add_volatile

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

Adds the volatile qualifier to a specified type during program compilation. This API can be used for type conversion during compilation.

Prototype

template <typename Tp>
struct add_volatile;

Parameters

**Table 1** Template parameters
Parameter	Description
Tp	Types to be processed, including basic types (such as int and float), composite types (such as array, pointer, and reference), user-defined types (such as class and struct), and volatile-qualified types.

Restrictions

None

Returns

add_volatile is a struct that provides a nested type, which represents the type after the volatile qualifier is added. This type can be accessed through add_volatile<Tp>::type.

Examples

// Test non-volatile type
ascendc_assert((AscendC::Std::is_same_v<AscendC::Std::add_volatile<int>::type, volatile int>));
ascendc_assert((AscendC::Std::is_same_v<AscendC::Std::add_volatile<double>::type, volatile double>));
ascendc_assert((AscendC::Std::is_same_v<AscendC::Std::add_volatile<char>::type, volatile char>));
// Test volatile type
ascendc_assert((AscendC::Std::is_same_v<AscendC::Std::add_volatile<volatile int>::type, volatile int>));
ascendc_assert((AscendC::Std::is_same_v<AscendC::Std::add_volatile<volatile double>::type, volatile double>));
ascendc_assert((AscendC::Std::is_same_v<AscendC::Std::add_volatile<volatile char>::type, volatile char>));

ascendc_assert((AscendC::Std::is_same_v<AscendC::Std::add_volatile_t<int>, volatile int>));
ascendc_assert((AscendC::Std::is_same_v<AscendC::Std::add_volatile_t<double>, volatile double>));

ascendc_assert((AscendC::Std::is_same_v<AscendC::Std::add_volatile_t<volatile int>, volatile int>));
ascendc_assert((AscendC::Std::is_same_v<AscendC::Std::add_volatile_t<volatile double>, volatile double>));

Parent topic: Type Traits