Difference between revisions of "cpp/language/attributes/noreturn"
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Revision as of 03:36, 24 June 2018
Template:cpp/attribute/title Template:cpp/attribute/navbar
Indicates that the function does not return.
Syntax
[[noreturn]] function-declaration
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specifiers function-name [[noreturn]] parameters-and-qualifiers
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Explanation
Indicates that the function does not return.
This attribute applies to function declarations only. The behavior is undefined if the function with this attribute actually returns.
The following standard functions have this attribute: std::_Exit, std::abort, std::exit, std::quick_exit, std::longjmp(since C++17), std::unexpected, std::terminate, std::rethrow_exception, std::throw_with_nested, std::nested_exception::rethrow_nested.
Example
Run this code
[[ noreturn ]] void f() { throw "error"; // OK } [[ noreturn ]] void q(int i) { // behavior is undefined if called with an argument <= 0 if (i > 0) { throw "positive"; } }
