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// Formatting library for C++ - the base API for char/UTF-8
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#ifndef FMT_BASE_H_
#define FMT_BASE_H_
#if defined(FMT_IMPORT_STD) && !defined(FMT_MODULE)
# define FMT_MODULE
#endif
#ifndef FMT_MODULE
# include <limits.h> // CHAR_BIT
# include <stdio.h> // FILE
# include <string.h> // memcmp
# include <type_traits> // std::enable_if
#endif
// The fmt library version in the form major * 10000 + minor * 100 + patch.
#define FMT_VERSION 120101
// Detect compiler versions.
#if defined(__clang__) && !defined(__ibmxl__)
# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
#else
# define FMT_CLANG_VERSION 0
#endif
#if defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER)
# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
#else
# define FMT_GCC_VERSION 0
#endif
#if defined(__ICL)
# define FMT_ICC_VERSION __ICL
#elif defined(__INTEL_COMPILER)
# define FMT_ICC_VERSION __INTEL_COMPILER
#else
# define FMT_ICC_VERSION 0
#endif
#if defined(_MSC_VER)
# define FMT_MSC_VERSION _MSC_VER
#else
# define FMT_MSC_VERSION 0
#endif
// Detect standard library versions.
#ifdef _GLIBCXX_RELEASE
# define FMT_GLIBCXX_RELEASE _GLIBCXX_RELEASE
#else
# define FMT_GLIBCXX_RELEASE 0
#endif
#ifdef _LIBCPP_VERSION
# define FMT_LIBCPP_VERSION _LIBCPP_VERSION
#else
# define FMT_LIBCPP_VERSION 0
#endif
#ifdef _MSVC_LANG
# define FMT_CPLUSPLUS _MSVC_LANG
#else
# define FMT_CPLUSPLUS __cplusplus
#endif
// Detect __has_*.
#ifdef __has_feature
# define FMT_HAS_FEATURE(x) __has_feature(x)
#else
# define FMT_HAS_FEATURE(x) 0
#endif
#ifdef __has_include
# define FMT_HAS_INCLUDE(x) __has_include(x)
#else
# define FMT_HAS_INCLUDE(x) 0
#endif
#ifdef __has_builtin
# define FMT_HAS_BUILTIN(x) __has_builtin(x)
#else
# define FMT_HAS_BUILTIN(x) 0
#endif
#ifdef __has_cpp_attribute
# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
#else
# define FMT_HAS_CPP_ATTRIBUTE(x) 0
#endif
#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \
(FMT_CPLUSPLUS >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute))
#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \
(FMT_CPLUSPLUS >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute))
// Detect C++14 relaxed constexpr.
#ifdef FMT_USE_CONSTEXPR
// Use the provided definition.
#elif FMT_GCC_VERSION >= 702 && FMT_CPLUSPLUS >= 201402L
// GCC only allows constexpr member functions in non-literal types since 7.2:
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66297.
# define FMT_USE_CONSTEXPR 1
#elif FMT_ICC_VERSION
# define FMT_USE_CONSTEXPR 0 // https://github.com/fmtlib/fmt/issues/1628
#elif FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VERSION >= 1912
# define FMT_USE_CONSTEXPR 1
#else
# define FMT_USE_CONSTEXPR 0
#endif
#if FMT_USE_CONSTEXPR
# define FMT_CONSTEXPR constexpr
#else
# define FMT_CONSTEXPR
#endif
// Detect consteval, C++20 constexpr extensions and std::is_constant_evaluated.
#ifdef FMT_USE_CONSTEVAL
// Use the provided definition.
#elif !defined(__cpp_lib_is_constant_evaluated)
# define FMT_USE_CONSTEVAL 0
#elif FMT_CPLUSPLUS < 201709L
# define FMT_USE_CONSTEVAL 0
#elif FMT_GLIBCXX_RELEASE && FMT_GLIBCXX_RELEASE < 10
# define FMT_USE_CONSTEVAL 0
#elif FMT_LIBCPP_VERSION && FMT_LIBCPP_VERSION < 10000
# define FMT_USE_CONSTEVAL 0
#elif defined(__apple_build_version__) && __apple_build_version__ < 14000029L
# define FMT_USE_CONSTEVAL 0 // consteval is broken in Apple clang < 14.
#elif FMT_MSC_VERSION && FMT_MSC_VERSION < 1940
# define FMT_USE_CONSTEVAL 0 // consteval is broken in some MSVC2022 versions.
#elif defined(__cpp_consteval)
# define FMT_USE_CONSTEVAL 1
#elif FMT_GCC_VERSION >= 1002 || FMT_CLANG_VERSION >= 1101
# define FMT_USE_CONSTEVAL 1
#else
# define FMT_USE_CONSTEVAL 0
#endif
#if FMT_USE_CONSTEVAL
# define FMT_CONSTEVAL consteval
# define FMT_CONSTEXPR20 constexpr
#else
# define FMT_CONSTEVAL
# define FMT_CONSTEXPR20
#endif
// Check if exceptions are disabled.
