37 lines
1.7 KiB
Markdown
37 lines
1.7 KiB
Markdown
[iostreams.limits.pos]
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# 31 Input/output library [[input.output]](./#input.output)
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## 31.2 Iostreams requirements [[iostreams.requirements]](iostreams.requirements#iostreams.limits.pos)
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### 31.2.3 Positioning type limitations [iostreams.limits.pos]
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L97)
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The classes of [[input.output]](input.output "31 Input/output library") with template argumentscharT andtraits behave as described iftraits::pos_type andtraits::off_type arestreampos andstreamoff respectively[.](#1.sentence-1)
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Except as noted explicitly below, their behavior whentraits::pos_type andtraits::off_type are other types isimplementation-defined[.](#1.sentence-2)
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L119)
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[*Note [1](#note-1)*:
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For each of the specializations of char_traits defined in[[char.traits.specializations]](char.traits.specializations "27.2.4 char_traits specializations"),state_type denotes mbstate_t,pos_type denotes fpos<mbstate_t>,
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and off_type denotes streamoff[.](#2.sentence-1)
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â *end note*]
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[3](#3)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L128)
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In the classes of [[input.output]](input.output "31 Input/output library"), a template parameter with namecharT represents a member of the set of types containing char, wchar_t,
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and any other implementation-defined
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character container types ([[defns.character.container]](defns.character.container "3.10 character container type"))
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that meet the requirements for a character on which any of
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the iostream components can be instantiated[.](#3.sentence-1)
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