| <!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/regex-syntax-0.7.2/src/ast/print.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>print.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="../../../regex_syntax/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="../../../regex_syntax/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="523">523</span> |
| <span id="524">524</span> |
| <span id="525">525</span> |
| <span id="526">526</span> |
| <span id="527">527</span> |
| <span id="528">528</span> |
| <span id="529">529</span> |
| <span id="530">530</span> |
| <span id="531">531</span> |
| <span id="532">532</span> |
| <span id="533">533</span> |
| <span id="534">534</span> |
| <span id="535">535</span> |
| <span id="536">536</span> |
| <span id="537">537</span> |
| <span id="538">538</span> |
| <span id="539">539</span> |
| <span id="540">540</span> |
| <span id="541">541</span> |
| <span id="542">542</span> |
| <span id="543">543</span> |
| <span id="544">544</span> |
| <span id="545">545</span> |
| <span id="546">546</span> |
| <span id="547">547</span> |
| <span id="548">548</span> |
| <span id="549">549</span> |
| <span id="550">550</span> |
| <span id="551">551</span> |
| <span id="552">552</span> |
| <span id="553">553</span> |
| <span id="554">554</span> |
| <span id="555">555</span> |
| <span id="556">556</span> |
| <span id="557">557</span> |
| <span id="558">558</span> |
| <span id="559">559</span> |
| <span id="560">560</span> |
| <span id="561">561</span> |
| <span id="562">562</span> |
| <span id="563">563</span> |
| <span id="564">564</span> |
| <span id="565">565</span> |
| <span id="566">566</span> |
| <span id="567">567</span> |
| <span id="568">568</span> |
| <span id="569">569</span> |
| <span id="570">570</span> |
| <span id="571">571</span> |
| <span id="572">572</span> |
| <span id="573">573</span> |
| <span id="574">574</span> |
| <span id="575">575</span> |
| <span id="576">576</span> |
| <span id="577">577</span> |
| </pre><pre class="rust"><code><span class="doccomment">/*! |
| This module provides a regular expression printer for `Ast`. |
| */ |
| |
| </span><span class="kw">use </span>core::fmt; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::ast::{ |
| <span class="self">self</span>, |
| visitor::{<span class="self">self</span>, Visitor}, |
| Ast, |
| }; |
| |
| <span class="doccomment">/// A builder for constructing a printer. |
| /// |
| /// Note that since a printer doesn't have any configuration knobs, this type |
| /// remains unexported. |
| </span><span class="attribute">#[derive(Clone, Debug)] |
| </span><span class="kw">struct </span>PrinterBuilder { |
| _priv: (), |
| } |
| |
| <span class="kw">impl </span>Default <span class="kw">for </span>PrinterBuilder { |
| <span class="kw">fn </span>default() -> PrinterBuilder { |
| PrinterBuilder::new() |
| } |
| } |
| |
| <span class="kw">impl </span>PrinterBuilder { |
| <span class="kw">fn </span>new() -> PrinterBuilder { |
| PrinterBuilder { _priv: () } |
| } |
| |
| <span class="kw">fn </span>build(<span class="kw-2">&</span><span class="self">self</span>) -> Printer { |
| Printer { _priv: () } |
| } |
| } |
| |
| <span class="doccomment">/// A printer for a regular expression abstract syntax tree. |
| /// |
| /// A printer converts an abstract syntax tree (AST) to a regular expression |
| /// pattern string. This particular printer uses constant stack space and heap |
| /// space proportional to the size of the AST. |
| /// |
| /// This printer will not necessarily preserve the original formatting of the |
| /// regular expression pattern string. For example, all whitespace and comments |
| /// are ignored. |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub struct </span>Printer { |
| _priv: (), |
| } |
| |
| <span class="kw">impl </span>Printer { |
| <span class="doccomment">/// Create a new printer. |
| </span><span class="kw">pub fn </span>new() -> Printer { |
| PrinterBuilder::new().build() |
| } |
| |
| <span class="doccomment">/// Print the given `Ast` to the given writer. The writer must implement |
