>) => { |
| <span class="kw">if </span><span class="self">self</span>.committed { |
| CommitOk(value) |
| } <span class="kw">else </span>{ |
| PeekOk(value) |
| } |
| } |
| State::CommitErr(e) => CommitErr(e), |
| } |
| } |
| |
| <span class="kw">fn </span>into_result_fast<O>(<span class="self">self</span>, value: <span class="kw-2">&mut </span>O) -> ParseResult<O, Input::Error> |
| <span class="kw">where |
| </span>O: Default, |
| { |
| <span class="kw">match </span><span class="self">self</span>.state { |
| State::Ok | State::PeekErr(<span class="kw">_</span>) => { |
| <span class="kw">let </span>value = mem::take(value); |
| <span class="kw">if </span><span class="self">self</span>.committed { |
| CommitOk(value) |
| } <span class="kw">else </span>{ |
| PeekOk(value) |
| } |
| } |
| State::CommitErr(e) => CommitErr(e), |
| } |
| } |
| |
| <span class="kw">fn </span>fail<T>( |
| <span class="self">self</span>, |
| err: <<Input <span class="kw">as </span>StreamOnce>::Error <span class="kw">as </span>ParseError< |
| <Input <span class="kw">as </span>StreamOnce>::Token, |
| <Input <span class="kw">as </span>StreamOnce>::Range, |
| <Input <span class="kw">as </span>StreamOnce>::Position, |
| >>::StreamError, |
| ) -> ParseResult<T, Input::Error> { |
| <span class="kw">match </span><span class="self">self</span>.state { |
| State::Ok => { |
| <span class="kw">let </span>err = <Input <span class="kw">as </span>StreamOnce>::Error::from_error(<span class="self">self</span>.input.position(), err); |
| <span class="kw">if </span><span class="self">self</span>.committed { |
| CommitErr(err) |
| } <span class="kw">else </span>{ |
| PeekErr(err.into()) |
| } |
| } |
| State::PeekErr(<span class="kw-2">mut </span>e) => { |
| <span class="kw">let </span>err = <Input <span class="kw">as </span>StreamOnce>::Error::from_error(<span class="self">self</span>.input.position(), err); |
| e = e.merge(err); |
| <span class="kw">if </span><span class="self">self</span>.committed { |
| CommitErr(e) |
| } <span class="kw">else </span>{ |
| PeekErr(e.into()) |
| } |
| } |
| State::CommitErr(<span class="kw-2">mut </span>e) => { |
| e.add(err); |
| CommitErr(e) |
| } |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, Input, P, S, M> Iterator <span class="kw">for </span>Iter<<span class="lifetime">'a</span>, Input, P, S, M> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| S: BorrowMut<P::PartialState>, |
| M: ParseMode, |
| { |
| <span class="kw">type </span>Item = P::Output; |
| |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><P::Output> { |
| <span class="kw">let </span>before = <span class="self">self</span>.input.checkpoint(); |
| <span class="kw">match </span><span class="self">self |
| </span>.parser |
| .parse_mode(<span class="self">self</span>.mode, <span class="self">self</span>.input, <span class="self">self</span>.partial_state.borrow_mut()) |
| { |
| PeekOk(v) => { |
| <span class="self">self</span>.mode.set_first(); |
| <span class="prelude-val">Some</span>(v) |
| } |
| CommitOk(v) => { |
| <span class="self">self</span>.mode.set_first(); |
| <span class="self">self</span>.committed = <span class="bool-val">true</span>; |
| <span class="prelude-val">Some</span>(v) |
| } |
| PeekErr(e) => { |
| <span class="self">self</span>.state = <span class="kw">match </span><span class="self">self</span>.input.reset(before) { |
| <span class="prelude-val">Err</span>(err) => State::CommitErr(err), |
| <span class="prelude-val">Ok</span>(<span class="kw">_</span>) => State::PeekErr(e.error), |
| }; |
| <span class="prelude-val">None |
| </span>} |
| CommitErr(e) => { |
| <span class="self">self</span>.state = State::CommitErr(e); |
| <span class="prelude-val">None |
| </span>} |
| } |
| } |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>Many<F, P>(P, PhantomData<F>); |
| |
| <span class="kw">impl</span><F, Input, P> Parser<Input> <span class="kw">for </span>Many<F, P> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| F: Extend<P::Output> + Default, |
| { |
| <span class="kw">type </span>Output = F; |
| <span class="kw">type </span>PartialState = (F, P::PartialState); |
| |
| <span class="macro">parse_mode!</span>(Input); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| mode: M, |
| input: <span class="kw-2">&mut </span>Input, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<<span class="self">Self</span>::Output, Input::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| <span class="comment">// TODO |
| </span><span class="kw">let </span>(<span class="kw-2">ref mut </span>elements, <span class="kw-2">ref mut </span>child_state) = <span class="kw-2">*</span>state; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>iter = (<span class="kw-2">&mut </span><span class="self">self</span>.<span class="number">0</span>).partial_iter(mode, input, child_state); |
| elements.extend(iter.by_ref()); |
| iter.into_result_fast(elements) |
| } |
| |
| <span class="kw">fn </span>add_error(<span class="kw-2">&mut </span><span class="self">self</span>, errors: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="self">self</span>.<span class="number">0</span>.add_error(errors) |
| } |
| |
| <span class="kw">fn </span>add_committed_expected_error(<span class="kw-2">&mut </span><span class="self">self</span>, errors: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="self">self</span>.add_error(errors); |
| } |
| |
| <span class="kw">fn </span>parser_count(<span class="kw-2">&</span><span class="self">self</span>) -> ErrorOffset { |
| <span class="self">self</span>.<span class="number">0</span>.parser_count() |
| } |
| } |
| |
| <span class="doccomment">/// Parses `p` zero or more times returning a collection with the values from `p`. |
| /// |
| /// If the returned collection cannot be inferred type annotations must be supplied, either by |
| /// annotating the resulting type binding `let collection: Vec<_> = ...` or by specializing when |
| /// calling many, `many::<Vec<_>, _, _>(...)`. |
| /// |
| /// NOTE: If `p` can succeed without consuming any input this may hang forever as `many` will |
| /// repeatedly use `p` to parse the same location in the input every time |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char::digit; |
| /// # fn main() { |
| /// let result = many(digit()) |
| /// .parse("123A") |
| /// .map(|x| x.0); |
| /// assert_eq!(result, Ok(vec!['1', '2', '3'])); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>many<F, Input, P>(p: P) -> Many<F, P> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| F: Extend<P::Output> + Default, |
