| Defined in header |
int feholdexcept( std::fenv_t* envp )
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
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.
|envp||-|| pointer to the object of type
0 on success, non-zero otherwise.
| restores the floating-point environment and raises the previously raise exceptions
| saves or restores the current floating point environment
| default floating-point environment
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