| /// `fmt::Write`. Typical implementations of `fmt::Write` that can be used |
| /// here are a `fmt::Formatter` (which is available in `fmt::Display` |
| /// implementations) or a `&mut String`. |
| </span><span class="kw">pub fn </span>print<W: fmt::Write>(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>Ast, wtr: W) -> fmt::Result { |
| visitor::visit(ast, Writer { wtr }) |
| } |
| } |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">struct </span>Writer<W> { |
| wtr: W, |
| } |
| |
| <span class="kw">impl</span><W: fmt::Write> Visitor <span class="kw">for </span>Writer<W> { |
| <span class="kw">type </span>Output = (); |
| <span class="kw">type </span><span class="prelude-val">Err </span>= fmt::Error; |
| |
| <span class="kw">fn </span>finish(<span class="self">self</span>) -> fmt::Result { |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>visit_pre(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>Ast) -> fmt::Result { |
| <span class="kw">match </span><span class="kw-2">*</span>ast { |
| Ast::Group(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_group_pre(x), |
| Ast::Class(ast::Class::Bracketed(<span class="kw-2">ref </span>x)) => { |
| <span class="self">self</span>.fmt_class_bracketed_pre(x) |
| } |
| <span class="kw">_ </span>=> <span class="prelude-val">Ok</span>(()), |
| } |
| } |
| |
| <span class="kw">fn </span>visit_post(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>Ast) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::Class; |
| |
| <span class="kw">match </span><span class="kw-2">*</span>ast { |
| Ast::Empty(<span class="kw">_</span>) => <span class="prelude-val">Ok</span>(()), |
| Ast::Flags(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_set_flags(x), |
| Ast::Literal(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_literal(x), |
| Ast::Dot(<span class="kw">_</span>) => <span class="self">self</span>.wtr.write_str(<span class="string">"."</span>), |
| Ast::Assertion(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_assertion(x), |
| Ast::Class(Class::Perl(<span class="kw-2">ref </span>x)) => <span class="self">self</span>.fmt_class_perl(x), |
| Ast::Class(Class::Unicode(<span class="kw-2">ref </span>x)) => <span class="self">self</span>.fmt_class_unicode(x), |
| Ast::Class(Class::Bracketed(<span class="kw-2">ref </span>x)) => { |
| <span class="self">self</span>.fmt_class_bracketed_post(x) |
| } |
| Ast::Repetition(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_repetition(x), |
| Ast::Group(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_group_post(x), |
| Ast::Alternation(<span class="kw">_</span>) => <span class="prelude-val">Ok</span>(()), |
| Ast::Concat(<span class="kw">_</span>) => <span class="prelude-val">Ok</span>(()), |
| } |
| } |
| |
| <span class="kw">fn </span>visit_alternation_in(<span class="kw-2">&mut </span><span class="self">self</span>) -> fmt::Result { |
| <span class="self">self</span>.wtr.write_str(<span class="string">"|"</span>) |
| } |
| |
| <span class="kw">fn </span>visit_class_set_item_pre( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| ast: <span class="kw-2">&</span>ast::ClassSetItem, |
| ) -> <span class="prelude-ty">Result</span><(), <span class="self">Self</span>::Err> { |
| <span class="kw">match </span><span class="kw-2">*</span>ast { |
| ast::ClassSetItem::Bracketed(<span class="kw-2">ref </span>x) => { |
| <span class="self">self</span>.fmt_class_bracketed_pre(x) |
| } |
| <span class="kw">_ </span>=> <span class="prelude-val">Ok</span>(()), |
| } |
| } |
| |
| <span class="kw">fn </span>visit_class_set_item_post( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| ast: <span class="kw-2">&</span>ast::ClassSetItem, |
| ) -> <span class="prelude-ty">Result</span><(), <span class="self">Self</span>::Err> { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::ClassSetItem::<span class="kw-2">*</span>; |
| |
| <span class="kw">match </span><span class="kw-2">*</span>ast { |
| Empty(<span class="kw">_</span>) => <span class="prelude-val">Ok</span>(()), |
| Literal(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_literal(x), |