#ifdef FMT_USE_EXCEPTIONS
// Use the provided definition.
#elif defined(__GNUC__) && !defined(__EXCEPTIONS)
# define FMT_USE_EXCEPTIONS 0
#elif defined(__clang__) && !defined(__cpp_exceptions)
# define FMT_USE_EXCEPTIONS 0
#elif FMT_MSC_VERSION && !_HAS_EXCEPTIONS
# define FMT_USE_EXCEPTIONS 0
#else
# define FMT_USE_EXCEPTIONS 1
#endif
#if FMT_USE_EXCEPTIONS
# define FMT_TRY try
# define FMT_CATCH(x) catch (x)
#else
# define FMT_TRY if (true)
# define FMT_CATCH(x) if (false)
#endif
#ifdef FMT_NO_UNIQUE_ADDRESS
// Use the provided definition.
#elif FMT_CPLUSPLUS < 202002L
// Not supported.
#elif FMT_HAS_CPP_ATTRIBUTE(no_unique_address)
# define FMT_NO_UNIQUE_ADDRESS [[no_unique_address]]
// VS2019 v16.10 and later except clang-cl (https://reviews.llvm.org/D110485).
#elif FMT_MSC_VERSION >= 1929 && !FMT_CLANG_VERSION
# define FMT_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
#endif
#ifndef FMT_NO_UNIQUE_ADDRESS
# define FMT_NO_UNIQUE_ADDRESS
#endif
#if FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
# define FMT_FALLTHROUGH [[fallthrough]]
#elif defined(__clang__)
# define FMT_FALLTHROUGH [[clang::fallthrough]]
#elif FMT_GCC_VERSION >= 700 && \
(!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
# define FMT_FALLTHROUGH [[gnu::fallthrough]]
#else
# define FMT_FALLTHROUGH
#endif
// Disable [[noreturn]] on MSVC/NVCC because of bogus unreachable code warnings.
#if FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VERSION && !defined(__NVCC__)
# define FMT_NORETURN [[noreturn]]
#else
# define FMT_NORETURN
#endif
#ifdef FMT_NODISCARD
// Use the provided definition.
#elif FMT_HAS_CPP17_ATTRIBUTE(nodiscard)
# define FMT_NODISCARD [[nodiscard]]
#else
# define FMT_NODISCARD
#endif
#if FMT_GCC_VERSION || FMT_CLANG_VERSION
# define FMT_VISIBILITY(value) __attribute__((visibility(value)))
#else
# define FMT_VISIBILITY(value)
#endif
// Detect pragmas.
#define FMT_PRAGMA_IMPL(x) _Pragma(#x)
#if FMT_GCC_VERSION >= 504 && !defined(__NVCOMPILER)
// Workaround a _Pragma bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59884
// and an nvhpc warning: https://github.com/fmtlib/fmt/pull/2582.
# define FMT_PRAGMA_GCC(x) FMT_PRAGMA_IMPL(GCC x)
#else
# define FMT_PRAGMA_GCC(x)
#endif
#if FMT_CLANG_VERSION
# define FMT_PRAGMA_CLANG(x) FMT_PRAGMA_IMPL(clang x)
#else
# define FMT_PRAGMA_CLANG(x)
#endif
#ifndef FMT_USE_OPTIMIZE_PRAGMA
# define FMT_USE_OPTIMIZE_PRAGMA 1
#endif
// Enable minimal optimizations for more compact code in debug mode.
FMT_PRAGMA_GCC(push_options)
#if FMT_USE_OPTIMIZE_PRAGMA && !defined(__OPTIMIZE__) && \
!defined(__CUDACC__) && !defined(FMT_MODULE)
FMT_PRAGMA_GCC(optimize("Og"))
#endif
#ifdef FMT_DEPRECATED
// Use the provided definition.