| { |
| Many(p, PhantomData) |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>Many1<F, P>(P, PhantomData<<span class="kw">fn</span>() -> F>); |
| <span class="kw">impl</span><F, Input, P> Parser<Input> <span class="kw">for </span>Many1<F, P> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| { |
| <span class="kw">type </span>Output = F; |
| <span class="kw">type </span>PartialState = (bool, bool, F, P::PartialState); |
| |
| <span class="macro">parse_mode!</span>(Input); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| <span class="kw-2">mut </span>mode: M, |
| input: <span class="kw-2">&mut </span>Input, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<F, Input::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| <span class="kw">let </span>(<span class="kw-2">ref mut </span>parsed_one, <span class="kw-2">ref mut </span>committed_state, <span class="kw-2">ref mut </span>elements, <span class="kw-2">ref mut </span>child_state) = |
| <span class="kw-2">*</span>state; |
| |
| <span class="kw">if </span>mode.is_first() || !<span class="kw-2">*</span>parsed_one { |
| <span class="macro">debug_assert!</span>(!<span class="kw-2">*</span>parsed_one); |
| |
| <span class="kw">let </span>(first, committed) = <span class="macro">ctry!</span>(<span class="self">self</span>.<span class="number">0</span>.parse_mode(mode, input, child_state)); |
| elements.extend(<span class="prelude-val">Some</span>(first)); |
| <span class="comment">// TODO Should PeekOk be an error? |
| </span><span class="kw-2">*</span>committed_state = !committed.is_peek(); |
| <span class="kw-2">*</span>parsed_one = <span class="bool-val">true</span>; |
| mode.set_first(); |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>iter = Iter { |
| parser: <span class="kw-2">&mut </span><span class="self">self</span>.<span class="number">0</span>, |
| committed: <span class="kw-2">*</span>committed_state, |
| input, |
| state: State::Ok, |
| partial_state: child_state, |
| mode, |
| }; |
| elements.extend(iter.by_ref()); |
| |
| iter.into_result_fast(elements).map(|x| { |
| <span class="kw-2">*</span>parsed_one = <span class="bool-val">false</span>; |
| x |
| }) |
| } |
| |
| <span class="kw">fn </span>add_committed_expected_error(<span class="kw-2">&mut </span><span class="self">self</span>, errors: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="self">self</span>.add_error(errors); |
| } |
| |
| <span class="macro">forward_parser!</span>(Input, add_error parser_count, <span class="number">0</span>); |
| } |
| |
| <span class="doccomment">/// Parses `p` one or more times returning a collection with the values from `p`. |
| /// |
| /// If the returned collection cannot be inferred type annotations must be supplied, either by |
| /// annotating the resulting type binding `let collection: Vec<_> = ...` or by specializing when |
| /// calling many1 `many1::<Vec<_>, _>(...)`. |
| /// |
| /// NOTE: If `p` can succeed without consuming any input this may hang forever as `many1` will |
| /// repeatedly use `p` to parse the same location in the input every time |
| /// |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char::digit; |
| /// # fn main() { |
| /// let result = many1::<Vec<_>, _, _>(digit()) |
| /// .parse("A123"); |
| /// assert!(result.is_err()); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>many1<F, Input, P>(p: P) -> Many1<F, P> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| { |
| Many1(p, PhantomData) |
| } |
| |
| <span class="attribute">#[derive(Clone)] |
| #[doc(hidden)] |
| </span><span class="comment">// FIXME Should not be public |
| </span><span class="kw">pub struct </span>Sink; |
| |
| <span class="kw">impl </span>Default <span class="kw">for </span>Sink { |
| <span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| Sink |
| } |
| } |
| |
| <span class="kw">impl</span><A> Extend<A> <span class="kw">for </span>Sink { |
| <span class="kw">fn </span>extend<T>(<span class="kw-2">&mut </span><span class="self">self</span>, iter: T) |
| <span class="kw">where |
| </span>T: IntoIterator<Item = A>, |
| { |
| <span class="kw">for _ in </span>iter {} |
| } |
| } |
| |
| <span class="macro">parser! </span>{ |
| <span class="kw">pub struct </span>SkipMany; |
| <span class="kw">type </span>PartialState = <Ignore<Many<Sink, Ignore<P>>> <span class="kw">as </span>Parser<Input>>::PartialState; |
| <span class="doccomment">/// Parses `p` zero or more times ignoring the result. |
| /// |
| /// NOTE: If `p` can succeed without consuming any input this may hang forever as `skip_many` will |
| /// repeatedly use `p` to parse the same location in the input every time |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char::digit; |
| /// # fn main() { |
| /// let result = skip_many(digit()) |
| /// .parse("A"); |
| /// assert_eq!(result, Ok(((), "A"))); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>skip_many[Input, P](p: P)(Input) -> () |
| <span class="kw">where </span>[ |
| P: Parser<Input>, |
| ] |
| { |
| ignore(many::<Sink, <span class="kw">_</span>, <span class="kw">_</span>>(ignore(p))) |
| } |
| } |
| |
| <span class="macro">parser! </span>{ |
| <span class="kw">pub struct </span>SkipMany1; |
| <span class="kw">type </span>PartialState = <Ignore<Many1<Sink, Ignore<P>>> <span class="kw">as </span>Parser<Input>>::PartialState; |
| <span class="doccomment">/// Parses `p` one or more times ignoring the result. |
| /// |
| /// NOTE: If `p` can succeed without consuming any input this may hang forever as `skip_many1` will |
| /// repeatedly use `p` to parse the same location in the input every time |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char::digit; |
| /// # fn main() { |
| /// let result = skip_many1(digit()) |
| /// .parse("123A"); |
| /// assert_eq!(result, Ok(((), "A"))); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>skip_many1[Input, P](p: P)(Input) -> () |
| <span class="kw">where </span>[ |
| P: Parser<Input>, |
| ] |
| { |
| ignore(many1::<Sink, <span class="kw">_</span>, <span class="kw">_</span>>(ignore(p))) |
| } |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>SepBy<F, P, S> { |
| parser: P, |
| separator: S, |
| _marker: PhantomData<<span class="kw">fn</span>() -> F>, |
| } |
| <span class="kw">impl</span><F, Input, P, S> Parser<Input> <span class="kw">for </span>SepBy<F, P, S> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| S: Parser<Input>, |
| { |
| <span class="kw">type </span>Output = F; |
| <span class="kw">type </span>PartialState = <Or< |
| SepBy1<F, P, S>, |