| Range(<span class="kw-2">ref </span>x) => { |
| <span class="self">self</span>.fmt_literal(<span class="kw-2">&</span>x.start)<span class="question-mark">?</span>; |
| <span class="self">self</span>.wtr.write_str(<span class="string">"-"</span>)<span class="question-mark">?</span>; |
| <span class="self">self</span>.fmt_literal(<span class="kw-2">&</span>x.end)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| Ascii(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_class_ascii(x), |
| Unicode(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_class_unicode(x), |
| Perl(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_class_perl(x), |
| Bracketed(<span class="kw-2">ref </span>x) => <span class="self">self</span>.fmt_class_bracketed_post(x), |
| Union(<span class="kw">_</span>) => <span class="prelude-val">Ok</span>(()), |
| } |
| } |
| |
| <span class="kw">fn </span>visit_class_set_binary_op_in( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| ast: <span class="kw-2">&</span>ast::ClassSetBinaryOp, |
| ) -> <span class="prelude-ty">Result</span><(), <span class="self">Self</span>::Err> { |
| <span class="self">self</span>.fmt_class_set_binary_op_kind(<span class="kw-2">&</span>ast.kind) |
| } |
| } |
| |
| <span class="kw">impl</span><W: fmt::Write> Writer<W> { |
| <span class="kw">fn </span>fmt_group_pre(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>ast::Group) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::GroupKind::<span class="kw-2">*</span>; |
| <span class="kw">match </span>ast.kind { |
| CaptureIndex(<span class="kw">_</span>) => <span class="self">self</span>.wtr.write_str(<span class="string">"("</span>), |
| CaptureName { <span class="kw-2">ref </span>name, starts_with_p } => { |
| <span class="kw">let </span>start = <span class="kw">if </span>starts_with_p { <span class="string">"(?P<" </span>} <span class="kw">else </span>{ <span class="string">"(?<" </span>}; |
| <span class="self">self</span>.wtr.write_str(start)<span class="question-mark">?</span>; |
| <span class="self">self</span>.wtr.write_str(<span class="kw-2">&</span>name.name)<span class="question-mark">?</span>; |
| <span class="self">self</span>.wtr.write_str(<span class="string">">"</span>)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| NonCapturing(<span class="kw-2">ref </span>flags) => { |
| <span class="self">self</span>.wtr.write_str(<span class="string">"(?"</span>)<span class="question-mark">?</span>; |
| <span class="self">self</span>.fmt_flags(flags)<span class="question-mark">?</span>; |
| <span class="self">self</span>.wtr.write_str(<span class="string">":"</span>)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>fmt_group_post(<span class="kw-2">&mut </span><span class="self">self</span>, _ast: <span class="kw-2">&</span>ast::Group) -> fmt::Result { |
| <span class="self">self</span>.wtr.write_str(<span class="string">")"</span>) |
| } |
| |
| <span class="kw">fn </span>fmt_repetition(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>ast::Repetition) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::RepetitionKind::<span class="kw-2">*</span>; |
| <span class="kw">match </span>ast.op.kind { |
| ZeroOrOne <span class="kw">if </span>ast.greedy => <span class="self">self</span>.wtr.write_str(<span class="string">"?"</span>), |
| ZeroOrOne => <span class="self">self</span>.wtr.write_str(<span class="string">"??"</span>), |
| ZeroOrMore <span class="kw">if </span>ast.greedy => <span class="self">self</span>.wtr.write_str(<span class="string">"*"</span>), |
| ZeroOrMore => <span class="self">self</span>.wtr.write_str(<span class="string">"*?"</span>), |
| OneOrMore <span class="kw">if </span>ast.greedy => <span class="self">self</span>.wtr.write_str(<span class="string">"+"</span>), |
| OneOrMore => <span class="self">self</span>.wtr.write_str(<span class="string">"+?"</span>), |
| Range(<span class="kw-2">ref </span>x) => { |
| <span class="self">self</span>.fmt_repetition_range(x)<span class="question-mark">?</span>; |
| <span class="kw">if </span>!ast.greedy { |
