From cppreference.com
intfeholdexcept(std::fenv_t*envp)(since C++11)First, saves the current floating-point environment to the object pointed to by envp (similar to
), 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
or
.
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
after clearing the unwanted exceptions.
Parameters
envp - pointer to the object of type std::fenv_t where the floating-point environment will be stored Return value
0 on success, non-zero otherwise.
See also