112 lines
2.8 KiB
Markdown
112 lines
2.8 KiB
Markdown
[re.submatch.members]
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# 28 Text processing library [[text]](./#text)
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## 28.6 Regular expressions library [[re]](re#submatch.members)
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### 28.6.8 Class template sub_match [[re.submatch]](re.submatch#members)
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#### 28.6.8.2 Members [re.submatch.members]
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[ð](#lib:sub_match,constructor)
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`constexpr sub_match();
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`
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10878)
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*Effects*: Value-initializes the pair base class subobject and the membermatched[.](#1.sentence-1)
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[ð](#lib:sub_match,length)
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`difference_type length() const;
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`
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10890)
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*Returns*: matched ? distance(first, second) : 0[.](#2.sentence-1)
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[ð](#lib:operator_basic_string,sub_match)
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`operator string_type() const;
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`
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[3](#3)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10901)
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*Returns*: matched ? string_type(first, second) : string_type()[.](#3.sentence-1)
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[ð](#lib:sub_match,str)
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`string_type str() const;
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`
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[4](#4)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10912)
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*Returns*: matched ? string_type(first, second) : string_type()[.](#4.sentence-1)
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[ð](#lib:sub_match,compare)
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`int compare(const sub_match& s) const;
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`
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[5](#5)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10923)
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*Returns*: str().compare(s.str())[.](#5.sentence-1)
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[ð](#lib:sub_match,compare_)
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`int compare(const string_type& s) const;
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`
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[6](#6)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10934)
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*Returns*: str().compare(s)[.](#6.sentence-1)
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[ð](#lib:sub_match,compare__)
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`int compare(const value_type* s) const;
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`
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[7](#7)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10945)
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*Returns*: str().compare(s)[.](#7.sentence-1)
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[ð](#lib:sub_match,swap)
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`void swap(sub_match& s) noexcept(see below);
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`
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[8](#8)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10956)
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*Preconditions*: BidirectionalIterator meets
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the *Cpp17Swappable* requirements ([[swappable.requirements]](swappable.requirements "16.4.4.3 Swappable requirements"))[.](#8.sentence-1)
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[9](#9)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10961)
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*Effects*: Equivalent to:this->pair<BidirectionalIterator, BidirectionalIterator>::swap(s);
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std::swap(matched, s.matched);
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[10](#10)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10969)
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*Remarks*: The exception specification is equivalent tois_nothrow_swappable_v<BidirectionalIterator>[.](#10.sentence-1)
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