function_identity.hpp

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#pragma once
 
#include <type_traits>
 
namespace uni20::detail
{
template <auto Function> struct function_identity;
 
// Select provider operations by template identity, without evaluating pointer
// equality. GCC with UBSan rejects constant-expression comparisons of distinct
// externally declared functions, including MPFR and MPC entry points.
template <auto Left, auto Right>
inline constexpr bool same_function_v = std::is_same_v<function_identity<Left>, function_identity<Right>>;
} // namespace uni20::detail