edg-l/edlang
1
1
Fork 0
mirror of https://github.com/edg-l/edlang.git synced 2024-11-23 08:28:24 +00:00
Code Issues Packages Projects Releases Wiki Activity
edlang/regex_syntax/ast/enum.ErrorKind.html
edg-l bd3cf7dbe0 deploy: 84257b6cc7
2024-02-14 07:58:46 +00:00

132 lines
49 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<!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="The type of an error that occurred while building an AST."><title>ErrorKind in regex_syntax::ast - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="regex_syntax" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc enum"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">&#9776;</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../regex_syntax/index.html">regex_syntax</a><span class="version">0.8.2</span></h2></div><h2 class="location"><a href="#">ErrorKind</a></h2><div class="sidebar-elems"><section><h3><a href="#variants">Variants</a></h3><ul class="block variant"><li><a href="#variant.CaptureLimitExceeded">CaptureLimitExceeded</a></li><li><a href="#variant.ClassEscapeInvalid">ClassEscapeInvalid</a></li><li><a href="#variant.ClassRangeInvalid">ClassRangeInvalid</a></li><li><a href="#variant.ClassRangeLiteral">ClassRangeLiteral</a></li><li><a href="#variant.ClassUnclosed">ClassUnclosed</a></li><li><a href="#variant.DecimalEmpty">DecimalEmpty</a></li><li><a href="#variant.DecimalInvalid">DecimalInvalid</a></li><li><a href="#variant.EscapeHexEmpty">EscapeHexEmpty</a></li><li><a href="#variant.EscapeHexInvalid">EscapeHexInvalid</a></li><li><a href="#variant.EscapeHexInvalidDigit">EscapeHexInvalidDigit</a></li><li><a href="#variant.EscapeUnexpectedEof">EscapeUnexpectedEof</a></li><li><a href="#variant.EscapeUnrecognized">EscapeUnrecognized</a></li><li><a href="#variant.FlagDanglingNegation">FlagDanglingNegation</a></li><li><a href="#variant.FlagDuplicate">FlagDuplicate</a></li><li><a href="#variant.FlagRepeatedNegation">FlagRepeatedNegation</a></li><li><a href="#variant.FlagUnexpectedEof">FlagUnexpectedEof</a></li><li><a href="#variant.FlagUnrecognized">FlagUnrecognized</a></li><li><a href="#variant.GroupNameDuplicate">GroupNameDuplicate</a></li><li><a href="#variant.GroupNameEmpty">GroupNameEmpty</a></li><li><a href="#variant.GroupNameInvalid">GroupNameInvalid</a></li><li><a href="#variant.GroupNameUnexpectedEof">GroupNameUnexpectedEof</a></li><li><a href="#variant.GroupUnclosed">GroupUnclosed</a></li><li><a href="#variant.GroupUnopened">GroupUnopened</a></li><li><a href="#variant.NestLimitExceeded">NestLimitExceeded</a></li><li><a href="#variant.RepetitionCountDecimalEmpty">RepetitionCountDecimalEmpty</a></li><li><a href="#variant.RepetitionCountInvalid">RepetitionCountInvalid</a></li><li><a href="#variant.RepetitionCountUnclosed">RepetitionCountUnclosed</a></li><li><a href="#variant.RepetitionMissing">RepetitionMissing</a></li><li><a href="#variant.SpecialWordBoundaryUnclosed">SpecialWordBoundaryUnclosed</a></li><li><a href="#variant.SpecialWordBoundaryUnrecognized">SpecialWordBoundaryUnrecognized</a></li><li><a href="#variant.SpecialWordOrRepetitionUnexpectedEof">SpecialWordOrRepetitionUnexpectedEof</a></li><li><a href="#variant.UnicodeClassInvalid">UnicodeClassInvalid</a></li><li><a href="#variant.UnsupportedBackreference">UnsupportedBackreference</a></li><li><a href="#variant.UnsupportedLookAround">UnsupportedLookAround</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Clone-for-ErrorKind">Clone</a></li><li><a href="#impl-Debug-for-ErrorKind">Debug</a></li><li><a href="#impl-Display-for-ErrorKind">Display</a></li><li><a href="#impl-Eq-for-ErrorKind">Eq</a></li><li><a href="#impl-PartialEq-for-ErrorKind">PartialEq</a></li><li><a href="#impl-StructuralEq-for-ErrorKind">StructuralEq</a></li><li><a href="#impl-StructuralPartialEq-for-ErrorKind">StructuralPartialEq</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-RefUnwindSafe-for-ErrorKind">RefUnwindSafe</a></li><li><a href="#impl-Send-for-ErrorKind">Send</a></li><li><a href="#impl-Sync-for-ErrorKind">Sync</a></li><li><a href="#impl-Unpin-for-ErrorKind">Unpin</a></li><li><a