| <span class="self">self</span>.wtr.write_str(<span class="string">"?"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>fmt_repetition_range( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| ast: <span class="kw-2">&</span>ast::RepetitionRange, |
| ) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::RepetitionRange::<span class="kw-2">*</span>; |
| <span class="kw">match </span><span class="kw-2">*</span>ast { |
| Exactly(x) => <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">"{{{}}}"</span>, x), |
| AtLeast(x) => <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">"{{{},}}"</span>, x), |
| Bounded(x, y) => <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">"{{{},{}}}"</span>, x, y), |
| } |
| } |
| |
| <span class="kw">fn </span>fmt_literal(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>ast::Literal) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::LiteralKind::<span class="kw-2">*</span>; |
| |
| <span class="kw">match </span>ast.kind { |
| Verbatim => <span class="self">self</span>.wtr.write_char(ast.c), |
| Meta | Superfluous => <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">r"\{}"</span>, ast.c), |
| Octal => <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">r"\{:o}"</span>, u32::from(ast.c)), |
| HexFixed(ast::HexLiteralKind::X) => { |
| <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">r"\x{:02X}"</span>, u32::from(ast.c)) |
| } |
| HexFixed(ast::HexLiteralKind::UnicodeShort) => { |
| <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">r"\u{:04X}"</span>, u32::from(ast.c)) |
| } |
| HexFixed(ast::HexLiteralKind::UnicodeLong) => { |
| <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">r"\U{:08X}"</span>, u32::from(ast.c)) |
| } |
| HexBrace(ast::HexLiteralKind::X) => { |
| <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">r"\x{{{:X}}}"</span>, u32::from(ast.c)) |
| } |
| HexBrace(ast::HexLiteralKind::UnicodeShort) => { |
| <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">r"\u{{{:X}}}"</span>, u32::from(ast.c)) |
| } |
| HexBrace(ast::HexLiteralKind::UnicodeLong) => { |
| <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">r"\U{{{:X}}}"</span>, u32::from(ast.c)) |
| } |
| Special(ast::SpecialLiteralKind::Bell) => { |
| <span class="self">self</span>.wtr.write_str(<span class="string">r"\a"</span>) |
| } |
| Special(ast::SpecialLiteralKind::FormFeed) => { |
| <span class="self">self</span>.wtr.write_str(<span class="string">r"\f"</span>) |
| } |
| Special(ast::SpecialLiteralKind::Tab) => <span class="self">self</span>.wtr.write_str(<span class="string">r"\t"</span>), |
| Special(ast::SpecialLiteralKind::LineFeed) => { |
| <span class="self">self</span>.wtr.write_str(<span class="string">r"\n"</span>) |
| } |
| Special(ast::SpecialLiteralKind::CarriageReturn) => { |
| <span class="self">self</span>.wtr.write_str(<span class="string">r"\r"</span>) |
| } |
| Special(ast::SpecialLiteralKind::VerticalTab) => { |
| <span class="self">self</span>.wtr.write_str(<span class="string">r"\v"</span>) |
| } |
| Special(ast::SpecialLiteralKind::Space) => { |
| <span class="self">self</span>.wtr.write_str(<span class="string">r"\ "</span>) |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>fmt_assertion(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>ast::Assertion) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::AssertionKind::<span class="kw-2">*</span>; |
| <span class="kw">match </span>ast.kind { |
| StartLine => <span class="self">self</span>.wtr.write_str(<span class="string">"^"</span>), |
| EndLine => <span class="self">self</span>.wtr.write_str(<span class="string">"$"</span>), |
| StartText => <span class="self">self</span>.wtr.write_str(<span class="string">r"\A"</span>), |
| EndText => <span class="self">self</span>.wtr.write_str(<span class="string">r"\z"</span>), |
| WordBoundary => <span class="self">self</span>.wtr.write_str(<span class="string">r"\b"</span>), |
| NotWordBoundary => <span class="self">self</span>.wtr.write_str(<span class="string">r"\B"</span>), |
| } |
| } |
| |