#elif FMT_HAS_CPP14_ATTRIBUTE(deprecated)
# define FMT_DEPRECATED [[deprecated]]
#else
# define FMT_DEPRECATED /* deprecated */
#endif
#ifdef FMT_ALWAYS_INLINE
// Use the provided definition.
#elif FMT_GCC_VERSION || FMT_CLANG_VERSION
# define FMT_ALWAYS_INLINE inline __attribute__((always_inline))
#else
# define FMT_ALWAYS_INLINE inline
#endif
// A version of FMT_ALWAYS_INLINE to prevent code bloat in debug mode.
#ifdef NDEBUG
# define FMT_INLINE FMT_ALWAYS_INLINE
#else
# define FMT_INLINE inline
#endif
#ifndef FMT_BEGIN_NAMESPACE
# define FMT_BEGIN_NAMESPACE \
namespace fmt { \
inline namespace v12 {
# define FMT_END_NAMESPACE \
} \
}
#endif
#ifndef FMT_EXPORT
# define FMT_EXPORT
# define FMT_BEGIN_EXPORT
# define FMT_END_EXPORT
#endif
#ifdef _WIN32
# define FMT_WIN32 1
#else
# define FMT_WIN32 0
#endif
#if !defined(FMT_HEADER_ONLY) && FMT_WIN32
# if defined(FMT_LIB_EXPORT)
# define FMT_API __declspec(dllexport)
# elif defined(FMT_SHARED)
# define FMT_API __declspec(dllimport)
# endif
#elif defined(FMT_LIB_EXPORT) || defined(FMT_SHARED)
# define FMT_API FMT_VISIBILITY("default")
#endif
#ifndef FMT_API
# define FMT_API
#endif
#ifndef FMT_OPTIMIZE_SIZE
# define FMT_OPTIMIZE_SIZE 0
#endif
// FMT_BUILTIN_TYPE=0 may result in smaller library size at the cost of higher
// per-call binary size by passing built-in types through the extension API.
#ifndef FMT_BUILTIN_TYPES
# define FMT_BUILTIN_TYPES 1
#endif
#define FMT_APPLY_VARIADIC(expr) \
using unused = int[]; \
(void)unused { 0, (expr, 0)... }
FMT_BEGIN_NAMESPACE
// Implementations of enable_if_t and other metafunctions for older systems.
template <bool B, typename T = void>
using enable_if_t = typename std::enable_if<B, T>::type;
template <bool B, typename T, typename F>
using conditional_t = typename std::conditional<B, T, F>::type;
template <bool B> using bool_constant = std::integral_constant<bool, B>;
template <typename T>
using remove_reference_t = typename std::remove_reference<T>::type;
template <typename T>
using remove_const_t = typename std::remove_const<T>::type;
template <typename T>
using remove_cvref_t = typename std::remove_cv<remove_reference_t<T>>::type;
template <typename T>
using make_unsigned_t = typename std::make_unsigned<T>::type;
template <typename T>
using underlying_t = typename std::underlying_type<T>::type;
template <typename T> using decay_t = typename std::decay<T>::type;
using nullptr_t = decltype(nullptr);
using ullong = unsigned long long;
#if (FMT_GCC_VERSION && FMT_GCC_VERSION < 500) || FMT_MSC_VERSION
// A workaround for gcc 4.9 & MSVC v141 to make void_t work in a SFINAE context.
template <typename...> struct void_t_impl {
using type = void;
};
template <typename... T> using void_t = typename void_t_impl<T...>::type;
#else
template <typename...> using void_t = void;
#endif
struct monostate {
constexpr monostate() {}
};
// An enable_if helper to be used in template parameters which results in much
// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed
// to workaround a bug in MSVC 2019 (see #1140 and #1186).
#ifdef FMT_DOC
# define FMT_ENABLE_IF(...)
#else
# define FMT_ENABLE_IF(...) fmt::enable_if_t<(__VA_ARGS__), int> = 0
#endif
template <typename T> constexpr auto min_of(T a, T b) -> T {
return a < b ? a : b;
}
template <typename T> constexpr auto max_of(T a, T b) -> T {
return a > b ? a : b;
}
FMT_NORETURN FMT_API void assert_fail(const char* file, int line,
const char* message);
namespace detail {
// Suppresses "unused variable" warnings with the method described in
// https://herbsutter.com/2009/10/18/mailbag-shutting-up-compiler-warnings/.