href="#impl-UnwindSafe-for-ErrorKind">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T">Borrow&lt;T&gt;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T">BorrowMut&lt;T&gt;</a></li><li><a href="#impl-From%3CT%3E-for-T">From&lt;T&gt;</a></li><li><a href="#impl-Into%3CU%3E-for-T">Into&lt;U&gt;</a></li><li><a href="#impl-ToOwned-for-T">ToOwned</a></li><li><a href="#impl-ToString-for-T">ToString</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T">TryFrom&lt;U&gt;</a></li><li><a href="#impl-TryInto%3CU%3E-for-T">TryInto&lt;U&gt;</a></li></ul></section><h2><a href="index.html">In regex_syntax::ast</a></h2></div></nav><div class="sidebar-resizer"></div>
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../regex_syntax/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Enum <a href="../index.html">regex_syntax</a>::<wbr><a href="index.html">ast</a>::<wbr><a class="enum" href="#">ErrorKind</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../../src/regex_syntax/ast/mod.rs.html#75-190">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code><div class="code-attribute">#[non_exhaustive]</div>pub enum ErrorKind {
<details class="toggle type-contents-toggle"><summary class="hideme"><span>Show 34 variants</span></summary> CaptureLimitExceeded,
ClassEscapeInvalid,
ClassRangeInvalid,
ClassRangeLiteral,
ClassUnclosed,
DecimalEmpty,
DecimalInvalid,
EscapeHexEmpty,
EscapeHexInvalid,
EscapeHexInvalidDigit,
EscapeUnexpectedEof,
EscapeUnrecognized,
FlagDanglingNegation,
FlagDuplicate {
original: <a class="struct" href="struct.Span.html" title="struct regex_syntax::ast::Span">Span</a>,
},
FlagRepeatedNegation {
original: <a class="struct" href="struct.Span.html" title="struct regex_syntax::ast::Span">Span</a>,
},
FlagUnexpectedEof,
FlagUnrecognized,
GroupNameDuplicate {
original: <a class="struct" href="struct.Span.html" title="struct regex_syntax::ast::Span">Span</a>,
},
GroupNameEmpty,
GroupNameInvalid,
GroupNameUnexpectedEof,
GroupUnclosed,
GroupUnopened,
NestLimitExceeded(<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.u32.html">u32</a>),
RepetitionCountInvalid,
RepetitionCountDecimalEmpty,
RepetitionCountUnclosed,
RepetitionMissing,
SpecialWordBoundaryUnclosed,
SpecialWordBoundaryUnrecognized,
SpecialWordOrRepetitionUnexpectedEof,
UnicodeClassInvalid,
UnsupportedBackreference,
UnsupportedLookAround,
</details>}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>The type of an error that occurred while building an AST.</p>
<p>This error type is marked as <code>non_exhaustive</code>. This means that adding a
new variant is not considered a breaking change.</p>
</div></details><h2 id="variants" class="variants section-header">Variants (Non-exhaustive)<a href="#variants" class="anchor">§</a></h2><details class="toggle non-exhaustive"><summary class="hideme"><span>This enum is marked as non-exhaustive</span></summary><div class="docblock">Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.</div></details><div class="variants"><section id="variant.CaptureLimitExceeded" class="variant"><a href="#variant.CaptureLimitExceeded" class="anchor">§</a><h3 class="code-header">CaptureLimitExceeded</h3></section><div class="docblock"><p>The capturing group limit was exceeded.</p>
<p>Note that this represents a limit on the total number of capturing
groups in a regex and not necessarily the number of nested capturing
groups. That is, the nest limit can be low and it is still possible for
this error to occur.</p>
</div><section id="variant.ClassEscapeInvalid" class="variant"><a href="#variant.ClassEscapeInvalid" class="anchor">§</a><h3 class="code-header">ClassEscapeInvalid</h3></section><div class="docblock"><p>An invalid escape sequence was found in a character class set.</p>
</div><section id="variant.ClassRangeInvalid" class="variant"><a href="#variant.ClassRangeInvalid" class="anchor">§</a><h3 class="code-header">ClassRangeInvalid</h3></section><div class="docblock"><p>An invalid character class range was found. An invalid range is any
range where the start is greater than the end.</p>
