val.h File Reference

Value-preserving literal types for C++26. More...

#include <concepts>
#include <exception>
#include <limits>
#include <source_location>
#include <string_view>

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Classes
class	vir::bad_value_preserving_cast
	Exception thrown when conversion to arithmetic type would change value. More...
struct	vir::constinteger
	Untyped integer literal type. More...
struct	vir::constreal
	Untyped real literal type. More...

Namespaces
namespace	vir

Macros
#define	vir_lib_val_literal   202601L
	Feature macro for value-preserving literals.

Functions
consteval constinteger	vir::operator""_val (unsigned long long __x) noexcept
	User-defined literal for untyped constants.
consteval constinteger	vir::val (unsigned_integral auto __x) noexcept
	Create untyped constant from typed value / constant expression.
consteval constinteger	vir::val (signed_integral auto __x) noexcept
	Create untyped constant from typed value / constant expression.
consteval constreal	vir::operator""_val (long double __x) noexcept
	User-defined literal for untyped constants.
consteval constreal	vir::val (long double __x) noexcept
	Create untyped constant from typed value / constant expression.

Detailed Description

Value-preserving literal types for C++26.

This header provides user-defined literal to produce untyped values that ensure their value is preserved on conversion to arithmetic type, preventing precision loss and overflow.

Requires C++26.

Macro Definition Documentation

vir_lib_val_literal

#define vir_lib_val_literal   202601L

Feature macro for value-preserving literals.

This is modelled after C++ feature macros.