54 lines
1.7 KiB
Markdown
54 lines
1.7 KiB
Markdown
[syserr.errcat.derived]
|
|
|
|
# 19 Diagnostics library [[diagnostics]](./#diagnostics)
|
|
|
|
## 19.5 System error support [[syserr]](syserr#errcat.derived)
|
|
|
|
### 19.5.3 Class error_category [[syserr.errcat]](syserr.errcat#derived)
|
|
|
|
#### 19.5.3.4 Program-defined classes derived from error_category [syserr.errcat.derived]
|
|
|
|
[ð](#lib:name,error_category)
|
|
|
|
`virtual const char* name() const noexcept = 0;
|
|
`
|
|
|
|
[1](#1)
|
|
|
|
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L917)
|
|
|
|
*Returns*: A string naming the error category[.](#1.sentence-1)
|
|
|
|
[ð](#lib:default_error_condition,error_category)
|
|
|
|
`virtual error_condition default_error_condition(int ev) const noexcept;
|
|
`
|
|
|
|
[2](#2)
|
|
|
|
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L928)
|
|
|
|
*Returns*: An object of type error_condition that corresponds to ev[.](#2.sentence-1)
|
|
|
|
[ð](#lib:equivalent,error_category)
|
|
|
|
`virtual bool equivalent(int code, const error_condition& condition) const noexcept;
|
|
`
|
|
|
|
[3](#3)
|
|
|
|
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L939)
|
|
|
|
*Returns*: true if, for the category of error represented by *this, code is considered equivalent to condition; otherwise, false[.](#3.sentence-1)
|
|
|
|
[ð](#lib:equivalent,error_category_)
|
|
|
|
`virtual bool equivalent(const error_code& code, int condition) const noexcept;
|
|
`
|
|
|
|
[4](#4)
|
|
|
|
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L950)
|
|
|
|
*Returns*: true if, for the category of error represented by *this, code is considered equivalent to condition; otherwise, false[.](#4.sentence-1)
|