</div><section id="variant.ClassRangeLiteral" class="variant"><a href="#variant.ClassRangeLiteral" class="anchor">§</a><h3 class="code-header">ClassRangeLiteral</h3></section><div class="docblock"><p>An invalid range boundary was found in a character class. Range
boundaries must be a single literal codepoint, but this error indicates
that something else was found, such as a nested class.</p>
</div><section id="variant.ClassUnclosed" class="variant"><a href="#variant.ClassUnclosed" class="anchor">§</a><h3 class="code-header">ClassUnclosed</h3></section><div class="docblock"><p>An opening <code>[</code> was found with no corresponding closing <code>]</code>.</p>
</div><section id="variant.DecimalEmpty" class="variant"><a href="#variant.DecimalEmpty" class="anchor">§</a><h3 class="code-header">DecimalEmpty</h3></section><div class="docblock"><p>Note that this error variant is no longer used. Namely, a decimal
number can only appear as a repetition quantifier. When the number
in a repetition quantifier is empty, then it gets its own specialized
error, <code>RepetitionCountDecimalEmpty</code>.</p>
</div><section id="variant.DecimalInvalid" class="variant"><a href="#variant.DecimalInvalid" class="anchor">§</a><h3 class="code-header">DecimalInvalid</h3></section><div class="docblock"><p>An invalid decimal number was given where one was expected.</p>
</div><section id="variant.EscapeHexEmpty" class="variant"><a href="#variant.EscapeHexEmpty" class="anchor">§</a><h3 class="code-header">EscapeHexEmpty</h3></section><div class="docblock"><p>A bracketed hex literal was empty.</p>
</div><section id="variant.EscapeHexInvalid" class="variant"><a href="#variant.EscapeHexInvalid" class="anchor">§</a><h3 class="code-header">EscapeHexInvalid</h3></section><div class="docblock"><p>A bracketed hex literal did not correspond to a Unicode scalar value.</p>
</div><section id="variant.EscapeHexInvalidDigit" class="variant"><a href="#variant.EscapeHexInvalidDigit" class="anchor">§</a><h3 class="code-header">EscapeHexInvalidDigit</h3></section><div class="docblock"><p>An invalid hexadecimal digit was found.</p>
</div><section id="variant.EscapeUnexpectedEof" class="variant"><a href="#variant.EscapeUnexpectedEof" class="anchor">§</a><h3 class="code-header">EscapeUnexpectedEof</h3></section><div class="docblock"><p>EOF was found before an escape sequence was completed.</p>
</div><section id="variant.EscapeUnrecognized" class="variant"><a href="#variant.EscapeUnrecognized" class="anchor">§</a><h3 class="code-header">EscapeUnrecognized</h3></section><div class="docblock"><p>An unrecognized escape sequence.</p>
</div><section id="variant.FlagDanglingNegation" class="variant"><a href="#variant.FlagDanglingNegation" class="anchor">§</a><h3 class="code-header">FlagDanglingNegation</h3></section><div class="docblock"><p>A dangling negation was used when setting flags, e.g., <code>i-</code>.</p>
</div><section id="variant.FlagDuplicate" class="variant"><a href="#variant.FlagDuplicate" class="anchor">§</a><h3 class="code-header">FlagDuplicate</h3></section><div class="sub-variant" id="variant.FlagDuplicate.fields"><h4>Fields</h4><div class="sub-variant-field"><span id="variant.FlagDuplicate.field.original" class="section-header"><a href="#variant.FlagDuplicate.field.original" class="anchor field">§</a><code>original: <a class="struct" href="struct.Span.html" title="struct regex_syntax::ast::Span">Span</a></code></span><div class="docblock"><p>The position of the original flag. The error position
points to the duplicate flag.</p>
</div></div></div><div class="docblock"><p>A flag was used twice, e.g., <code>i-i</code>.</p>
</div><section id="variant.FlagRepeatedNegation" class="variant"><a href="#variant.FlagRepeatedNegation" class="anchor">§</a><h3 class="code-header">FlagRepeatedNegation</h3></section><div class="sub-variant" id="variant.FlagRepeatedNegation.fields"><h4>Fields</h4><div class="sub-variant-field"><span id="variant.FlagRepeatedNegation.field.original" class="section-header"><a href="#variant.FlagRepeatedNegation.field.original" class="anchor field">§</a><code>original: <a class="struct" href="struct.Span.html" title="struct regex_syntax::ast::Span">Span</a></code></span><div class="docblock"><p>The position of the original negation operator. The error position
