| <!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/url-2.3.1/src/slicing.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>slicing.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="../../url/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="../../url/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="comment">// Copyright 2016 The rust-url developers. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::Url; |
| <span class="kw">use </span>std::ops::{Index, Range, RangeFrom, RangeFull, RangeTo}; |
| |
| <span class="kw">impl </span>Index<RangeFull> <span class="kw">for </span>Url { |
| <span class="kw">type </span>Output = str; |
| <span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw">_</span>: RangeFull) -> <span class="kw-2">&</span>str { |
| <span class="kw-2">&</span><span class="self">self</span>.serialization |
| } |
| } |
| |
| <span class="kw">impl </span>Index<RangeFrom<Position>> <span class="kw">for </span>Url { |
| <span class="kw">type </span>Output = str; |
| <span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, range: RangeFrom<Position>) -> <span class="kw-2">&</span>str { |
| <span class="kw-2">&</span><span class="self">self</span>.serialization[<span class="self">self</span>.index(range.start)..] |
| } |
| } |
| |
| <span class="kw">impl </span>Index<RangeTo<Position>> <span class="kw">for </span>Url { |
| <span class="kw">type </span>Output = str; |
| <span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, range: RangeTo<Position>) -> <span class="kw-2">&</span>str { |
| <span class="kw-2">&</span><span class="self">self</span>.serialization[..<span class="self">self</span>.index(range.end)] |
| } |
| } |
| |
| <span class="kw">impl </span>Index<Range<Position>> <span class="kw">for </span>Url { |
| <span class="kw">type </span>Output = str; |
| <span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, range: Range<Position>) -> <span class="kw-2">&</span>str { |
| <span class="kw-2">&</span><span class="self">self</span>.serialization[<span class="self">self</span>.index(range.start)..<span class="self">self</span>.index(range.end)] |
| } |
| } |
| |
| <span class="doccomment">/// Indicates a position within a URL based on its components. |
| /// |
| /// A range of positions can be used for slicing `Url`: |
| /// |
| /// ```rust |
| /// # use url::{Url, Position}; |
| /// # fn something(some_url: Url) { |
| /// let serialization: &str = &some_url[..]; |
| /// let serialization_without_fragment: &str = &some_url[..Position::AfterQuery]; |
| /// let authority: &str = &some_url[Position::BeforeUsername..Position::AfterPort]; |
| /// let data_url_payload: &str = &some_url[Position::BeforePath..Position::AfterQuery]; |
| /// let scheme_relative: &str = &some_url[Position::BeforeUsername..]; |
| /// # } |
| /// ``` |
| /// |
| /// In a pseudo-grammar (where `[`…`]?` makes a sub-sequence optional), |
| /// URL components and delimiters that separate them are: |
| /// |
| /// ```notrust |
| /// url = |
| /// scheme ":" |
| /// [ "//" [ username [ ":" password ]? "@" ]? host [ ":" port ]? ]? |
| /// path [ "?" query ]? [ "#" fragment ]? |
| /// ``` |
| /// |
| /// When a given component is not present, |
| /// its "before" and "after" position are the same |
| /// (so that `&some_url[BeforeFoo..AfterFoo]` is the empty string) |
| /// and component ordering is preserved |
| /// (so that a missing query "is between" a path and a fragment). |
| /// |
| /// The end of a component and the start of the next are either the same or separate |
| /// by a delimiter. |
| /// (Not that the initial `/` of a path is considered part of the path here, not a delimiter.) |
| /// For example, `&url[..BeforeFragment]` would include a `#` delimiter (if present in `url`), |
| /// so `&url[..AfterQuery]` might be desired instead. |
| /// |
| /// `BeforeScheme` and `AfterFragment` are always the start and end of the entire URL, |
| /// so `&url[BeforeScheme..X]` is the same as `&url[..X]` |
| /// and `&url[X..AfterFragment]` is the same as `&url[X..]`. |
| </span><span class="attribute">#[derive(Copy, Clone, Debug)] |
| </span><span class="kw">pub enum </span>Position { |
| BeforeScheme, |
| AfterScheme, |
| BeforeUsername, |
| AfterUsername, |
| BeforePassword, |
| AfterPassword, |
| BeforeHost, |
| AfterHost, |
| BeforePort, |
| AfterPort, |
| BeforePath, |
| AfterPath, |
| BeforeQuery, |
| AfterQuery, |
| BeforeFragment, |
| AfterFragment, |
| } |
| |
| <span class="kw">impl </span>Url { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, position: Position) -> usize { |
| <span class="kw">match </span>position { |
| Position::BeforeScheme => <span class="number">0</span>, |
| |
| Position::AfterScheme => <span class="self">self</span>.scheme_end <span class="kw">as </span>usize, |
| |
| Position::BeforeUsername => { |
| <span class="kw">if </span><span class="self">self</span>.has_authority() { |
| <span class="self">self</span>.scheme_end <span class="kw">as </span>usize + <span class="string">"://"</span>.len() |