| <span class="kw">fn </span>fmt_set_flags(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>ast::SetFlags) -> fmt::Result { |
| <span class="self">self</span>.wtr.write_str(<span class="string">"(?"</span>)<span class="question-mark">?</span>; |
| <span class="self">self</span>.fmt_flags(<span class="kw-2">&</span>ast.flags)<span class="question-mark">?</span>; |
| <span class="self">self</span>.wtr.write_str(<span class="string">")"</span>)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>fmt_flags(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>ast::Flags) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::{Flag, FlagsItemKind}; |
| |
| <span class="kw">for </span>item <span class="kw">in </span><span class="kw-2">&</span>ast.items { |
| <span class="kw">match </span>item.kind { |
| FlagsItemKind::Negation => <span class="self">self</span>.wtr.write_str(<span class="string">"-"</span>), |
| FlagsItemKind::Flag(<span class="kw-2">ref </span>flag) => <span class="kw">match </span><span class="kw-2">*</span>flag { |
| Flag::CaseInsensitive => <span class="self">self</span>.wtr.write_str(<span class="string">"i"</span>), |
| Flag::MultiLine => <span class="self">self</span>.wtr.write_str(<span class="string">"m"</span>), |
| Flag::DotMatchesNewLine => <span class="self">self</span>.wtr.write_str(<span class="string">"s"</span>), |
| Flag::SwapGreed => <span class="self">self</span>.wtr.write_str(<span class="string">"U"</span>), |
| Flag::Unicode => <span class="self">self</span>.wtr.write_str(<span class="string">"u"</span>), |
| Flag::CRLF => <span class="self">self</span>.wtr.write_str(<span class="string">"R"</span>), |
| Flag::IgnoreWhitespace => <span class="self">self</span>.wtr.write_str(<span class="string">"x"</span>), |
| }, |
| }<span class="question-mark">?</span>; |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>fmt_class_bracketed_pre( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| ast: <span class="kw-2">&</span>ast::ClassBracketed, |
| ) -> fmt::Result { |
| <span class="kw">if </span>ast.negated { |
| <span class="self">self</span>.wtr.write_str(<span class="string">"[^"</span>) |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.wtr.write_str(<span class="string">"["</span>) |
| } |
| } |
| |
| <span class="kw">fn </span>fmt_class_bracketed_post( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| _ast: <span class="kw-2">&</span>ast::ClassBracketed, |
| ) -> fmt::Result { |
| <span class="self">self</span>.wtr.write_str(<span class="string">"]"</span>) |
| } |
| |
| <span class="kw">fn </span>fmt_class_set_binary_op_kind( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| ast: <span class="kw-2">&</span>ast::ClassSetBinaryOpKind, |
| ) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::ClassSetBinaryOpKind::<span class="kw-2">*</span>; |
| <span class="kw">match </span><span class="kw-2">*</span>ast { |
| Intersection => <span class="self">self</span>.wtr.write_str(<span class="string">"&&"</span>), |
| Difference => <span class="self">self</span>.wtr.write_str(<span class="string">"--"</span>), |
| SymmetricDifference => <span class="self">self</span>.wtr.write_str(<span class="string">"~~"</span>), |
| } |
| } |
| |
| <span class="kw">fn </span>fmt_class_perl(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>ast::ClassPerl) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::ClassPerlKind::<span class="kw-2">*</span>; |
| <span class="kw">match </span>ast.kind { |
| Digit <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">r"\D"</span>), |
| Digit => <span class="self">self</span>.wtr.write_str(<span class="string">r"\d"</span>), |
| Space <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">r"\S"</span>), |
| Space => <span class="self">self</span>.wtr.write_str(<span class="string">r"\s"</span>), |
| Word <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">r"\W"</span>), |
| Word => <span class="self">self</span>.wtr.write_str(<span class="string">r"\w"</span>), |
| } |
| } |
| |
| <span class="kw">fn </span>fmt_class_ascii(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>ast::ClassAscii) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::ClassAsciiKind::<span class="kw-2">*</span>; |