points to the duplicate negation operator.</p>
</div></div></div><div class="docblock"><p>The negation operator was used twice, e.g., <code>-i-s</code>.</p>
</div><section id="variant.FlagUnexpectedEof" class="variant"><a href="#variant.FlagUnexpectedEof" class="anchor">§</a><h3 class="code-header">FlagUnexpectedEof</h3></section><div class="docblock"><p>Expected a flag but got EOF, e.g., <code>(?</code>.</p>
</div><section id="variant.FlagUnrecognized" class="variant"><a href="#variant.FlagUnrecognized" class="anchor">§</a><h3 class="code-header">FlagUnrecognized</h3></section><div class="docblock"><p>Unrecognized flag, e.g., <code>a</code>.</p>
</div><section id="variant.GroupNameDuplicate" class="variant"><a href="#variant.GroupNameDuplicate" class="anchor">§</a><h3 class="code-header">GroupNameDuplicate</h3></section><div class="sub-variant" id="variant.GroupNameDuplicate.fields"><h4>Fields</h4><div class="sub-variant-field"><span id="variant.GroupNameDuplicate.field.original" class="section-header"><a href="#variant.GroupNameDuplicate.field.original" class="anchor field">§</a><code>original: <a class="struct" href="struct.Span.html" title="struct regex_syntax::ast::Span">Span</a></code></span><div class="docblock"><p>The position of the initial occurrence of the capture name. The
error position itself points to the duplicate occurrence.</p>
</div></div></div><div class="docblock"><p>A duplicate capture name was found.</p>
</div><section id="variant.GroupNameEmpty" class="variant"><a href="#variant.GroupNameEmpty" class="anchor">§</a><h3 class="code-header">GroupNameEmpty</h3></section><div class="docblock"><p>A capture group name is empty, e.g., <code>(?P&lt;&gt;abc)</code>.</p>
</div><section id="variant.GroupNameInvalid" class="variant"><a href="#variant.GroupNameInvalid" class="anchor">§</a><h3 class="code-header">GroupNameInvalid</h3></section><div class="docblock"><p>An invalid character was seen for a capture group name. This includes
errors where the first character is a digit (even though subsequent
characters are allowed to be digits).</p>
</div><section id="variant.GroupNameUnexpectedEof" class="variant"><a href="#variant.GroupNameUnexpectedEof" class="anchor">§</a><h3 class="code-header">GroupNameUnexpectedEof</h3></section><div class="docblock"><p>A closing <code>&gt;</code> could not be found for a capture group name.</p>
</div><section id="variant.GroupUnclosed" class="variant"><a href="#variant.GroupUnclosed" class="anchor">§</a><h3 class="code-header">GroupUnclosed</h3></section><div class="docblock"><p>An unclosed group, e.g., <code>(ab</code>.</p>
<p>The span of this error corresponds to the unclosed parenthesis.</p>
</div><section id="variant.GroupUnopened" class="variant"><a href="#variant.GroupUnopened" class="anchor">§</a><h3 class="code-header">GroupUnopened</h3></section><div class="docblock"><p>An unopened group, e.g., <code>ab)</code>.</p>
</div><section id="variant.NestLimitExceeded" class="variant"><a href="#variant.NestLimitExceeded" class="anchor">§</a><h3 class="code-header">NestLimitExceeded(<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.u32.html">u32</a>)</h3></section><div class="docblock"><p>The nest limit was exceeded. The limit stored here is the limit
configured in the parser.</p>
</div><section id="variant.RepetitionCountInvalid" class="variant"><a href="#variant.RepetitionCountInvalid" class="anchor">§</a><h3 class="code-header">RepetitionCountInvalid</h3></section><div class="docblock"><p>The range provided in a counted repetition operator is invalid. The
range is invalid if the start is greater than the end.</p>
</div><section id="variant.RepetitionCountDecimalEmpty" class="variant"><a href="#variant.RepetitionCountDecimalEmpty" class="anchor">§</a><h3 class="code-header">RepetitionCountDecimalEmpty</h3></section><div class="docblock"><p>An opening <code>{</code> was not followed by a valid decimal value.
