std::exception:: what
From cppreference.com
C++
Utilities library
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Diagnostics library
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std::exception
Member functions | ||||
exception::what
|
virtual
const
char
*
what
(
)
const
throw
(
)
;
|
(until C++11) | |
virtual
const
char
*
what
(
)
const
noexcept
;
|
(since C++11)
(constexpr since C++26) |
|
Returns the explanatory string.
Parameters
(none)
Return value
Pointer to a null-terminated string with explanatory information. The pointer is guaranteed to be valid at least until the exception object from which it is obtained is destroyed, or until a non-const member function on the exception object is called.
The returned string is encoded with the ordinary literal encoding during constant evaluation. |
(since C++26) |
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR | Applied to | Behavior as published | Correct behavior |
---|---|---|---|
LWG 108 | C++98 | it was unspecified when the returned pointer becomes invalid | specified |
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