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std::isgreaterequal

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< cpp‎ | numeric‎ | math
 
 
 
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Defined in header <cmath>
(1)
bool isgreaterequal( float x, float y );

bool isgreaterequal( double x, double y );

bool isgreaterequal( long double x, long double y );
(since C++11)
(until C++23)
constexpr bool isgreaterequal( /* floating-point-type */ x,
                               /* floating-point-type */ y );
(since C++23)
Defined in header <cmath>
template< class Arithmetic1, class Arithmetic2 >
bool isgreaterequal( Arithmetic1 x, Arithmetic2 y );
(A) (since C++11)
(constexpr since C++23)
1) Determines if the floating point number x is greater than or equal to the floating-point number y, without setting floating-point exceptions. The library provides overloads for all cv-unqualified floating-point types as the type of the parameters x and y.(since C++23)
A) Additional overloads are provided for all other combinations of arithmetic types.

Contents

[edit] Parameters

x, y - floating-point or integer values

[edit] Return value

true if x >= y, false otherwise.

[edit] Notes

The built-in operator>= for floating-point numbers may raise FE_INVALID if one or both of the arguments is NaN. This function is a "quiet" version of operator>=.

The additional overloads are not required to be provided exactly as (A). They only need to be sufficient to ensure that for their first argument num1 and second argument num2:

  • If num1 or num2 has type long double, then std::isgreaterequal(num1, num2) has the same effect as std::isgreaterequal(static_cast<long double>(num1),
                        static_cast<long double>(num2))
    .
  • Otherwise, if num1 and/or num2 has type double or an integer type, then std::isgreaterequal(num1, num2) has the same effect as std::isgreaterequal(static_cast<double>(num1),
                        static_cast<double>(num2))
    .
  • Otherwise, if num1 or num2 has type float, then std::isgreaterequal(num1, num2) has the same effect as std::isgreaterequal(static_cast<float>(num1),
                        static_cast<float>(num2))
    .
(until C++23)

If num1 and num2 have arithmetic types, then std::isgreaterequal(num1, num2) has the same effect as std::isgreaterequal(static_cast</* common-floating-point-type */>(num1),
                    static_cast</* common-floating-point-type */>(num2))
, where /* common-floating-point-type */ is the floating-point type with the greatest floating-point conversion rank and greatest floating-point conversion subrank between the types of num1 and num2, arguments of integer type are considered to have the same floating-point conversion rank as double.

If no such floating-point type with the greatest rank and subrank exists, then overload resolution does not result in a usable candidate from the overloads provided.

(since C++23)

[edit] See also

function object implementing x >= y
(class template) [edit]
checks if the first floating-point argument is less or equal than the second
(function) [edit]
C documentation for isgreaterequal