[futures.future.error]

# 32 Concurrency support library [[thread]](./#thread)

## 32.10 Futures [[futures]](futures#future.error)

### 32.10.4 Class future_error [futures.future.error]

[🔗](#lib:future_error)

namespace std {class future_error : public logic_error {public:explicit future_error(future_errc e); const error_code& code() const noexcept; const char* what() const noexcept; private: error_code ec_; // *exposition only*};}

[🔗](#lib:future_error,constructor)

`explicit future_error(future_errc e);
`

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/threads.tex#L11282)

*Effects*: Initializes ec_ with make_error_code(e)[.](#1.sentence-1)

[🔗](#lib:code,future_error)

`const error_code& code() const noexcept;
`

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/threads.tex#L11293)

*Returns*: ec_[.](#2.sentence-1)

[🔗](#lib:what,future_error)

`const char* what() const noexcept;
`

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/threads.tex#L11304)

*Returns*: An ntbs incorporating code().message()[.](#3.sentence-1)