| FnParser<Input, <span class="kw">fn</span>(<span class="kw-2">&mut </span>Input) -> StdParseResult<F, Input>>, |
| > <span class="kw">as </span>Parser<Input>>::PartialState; |
| |
| <span class="macro">parse_mode!</span>(Input); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| mode: M, |
| input: <span class="kw-2">&mut </span>Input, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<F, Input::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| sep_by1(<span class="kw-2">&mut </span><span class="self">self</span>.parser, <span class="kw-2">&mut </span><span class="self">self</span>.separator) |
| .or(parser(|<span class="kw">_</span>| <span class="prelude-val">Ok</span>((F::default(), Commit::Peek(()))))) |
| .parse_mode(mode, input, state) |
| } |
| |
| <span class="kw">fn </span>add_committed_expected_error(<span class="kw-2">&mut </span><span class="self">self</span>, errors: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="self">self</span>.separator.add_error(errors) |
| } |
| |
| <span class="macro">forward_parser!</span>(Input, add_error parser_count, parser); |
| } |
| |
| <span class="doccomment">/// Parses `parser` zero or more time separated by `separator`, returning a collection with the |
| /// values from `p`. |
| /// |
| /// If the returned collection cannot be inferred type annotations must be supplied, either by |
| /// annotating the resulting type binding `let collection: Vec<_> = ...` or by specializing when |
| /// calling `sep_by`, `sep_by::<Vec<_>, _, _>(...)`. |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char::digit; |
| /// # fn main() { |
| /// let mut parser = sep_by(digit(), token(',')); |
| /// let result_ok = parser.parse("1,2,3"); |
| /// assert_eq!(result_ok, Ok((vec!['1', '2', '3'], ""))); |
| /// let result_ok2 = parser.parse(""); |
| /// assert_eq!(result_ok2, Ok((vec![], ""))); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>sep_by<F, Input, P, S>(parser: P, separator: S) -> SepBy<F, P, S> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| S: Parser<Input>, |
| { |
| SepBy { |
| parser, |
| separator, |
| _marker: PhantomData, |
| } |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>SepBy1<F, P, S> { |
| parser: P, |
| separator: S, |
| _marker: PhantomData<<span class="kw">fn</span>() -> F>, |
| } |
| <span class="kw">impl</span><F, Input, P, S> Parser<Input> <span class="kw">for </span>SepBy1<F, P, S> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| S: Parser<Input>, |
| { |
| <span class="kw">type </span>Output = F; |
| <span class="kw">type </span>PartialState = ( |
| <span class="prelude-ty">Option</span><Commit<()>>, |
| F, |
| <With<S, P> <span class="kw">as </span>Parser<Input>>::PartialState, |
| ); |
| |
| <span class="macro">parse_mode!</span>(Input); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| mode: M, |
| input: <span class="kw-2">&mut </span>Input, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<<span class="self">Self</span>::Output, Input::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| <span class="kw">let </span>(<span class="kw-2">ref mut </span>parsed_one, <span class="kw-2">ref mut </span>elements, <span class="kw-2">ref mut </span>child_state) = <span class="kw-2">*</span>state; |
| |
| <span class="kw">let </span>rest = <span class="kw">match </span><span class="kw-2">*</span>parsed_one { |
| <span class="prelude-val">Some</span>(rest) => rest, |
| <span class="prelude-val">None </span>=> { |
| <span class="kw">let </span>(first, rest) = |
| <span class="macro">ctry!</span>(<span class="self">self |
| </span>.parser |
| .parse_mode(mode, input, <span class="kw-2">&mut </span>child_state.B.state)); |
| elements.extend(<span class="prelude-val">Some</span>(first)); |
| rest |
| } |
| }; |
| |
| rest.combine_commit(<span class="kw">move </span>|<span class="kw">_</span>| { |
| <span class="kw">let </span>rest = (<span class="kw-2">&mut </span><span class="self">self</span>.separator).with(<span class="kw-2">&mut </span><span class="self">self</span>.parser); |
| <span class="kw">let </span><span class="kw-2">mut </span>iter = Iter::new(rest, mode, input, child_state); |
| |
| elements.extend(iter.by_ref()); |
| |
| iter.into_result_fast(elements).map(|x| { |
| <span class="kw-2">*</span>parsed_one = <span class="prelude-val">None</span>; |
| x |
| }) |
| }) |
| } |
| |
| <span class="kw">fn </span>add_committed_expected_error(<span class="kw-2">&mut </span><span class="self">self</span>, errors: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="self">self</span>.separator.add_error(errors) |
| } |
| |
| <span class="macro">forward_parser!</span>(Input, add_error parser_count, parser); |
| } |
| |
| <span class="doccomment">/// Parses `parser` one or more time separated by `separator`, returning a collection with the |
| /// values from `p`. |
| /// |
| /// If the returned collection cannot be inferred type annotations must be supplied, either by |
| /// annotating the resulting type binding `let collection: Vec<_> = ...` or by specializing when |
| /// calling `sep_by`, `sep_by1::<Vec<_>, _, _>(...)`. |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char::digit; |
| /// # use combine::stream::easy; |
| /// # use combine::stream::position::{self, SourcePosition}; |
| /// # fn main() { |
| /// let mut parser = sep_by1(digit(), token(',')); |
| /// let result_ok = parser.easy_parse(position::Stream::new("1,2,3")) |
| /// .map(|(vec, state)| (vec, state.input)); |
| /// assert_eq!(result_ok, Ok((vec!['1', '2', '3'], ""))); |
| /// let result_err = parser.easy_parse(position::Stream::new("")); |
| /// assert_eq!(result_err, Err(easy::Errors { |
| /// position: SourcePosition::default(), |
| /// errors: vec![ |
| /// easy::Error::end_of_input(), |
| /// easy::Error::Expected("digit".into()) |
| /// ] |
| /// })); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>sep_by1<F, Input, P, S>(parser: P, separator: S) -> SepBy1<F, P, S> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| S: Parser<Input>, |
| { |
| SepBy1 { |
| parser, |
| separator, |
| _marker: PhantomData, |
| } |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>SepEndBy<F, P, S> { |
| parser: P, |
| separator: S, |
| _marker: PhantomData<<span class="kw">fn</span>() -> F>, |
| } |
| |
| <span class="kw">impl</span><F, Input, P, S> Parser<Input> <span class="kw">for </span>SepEndBy<F, P, S> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| S: Parser<Input>, |
| { |
| <span class="kw">type </span>Output = F; |
| <span class="kw">type </span>PartialState = <Or< |