// (void)var does not work on many Intel compilers.
template <typename... T> FMT_CONSTEXPR void ignore_unused(const T&...) {}
constexpr auto is_constant_evaluated(bool default_value = false) noexcept
-> bool {
// Workaround for incompatibility between clang 14 and libstdc++ consteval-based
// std::is_constant_evaluated: https://github.com/fmtlib/fmt/issues/3247.
#if FMT_CPLUSPLUS >= 202002L && FMT_GLIBCXX_RELEASE >= 12 && \
(FMT_CLANG_VERSION >= 1400 && FMT_CLANG_VERSION < 1500)
ignore_unused(default_value);
return __builtin_is_constant_evaluated();
#elif defined(__cpp_lib_is_constant_evaluated)
ignore_unused(default_value);
return std::is_constant_evaluated();
#else
return default_value;
#endif
}
#ifdef FMT_ASSERT
// Use the provided definition.
#elif defined(NDEBUG)
// FMT_ASSERT is not empty to avoid -Wempty-body.
# define FMT_ASSERT(condition, message) \
fmt::detail::ignore_unused((condition), (message))
#else
# define FMT_ASSERT(condition, message) \
((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \
? (void)0 \
: ::fmt::assert_fail(__FILE__, __LINE__, (message)))
#endif
#ifdef FMT_USE_INT128
// Use the provided definition.
#elif defined(__SIZEOF_INT128__) && !defined(__NVCC__) && \
!(FMT_CLANG_VERSION && FMT_MSC_VERSION)
# define FMT_USE_INT128 1
using native_int128 = __int128_t;
using native_uint128 = __uint128_t;
inline auto map(native_int128 x) -> native_int128 { return x; }
inline auto map(native_uint128 x) -> native_uint128 { return x; }
#else
# define FMT_USE_INT128 0
#endif
#if !FMT_USE_INT128
// Fallbacks to reduce conditional compilation and SFINAE.
enum class native_int128 {};
enum class native_uint128 {};
inline auto map(native_int128) -> monostate { return {}; }
inline auto map(native_uint128) -> monostate { return {}; }
#endif
// Casts a nonnegative integer to unsigned.
template <typename Int>
FMT_CONSTEXPR auto to_unsigned(Int value) -> make_unsigned_t<Int> {
FMT_ASSERT(std::is_unsigned<Int>::value || value >= 0, "negative value");
return static_cast<make_unsigned_t<Int>>(value);
}
template <typename Char>
using unsigned_char = conditional_t<sizeof(Char) == 1, unsigned char, unsigned>;
// A heuristic to detect std::string and std::[experimental::]string_view.
// It is mainly used to avoid dependency on <[experimental/]string_view>.
template <typename T, typename Enable = void>
struct is_std_string_like : std::false_type {};
template <typename T>
struct is_std_string_like<T, void_t<decltype(std::declval<T>().find_first_of(
typename T::value_type(), 0))>>
: std::is_convertible<decltype(std::declval<T>().data()),
const typename T::value_type*> {};
// Check if the literal encoding is UTF-8.
enum { is_utf8_enabled = "\u00A7"[1] == '\xA7' };
enum { use_utf8 = !FMT_WIN32 || is_utf8_enabled };
#ifndef FMT_UNICODE
# define FMT_UNICODE 1
#endif
static_assert(!FMT_UNICODE || use_utf8,
"Unicode support requires compiling with /utf-8");
template <typename T> constexpr auto narrow(T*) -> char* { return nullptr; }
constexpr FMT_ALWAYS_INLINE auto narrow(const char* s) -> const char* {
return s;
}
template <typename Char>
FMT_CONSTEXPR auto compare(const Char* s1, const Char* s2, size_t n) -> int {
if (!is_constant_evaluated() && sizeof(Char) == 1) return memcmp(s1, s2, n);
for (; n != 0; ++s1, ++s2, --n) {
if (*s1 < *s2) return -1;
if (*s1 > *s2) return 1;
}
return 0;
}
namespace adl {
using namespace std;
template <typename Container>
auto invoke_back_inserter()
-> decltype(back_inserter(std::declval<Container&>()));
} // namespace adl
template <typename It, typename Enable = std::true_type>
struct is_back_insert_iterator : std::false_type {};
template <typename It>
struct is_back_insert_iterator<
It, bool_constant<std::is_same<
decltype(adl::invoke_back_inserter<typename It::container_type>()),
It>::value>> : std::true_type {};
// Extracts a reference to the container from *insert_iterator.
template <typename OutputIt>
inline FMT_CONSTEXPR auto get_container(OutputIt it) ->
typename OutputIt::container_type& {
struct accessor : OutputIt {
constexpr accessor(OutputIt base) : OutputIt(base) {}
using OutputIt::container;
};
return *accessor(it).container;
}
} // namespace detail
// Parsing-related public API and forward declarations.
