is_constant_evaluated.hpp File Reference

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Functions
constexpr bool	bsl::is_constant_evaluated () noexcept
	Detects whether the function call occurs within a constant-evaluated context. Returns true if the evaluation of the call occurs within the evaluation of an expression or conversion that is manifestly constant-evaluated; otherwise returns false. More...

Detailed Description

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Function Documentation

is_constant_evaluated()

constexpr bool bsl::is_constant_evaluated ( )

noexcept

Detects whether the function call occurs within a constant-evaluated context. Returns true if the evaluation of the call occurs within the evaluation of an expression or conversion that is manifestly constant-evaluated; otherwise returns false.

#include <bsl/is_constant_evaluated.hpp>
#include <bsl/debug.hpp>

namespace bsl
{
    inline void
    example_is_constant_evaluated_overview() noexcept
    {
        if constexpr (bsl::is_constant_evaluated()) {
            bsl::print() << "success\n";
        }

        if (!bsl::is_constant_evaluated()) {
            bsl::print() << "success\n";
        }
    }
}

Returns

Returns true if the evaluation of the call occurs within the evaluation of an expression or conversion that is manifestly constant-evaluated; otherwise returns false.