| } <span class="kw">else </span>{ |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.byte_at(<span class="self">self</span>.scheme_end) == <span class="string">b':'</span>); |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.scheme_end + <span class="string">":"</span>.len() <span class="kw">as </span>u32 == <span class="self">self</span>.username_end); |
| <span class="self">self</span>.scheme_end <span class="kw">as </span>usize + <span class="string">":"</span>.len() |
| } |
| } |
| |
| Position::AfterUsername => <span class="self">self</span>.username_end <span class="kw">as </span>usize, |
| |
| Position::BeforePassword => { |
| <span class="kw">if </span><span class="self">self</span>.has_authority() && <span class="self">self</span>.byte_at(<span class="self">self</span>.username_end) == <span class="string">b':' </span>{ |
| <span class="self">self</span>.username_end <span class="kw">as </span>usize + <span class="string">":"</span>.len() |
| } <span class="kw">else </span>{ |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.username_end == <span class="self">self</span>.host_start); |
| <span class="self">self</span>.username_end <span class="kw">as </span>usize |
| } |
| } |
| |
| Position::AfterPassword => { |
| <span class="kw">if </span><span class="self">self</span>.has_authority() && <span class="self">self</span>.byte_at(<span class="self">self</span>.username_end) == <span class="string">b':' </span>{ |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.byte_at(<span class="self">self</span>.host_start - <span class="string">"@"</span>.len() <span class="kw">as </span>u32) == <span class="string">b'@'</span>); |
| <span class="self">self</span>.host_start <span class="kw">as </span>usize - <span class="string">"@"</span>.len() |
| } <span class="kw">else </span>{ |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.username_end == <span class="self">self</span>.host_start); |
| <span class="self">self</span>.host_start <span class="kw">as </span>usize |
| } |
| } |
| |
| Position::BeforeHost => <span class="self">self</span>.host_start <span class="kw">as </span>usize, |
| |
| Position::AfterHost => <span class="self">self</span>.host_end <span class="kw">as </span>usize, |
| |
| Position::BeforePort => { |
| <span class="kw">if </span><span class="self">self</span>.port.is_some() { |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.byte_at(<span class="self">self</span>.host_end) == <span class="string">b':'</span>); |
| <span class="self">self</span>.host_end <span class="kw">as </span>usize + <span class="string">":"</span>.len() |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.host_end <span class="kw">as </span>usize |
| } |
| } |
| |
| Position::AfterPort => <span class="self">self</span>.path_start <span class="kw">as </span>usize, |
| |
| Position::BeforePath => <span class="self">self</span>.path_start <span class="kw">as </span>usize, |
| |
| Position::AfterPath => <span class="kw">match </span>(<span class="self">self</span>.query_start, <span class="self">self</span>.fragment_start) { |
| (<span class="prelude-val">Some</span>(q), <span class="kw">_</span>) => q <span class="kw">as </span>usize, |
| (<span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(f)) => f <span class="kw">as </span>usize, |
| (<span class="prelude-val">None</span>, <span class="prelude-val">None</span>) => <span class="self">self</span>.serialization.len(), |
| }, |
| |
| Position::BeforeQuery => <span class="kw">match </span>(<span class="self">self</span>.query_start, <span class="self">self</span>.fragment_start) { |
| (<span class="prelude-val">Some</span>(q), <span class="kw">_</span>) => { |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.byte_at(q) == <span class="string">b'?'</span>); |
| q <span class="kw">as </span>usize + <span class="string">"?"</span>.len() |
| } |
| (<span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(f)) => f <span class="kw">as </span>usize, |
| (<span class="prelude-val">None</span>, <span class="prelude-val">None</span>) => <span class="self">self</span>.serialization.len(), |
| }, |
| |
| Position::AfterQuery => <span class="kw">match </span><span class="self">self</span>.fragment_start { |
| <span class="prelude-val">None </span>=> <span class="self">self</span>.serialization.len(), |
| <span class="prelude-val">Some</span>(f) => f <span class="kw">as </span>usize, |
| }, |
| |
| Position::BeforeFragment => <span class="kw">match </span><span class="self">self</span>.fragment_start { |
| <span class="prelude-val">Some</span>(f) => { |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.byte_at(f) == <span class="string">b'#'</span>); |
| f <span class="kw">as </span>usize + <span class="string">"#"</span>.len() |
| } |
| <span class="prelude-val">None </span>=> <span class="self">self</span>.serialization.len(), |
| }, |
| |
| Position::AfterFragment => <span class="self">self</span>.serialization.len(), |
| } |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="url" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