| <span class="kw">match </span>ast.kind { |
| Alnum <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^alnum:]"</span>), |
| Alnum => <span class="self">self</span>.wtr.write_str(<span class="string">"[:alnum:]"</span>), |
| Alpha <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^alpha:]"</span>), |
| Alpha => <span class="self">self</span>.wtr.write_str(<span class="string">"[:alpha:]"</span>), |
| Ascii <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^ascii:]"</span>), |
| Ascii => <span class="self">self</span>.wtr.write_str(<span class="string">"[:ascii:]"</span>), |
| Blank <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^blank:]"</span>), |
| Blank => <span class="self">self</span>.wtr.write_str(<span class="string">"[:blank:]"</span>), |
| Cntrl <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^cntrl:]"</span>), |
| Cntrl => <span class="self">self</span>.wtr.write_str(<span class="string">"[:cntrl:]"</span>), |
| Digit <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^digit:]"</span>), |
| Digit => <span class="self">self</span>.wtr.write_str(<span class="string">"[:digit:]"</span>), |
| Graph <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^graph:]"</span>), |
| Graph => <span class="self">self</span>.wtr.write_str(<span class="string">"[:graph:]"</span>), |
| Lower <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^lower:]"</span>), |
| Lower => <span class="self">self</span>.wtr.write_str(<span class="string">"[:lower:]"</span>), |
| Print <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^print:]"</span>), |
| Print => <span class="self">self</span>.wtr.write_str(<span class="string">"[:print:]"</span>), |
| Punct <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^punct:]"</span>), |
| Punct => <span class="self">self</span>.wtr.write_str(<span class="string">"[:punct:]"</span>), |
| Space <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^space:]"</span>), |
| Space => <span class="self">self</span>.wtr.write_str(<span class="string">"[:space:]"</span>), |
| Upper <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^upper:]"</span>), |
| Upper => <span class="self">self</span>.wtr.write_str(<span class="string">"[:upper:]"</span>), |
| Word <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^word:]"</span>), |
| Word => <span class="self">self</span>.wtr.write_str(<span class="string">"[:word:]"</span>), |
| Xdigit <span class="kw">if </span>ast.negated => <span class="self">self</span>.wtr.write_str(<span class="string">"[:^xdigit:]"</span>), |
| Xdigit => <span class="self">self</span>.wtr.write_str(<span class="string">"[:xdigit:]"</span>), |
| } |
| } |
| |
| <span class="kw">fn </span>fmt_class_unicode(<span class="kw-2">&mut </span><span class="self">self</span>, ast: <span class="kw-2">&</span>ast::ClassUnicode) -> fmt::Result { |
| <span class="kw">use </span><span class="kw">crate</span>::ast::ClassUnicodeKind::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::ast::ClassUnicodeOpKind::<span class="kw-2">*</span>; |
| |
| <span class="kw">if </span>ast.negated { |
| <span class="self">self</span>.wtr.write_str(<span class="string">r"\P"</span>)<span class="question-mark">?</span>; |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.wtr.write_str(<span class="string">r"\p"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">match </span>ast.kind { |
| OneLetter(c) => <span class="self">self</span>.wtr.write_char(c), |
| Named(<span class="kw-2">ref </span>x) => <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">"{{{}}}"</span>, x), |
| NamedValue { op: Equal, <span class="kw-2">ref </span>name, <span class="kw-2">ref </span>value } => { |
| <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">"{{{}={}}}"</span>, name, value) |
| } |
| NamedValue { op: Colon, <span class="kw-2">ref </span>name, <span class="kw-2">ref </span>value } => { |
| <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">"{{{}:{}}}"</span>, name, value) |