FMT_BEGIN_EXPORT
/**
* An implementation of `std::basic_string_view` for pre-C++17 providing a
* subset of the API. `fmt::basic_string_view` is used in the public API even
* if `std::basic_string_view` is available to prevent issues when a library is
* compiled with a different `-std` option than the client code (which is not
* recommended).
*/
template <typename Char> class basic_string_view {
private:
const Char* data_;
size_t size_;
public:
using value_type = Char;
using iterator = const Char*;
constexpr basic_string_view() noexcept : data_(nullptr), size_(0) {}
constexpr basic_string_view(const Char* s, size_t count) noexcept
: data_(s), size_(count) {}
#if FMT_GCC_VERSION
FMT_ALWAYS_INLINE
#endif
FMT_CONSTEXPR basic_string_view(const Char* s) : data_(s) {
#if FMT_HAS_BUILTIN(__builtin_strlen) || FMT_GCC_VERSION || FMT_CLANG_VERSION
if (std::is_same<Char, char>::value && !detail::is_constant_evaluated()) {
size_ = __builtin_strlen(detail::narrow(s)); // strlen is not constexpr.
return;
}
#endif
size_t len = 0;
while (*s++) ++len;
size_ = len;
}
template <
typename S,
FMT_ENABLE_IF(detail::is_std_string_like<S>::value&& //
std::is_same<typename S::value_type, Char>::value)>
constexpr basic_string_view(const S& s) noexcept
: data_(s.data()), size_(s.size()) {}
constexpr auto data() const noexcept -> const Char* { return data_; }
constexpr auto size() const noexcept -> size_t { return size_; }
constexpr auto begin() const noexcept -> iterator { return data_; }
constexpr auto end() const noexcept -> iterator { return data_ + size_; }
constexpr auto operator[](size_t pos) const noexcept -> const Char& {
return data_[pos];
}
FMT_CONSTEXPR void remove_prefix(size_t n) noexcept {
data_ += n;
size_ -= n;
}
FMT_CONSTEXPR auto starts_with(basic_string_view sv) const noexcept -> bool {
return size_ >= sv.size_ && detail::compare(data_, sv.data_, sv.size_) == 0;
}
FMT_CONSTEXPR auto starts_with(Char c) const noexcept -> bool {
return size_ >= 1 && *data_ == c;
}
FMT_CONSTEXPR auto starts_with(const Char* s) const -> bool {
return starts_with(basic_string_view(s));
}
FMT_CONSTEXPR auto compare(basic_string_view other) const -> int {
int cmp = detail::compare(data_, other.data_, min_of(size_, other.size_));
if (cmp != 0) return cmp;
return size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
}
FMT_CONSTEXPR friend auto operator==(basic_string_view lhs,
basic_string_view rhs) -> bool {
return lhs.compare(rhs) == 0;
}
friend auto operator!=(basic_string_view lhs, basic_string_view rhs) -> bool {
return lhs.compare(rhs) != 0;
}
friend auto operator<(basic_string_view lhs, basic_string_view rhs) -> bool {
return lhs.compare(rhs) < 0;
}
friend auto operator<=(basic_string_view lhs, basic_string_view rhs) -> bool {
return lhs.compare(rhs) <= 0;
}
friend auto operator>(basic_string_view lhs, basic_string_view rhs) -> bool {
return lhs.compare(rhs) > 0;
}
friend auto operator>=(basic_string_view lhs, basic_string_view rhs) -> bool {
return lhs.compare(rhs) >= 0;
}
};
using string_view = basic_string_view<char>;
template <typename T> class basic_appender;
using appender = basic_appender<char>;
// Checks whether T is a container with contiguous storage.
template <typename T> struct is_contiguous : std::false_type {};
class context;
template <typename OutputIt, typename Char> class generic_context;
template <typename Char> class parse_context;
// Longer aliases for C++20 compatibility.
