54 lines
1.3 KiB
Markdown
54 lines
1.3 KiB
Markdown
[syserr.errcondition.observers]
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# 19 Diagnostics library [[diagnostics]](./#diagnostics)
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## 19.5 System error support [[syserr]](syserr#errcondition.observers)
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### 19.5.5 Class error_condition [[syserr.errcondition]](syserr.errcondition#observers)
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#### 19.5.5.4 Observers [syserr.errcondition.observers]
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[ð](#lib:value,error_condition)
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`int value() const noexcept;
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`
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L1379)
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*Returns*: *val_*[.](#1.sentence-1)
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[ð](#lib:category,error_condition)
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`const error_category& category() const noexcept;
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`
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L1390)
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*Returns*: **cat_*[.](#2.sentence-1)
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[ð](#lib:message,error_condition)
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`string message() const;
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`
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[3](#3)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L1401)
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*Returns*: category().message(value())[.](#3.sentence-1)
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[ð](#lib:operator_bool,error_condition)
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`explicit operator bool() const noexcept;
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`
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[4](#4)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L1412)
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*Returns*: value() != 0[.](#4.sentence-1)
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