For example, <code>x{}</code> or <code>x{]}</code> would fail.</p>
</div><section id="variant.RepetitionCountUnclosed" class="variant"><a href="#variant.RepetitionCountUnclosed" class="anchor">§</a><h3 class="code-header">RepetitionCountUnclosed</h3></section><div class="docblock"><p>An opening <code>{</code> was found with no corresponding closing <code>}</code>.</p>
</div><section id="variant.RepetitionMissing" class="variant"><a href="#variant.RepetitionMissing" class="anchor">§</a><h3 class="code-header">RepetitionMissing</h3></section><div class="docblock"><p>A repetition operator was applied to a missing sub-expression. This
occurs, for example, in the regex consisting of just a <code>*</code> or even
<code>(?i)*</code>. It is, however, possible to create a repetition operating on
an empty sub-expression. For example, <code>()*</code> is still considered valid.</p>
</div><section id="variant.SpecialWordBoundaryUnclosed" class="variant"><a href="#variant.SpecialWordBoundaryUnclosed" class="anchor">§</a><h3 class="code-header">SpecialWordBoundaryUnclosed</h3></section><div class="docblock"><p>The special word boundary syntax, <code>\b{something}</code>, was used, but
either EOF without <code>}</code> was seen, or an invalid character in the
braces was seen.</p>
</div><section id="variant.SpecialWordBoundaryUnrecognized" class="variant"><a href="#variant.SpecialWordBoundaryUnrecognized" class="anchor">§</a><h3 class="code-header">SpecialWordBoundaryUnrecognized</h3></section><div class="docblock"><p>The special word boundary syntax, <code>\b{something}</code>, was used, but
<code>something</code> was not recognized as a valid word boundary kind.</p>
</div><section id="variant.SpecialWordOrRepetitionUnexpectedEof" class="variant"><a href="#variant.SpecialWordOrRepetitionUnexpectedEof" class="anchor">§</a><h3 class="code-header">SpecialWordOrRepetitionUnexpectedEof</h3></section><div class="docblock"><p>The syntax <code>\b{</code> was observed, but afterwards the end of the pattern
was observed without being able to tell whether it was meant to be a
bounded repetition on the <code>\b</code> or the beginning of a special word
boundary assertion.</p>
</div><section id="variant.UnicodeClassInvalid" class="variant"><a href="#variant.UnicodeClassInvalid" class="anchor">§</a><h3 class="code-header">UnicodeClassInvalid</h3></section><div class="docblock"><p>The Unicode class is not valid. This typically occurs when a <code>\p</code> is
followed by something other than a <code>{</code>.</p>
</div><section id="variant.UnsupportedBackreference" class="variant"><a href="#variant.UnsupportedBackreference" class="anchor">§</a><h3 class="code-header">UnsupportedBackreference</h3></section><div class="docblock"><p>When octal support is disabled, this error is produced when an octal
escape is used. The octal escape is assumed to be an invocation of
a backreference, which is the common case.</p>
</div><section id="variant.UnsupportedLookAround" class="variant"><a href="#variant.UnsupportedLookAround" class="anchor">§</a><h3 class="code-header">UnsupportedLookAround</h3></section><div class="docblock"><p>When syntax similar to PCRE’s look-around is used, this error is
returned. Some example syntaxes that are rejected include, but are
not necessarily limited to, <code>(?=re)</code>, <code>(?!re)</code>, <code>(?&lt;=re)</code> and
<code>(?&lt;!re)</code>. Note that all of these syntaxes are otherwise invalid; this
error is used to improve the user experience.</p>
</div></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Clone-for-ErrorKind" class="impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#73">source</a><a href="#impl-Clone-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#73">source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&amp;self) -&gt; <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#tymethod.clone">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/clone.rs.html#169">source</a></span><a href="#method.clone_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&amp;mut self, source: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;Self</a>)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#method.clone_from">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-ErrorKind" class="impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#73">source</a><a href="#impl-Debug-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt-1" class="method trait-impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#73">source</a><a href="#method.fmt-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Display-for-ErrorKind" class="impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#201-311">source</a><a href="#impl-Display-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Display.html" title="trait core::fmt::Display">Display</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#202-310">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Display.html#tymethod.fmt" class="fn">fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Display.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-PartialEq-for-ErrorKind" class="impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#73">source</a><a href="#impl-PartialEq-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.eq" class="method trait-impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#73">source</a><a href="#method.eq" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html#tymethod.eq" class="fn">eq</a>(&amp;self, other: &amp;<a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used