template <typename Char> using basic_format_parse_context = parse_context<Char>;
using format_parse_context = parse_context<char>;
template <typename OutputIt, typename Char>
using basic_format_context =
conditional_t<std::is_same<OutputIt, appender>::value, context,
generic_context<OutputIt, Char>>;
using format_context = context;
template <typename Char>
using buffered_context =
conditional_t<std::is_same<Char, char>::value, context,
generic_context<basic_appender<Char>, Char>>;
template <typename Context> class basic_format_arg;
template <typename Context> class basic_format_args;
// A separate type would result in shorter symbols but break ABI compatibility
// between clang and gcc on ARM (#1919).
using format_args = basic_format_args<context>;
// A formatter for objects of type T.
template <typename T, typename Char = char, typename Enable = void>
struct formatter {
// A deleted default constructor indicates a disabled formatter.
formatter() = delete;
};
template <typename T, typename Enable = void>
struct locking : std::false_type {};
/// Reports a format error at compile time or, via a `format_error` exception,
/// at runtime.
// This function is intentionally not constexpr to give a compile-time error.
FMT_NORETURN FMT_API void report_error(const char* message);
enum class presentation_type : unsigned char {
// Common specifiers:
none = 0,
debug = 1, // '?'
string = 2, // 's' (string, bool)
// Integral, bool and character specifiers:
dec = 3, // 'd'
hex, // 'x' or 'X'
oct, // 'o'
bin, // 'b' or 'B'
chr, // 'c'
// String and pointer specifiers:
pointer = 3, // 'p'
// Floating-point specifiers:
exp = 1, // 'e' or 'E' (1 since there is no FP debug presentation)
fixed, // 'f' or 'F'
general, // 'g' or 'G'
hexfloat // 'a' or 'A'
};
enum class align { none, left, right, center, numeric };
enum class sign { none, minus, plus, space };
enum class arg_id_kind { none, index, name };
// Basic format specifiers for built-in and string types.
class basic_specs {
private:
// Data is arranged as follows:
//
// 0 1 2 3
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |type |align| w | p | s |u|#|L| f | unused |
// +-----+-----+---+---+---+-+-+-+-----+---------------------------+
//
// w - dynamic width info
// p - dynamic precision info
// s - sign
// u - uppercase (e.g. 'X' for 'x')
// # - alternate form ('#')
// L - localized
// f - fill size
//
// Bitfields are not used because of compiler bugs such as gcc bug 61414.
enum : unsigned {
type_mask = 0x00007,
align_mask = 0x00038,
width_mask = 0x000C0,
precision_mask = 0x00300,
sign_mask = 0x00C00,
uppercase_mask = 0x01000,
alternate_mask = 0x02000,
localized_mask = 0x04000,
fill_size_mask = 0x38000,
align_shift = 3,
width_shift = 6,
precision_shift = 8,
sign_shift = 10,
fill_size_shift = 15,
max_fill_size = 4
};
unsigned data_ = 1 << fill_size_shift;
static_assert(sizeof(basic_specs::data_) * CHAR_BIT >= 18, "");
// Character (code unit) type is erased to prevent template bloat.
char fill_data_[max_fill_size] = {' '};
FMT_CONSTEXPR void set_fill_size(size_t size) {
data_ = (data_ & ~fill_size_mask) | (unsigned(size) << fill_size_shift);
}
public:
constexpr auto type() const -> presentation_type {
return static_cast<presentation_type>(data_ & type_mask);
}
FMT_CONSTEXPR void set_type(presentation_type t) {
data_ = (data_ & ~type_mask) | unsigned(t);
}
constexpr auto align() const -> align {
return static_cast<fmt::align>((data_ & align_mask) >> align_shift);
}
FMT_CONSTEXPR void set_align(fmt::align a) {
data_ = (data_ & ~align_mask) | (unsigned(a) << align_shift);
}
constexpr auto dynamic_width() const -> arg_id_kind {
return static_cast<arg_id_kind>((data_ & width_mask) >> width_shift);
}
FMT_CONSTEXPR void set_dynamic_width(arg_id_kind w) {
data_ = (data_ & ~width_mask) | (unsigned(w) << width_shift);
}
FMT_CONSTEXPR auto dynamic_precision() const -> arg_id_kind {
