std::exception::exception
From cppreference.com
C++
Utilities library
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Diagnostics library
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std::exception
| Member functions | ||||
exception::exception | ||||
| (1) | ||
exception() throw(); |
(until C++11) | |
exception() noexcept; |
(since C++11) (constexpr since C++26) |
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| (2) | ||
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exception(
const exception& other )
throw
(
)
;
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(until C++11) | |
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exception( const exception& other ) noexcept;
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(since C++11) (constexpr since C++26) |
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Constructs new exception object.
1) Default constructor. what() returns an implementation-defined string.
2) Copy constructor. Initializes the contents with those of other. If *this and other both have dynamic type
std::exception then
std::strcmp
(what(
), other.what
(
)
)
==
0
Parameters
| other | - | another exception to assign the contents of |
Notes
Because copying std::exception is not permitted to throw exceptions, when derived classes (such as std::runtime_error
The Microsoft implementation includes non-standard constructors taking strings thus allowing instances to be thrown directly with a meaningful error message. The nearest standard equivalents are std::runtime_error or std::logic_error
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 471 | C++98 | there is no requirement on what() of the exception copy | added |