std::meta::is_floating_point_type

 

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Defined in header <meta>
consteval bool is_floating_point_type( std::meta::info r );		(since C++26)

Returns true if r represents a floating-point type, that is, any of float, double, long double, or any extended floating-point types (std::float16_t, std::float32_t, std::float64_t, std::float128_t, or std::bfloat16_t) and cv-qualified variants. Otherwise returns false.

Parameters

r

-

a reflection value

Return value

true if r represents a floating-point type; otherwise false.

Exceptions

Throws std::meta::exception if r does not represent a type or type alias.

Example

Run this code

#include <meta>
#include <stdfloat>

class A {};
static_assert(!is_floating_point_type(^^A));

static_assert( is_floating_point_type(^^float));
static_assert(!is_floating_point_type(^^float&));
static_assert( is_floating_point_type(add_cv(^^double)));
static_assert(!is_floating_point_type(^^double&));
static_assert(!is_floating_point_type(^^long));

#if __STDCPP_FLOAT64_T__ == 1
static_assert(is_floating_point_type(^^std::float64_t));
#endif

int main() {}

See also

is_arithmetic_type (C++26)	checks if reflection represents an arithmetic type (function)
is_fundamental_type (C++26)	checks if reflection represents a fundamental type (function)
is_scalar_type (C++26)	checks if reflected type is a scalar type (function)
is_floating_point (C++11)	checks if a type is a floating-point type (class template)
is_arithmetic (C++11)	checks if a type is an arithmetic type (class template)
floating_point (C++20)	specifies that a type is a floating-point type (concept)
is_iec559 [static]	identifies the IEC 559/IEEE 754 floating-point types (public static member constant of std::numeric_limits<T>)