| SepEndBy1<F, P, S>, |
| FnParser<Input, <span class="kw">fn</span>(<span class="kw-2">&mut </span>Input) -> StdParseResult<F, Input>>, |
| > <span class="kw">as </span>Parser<Input>>::PartialState; |
| |
| <span class="macro">parse_mode!</span>(Input); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| mode: M, |
| input: <span class="kw-2">&mut </span>Input, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<<span class="self">Self</span>::Output, Input::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| sep_end_by1(<span class="kw-2">&mut </span><span class="self">self</span>.parser, <span class="kw-2">&mut </span><span class="self">self</span>.separator) |
| .or(parser(|<span class="kw">_</span>| <span class="prelude-val">Ok</span>((F::default(), Commit::Peek(()))))) |
| .parse_mode(mode, input, state) |
| } |
| |
| <span class="kw">fn </span>add_error(<span class="kw-2">&mut </span><span class="self">self</span>, errors: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="self">self</span>.parser.add_error(errors) |
| } |
| } |
| |
| <span class="doccomment">/// Parses `parser` zero or more times separated and ended by `separator`, returning a collection |
| /// with the values from `p`. |
| /// |
| /// If the returned collection cannot be inferred type annotations must be supplied, either by |
| /// annotating the resulting type binding `let collection: Vec<_> = ...` or by specializing when |
| /// calling `sep_by`, `sep_by::<Vec<_>, _, _>(...)` |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char::digit; |
| /// # fn main() { |
| /// let mut parser = sep_end_by(digit(), token(';')); |
| /// let result_ok = parser.parse("1;2;3;"); |
| /// assert_eq!(result_ok, Ok((vec!['1', '2', '3'], ""))); |
| /// let result_ok2 = parser.parse("1;2;3"); |
| /// assert_eq!(result_ok2, Ok((vec!['1', '2', '3'], ""))); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>sep_end_by<F, Input, P, S>(parser: P, separator: S) -> SepEndBy<F, P, S> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| S: Parser<Input>, |
| { |
| SepEndBy { |
| parser, |
| separator, |
| _marker: PhantomData, |
| } |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>SepEndBy1<F, P, S> { |
| parser: P, |
| separator: S, |
| _marker: PhantomData<<span class="kw">fn</span>() -> F>, |
| } |
| |
| <span class="kw">impl</span><F, Input, P, S> Parser<Input> <span class="kw">for </span>SepEndBy1<F, P, S> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| S: Parser<Input>, |
| { |
| <span class="kw">type </span>Output = F; |
| <span class="kw">type </span>PartialState = ( |
| <span class="prelude-ty">Option</span><Commit<()>>, |
| F, |
| <With<S, Optional<P>> <span class="kw">as </span>Parser<Input>>::PartialState, |
| ); |
| |
| <span class="macro">parse_mode!</span>(Input); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| mode: M, |
| input: <span class="kw-2">&mut </span>Input, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<<span class="self">Self</span>::Output, Input::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| <span class="kw">let </span>(<span class="kw-2">ref mut </span>parsed_one, <span class="kw-2">ref mut </span>elements, <span class="kw-2">ref mut </span>child_state) = <span class="kw-2">*</span>state; |
| |
| <span class="kw">let </span>rest = <span class="kw">match </span><span class="kw-2">*</span>parsed_one { |
| <span class="prelude-val">Some</span>(rest) => rest, |
| <span class="prelude-val">None </span>=> { |
| <span class="kw">let </span>(first, rest) = |
| <span class="macro">ctry!</span>(<span class="self">self |
| </span>.parser |
| .parse_mode(mode, input, <span class="kw-2">&mut </span>child_state.B.state)); |
| <span class="kw-2">*</span>parsed_one = <span class="prelude-val">Some</span>(rest); |
| elements.extend(<span class="prelude-val">Some</span>(first)); |
| rest |
| } |
| }; |
| |
| rest.combine_commit(|<span class="kw">_</span>| { |
| <span class="kw">let </span>rest = (<span class="kw-2">&mut </span><span class="self">self</span>.separator).with(optional(<span class="kw-2">&mut </span><span class="self">self</span>.parser)); |
| <span class="kw">let </span><span class="kw-2">mut </span>iter = Iter::new(rest, mode, input, child_state); |
| |
| <span class="comment">// Parse elements until `self.parser` returns `None` |
| </span>elements.extend(iter.by_ref().scan((), |<span class="kw">_</span>, x| x)); |
| |
| <span class="kw">if </span>iter.committed { |
| <span class="kw-2">*</span>parsed_one = <span class="prelude-val">Some</span>(Commit::Commit(())); |
| } |
| |
| iter.into_result_fast(elements).map(|x| { |
| <span class="kw-2">*</span>parsed_one = <span class="prelude-val">None</span>; |
| x |
| }) |
| }) |
| } |
| |
| <span class="kw">fn </span>add_error(<span class="kw-2">&mut </span><span class="self">self</span>, errors: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="self">self</span>.parser.add_error(errors) |
| } |
| } |
| |
| <span class="doccomment">/// Parses `parser` one or more times separated and ended by `separator`, returning a collection |
| /// with the values from `p`. |
| /// |
| /// If the returned collection cannot be inferred type annotations must be |
| /// supplied, either by annotating the resulting type binding `let collection: Vec<_> = ...` or by |
| /// specializing when calling `sep_by`, `sep_by1::<Vec<_>, _, _>(...)`. |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char::digit; |
| /// # use combine::stream::easy; |
| /// # use combine::stream::position::{self, SourcePosition}; |
| /// # fn main() { |
| /// let mut parser = sep_end_by1(digit(), token(';')); |
| /// let result_ok = parser.easy_parse(position::Stream::new("1;2;3;")) |
| /// .map(|(vec, state)| (vec, state.input)); |
| /// assert_eq!(result_ok, Ok((vec!['1', '2', '3'], ""))); |
| /// let result_err = parser.easy_parse(position::Stream::new("")); |
| /// assert_eq!(result_err, Err(easy::Errors { |
| /// position: SourcePosition::default(), |
| /// errors: vec![ |
| /// easy::Error::end_of_input(), |
| /// easy::Error::Expected("digit".into()) |
| /// ] |
| /// })); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>sep_end_by1<F, Input, P, S>(parser: P, separator: S) -> SepEndBy1<F, P, S> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| S: Parser<Input>, |
| { |
| SepEndBy1 { |
| parser, |
| separator, |
| _marker: PhantomData, |
| } |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>Chainl1<P, Op>(P, Op); |