| } |
| NamedValue { op: NotEqual, <span class="kw-2">ref </span>name, <span class="kw-2">ref </span>value } => { |
| <span class="macro">write!</span>(<span class="self">self</span>.wtr, <span class="string">"{{{}!={}}}"</span>, name, value) |
| } |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use </span>alloc::string::String; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::ast::parse::ParserBuilder; |
| |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| |
| <span class="kw">fn </span>roundtrip(given: <span class="kw-2">&</span>str) { |
| roundtrip_with(|b| b, given); |
| } |
| |
| <span class="kw">fn </span>roundtrip_with<F>(<span class="kw-2">mut </span>f: F, given: <span class="kw-2">&</span>str) |
| <span class="kw">where |
| </span>F: FnMut(<span class="kw-2">&mut </span>ParserBuilder) -> <span class="kw-2">&mut </span>ParserBuilder, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>builder = ParserBuilder::new(); |
| f(<span class="kw-2">&mut </span>builder); |
| <span class="kw">let </span>ast = builder.build().parse(given).unwrap(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>printer = Printer::new(); |
| <span class="kw">let </span><span class="kw-2">mut </span>dst = String::new(); |
| printer.print(<span class="kw-2">&</span>ast, <span class="kw-2">&mut </span>dst).unwrap(); |
| <span class="macro">assert_eq!</span>(given, dst); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>print_literal() { |
| roundtrip(<span class="string">"a"</span>); |
| roundtrip(<span class="string">r"\["</span>); |
| roundtrip_with(|b| b.octal(<span class="bool-val">true</span>), <span class="string">r"\141"</span>); |
| roundtrip(<span class="string">r"\x61"</span>); |
| roundtrip(<span class="string">r"\x7F"</span>); |
| roundtrip(<span class="string">r"\u0061"</span>); |
| roundtrip(<span class="string">r"\U00000061"</span>); |
| roundtrip(<span class="string">r"\x{61}"</span>); |
| roundtrip(<span class="string">r"\x{7F}"</span>); |
| roundtrip(<span class="string">r"\u{61}"</span>); |
| roundtrip(<span class="string">r"\U{61}"</span>); |
| |
| roundtrip(<span class="string">r"\a"</span>); |
| roundtrip(<span class="string">r"\f"</span>); |
| roundtrip(<span class="string">r"\t"</span>); |
| roundtrip(<span class="string">r"\n"</span>); |
| roundtrip(<span class="string">r"\r"</span>); |
| roundtrip(<span class="string">r"\v"</span>); |
| roundtrip(<span class="string">r"(?x)\ "</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>print_dot() { |
| roundtrip(<span class="string">"."</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>print_concat() { |
| roundtrip(<span class="string">"ab"</span>); |
| roundtrip(<span class="string">"abcde"</span>); |
| roundtrip(<span class="string">"a(bcd)ef"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>print_alternation() { |
| roundtrip(<span class="string">"a|b"</span>); |
| roundtrip(<span class="string">"a|b|c|d|e"</span>); |
| roundtrip(<span class="string">"|a|b|c|d|e"</span>); |
| roundtrip(<span class="string">"|a|b|c|d|e|"</span>); |
| roundtrip(<span class="string">"a(b|c|d)|e|f"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>print_assertion() { |
| roundtrip(<span class="string">r"^"</span>); |
| roundtrip(<span class="string">r"$"</span>); |
| roundtrip(<span class="string">r"\A"</span>); |
| roundtrip(<span class="string">r"\z"</span>); |
| roundtrip(<span class="string">r"\b"</span>); |
| roundtrip(<span class="string">r"\B"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>print_repetition() { |
| roundtrip(<span class="string">"a?"</span>); |
| roundtrip(<span class="string">"a??"</span>); |
| roundtrip(<span class="string">"a*"</span>); |
| roundtrip(<span class="string">"a*?"</span>); |
| roundtrip(<span class="string">"a+"</span>); |
| roundtrip(<span class="string">"a+?"</span>); |
| roundtrip(<span class="string">"a{5}"</span>); |
| roundtrip(<span class="string">"a{5}?"</span>); |
| roundtrip(<span class="string">"a{5,}"</span>); |
| roundtrip(<span class="string">"a{5,}?"</span>); |
| roundtrip(<span class="string">"a{5,10}"</span>); |