by <code>==</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.ne" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#242">source</a></span><a href="#method.ne" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html#method.ne" class="fn">ne</a>(&amp;self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;Rhs</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests for <code>!=</code>. The default implementation is almost always
sufficient, and should not be overridden without very good reason.</div></details></div></details><section id="impl-Eq-for-ErrorKind" class="impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#73">source</a><a href="#impl-Eq-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section><section id="impl-StructuralEq-for-ErrorKind" class="impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#73">source</a><a href="#impl-StructuralEq-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.StructuralEq.html" title="trait core::marker::StructuralEq">StructuralEq</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section><section id="impl-StructuralPartialEq-for-ErrorKind" class="impl"><a class="src rightside" href="../../src/regex_syntax/ast/mod.rs.html#73">source</a><a href="#impl-StructuralPartialEq-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.StructuralPartialEq.html" title="trait core::marker::StructuralPartialEq">StructuralPartialEq</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-ErrorKind" class="impl"><a href="#impl-RefUnwindSafe-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section><section id="impl-Send-for-ErrorKind" class="impl"><a href="#impl-Send-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section><section id="impl-Sync-for-ErrorKind" class="impl"><a href="#impl-Sync-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section><section id="impl-Unpin-for-ErrorKind" class="impl"><a href="#impl-Unpin-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section><section id="impl-UnwindSafe-for-ErrorKind" class="impl"><a href="#impl-UnwindSafe-for-ErrorKind" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="enum" href="enum.ErrorKind.html" title="enum regex_syntax::ast::ErrorKind">ErrorKind</a></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#140">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#141">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#208">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#210">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#216">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#217">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#763">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#766">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -&gt; T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#747-749">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#756">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -&gt; U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
<p>That is, this conversion is whatever the implementation of
<code><a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for U</code> chooses to do.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-ToOwned-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#83-85">source</a><a href="#impl-ToOwned-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl"><a href="#associatedtype.Owned" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'>The resulting type after obtaining ownership.</div></details><details class="toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#88">source</a><a href="#method.to_owned" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fn">to_owned</a>(&amp;self) -&gt; T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#92">source</a><a href="#method.clone_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fn">clone_into</a>(&amp;self, target: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&amp;mut T</a>)</h4></section></summary><div class='docblock'>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-ToString-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/string.rs.html#2600">source</a><a href="#impl-ToString-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/alloc/string/trait.ToString.html" title="trait alloc::string::ToString">ToString</a> for T<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Display.html" title="trait core::fmt::Display">Display</a> + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.to_string" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/string.rs.html#2606">source</a><a href="#method.to_string" class="anchor">§</a><h4 class="code-header">default fn <a href="https://doc.rust-lang.org/1.76.0/alloc/string/trait.ToString.html#tymethod.to_string" class="fn">to_string</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.76.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a></h4></section></summary><div class='docblock'>Converts the given value to a <code>String</code>. <a href="https://doc.rust-lang.org/1.76.0/alloc/string/trait.ToString.html#tymethod.to_string">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#803-805">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#810">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#788-790">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#795">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html>
Reference in a new issue View git blame Copy permalink