| <span class="kw">impl</span><Input, P, Op> Parser<Input> <span class="kw">for </span>Chainl1<P, Op> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| Op: Parser<Input>, |
| Op::Output: FnOnce(P::Output, P::Output) -> P::Output, |
| { |
| <span class="kw">type </span>Output = P::Output; |
| <span class="kw">type </span>PartialState = ( |
| <span class="prelude-ty">Option</span><(P::Output, Commit<()>)>, |
| <(Op, P) <span class="kw">as </span>Parser<Input>>::PartialState, |
| ); |
| |
| <span class="macro">parse_mode!</span>(Input); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| <span class="kw-2">mut </span>mode: M, |
| input: <span class="kw-2">&mut </span>Input, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<<span class="self">Self</span>::Output, Input::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| <span class="kw">let </span>(<span class="kw-2">ref mut </span>l_state, <span class="kw-2">ref mut </span>child_state) = <span class="kw-2">*</span>state; |
| |
| <span class="kw">let </span>(<span class="kw-2">mut </span>l, <span class="kw-2">mut </span>committed) = <span class="kw">match </span>l_state.take() { |
| <span class="prelude-val">Some</span>(x) => x, |
| <span class="prelude-val">None </span>=> { |
| <span class="kw">let </span>x = <span class="macro">ctry!</span>(<span class="self">self</span>.<span class="number">0</span>.parse_partial(input, <span class="kw-2">&mut </span>child_state.B.state)); |
| mode.set_first(); |
| x |
| } |
| }; |
| |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>before = input.checkpoint(); |
| <span class="kw">match </span>(<span class="kw-2">&mut </span><span class="self">self</span>.<span class="number">1</span>, <span class="kw-2">&mut </span><span class="self">self</span>.<span class="number">0</span>) |
| .parse_mode(mode, input, child_state) |
| .into() |
| { |
| <span class="prelude-val">Ok</span>(((op, r), rest)) => { |
| l = op(l, r); |
| committed = committed.merge(rest); |
| mode.set_first(); |
| } |
| <span class="prelude-val">Err</span>(Commit::Commit(err)) => { |
| <span class="kw-2">*</span>l_state = <span class="prelude-val">Some</span>((l, committed)); |
| <span class="kw">return </span>CommitErr(err.error); |
| } |
| <span class="prelude-val">Err</span>(Commit::Peek(<span class="kw">_</span>)) => { |
| <span class="macro">ctry!</span>(input.reset(before).committed()); |
| <span class="kw">break</span>; |
| } |
| } |
| } |
| <span class="prelude-val">Ok</span>((l, committed)).into() |
| } |
| |
| <span class="kw">fn </span>add_error(<span class="kw-2">&mut </span><span class="self">self</span>, errors: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="self">self</span>.<span class="number">0</span>.add_error(errors) |
| } |
| } |
| |
| <span class="doccomment">/// Parses `p` 1 or more times separated by `op`. The value returned is the one produced by the |
| /// left associative application of the function returned by the parser `op`. |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char::digit; |
| /// # fn main() { |
| /// let number = digit().map(|c: char| c.to_digit(10).unwrap()); |
| /// let sub = token('-').map(|_| |l: u32, r: u32| l - r); |
| /// let mut parser = chainl1(number, sub); |
| /// assert_eq!(parser.parse("9-3-5"), Ok((1, ""))); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>chainl1<Input, P, Op>(parser: P, op: Op) -> Chainl1<P, Op> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| Op: Parser<Input>, |
| Op::Output: FnOnce(P::Output, P::Output) -> P::Output, |
| { |
| Chainl1(parser, op) |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>Chainr1<P, Op>(P, Op); |
| <span class="kw">impl</span><Input, P, Op> Parser<Input> <span class="kw">for </span>Chainr1<P, Op> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| Op: Parser<Input>, |
| Op::Output: FnOnce(P::Output, P::Output) -> P::Output, |
| { |
| <span class="kw">type </span>Output = P::Output; |
| <span class="kw">type </span>PartialState = (); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_lazy(<span class="kw-2">&mut </span><span class="self">self</span>, input: <span class="kw-2">&mut </span>Input) -> ParseResult<P::Output, Input::Error> { |
| <span class="comment">// FIXME FastResult |
| </span><span class="kw">let </span>(<span class="kw-2">mut </span>l, <span class="kw-2">mut </span>committed) = <span class="macro">ctry!</span>(<span class="self">self</span>.<span class="number">0</span>.parse_lazy(input)); |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>before = input.checkpoint(); |
| <span class="kw">let </span>op = <span class="kw">match </span><span class="self">self</span>.<span class="number">1</span>.parse_lazy(input).into() { |
| <span class="prelude-val">Ok</span>((x, rest)) => { |
| committed = committed.merge(rest); |
| x |
| } |
| <span class="prelude-val">Err</span>(Commit::Commit(err)) => <span class="kw">return </span>CommitErr(err.error), |
| <span class="prelude-val">Err</span>(Commit::Peek(<span class="kw">_</span>)) => { |
| <span class="macro">ctry!</span>(input.reset(before).committed()); |
| <span class="kw">break</span>; |
| } |
| }; |
| <span class="kw">let </span>before = input.checkpoint(); |
| <span class="kw">match </span><span class="self">self</span>.parse_lazy(input).into() { |
| <span class="prelude-val">Ok</span>((r, rest)) => { |
| l = op(l, r); |
| committed = committed.merge(rest); |
| } |
| <span class="prelude-val">Err</span>(Commit::Commit(err)) => <span class="kw">return </span>CommitErr(err.error), |
| <span class="prelude-val">Err</span>(Commit::Peek(<span class="kw">_</span>)) => { |
| <span class="macro">ctry!</span>(input.reset(before).committed()); |
| <span class="kw">break</span>; |
| } |
| } |
| } |
| <span class="prelude-val">Ok</span>((l, committed)).into() |
| } |
| <span class="kw">fn </span>add_error(<span class="kw-2">&mut </span><span class="self">self</span>, errors: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="self">self</span>.<span class="number">0</span>.add_error(errors) |
| } |
| } |
| |
| <span class="doccomment">/// Parses `p` one or more times separated by `op`. The value returned is the one produced by the |
| /// right associative application of the function returned by `op`. |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char::digit; |
| /// # fn main() { |
| /// let number = digit().map(|c: char| c.to_digit(10).unwrap()); |
| /// let pow = token('^').map(|_| |l: u32, r: u32| l.pow(r)); |
| /// let mut parser = chainr1(number, pow); |
| /// assert_eq!(parser.parse("2^3^2"), Ok((512, ""))); |
| /// } |
