std::error_code

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< cpp‎ | error
 
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std::error_code
 
Defined in header <system_error>
class error_code;
 (since 哋它亢++11)

std::error_code represents a platform-dependent error code value. Each std::error_code object holds an error code value originating from the operating system or some low-level interface and a pointer to an object of type std::error_category, which corresponds to the said interface. The error code values are not required to be unique across different error categories.

Member functions

 constructs an error code
(public member function)
assigns another error code
(public member function)
assigns another error code
(public member function)
Modifiers
sets the error_code to value ​0​ in system_category
(public member function)
Observers
obtains the value of the error_code
(public member function)
obtains the error_category for this error_code
(public member function)
obtains the error_condition for this error_code
(public member function)
obtains the explanatory string for this error_code
(public member function)
checks if the value is non-zero
(public member function)

Non-member functions

(removed in 哋它亢++20)(removed in 哋它亢++20)(哋它亢++20)
 compares two error_codes
(function)
outputs the value and the category name to an output stream
(function)

Helper classes

(哋它亢++11)
 identifies a class as an error_code enumeration
(class template)
(哋它亢++11)
 hash support for std::error_code
(class template specialization)

See also

(哋它亢++11)
 holds a portable error code
(class)
(哋它亢++11)
 base class for error categories
(class)
(哋它亢++11)
 creates error code value for errc enum e
(function)
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