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Difference between revisions of "cpp/numeric/fenv/feupdateenv"

From cppreference.com
< cpp‎ | numeric‎ | fenv
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int feupdateenv( const std::fenv_t* envp )
 
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Latest revision as of 08:09, 18 September 2017

 
C++
 
Numerics library
Common mathematical functions
Mathematical special functions (C++17)
Mathematical constants (C++20)
Basic linear algebra algorithms (C++26)
Floating-point environment (C++11)
Complex numbers
Numeric array (valarray)
Pseudo-random number generation
Factor operations
(C++17)
(C++17)
Interpolations
(C++20)
(C++20)
Saturation arithmetic
(C++26)
(C++26)
(C++26)
(C++26)
(C++26)

Generic numeric operations
Bit operations
(C++20)    
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++23)
(C++20)
 
Floating-point environment
Functions
(C++11)
(C++11)
(C++11)
(C++11)(C++11)
(C++11)(C++11)
(C++11)(C++11)
(C++11)
feupdateenv
(C++11)
Macro constants
(C++11)(C++11)(C++11)(C++11)(C++11)(C++11)
(C++11)(C++11)(C++11)(C++11)
(C++11)
 
Defined in header <cfenv>
int feupdateenv( const std::fenv_t* envp )
 (since C++11)

First, remembers the currently raised floating-point exceptions, then restores the floating-point environment from the object pointed to by envp (similar to std::fesetenv), then raises the floating-point exceptions that were saved.

This function may be used to end the non-stop mode established by an earlier call to std::feholdexcept.

[edit] Parameters

envp - pointer to the object of type std::fenv_t set by an earlier call to std::feholdexcept or std::fegetenv or equal to FE_DFL_ENV

[edit] Return value

​0​ on success, non-zero otherwise.

[edit] See also

(C++11)
 saves the environment, clears all status flags and ignores all future errors
(function) [edit]
(C++11)
 saves or restores the current floating-point environment
(function) [edit]
(C++11)
 default floating-point environment
(macro constant) [edit]
C documentation for feupdateenv
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