| /// ``` |
| </span><span class="kw">pub fn </span>chainr1<Input, P, Op>(parser: P, op: Op) -> Chainr1<P, Op> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| Op: Parser<Input>, |
| Op::Output: FnOnce(P::Output, P::Output) -> P::Output, |
| { |
| Chainr1(parser, op) |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>TakeUntil<F, P> { |
| end: P, |
| _marker: PhantomData<<span class="kw">fn</span>() -> F>, |
| } |
| <span class="kw">impl</span><F, Input, P> Parser<Input> <span class="kw">for </span>TakeUntil<F, P> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<<Input <span class="kw">as </span>StreamOnce>::Token> + Default, |
| P: Parser<Input>, |
| { |
| <span class="kw">type </span>Output = F; |
| <span class="kw">type </span>PartialState = (F, P::PartialState); |
| |
| <span class="macro">parse_mode!</span>(Input); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| mode: M, |
| input: <span class="kw-2">&mut </span>Input, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<<span class="self">Self</span>::Output, Input::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| <span class="kw">let </span>(<span class="kw-2">ref mut </span>output, <span class="kw-2">ref mut </span>end_state) = <span class="kw-2">*</span>state; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>committed = Commit::Peek(()); |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>before = input.checkpoint(); |
| <span class="kw">match </span><span class="self">self</span>.end.parse_mode(mode, input, end_state).into() { |
| <span class="prelude-val">Ok</span>((<span class="kw">_</span>, rest)) => { |
| <span class="macro">ctry!</span>(input.reset(before).committed()); |
| <span class="kw">return match </span>committed.merge(rest) { |
| Commit::Commit(()) => CommitOk(mem::take(output)), |
| Commit::Peek(()) => PeekOk(mem::take(output)), |
| }; |
| } |
| <span class="prelude-val">Err</span>(Commit::Peek(<span class="kw">_</span>)) => { |
| <span class="macro">ctry!</span>(input.reset(before).committed()); |
| output.extend(<span class="prelude-val">Some</span>(<span class="macro">ctry!</span>(uncons(input)).<span class="number">0</span>)); |
| committed = Commit::Commit(()); |
| } |
| <span class="prelude-val">Err</span>(Commit::Commit(e)) => { |
| <span class="macro">ctry!</span>(input.reset(before).committed()); |
| <span class="kw">return </span>CommitErr(e.error); |
| } |
| }; |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Takes input until `end` is encountered or `end` indicates that it has committed input before |
| /// failing (`attempt` can be used to make it look like it has not committed any input) |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char; |
| /// # use combine::parser::byte; |
| /// # use combine::parser::combinator::attempt; |
| /// # use combine::parser::repeat::take_until; |
| /// # fn main() { |
| /// let mut char_parser = take_until(char::digit()); |
| /// assert_eq!(char_parser.parse("abc123"), Ok(("abc".to_string(), "123"))); |
| /// |
| /// let mut byte_parser = take_until(byte::bytes(&b"TAG"[..])); |
| /// assert_eq!(byte_parser.parse(&b"123TAG"[..]), Ok((b"123".to_vec(), &b"TAG"[..]))); |
| /// assert!(byte_parser.parse(&b"123TATAG"[..]).is_err()); |
| /// |
| /// // `attempt` must be used if the `end` should be consume input before failing |
| /// let mut byte_parser = take_until(attempt(byte::bytes(&b"TAG"[..]))); |
| /// assert_eq!(byte_parser.parse(&b"123TATAG"[..]), Ok((b"123TA".to_vec(), &b"TAG"[..]))); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>take_until<F, Input, P>(end: P) -> TakeUntil<F, P> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<<Input <span class="kw">as </span>StreamOnce>::Token> + Default, |
| P: Parser<Input>, |
| { |
| TakeUntil { |
| end, |
| _marker: PhantomData, |
| } |
| } |
| |
| <span class="macro">parser! </span>{ |
| <span class="kw">pub struct </span>SkipUntil; |
| <span class="kw">type </span>PartialState = <With<TakeUntil<Sink, P>, Value<Input, ()>> <span class="kw">as </span>Parser<Input>>::PartialState; |
| <span class="doccomment">/// Skips input until `end` is encountered or `end` indicates that it has committed input before |
| /// failing (`attempt` can be used to make it look like it has not committed any input) |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char; |
| /// # use combine::parser::byte; |
| /// # use combine::parser::combinator::attempt; |
| /// # use combine::parser::repeat::skip_until; |
| /// # fn main() { |
| /// let mut char_parser = skip_until(char::digit()); |
| /// assert_eq!(char_parser.parse("abc123"), Ok(((), "123"))); |
| /// |
| /// let mut byte_parser = skip_until(byte::bytes(&b"TAG"[..])); |
| /// assert_eq!(byte_parser.parse(&b"123TAG"[..]), Ok(((), &b"TAG"[..]))); |
| /// assert!(byte_parser.parse(&b"123TATAG"[..]).is_err()); |
| /// |
| /// // `attempt` must be used if the `end` should consume input before failing |
| /// let mut byte_parser = skip_until(attempt(byte::bytes(&b"TAG"[..]))); |
| /// assert_eq!(byte_parser.parse(&b"123TATAG"[..]), Ok(((), &b"TAG"[..]))); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>skip_until[Input, P](end: P)(Input) -> () |
| <span class="kw">where </span>[ |
| P: Parser<Input>, |
| ] |
| { |
| take_until::<Sink, <span class="kw">_</span>, <span class="kw">_</span>>(end).with(value(())) |
| } |
| } |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>RepeatUntil<F, P, E> { |
| parser: P, |
| end: E, |
| _marker: PhantomData<<span class="kw">fn</span>() -> F>, |
| } |
| <span class="kw">impl</span><F, Input, P, E> Parser<Input> <span class="kw">for </span>RepeatUntil<F, P, E> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| E: Parser<Input>, |
| { |
| <span class="kw">type </span>Output = F; |
| <span class="kw">type </span>PartialState = (F, bool, P::PartialState, E::PartialState); |
| |
| <span class="macro">parse_mode!</span>(Input); |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| <span class="kw-2">mut </span>mode: M, |
| input: <span class="kw-2">&mut </span>Input, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<<span class="self">Self</span>::Output, Input::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| <span class="kw">let </span>(output, is_parse, parse_state, end_state) = state; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>committed = Commit::Peek(()); |
| <span class="kw">loop </span>{ |
| <span class="kw">if </span><span class="kw-2">*</span>is_parse { |