return static_cast<arg_id_kind>((data_ & precision_mask) >>
precision_shift);
}
FMT_CONSTEXPR void set_dynamic_precision(arg_id_kind p) {
data_ = (data_ & ~precision_mask) | (unsigned(p) << precision_shift);
}
constexpr auto dynamic() const -> bool {
return (data_ & (width_mask | precision_mask)) != 0;
}
constexpr auto sign() const -> sign {
return static_cast<fmt::sign>((data_ & sign_mask) >> sign_shift);
}
FMT_CONSTEXPR void set_sign(fmt::sign s) {
data_ = (data_ & ~sign_mask) | (unsigned(s) << sign_shift);
}
constexpr auto upper() const -> bool { return (data_ & uppercase_mask) != 0; }
FMT_CONSTEXPR void set_upper() { data_ |= uppercase_mask; }
constexpr auto alt() const -> bool { return (data_ & alternate_mask) != 0; }
FMT_CONSTEXPR void set_alt() { data_ |= alternate_mask; }
FMT_CONSTEXPR void clear_alt() { data_ &= ~alternate_mask; }
constexpr auto localized() const -> bool {
return (data_ & localized_mask) != 0;
}
FMT_CONSTEXPR void set_localized() { data_ |= localized_mask; }
constexpr auto fill_size() const -> size_t {
return (data_ & fill_size_mask) >> fill_size_shift;
}
template <typename Char, FMT_ENABLE_IF(std::is_same<Char, char>::value)>
constexpr auto fill() const -> const Char* {
return fill_data_;
}
template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
constexpr auto fill() const -> const Char* {
return nullptr;
}
template <typename Char> constexpr auto fill_unit() const -> Char {
using uchar = unsigned char;
return Char(uchar(fill_data_[0]) | uchar(fill_data_[1]) << 8 |
uchar(fill_data_[2]) << 16);
}
FMT_CONSTEXPR void set_fill(char c) {
fill_data_[0] = c;
set_fill_size(1);
}
template <typename Char>
FMT_CONSTEXPR void set_fill(basic_string_view<Char> s) {
auto size = s.size();
set_fill_size(size);
if (size == 1) {
unsigned uchar = static_cast<detail::unsigned_char<Char>>(s[0]);
fill_data_[0] = char(uchar);
fill_data_[1] = char(uchar >> 8);
fill_data_[2] = char(uchar >> 16);
return;
}
FMT_ASSERT(size <= max_fill_size, "invalid fill");
for (size_t i = 0; i < size; ++i) fill_data_[i & 3] = char(s[i]);
}
FMT_CONSTEXPR void copy_fill_from(const basic_specs& specs) {
set_fill_size(specs.fill_size());
for (size_t i = 0; i < max_fill_size; ++i)
fill_data_[i] = specs.fill_data_[i];
}
};
// Format specifiers for built-in and string types.
struct format_specs : basic_specs {
int width;
int precision;
constexpr format_specs() : width(0), precision(-1) {}
};
/**
* Parsing context consisting of a format string range being parsed and an
* argument counter for automatic indexing.
*/
template <typename Char = char> class parse_context {
private:
basic_string_view<Char> fmt_;
int next_arg_id_;
enum { use_constexpr_cast = !FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200 };
FMT_CONSTEXPR void do_check_arg_id(int arg_id);
public:
using char_type = Char;
using iterator = const Char*;
constexpr explicit parse_context(basic_string_view<Char> fmt,
int next_arg_id = 0)
: fmt_(fmt), next_arg_id_(next_arg_id) {}
/// Returns an iterator to the beginning of the format string range being
/// parsed.
constexpr auto begin() const noexcept -> iterator { return fmt_.begin(); }
/// Returns an iterator past the end of the format string range being parsed.
constexpr auto end() const noexcept -> iterator { return fmt_.end(); }
/// Advances the begin iterator to `it`.
FMT_CONSTEXPR void advance_to(iterator it) {
fmt_.remove_prefix(detail::to_unsigned(it - begin()));
}
/// Reports an error if using the manual argument indexing; otherwise returns
/// the next argument index and switches to the automatic indexing.
FMT_CONSTEXPR auto next_arg_id() -> int {
if (next_arg_id_ < 0) {
report_error("cannot switch from manual to automatic argument indexing");
return 0;
}
int id = next_arg_id_++;
do_check_arg_id(id);
return id;
}
/// Reports an error if using the automatic argument indexing; otherwise
/// switches to the manual indexing.
