std::feholdexcept
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feholdexcept
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Defined in header
<cfenv>
int feholdexcept( std::fenv_t * envp )
(since C++11)
First, saves the current floating-point environment to the object pointed to by envp (similar to std::fegetenv ), then clears all floating-point status flags, and then installs the non-stop mode: future floating-point exceptions will not interrupt execution (will not trap), until the floating-point environment is restored by std::feupdateenv or std::fesetenv .
This function may be used in the beginning of a subroutine that must hide the floating-point exceptions it may raise from the caller. If only some exceptions must be suppressed, while others must be reported, the non-stop mode is usually ended with a call to std::feupdateenv after clearing the unwanted exceptions.
[edit] Parameters
envp
-
pointer to the object of type std::fenv_t where the floating-point environment will be stored
[edit] Return value
0 on success, non-zero otherwise.
[edit] See also
(C++11)
(function) [edit]
C documentation for feholdexcept