| <span class="kw">let </span>(token, c) = <span class="macro">ctry!</span>(<span class="self">self</span>.parser.parse_mode(mode, input, parse_state)); |
| output.extend(<span class="prelude-val">Some</span>(token)); |
| committed = committed.merge(c); |
| <span class="kw-2">*</span>is_parse = <span class="bool-val">false</span>; |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>before = input.checkpoint(); |
| <span class="kw">match </span><span class="self">self</span>.end.parse_mode(mode, input, end_state).into() { |
| <span class="prelude-val">Ok</span>((<span class="kw">_</span>, rest)) => { |
| <span class="macro">ctry!</span>(input.reset(before).committed()); |
| <span class="kw">return match </span>committed.merge(rest) { |
| Commit::Commit(()) => CommitOk(mem::take(output)), |
| Commit::Peek(()) => PeekOk(mem::take(output)), |
| }; |
| } |
| <span class="prelude-val">Err</span>(Commit::Peek(<span class="kw">_</span>)) => { |
| <span class="macro">ctry!</span>(input.reset(before).committed()); |
| mode.set_first(); |
| <span class="kw-2">*</span>is_parse = <span class="bool-val">true</span>; |
| } |
| <span class="prelude-val">Err</span>(Commit::Commit(e)) => { |
| <span class="macro">ctry!</span>(input.reset(before).committed()); |
| <span class="kw">return </span>CommitErr(e.error); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| <span class="kw">pub fn </span>repeat_until<F, Input, P, E>(parser: P, end: E) -> RepeatUntil<F, P, E> |
| <span class="kw">where |
| </span>Input: Stream, |
| F: Extend<P::Output> + Default, |
| P: Parser<Input>, |
| E: Parser<Input>, |
| { |
| RepeatUntil { |
| parser, |
| end, |
| _marker: PhantomData, |
| } |
| } |
| |
| <span class="macro">parser! </span>{ |
| <span class="kw">pub struct </span>SkipRepeatUntil; |
| <span class="kw">type </span>PartialState = <With<RepeatUntil<Sink, P, E>, Value<Input, ()>> <span class="kw">as </span>Parser<Input>>::PartialState; |
| <span class="doccomment">/// Skips input until `end` is encountered or `end` indicates that it has committed input before |
| /// failing (`attempt` can be used to continue skipping even if `end` has committed input) |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::char; |
| /// # use combine::parser::byte; |
| /// # use combine::parser::combinator::attempt; |
| /// # use combine::parser::repeat::skip_until; |
| /// # fn main() { |
| /// let mut char_parser = skip_until(char::digit()); |
| /// assert_eq!(char_parser.parse("abc123"), Ok(((), "123"))); |
| /// |
| /// let mut byte_parser = skip_until(byte::bytes(&b"TAG"[..])); |
| /// assert_eq!(byte_parser.parse(&b"123TAG"[..]), Ok(((), &b"TAG"[..]))); |
| /// assert!(byte_parser.parse(&b"123TATAG"[..]).is_err()); |
| /// |
| /// // `attempt` must be used because the `end` will commit to `TA` before failing, |
| /// // but we want to continue skipping |
| /// let mut byte_parser = skip_until(attempt(byte::bytes(&b"TAG"[..]))); |
| /// assert_eq!(byte_parser.parse(&b"123TATAG"[..]), Ok(((), &b"TAG"[..]))); |
| /// } |
| /// ``` |
| </span><span class="kw">pub fn </span>repeat_skip_until[Input, P, E](parser: P, end: E)(Input) -> () |
| <span class="kw">where </span>[ |
| P: Parser<Input>, |
| E: Parser<Input>, |
| ] |
| { |
| repeat_until::<Sink, <span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span>>(parser, end).with(value(())) |
| } |
| } |
| |
| <span class="attribute">#[derive(Default)] |
| </span><span class="kw">pub struct </span>EscapedState<T, U>(PhantomData<(T, U)>); |
| |
| <span class="kw">pub struct </span>Escaped<P, Q, I> { |
| parser: P, |
| escape: I, |
| escape_parser: Q, |
| } |
| <span class="kw">impl</span><Input, P, Q> Parser<Input> <span class="kw">for </span>Escaped<P, Q, Input::Token> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| <Input <span class="kw">as </span>StreamOnce>::Token: PartialEq, |
| Q: Parser<Input>, |
| { |
| <span class="kw">type </span>Output = (); |
| <span class="kw">type </span>PartialState = EscapedState<P::PartialState, Q::PartialState>; |
| |
| <span class="kw">fn </span>parse_lazy(<span class="kw-2">&mut </span><span class="self">self</span>, input: <span class="kw-2">&mut </span>Input) -> ParseResult<<span class="self">Self</span>::Output, Input::Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>committed = Commit::Peek(()); |
| <span class="kw">loop </span>{ |
| <span class="kw">match </span><span class="self">self</span>.parser.parse_lazy(input) { |
| PeekOk(<span class="kw">_</span>) => {} |
| CommitOk(<span class="kw">_</span>) => { |
| committed = Commit::Commit(()); |
| } |
| PeekErr(<span class="kw">_</span>) => { |
| <span class="kw">let </span>checkpoint = input.checkpoint(); |
| <span class="kw">match </span>uncons(input) { |
| CommitOk(<span class="kw-2">ref </span>c) | PeekOk(<span class="kw-2">ref </span>c) <span class="kw">if </span><span class="kw-2">*</span>c == <span class="self">self</span>.escape => { |
| <span class="kw">match </span><span class="self">self</span>.escape_parser.parse_committed_mode( |
| FirstMode, |
| input, |
| <span class="kw-2">&mut </span>Default::default(), |
| ) { |
| PeekOk(<span class="kw">_</span>) => {} |
| CommitOk(<span class="kw">_</span>) => { |
| committed = Commit::Commit(()); |
| } |
| CommitErr(err) => <span class="kw">return </span>CommitErr(err), |
| PeekErr(err) => { |
| <span class="kw">return </span>CommitErr(err.error); |
| } |
| } |
| } |
| CommitErr(err) => { |
| <span class="kw">return </span>CommitErr(err); |
| } |
| <span class="kw">_ </span>=> { |
| <span class="macro">ctry!</span>(input.reset(checkpoint).committed()); |
| <span class="kw">return if </span>committed.is_peek() { |
| PeekOk(()) |
| } <span class="kw">else </span>{ |
| CommitOk(()) |
| }; |
| } |
| } |
| } |
| CommitErr(err) => <span class="kw">return </span>CommitErr(err), |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>add_error(<span class="kw-2">&mut </span><span class="self">self</span>, errors: <span class="kw-2">&mut </span>Tracked<<Input <span class="kw">as </span>StreamOnce>::Error>) { |
| <span class="kw">use </span><span class="kw">crate</span>::error; |
| |
| <span class="self">self</span>.parser.add_error(errors); |
| |
| errors.error.add_expected(error::Token(<span class="self">self</span>.escape.clone())); |
| } |
| } |
| |
| <span class="doccomment">/// Parses an escaped string by first applying `parser` which accept the normal characters which do |
| /// not need escaping. Once `parser` can not consume any more input it checks if the next token |
| /// is `escape`. If it is then `escape_parser` is used to parse the escaped character and then |
