is_floating_point

Applicability

Product	Supported
Atlas 350 Accelerator Card	√
Atlas A3 training product/Atlas A3 inference product	√
Atlas A2 training product/Atlas A2 inference product	√
Atlas 200I/500 A2 inference product	x
Atlas inference product AI Core	x
Atlas inference product Vector Core	x
Atlas training product	x

Function Usage

Checks whether a type is the floating-point type during program compilation. This API can be used for type checking and conditional processing during compilation.

Prototype

template <typename T>
struct is_floating_point;

Parameters

**Table 1** Template parameters
Parameter	Description
T	Types to be checked, including basic data types and modifier types

Restrictions

None

Returns

The static constant member value of is_floating_point is used to obtain the returned Boolean value. The values of is_floating_point<Tp>::value are as follows:

true: Tp is of the floating-point type.
false: Tp is not of the floating-point type.

Examples

// Custom test type
struct MyStruct{};

// Function type whose return value is of the floating-point type
using FuncType = double(int);

// Legal floating point type
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<float>::value);
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<double>::value);
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<long double>::value);

// Floating point types limited by CV
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<const float>::value);
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<volatile double>::value);

// non-floating point type
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<int>::value);
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<bool>::value);
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<double*>::value);
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<float&>::value);
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<double[5]>::value);
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<FuncType>::value);
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<MyStruct>::value);
AscendC::printf("AscendC::Std::is_floating_point::value:%d\n", AscendC::Std::is_floating_point<void>::value);

// Execution result
AscendC::Std::is_floating_point::value:1
AscendC::Std::is_floating_point::value:1
AscendC::Std::is_floating_point::value:1
AscendC::Std::is_floating_point::value:1
AscendC::Std::is_floating_point::value:1
AscendC::Std::is_floating_point::value:0
AscendC::Std::is_floating_point::value:0
AscendC::Std::is_floating_point::value:0
AscendC::Std::is_floating_point::value:0
AscendC::Std::is_floating_point::value:0
AscendC::Std::is_floating_point::value:0
AscendC::Std::is_floating_point::value:0
AscendC::Std::is_floating_point::value:0

Parent topic: Type Traits