| roundtrip(<span class="string">"a{5,10}?"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>print_flags() { |
| roundtrip(<span class="string">"(?i)"</span>); |
| roundtrip(<span class="string">"(?-i)"</span>); |
| roundtrip(<span class="string">"(?s-i)"</span>); |
| roundtrip(<span class="string">"(?-si)"</span>); |
| roundtrip(<span class="string">"(?siUmux)"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>print_group() { |
| roundtrip(<span class="string">"(?i:a)"</span>); |
| roundtrip(<span class="string">"(?P<foo>a)"</span>); |
| roundtrip(<span class="string">"(?<foo>a)"</span>); |
| roundtrip(<span class="string">"(a)"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>print_class() { |
| roundtrip(<span class="string">r"[abc]"</span>); |
| roundtrip(<span class="string">r"[a-z]"</span>); |
| roundtrip(<span class="string">r"[^a-z]"</span>); |
| roundtrip(<span class="string">r"[a-z0-9]"</span>); |
| roundtrip(<span class="string">r"[-a-z0-9]"</span>); |
| roundtrip(<span class="string">r"[-a-z0-9]"</span>); |
| roundtrip(<span class="string">r"[a-z0-9---]"</span>); |
| roundtrip(<span class="string">r"[a-z&&m-n]"</span>); |
| roundtrip(<span class="string">r"[[a-z&&m-n]]"</span>); |
| roundtrip(<span class="string">r"[a-z--m-n]"</span>); |
| roundtrip(<span class="string">r"[a-z~~m-n]"</span>); |
| roundtrip(<span class="string">r"[a-z[0-9]]"</span>); |
| roundtrip(<span class="string">r"[a-z[^0-9]]"</span>); |
| |
| roundtrip(<span class="string">r"\d"</span>); |
| roundtrip(<span class="string">r"\D"</span>); |
| roundtrip(<span class="string">r"\s"</span>); |
| roundtrip(<span class="string">r"\S"</span>); |
| roundtrip(<span class="string">r"\w"</span>); |
| roundtrip(<span class="string">r"\W"</span>); |
| |
| roundtrip(<span class="string">r"[[:alnum:]]"</span>); |
| roundtrip(<span class="string">r"[[:^alnum:]]"</span>); |
| roundtrip(<span class="string">r"[[:alpha:]]"</span>); |
| roundtrip(<span class="string">r"[[:^alpha:]]"</span>); |
| roundtrip(<span class="string">r"[[:ascii:]]"</span>); |
| roundtrip(<span class="string">r"[[:^ascii:]]"</span>); |
| roundtrip(<span class="string">r"[[:blank:]]"</span>); |
| roundtrip(<span class="string">r"[[:^blank:]]"</span>); |
| roundtrip(<span class="string">r"[[:cntrl:]]"</span>); |
| roundtrip(<span class="string">r"[[:^cntrl:]]"</span>); |
| roundtrip(<span class="string">r"[[:digit:]]"</span>); |
| roundtrip(<span class="string">r"[[:^digit:]]"</span>); |
| roundtrip(<span class="string">r"[[:graph:]]"</span>); |
| roundtrip(<span class="string">r"[[:^graph:]]"</span>); |
| roundtrip(<span class="string">r"[[:lower:]]"</span>); |
| roundtrip(<span class="string">r"[[:^lower:]]"</span>); |
| roundtrip(<span class="string">r"[[:print:]]"</span>); |
| roundtrip(<span class="string">r"[[:^print:]]"</span>); |
| roundtrip(<span class="string">r"[[:punct:]]"</span>); |
| roundtrip(<span class="string">r"[[:^punct:]]"</span>); |
| roundtrip(<span class="string">r"[[:space:]]"</span>); |
| roundtrip(<span class="string">r"[[:^space:]]"</span>); |
| roundtrip(<span class="string">r"[[:upper:]]"</span>); |
| roundtrip(<span class="string">r"[[:^upper:]]"</span>); |
| roundtrip(<span class="string">r"[[:word:]]"</span>); |
| roundtrip(<span class="string">r"[[:^word:]]"</span>); |
| roundtrip(<span class="string">r"[[:xdigit:]]"</span>); |
| roundtrip(<span class="string">r"[[:^xdigit:]]"</span>); |
| |
| roundtrip(<span class="string">r"\pL"</span>); |
| roundtrip(<span class="string">r"\PL"</span>); |
| roundtrip(<span class="string">r"\p{L}"</span>); |
| roundtrip(<span class="string">r"\P{L}"</span>); |
| roundtrip(<span class="string">r"\p{X=Y}"</span>); |
| roundtrip(<span class="string">r"\P{X=Y}"</span>); |
| roundtrip(<span class="string">r"\p{X:Y}"</span>); |
| roundtrip(<span class="string">r"\P{X:Y}"</span>); |
| roundtrip(<span class="string">r"\p{X!=Y}"</span>); |
| roundtrip(<span class="string">r"\P{X!=Y}"</span>); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="regex_syntax" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