FMT_CONSTEXPR void check_arg_id(int id) {
if (next_arg_id_ > 0) {
report_error("cannot switch from automatic to manual argument indexing");
return;
}
next_arg_id_ = -1;
do_check_arg_id(id);
}
FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {
next_arg_id_ = -1;
}
FMT_CONSTEXPR void check_dynamic_spec(int arg_id);
};
#ifndef FMT_USE_LOCALE
# define FMT_USE_LOCALE (FMT_OPTIMIZE_SIZE <= 1)
#endif
// A type-erased reference to std::locale to avoid the heavy <locale> include.
class locale_ref {
#if FMT_USE_LOCALE
private:
const void* locale_; // A type-erased pointer to std::locale.
public:
constexpr locale_ref() : locale_(nullptr) {}
template <typename Locale, FMT_ENABLE_IF(sizeof(Locale::collate) != 0)>
locale_ref(const Locale& loc) : locale_(&loc) {
// Check if std::isalpha is found via ADL to reduce the chance of misuse.
detail::ignore_unused(sizeof(isalpha('x', loc)));
}
inline explicit operator bool() const noexcept { return locale_ != nullptr; }
#else
public:
inline explicit operator bool() const noexcept { return false; }
#endif // FMT_USE_LOCALE
public:
template <typename Locale> auto get() const -> Locale;
};
FMT_END_EXPORT
namespace detail {
// Specifies if `T` is a code unit type.
template <typename T> struct is_code_unit : std::false_type {};
template <> struct is_code_unit<char> : std::true_type {};
template <> struct is_code_unit<wchar_t> : std::true_type {};
template <> struct is_code_unit<char16_t> : std::true_type {};
template <> struct is_code_unit<char32_t> : std::true_type {};
#ifdef __cpp_char8_t
template <> struct is_code_unit<char8_t> : bool_constant<is_utf8_enabled> {};
#endif
// Constructs fmt::basic_string_view<Char> from types implicitly convertible
// to it, deducing Char. Explicitly convertible types such as the ones returned
// from FMT_STRING are intentionally excluded.
template <typename Char, FMT_ENABLE_IF(is_code_unit<Char>::value)>
constexpr auto to_string_view(const Char* s) -> basic_string_view<Char> {
return s;
}
template <typename T, FMT_ENABLE_IF(is_std_string_like<T>::value)>
constexpr auto to_string_view(const T& s)
-> basic_string_view<typename T::value_type> {
return s;
}
template <typename Char>
constexpr auto to_string_view(basic_string_view<Char> s)
-> basic_string_view<Char> {
return s;
}
template <typename T, typename Enable = void>
struct has_to_string_view : std::false_type {};
// detail:: is intentional since to_string_view is not an extension point.
template <typename T>
struct has_to_string_view<
T, void_t<decltype(detail::to_string_view(std::declval<T>()))>>
: std::true_type {};
/// String's character (code unit) type. detail:: is intentional to prevent ADL.
template <typename S,
typename V = decltype(detail::to_string_view(std::declval<S>()))>
using char_t = typename V::value_type;
enum class type {
none_type,
// Integer types should go first,
int_type,
uint_type,
long_long_type,
ulong_long_type,
int128_type,
uint128_type,
bool_type,
char_type,
last_integer_type = char_type,
// followed by floating-point types.
float_type,
double_type,
long_double_type,
last_numeric_type = long_double_type,
cstring_type,
string_type,
pointer_type,
custom_type
};
// Maps core type T to the corresponding type enum constant.
template <typename T, typename Char>
struct type_constant : std::integral_constant<type, type::custom_type> {};
#define FMT_TYPE_CONSTANT(Type, constant) \
template <typename Char> \
struct type_constant<Type, Char> \
: std::integral_constant<type, type::constant> {}
FMT_TYPE_CONSTANT(int, int_type);
FMT_TYPE_CONSTANT(unsigned, uint_type);
FMT_TYPE_CONSTANT(long long, long_long_type);
FMT_TYPE_CONSTANT(ullong, ulong_long_type);
FMT_TYPE_CONSTANT(native_int128, int128_type);
FMT_TYPE_CONSTANT(native_uint128, uint128_type);
FMT_TYPE_CONSTANT(bool, bool_type);
FMT_TYPE_CONSTANT(Char, char_type);
FMT_TYPE_CONSTANT(float, float_type);
FMT_TYPE_CONSTANT(double, double_type);
FMT_TYPE_CONSTANT(long double, long_double_type);
FMT_TYPE_CONSTANT(const Char*, cstring_type);
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