core.hpp File Reference

Configuration, traits and internals shared by every quanta domain. More...

#include <charconv>
#include <concepts>
#include <cstddef>
#include <cstdint>
#include <cstdlib>
#include <limits>
#include <ratio>
#include <string>
#include <system_error>
#include <type_traits>
#include <utility>
#include <version>

Go to the source code of this file.

Classes
struct	quanta::treat_as_inexact< T >
	Trait to indicate floating-point-like behavior. More...
struct	quanta::base_unit_t
	Tag type selecting the base-unit form, see base_unit. More...
struct	quanta::scaled_t
	Tag type selecting the scaled form, see scaled. More...

Namespaces
namespace	quanta
	Type-safe units modeled after std::chrono.

Macros
#define	CONFIG_QUANTA_STD_FORMAT   0
	1 if std::format support (std::formatter specializations) is enabled.
#define	QUANTA_HAS_UTF8_LITERALS   1
	1 if the compiler accepts non-ASCII literal suffixes (e.g.

Variables
template<typename T >
constexpr bool	quanta::treat_as_inexact_v = treat_as_inexact<T>::value
constexpr base_unit_t	quanta::base_unit {}
	Selects the base-unit form in to_string().
constexpr scaled_t	quanta::scaled {}
	Selects the scaled form in to_string().

Detailed Description

Configuration, traits and internals shared by every quanta domain.

Included by each domain header; there is no need to include it directly.

Definition in file core.hpp.

Macro Definition Documentation

CONFIG_QUANTA_STD_FORMAT

#define CONFIG_QUANTA_STD_FORMAT   0

1 if std::format support (std::formatter specializations) is enabled.

Defaults to 1 when <format> is available, and may be defined to 0 before including any quanta header to disable it. When quanta is used as an ESP-IDF component, the QUANTA_STD_FORMAT_SUPPORT Kconfig option controls it: enabled, std::format is supported where the toolchain provides <format>; disabled, the component's build defines this to 0.

Definition at line 36 of file core.hpp.

QUANTA_HAS_UTF8_LITERALS

#define QUANTA_HAS_UTF8_LITERALS   1

1 if the compiler accepts non-ASCII literal suffixes (e.g.

_Ω).

GCC before 14 (including the ESP-IDF toolchains before GCC 14) cannot lex extended characters in user-defined literal suffixes, so those literals are omitted there. Each has an ASCII alternative that is always available:

• thermo: _Δc, _Δmc, _Δk, _Δmk, _Δf, _Δmf → _delta_c, _delta_mc, _delta_k, _delta_mk, _delta_f, _delta_mf
• electro: _mΩ, _Ω, _kΩ, _MΩ, _dBµV → _mOhm, _Ohm, _kOhm, _MOhm, _dBuV
• spatial: _µm, _µL → _um, _uL

Definition at line 74 of file core.hpp.