| /// resumes parsing using `parser`. If `escape` was not found then the parser finishes |
| /// successfully. |
| /// |
| /// This returns `()` since there isn't a good way to collect the output of the parsers so it is |
| /// best paired with one of the `recognize` parsers. |
| /// |
| /// ``` |
| /// # extern crate combine; |
| /// # use combine::*; |
| /// # use combine::parser::repeat::escaped; |
| /// # use combine::parser::char; |
| /// # use combine::parser::range::{recognize, take_while1}; |
| /// # fn main() { |
| /// let mut parser = recognize( |
| /// escaped(take_while1(|c| c != '"' && c != '\\'), '\\', one_of(r#"nr"\"#.chars())) |
| /// ); |
| /// assert_eq!(parser.parse(r#"ab\"12\n\rc""#), Ok((r#"ab\"12\n\rc"#, r#"""#))); |
| /// assert!(parser.parse(r#"\"#).is_err()); |
| /// assert!(parser.parse(r#"\a"#).is_err()); |
| /// } |
| /// ``` |
| </span><span class="kw">pub fn </span>escaped<Input, P, Q>( |
| parser: P, |
| escape: <Input <span class="kw">as </span>StreamOnce>::Token, |
| escape_parser: Q, |
| ) -> Escaped<P, Q, Input::Token> |
| <span class="kw">where |
| </span>Input: Stream, |
| P: Parser<Input>, |
| <Input <span class="kw">as </span>StreamOnce>::Token: PartialEq, |
| Q: Parser<Input>, |
| { |
| Escaped { |
| parser, |
| escape, |
| escape_parser, |
| } |
| } |
| |
| <span class="kw">pub struct </span>Iterate<F, I, P> { |
| parser: P, |
| iterable: I, |
| _marker: PhantomData<<span class="kw">fn</span>() -> F>, |
| } |
| <span class="kw">impl</span><<span class="lifetime">'s</span>, <span class="lifetime">'a</span>, P, Q, I, J, F> Parser<I> <span class="kw">for </span>Iterate<F, J, P> |
| <span class="kw">where |
| </span>P: FnMut(<span class="kw-2">&</span>J::Item, <span class="kw-2">&mut </span>I) -> Q, |
| Q: Parser<I>, |
| I: Stream, |
| J: IntoIterator + Clone, |
| F: Extend<Q::Output> + Default, |
| { |
| <span class="kw">type </span>Output = F; |
| <span class="kw">type </span>PartialState = ( |
| <span class="prelude-ty">Option</span><(J::IntoIter, <span class="prelude-ty">Option</span><J::Item>)>, |
| bool, |
| F, |
| Q::PartialState, |
| ); |
| |
| <span class="macro">parse_mode!</span>(I); |
| |
| <span class="kw">fn </span>parse_mode_impl<M>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| <span class="kw-2">mut </span>mode: M, |
| input: <span class="kw-2">&mut </span>I, |
| state: <span class="kw-2">&mut </span><span class="self">Self</span>::PartialState, |
| ) -> ParseResult<<span class="self">Self</span>::Output, I::Error> |
| <span class="kw">where |
| </span>M: ParseMode, |
| { |
| <span class="kw">let </span>(opt_iter, committed, buf, next) = state; |
| <span class="kw">let </span>(iter, next_item) = <span class="kw">match </span>opt_iter { |
| <span class="prelude-val">Some</span>(iter) <span class="kw">if </span>!mode.is_first() => iter, |
| <span class="kw">_ </span>=> { |
| <span class="kw-2">*</span>opt_iter = <span class="prelude-val">Some</span>((<span class="self">self</span>.iterable.clone().into_iter(), <span class="prelude-val">None</span>)); |
| opt_iter.as_mut().unwrap() |
| } |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>consume = |item: J::Item| { |
| <span class="kw">let </span><span class="kw-2">mut </span>parser = (<span class="self">self</span>.parser)(<span class="kw-2">&</span>item, input); |
| <span class="kw">let </span>before = input.checkpoint(); |
| <span class="kw">match </span>parser.parse_mode(mode, input, next) { |
| PeekOk(v) => { |
| mode.set_first(); |
| <span class="prelude-val">Ok</span>(v) |
| } |
| CommitOk(v) => { |
| mode.set_first(); |
| <span class="kw-2">*</span>committed = <span class="bool-val">true</span>; |
| <span class="prelude-val">Ok</span>(v) |
| } |
| PeekErr(err) => { |
| <span class="kw">if let </span><span class="prelude-val">Err</span>(err) = input.reset(before) { |
| <span class="kw">return </span><span class="prelude-val">Err</span>((item, CommitErr(err))); |
| } |
| <span class="prelude-val">Err</span>(( |
| item, |
| <span class="kw">if </span><span class="kw-2">*</span>committed { |
| CommitErr(err.error) |
| } <span class="kw">else </span>{ |
| PeekErr(err) |
| }, |
| )) |
| } |
| CommitErr(err) => <span class="prelude-val">Err</span>((item, CommitErr(err))), |
| } |
| }; |
| |
| <span class="kw">let </span>result = (|| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(item) = next_item.take() { |
| buf.extend(<span class="prelude-val">Some</span>(consume(item)<span class="question-mark">?</span>)); |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>result = <span class="prelude-val">Ok</span>(()); |
| <span class="kw">let </span>size_hint = iter.size_hint(); |
| buf.extend(suggest_size_hint( |
| iter.scan((), |<span class="kw">_</span>, item| <span class="kw">match </span>consume(item) { |
| <span class="prelude-val">Ok</span>(item) => <span class="prelude-val">Some</span>(item), |
| <span class="prelude-val">Err</span>(err) => { |
| result = <span class="prelude-val">Err</span>(err); |
| <span class="prelude-val">None |
| </span>} |
| }), |
| size_hint, |
| )); |
| result |
| })(); |
| |
| <span class="kw">if let </span><span class="prelude-val">Err</span>((item, err)) = result { |
| <span class="kw-2">*</span>next_item = <span class="prelude-val">Some</span>(item); |
| <span class="kw">return </span>err; |
| } |
| |
| opt_iter.take(); |
| |
| <span class="kw">let </span>value = mem::take(buf); |
| <span class="kw">if </span><span class="kw-2">*</span>committed { |
| <span class="kw-2">*</span>committed = <span class="bool-val">false</span>; |
| CommitOk(value) |
| } <span class="kw">else </span>{ |
| PeekOk(value) |
| } |
| } |
| } |
| |
| <span class="doccomment">/// |
| /// ``` |
| /// # use combine::parser::repeat::{count_min_max, iterate}; |
| /// # use combine::*; |
| /// |
| /// assert_eq!( |
| /// iterate(0..3, |&i, _| count_min_max(i, i, any())).parse("abbccc"), |
| /// Ok((vec!["".to_string(), "a".to_string(), "bb".to_string()], "ccc")), |
| /// ); |
| /// ``` |
| </span><span class="kw">pub fn </span>iterate<F, J, P, I, Q>(iterable: J, parser: P) -> Iterate<F, J, P> |
| <span class="kw">where |
| </span>P: FnMut(<span class="kw-2">&</span>J::Item, <span class="kw-2">&mut </span>I) -> Q, |
| Q: Parser<I>, |
| I: Stream, |
| J: IntoIterator + Clone, |
| F: Extend<Q::Output> + Default, |
| { |
| Iterate { |
| parser, |
| iterable, |
| _marker: PhantomData, |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="combine" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |