mirror of
https://github.com/fmtlib/fmt.git
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863 lines
32 KiB
Plaintext
863 lines
32 KiB
Plaintext
// Formatting library for C++ - the standard API implementation
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//
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// Copyright (c) 2012 - present, Victor Zverovich
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// All rights reserved.
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//
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// For the license information refer to format.h.
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#ifndef FMT_FORMAT_
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#define FMT_FORMAT_
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#include <variant>
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#include "fmt/format.h"
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// This implementation verifies the correctness of the standard API proposed in
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// P0645 Text Formatting and is optimized for copy-pasting from the paper, not
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// for efficiency or readability. An efficient implementation should not use
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// std::variant and should store packed argument type tags separately from
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// values in basic_format_args for small number of arguments.
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namespace std {
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template<class T>
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constexpr bool Integral = is_integral_v<T>;
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template <class O>
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using iter_difference_t = ptrdiff_t;
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}
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// https://fmt.dev/Text%20Formatting.html#format.syn
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namespace std {
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// [format.error], class format_error
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class format_error;
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// [format.formatter], formatter
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template<class charT> class basic_format_parse_context;
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using format_parse_context = basic_format_parse_context<char>;
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using wformat_parse_context = basic_format_parse_context<wchar_t>;
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template<class Out, class charT> class basic_format_context;
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using format_context = basic_format_context<
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/* unspecified */ std::back_insert_iterator<fmt::internal::buffer<char>>, char>;
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using wformat_context = basic_format_context<
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/* unspecified */ std::back_insert_iterator<fmt::internal::buffer<wchar_t>>, wchar_t>;
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template<class T, class charT = char> struct formatter {
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formatter() = delete;
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};
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// [format.arguments], arguments
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template<class Context> class basic_format_arg;
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template<class Visitor, class Context>
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/* see below */ auto visit_format_arg(Visitor&& vis, basic_format_arg<Context> arg);
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template<class Context, class... Args> struct format_arg_store; // exposition only
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template<class Context> class basic_format_args;
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using format_args = basic_format_args<format_context>;
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using wformat_args = basic_format_args<wformat_context>;
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template<class Out, class charT>
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using format_args_t = basic_format_args<basic_format_context<Out, charT>>;
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template<class Context = format_context, class... Args>
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format_arg_store<Context, Args...>
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make_format_args(const Args&... args);
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template<class... Args>
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format_arg_store<wformat_context, Args...>
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make_wformat_args(const Args&... args);
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// [format.functions], formatting functions
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template<class... Args>
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string format(string_view fmt, const Args&... args);
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template<class... Args>
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wstring format(wstring_view fmt, const Args&... args);
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string vformat(string_view fmt, format_args args);
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wstring vformat(wstring_view fmt, wformat_args args);
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template<class Out, class... Args>
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Out format_to(Out out, string_view fmt, const Args&... args);
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template<class Out, class... Args>
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Out format_to(Out out, wstring_view fmt, const Args&... args);
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template<class Out>
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Out vformat_to(Out out, string_view fmt, format_args_t<Out, char> args);
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template<class Out>
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Out vformat_to(Out out, wstring_view fmt, format_args_t<Out, wchar_t> args);
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template<class Out>
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struct format_to_n_result {
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Out out;
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iter_difference_t<Out> size;
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};
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template<class Out, class... Args>
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format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
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string_view fmt, const Args&... args);
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template<class Out, class... Args>
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format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
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wstring_view fmt, const Args&... args);
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template<class... Args>
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size_t formatted_size(string_view fmt, const Args&... args);
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template<class... Args>
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size_t formatted_size(wstring_view fmt, const Args&... args);
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}
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// https://fmt.dev/Text%20Formatting.html#format.error
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namespace std {
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class format_error : public runtime_error {
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public:
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explicit format_error(const string& what_arg) : runtime_error(what_arg) {}
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explicit format_error(const char* what_arg) : runtime_error(what_arg) {}
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};
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}
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namespace std {
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namespace detail {
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struct error_handler {
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// This function is intentionally not constexpr to give a compile-time error.
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void on_error(const char* message) {
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throw std::format_error(message);
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}
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};
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}
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}
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// https://fmt.dev/Text%20Formatting.html#format.parse_context
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namespace std {
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template<class charT>
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class basic_format_parse_context {
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public:
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using char_type = charT;
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using const_iterator = typename basic_string_view<charT>::const_iterator;
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using iterator = const_iterator;
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private:
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iterator begin_; // exposition only
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iterator end_; // exposition only
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enum indexing { unknown, manual, automatic }; // exposition only
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indexing indexing_; // exposition only
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size_t next_arg_id_; // exposition only
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size_t num_args_; // exposition only
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public:
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explicit constexpr basic_format_parse_context(basic_string_view<charT> fmt,
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size_t num_args = 0) noexcept;
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basic_format_parse_context(const basic_format_parse_context&) = delete;
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basic_format_parse_context& operator=(const basic_format_parse_context&) = delete;
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constexpr const_iterator begin() const noexcept;
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constexpr const_iterator end() const noexcept;
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constexpr void advance_to(const_iterator it);
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constexpr size_t next_arg_id();
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constexpr void check_arg_id(size_t id);
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// Implementation detail:
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constexpr void check_arg_id(fmt::string_view) {}
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detail::error_handler error_handler() const { return {}; }
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void on_error(const char* msg) { error_handler().on_error(msg); }
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};
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}
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namespace std {
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template<class charT>
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/* explicit */ constexpr basic_format_parse_context<charT>::
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basic_format_parse_context(basic_string_view<charT> fmt,
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size_t num_args) noexcept
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: begin_(fmt.begin()), end_(fmt.end()), indexing_(unknown), next_arg_id_(0), num_args_(num_args) {}
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template<class charT>
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constexpr typename basic_format_parse_context<charT>::const_iterator basic_format_parse_context<charT>::begin() const noexcept { return begin_; }
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template<class charT>
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constexpr typename basic_format_parse_context<charT>::const_iterator basic_format_parse_context<charT>::end() const noexcept { return end_; }
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template<class charT>
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constexpr void basic_format_parse_context<charT>::advance_to(typename basic_format_parse_context<charT>::iterator it) { begin_ = it; }
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template<class charT>
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constexpr size_t basic_format_parse_context<charT>::next_arg_id() {
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if (indexing_ == manual)
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throw format_error("manual to automatic indexing");
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if (indexing_ == unknown)
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indexing_ = automatic;
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return next_arg_id_++;
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}
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template<class charT>
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constexpr void basic_format_parse_context<charT>::check_arg_id(size_t id) {
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// clang doesn't support __builtin_is_constant_evaluated yet
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//if (!(!__builtin_is_constant_evaluated() || id < num_args_))
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// throw format_error(invalid index is out of range");
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if (indexing_ == automatic)
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throw format_error("automatic to manual indexing");
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if (indexing_ == unknown)
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indexing_ = manual;
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}
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}
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// https://fmt.dev/Text%20Formatting.html#format.context
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namespace std {
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template<class Out, class charT>
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class basic_format_context {
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basic_format_args<basic_format_context> args_; // exposition only
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Out out_; // exposition only
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public:
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using iterator = Out;
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using char_type = charT;
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template<class T> using formatter_type = formatter<T, charT>;
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basic_format_arg<basic_format_context> arg(size_t id) const;
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iterator out();
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void advance_to(iterator it);
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// Implementation details:
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using format_arg = basic_format_arg<basic_format_context>;
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basic_format_context(Out out, basic_format_args<basic_format_context> args, fmt::internal::locale_ref)
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: args_(args), out_(out) {}
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detail::error_handler error_handler() const { return {}; }
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basic_format_arg<basic_format_context> arg(fmt::basic_string_view<charT>) const {
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return {}; // unused: named arguments are not supported yet
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}
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void on_error(const char* msg) { error_handler().on_error(msg); }
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};
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}
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namespace std {
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template<class O, class charT>
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basic_format_arg<basic_format_context<O, charT>> basic_format_context<O, charT>::arg(size_t id) const { return args_.get(id); }
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template<class O, class charT>
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typename basic_format_context<O, charT>::iterator basic_format_context<O, charT>::out() { return out_; }
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template<class O, class charT>
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void basic_format_context<O, charT>::advance_to(typename basic_format_context<O, charT>::iterator it) { out_ = it; }
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}
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namespace std {
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namespace detail {
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template <typename T>
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constexpr bool is_standard_integer_v =
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std::is_same_v<T, signed char> ||
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std::is_same_v<T, short int> ||
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std::is_same_v<T, int> ||
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std::is_same_v<T, long int> ||
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std::is_same_v<T, long long int>;
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template <typename T>
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constexpr bool is_standard_unsigned_integer_v =
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std::is_same_v<T, unsigned char> ||
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std::is_same_v<T, unsigned short int> ||
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std::is_same_v<T, unsigned int> ||
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std::is_same_v<T, unsigned long int> ||
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std::is_same_v<T, unsigned long long int>;
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template <typename T, typename Char> struct formatter;
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}
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}
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// https://fmt.dev/Text%20Formatting.html#format.arg
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namespace std {
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template<class Context>
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class basic_format_arg {
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public:
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class handle;
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private:
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using char_type = typename Context::char_type; // exposition only
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variant<monostate, bool, char_type,
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int, unsigned int, long long int, unsigned long long int,
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double, long double,
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const char_type*, basic_string_view<char_type>,
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const void*, handle> value; // exposition only
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template<typename T,
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typename = enable_if_t<
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std::is_same_v<T, bool> ||
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std::is_same_v<T, char_type> ||
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(std::is_same_v<T, char> && std::is_same_v<char_type, wchar_t>) ||
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detail::is_standard_integer_v<T> ||
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detail::is_standard_unsigned_integer_v<T> ||
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is_default_constructible_v<typename Context::template formatter_type<T>>
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>> explicit basic_format_arg(const T& v) noexcept; // exposition only
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explicit basic_format_arg(float n) noexcept; // exposition only
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explicit basic_format_arg(double n) noexcept; // exposition only
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explicit basic_format_arg(long double n) noexcept; // exposition only
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explicit basic_format_arg(const char_type* s); // exposition only
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template<class traits>
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explicit basic_format_arg(
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basic_string_view<char_type, traits> s) noexcept; // exposition only
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template<class traits, class Allocator>
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explicit basic_format_arg(
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const basic_string<char_type, traits, Allocator>& s) noexcept; // exposition only
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explicit basic_format_arg(nullptr_t) noexcept; // exposition only
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template<class T, typename = enable_if_t<is_void_v<T>>>
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explicit basic_format_arg(const T* p) noexcept; // exposition only
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// Fails due to a bug in clang
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//template<class Visitor, class Ctx>
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// friend auto visit_format_arg(Visitor&& vis,
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// basic_format_arg<Ctx> arg); // exposition only
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friend auto get_value(basic_format_arg arg) {
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return arg.value;
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}
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template <typename T, typename Char> friend struct detail::formatter;
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template<class Ctx, class... Args>
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friend format_arg_store<Ctx, Args...>
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make_format_args(const Args&... args); // exposition only
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public:
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basic_format_arg() noexcept;
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explicit operator bool() const noexcept;
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};
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}
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namespace std {
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template<class Context>
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basic_format_arg<Context>::basic_format_arg() noexcept {}
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template<class Context>
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template<class T, typename> /* explicit */ basic_format_arg<Context>::basic_format_arg(const T& v) noexcept {
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if constexpr (std::is_same_v<T, bool> || std::is_same_v<T, char_type>)
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value = v;
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else if constexpr (std::is_same_v<T, char> && std::is_same_v<char_type, wchar_t>)
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value = static_cast<wchar_t>(v);
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else if constexpr (detail::is_standard_integer_v<T> && sizeof(T) <= sizeof(int))
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value = static_cast<int>(v);
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else if constexpr (detail::is_standard_unsigned_integer_v<T> && sizeof(T) <= sizeof(unsigned))
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value = static_cast<unsigned>(v);
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else if constexpr (detail::is_standard_integer_v<T>)
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value = static_cast<long long int>(v);
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else if constexpr (detail::is_standard_unsigned_integer_v<T>)
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value = static_cast<unsigned long long int>(v);
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else if constexpr (is_default_constructible_v<typename Context::template formatter_type<T>>)
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value = handle(v);
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}
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template<class Context>
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/* explicit */ basic_format_arg<Context>::basic_format_arg(float n) noexcept
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: value(static_cast<double>(n)) {}
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template<class Context>
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/* explicit */ basic_format_arg<Context>::basic_format_arg(double n) noexcept
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: value(n) {}
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template<class Context>
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/* explicit */ basic_format_arg<Context>::basic_format_arg(long double n) noexcept
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: value(n) {}
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template<class Context>
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/* explicit */ basic_format_arg<Context>::basic_format_arg(const typename basic_format_arg<Context>::char_type* s)
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: value(s) {
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assert(s != nullptr);
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}
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template<class Context>
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template<class traits>
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/* explicit */ basic_format_arg<Context>::basic_format_arg(basic_string_view<char_type, traits> s) noexcept
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: value(s) {}
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template<class Context>
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template<class traits, class Allocator>
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/* explicit */ basic_format_arg<Context>::basic_format_arg(
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const basic_string<char_type, traits, Allocator>& s) noexcept
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: value(basic_string_view<char_type>(s.data(), s.size())) {}
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template<class Context>
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/* explicit */ basic_format_arg<Context>::basic_format_arg(nullptr_t) noexcept
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: value(static_cast<const void*>(nullptr)) {}
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template<class Context>
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template<class T, typename> /* explicit */ basic_format_arg<Context>::basic_format_arg(const T* p) noexcept
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: value(p) {}
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template<class Context>
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/* explicit */ basic_format_arg<Context>::operator bool() const noexcept {
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return !holds_alternative<monostate>(value);
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}
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}
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namespace std {
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template<class Context>
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class basic_format_arg<Context>::handle {
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const void* ptr_; // exposition only
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void (*format_)(basic_format_parse_context<char_type>&,
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Context&, const void*); // exposition only
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template<class T> explicit handle(const T& val) noexcept; // exposition only
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friend class basic_format_arg<Context>; // exposition only
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public:
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void format(basic_format_parse_context<char_type>&, Context& ctx) const;
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};
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}
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namespace std {
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template<class Context>
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template<class T> /* explicit */ basic_format_arg<Context>::handle::handle(const T& val) noexcept
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: ptr_(&val), format_([](basic_format_parse_context<char_type>& parse_ctx, Context& format_ctx, const void* ptr) {
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typename Context::template formatter_type<T> f;
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parse_ctx.advance_to(f.parse(parse_ctx));
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format_ctx.advance_to(f.format(*static_cast<const T*>(ptr), format_ctx));
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}) {}
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template<class Context>
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void basic_format_arg<Context>::handle::format(basic_format_parse_context<char_type>& parse_ctx, Context& format_ctx) const {
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format_(parse_ctx, format_ctx, ptr_);
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}
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// https://fmt.dev/Text%20Formatting.html#format.visit
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template<class Visitor, class Context>
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auto visit_format_arg(Visitor&& vis, basic_format_arg<Context> arg) {
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return visit(vis, get_value(arg));
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}
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}
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// https://fmt.dev/Text%20Formatting.html#format.store
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namespace std {
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template<class Context, class... Args>
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struct format_arg_store { // exposition only
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array<basic_format_arg<Context>, sizeof...(Args)> args;
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};
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}
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// https://fmt.dev/Text%20Formatting.html#format.basic_args
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namespace std {
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template<class Context>
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class basic_format_args {
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size_t size_; // exposition only
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const basic_format_arg<Context>* data_; // exposition only
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public:
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basic_format_args() noexcept;
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template<class... Args>
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basic_format_args(const format_arg_store<Context, Args...>& store) noexcept;
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basic_format_arg<Context> get(size_t i) const noexcept;
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};
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}
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namespace std {
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template<class Context>
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basic_format_args<Context>::basic_format_args() noexcept : size_(0) {}
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template<class Context>
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template<class... Args>
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basic_format_args<Context>::basic_format_args(const format_arg_store<Context, Args...>& store) noexcept
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: size_(sizeof...(Args)), data_(store.args.data()) {}
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template<class Context>
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basic_format_arg<Context> basic_format_args<Context>::get(size_t i) const noexcept {
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return i < size_ ? data_[i] : basic_format_arg<Context>();
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}
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}
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namespace std {
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// https://fmt.dev/Text%20Formatting.html#format.make_args
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template<class Context /*= format_context*/, class... Args>
|
|
format_arg_store<Context, Args...> make_format_args(const Args&... args) {
|
|
return {basic_format_arg<Context>(args)...};
|
|
}
|
|
|
|
// https://fmt.dev/Text%20Formatting.html#format.make_wargs
|
|
template<class... Args>
|
|
format_arg_store<wformat_context, Args...> make_wformat_args(const Args&... args) {
|
|
return make_format_args<wformat_context>(args...);
|
|
}
|
|
}
|
|
|
|
namespace std {
|
|
namespace detail {
|
|
|
|
template <typename Range>
|
|
class arg_formatter
|
|
: public fmt::internal::arg_formatter_base<Range, error_handler> {
|
|
private:
|
|
using char_type = typename Range::value_type;
|
|
using base = fmt::internal::arg_formatter_base<Range, error_handler>;
|
|
using format_context = std::basic_format_context<typename base::iterator, char_type>;
|
|
using parse_context = basic_format_parse_context<char_type>;
|
|
|
|
parse_context* parse_ctx_;
|
|
format_context& ctx_;
|
|
|
|
public:
|
|
typedef Range range;
|
|
typedef typename base::iterator iterator;
|
|
typedef typename base::format_specs format_specs;
|
|
|
|
/**
|
|
\rst
|
|
Constructs an argument formatter object.
|
|
*ctx* is a reference to the formatting context,
|
|
*spec* contains format specifier information for standard argument types.
|
|
\endrst
|
|
*/
|
|
arg_formatter(format_context& ctx, parse_context* parse_ctx = nullptr, fmt::format_specs* spec = nullptr)
|
|
: base(Range(ctx.out()), spec, {}), parse_ctx_(parse_ctx), ctx_(ctx) {}
|
|
|
|
using base::operator();
|
|
|
|
/** Formats an argument of a user-defined type. */
|
|
iterator operator()(typename std::basic_format_arg<format_context>::handle handle) {
|
|
handle.format(*parse_ctx_, ctx_);
|
|
return this->out();
|
|
}
|
|
|
|
iterator operator()(monostate) {
|
|
throw format_error("");
|
|
}
|
|
};
|
|
|
|
template <typename Context>
|
|
inline fmt::internal::type get_type(basic_format_arg<Context> arg) {
|
|
return visit_format_arg([&] (auto val) {
|
|
using char_type = typename Context::char_type;
|
|
using T = decltype(val);
|
|
if (std::is_same_v<T, monostate>)
|
|
return fmt::internal::none_type;
|
|
if (std::is_same_v<T, bool>)
|
|
return fmt::internal::bool_type;
|
|
if (std::is_same_v<T, char_type>)
|
|
return fmt::internal::char_type;
|
|
if (std::is_same_v<T, int>)
|
|
return fmt::internal::int_type;
|
|
if (std::is_same_v<T, unsigned int>)
|
|
return fmt::internal::uint_type;
|
|
if (std::is_same_v<T, long long int>)
|
|
return fmt::internal::long_long_type;
|
|
if (std::is_same_v<T, unsigned long long int>)
|
|
return fmt::internal::ulong_long_type;
|
|
if (std::is_same_v<T, double>)
|
|
return fmt::internal::double_type;
|
|
if (std::is_same_v<T, long double>)
|
|
return fmt::internal::long_double_type;
|
|
if (std::is_same_v<T, const char_type*>)
|
|
return fmt::internal::cstring_type;
|
|
if (std::is_same_v<T, basic_string_view<char_type>>)
|
|
return fmt::internal::string_type;
|
|
if (std::is_same_v<T, const void*>)
|
|
return fmt::internal::pointer_type;
|
|
assert(get_value(arg).index() == 12);
|
|
return fmt::internal::custom_type;
|
|
}, arg);
|
|
}
|
|
|
|
template <typename Context>
|
|
class custom_formatter {
|
|
private:
|
|
using parse_context = basic_format_parse_context<typename Context::char_type>;
|
|
parse_context& parse_ctx_;
|
|
Context& format_ctx_;
|
|
|
|
public:
|
|
custom_formatter(parse_context& parse_ctx, Context& ctx) : parse_ctx_(parse_ctx), format_ctx_(ctx) {}
|
|
|
|
bool operator()(typename basic_format_arg<Context>::handle h) const {
|
|
h.format(parse_ctx_, format_ctx_);
|
|
return true;
|
|
}
|
|
|
|
template <typename T> bool operator()(T) const { return false; }
|
|
};
|
|
|
|
template <typename ArgFormatter, typename Char, typename Context>
|
|
struct format_handler : detail::error_handler {
|
|
typedef typename ArgFormatter::range range;
|
|
|
|
format_handler(range r, basic_string_view<Char> str,
|
|
basic_format_args<Context> format_args,
|
|
fmt::internal::locale_ref loc)
|
|
: parse_ctx(str), context(r.begin(), format_args, loc) {}
|
|
|
|
void on_text(const Char* begin, const Char* end) {
|
|
auto size = fmt::internal::to_unsigned(end - begin);
|
|
auto out = context.out();
|
|
auto&& it = fmt::internal::reserve(out, size);
|
|
it = std::copy_n(begin, size, it);
|
|
context.advance_to(out);
|
|
}
|
|
|
|
void on_arg_id() {
|
|
arg = context.arg(parse_ctx.next_arg_id());
|
|
}
|
|
void on_arg_id(unsigned id) {
|
|
parse_ctx.check_arg_id(id);
|
|
arg = context.arg(id);
|
|
}
|
|
void on_arg_id(fmt::basic_string_view<Char>) {}
|
|
|
|
void on_replacement_field(const Char* p) {
|
|
parse_ctx.advance_to(parse_ctx.begin() + (p - &*parse_ctx.begin()));
|
|
custom_formatter<Context> f(parse_ctx, context);
|
|
if (!visit_format_arg(f, arg))
|
|
context.advance_to(visit_format_arg(ArgFormatter(context, &parse_ctx), arg));
|
|
}
|
|
|
|
const Char* on_format_specs(const Char* begin, const Char* end) {
|
|
parse_ctx.advance_to(parse_ctx.begin() + (begin - &*parse_ctx.begin()));
|
|
custom_formatter<Context> f(parse_ctx, context);
|
|
if (visit_format_arg(f, arg)) return &*parse_ctx.begin();
|
|
fmt::basic_format_specs<Char> specs;
|
|
using fmt::internal::specs_handler;
|
|
using parse_context = basic_format_parse_context<Char>;
|
|
fmt::internal::specs_checker<specs_handler<parse_context, Context>> handler(
|
|
specs_handler<parse_context, Context>(specs, parse_ctx, context), get_type(arg));
|
|
begin = parse_format_specs(begin, end, handler);
|
|
if (begin == end || *begin != '}') on_error("missing '}' in format string");
|
|
parse_ctx.advance_to(parse_ctx.begin() + (begin - &*parse_ctx.begin()));
|
|
context.advance_to(visit_format_arg(ArgFormatter(context, &parse_ctx, &specs), arg));
|
|
return begin;
|
|
}
|
|
|
|
basic_format_parse_context<Char> parse_ctx;
|
|
Context context;
|
|
basic_format_arg<Context> arg;
|
|
};
|
|
|
|
template <typename T, typename Char>
|
|
struct formatter {
|
|
// Parses format specifiers stopping either at the end of the range or at the
|
|
// terminating '}'.
|
|
template <typename ParseContext>
|
|
FMT_CONSTEXPR typename ParseContext::iterator parse(ParseContext& ctx) {
|
|
namespace internal = fmt::internal;
|
|
typedef internal::dynamic_specs_handler<ParseContext> handler_type;
|
|
auto type = internal::mapped_type_constant<T, fmt::buffer_context<Char>>::value;
|
|
internal::specs_checker<handler_type> handler(handler_type(specs_, ctx),
|
|
type);
|
|
auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
|
|
auto type_spec = specs_.type;
|
|
auto eh = ctx.error_handler();
|
|
switch (type) {
|
|
case internal::none_type:
|
|
case internal::named_arg_type:
|
|
FMT_ASSERT(false, "invalid argument type");
|
|
break;
|
|
case internal::int_type:
|
|
case internal::uint_type:
|
|
case internal::long_long_type:
|
|
case internal::ulong_long_type:
|
|
case internal::bool_type:
|
|
handle_int_type_spec(type_spec,
|
|
internal::int_type_checker<decltype(eh)>(eh));
|
|
break;
|
|
case internal::char_type:
|
|
handle_char_specs(
|
|
&specs_, internal::char_specs_checker<decltype(eh)>(type_spec, eh));
|
|
break;
|
|
case internal::double_type:
|
|
case internal::long_double_type:
|
|
handle_float_type_spec(type_spec,
|
|
internal::float_type_checker<decltype(eh)>(eh));
|
|
break;
|
|
case internal::cstring_type:
|
|
internal::handle_cstring_type_spec(
|
|
type_spec, internal::cstring_type_checker<decltype(eh)>(eh));
|
|
break;
|
|
case internal::string_type:
|
|
internal::check_string_type_spec(type_spec, eh);
|
|
break;
|
|
case internal::pointer_type:
|
|
internal::check_pointer_type_spec(type_spec, eh);
|
|
break;
|
|
case internal::custom_type:
|
|
// Custom format specifiers should be checked in parse functions of
|
|
// formatter specializations.
|
|
break;
|
|
}
|
|
return it;
|
|
}
|
|
|
|
template <typename FormatContext>
|
|
auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
|
|
fmt::internal::handle_dynamic_spec<fmt::internal::width_checker>(
|
|
specs_.width_, specs_.width_ref, ctx, nullptr);
|
|
fmt::internal::handle_dynamic_spec<fmt::internal::precision_checker>(
|
|
specs_.precision, specs_.precision_ref, ctx, nullptr);
|
|
typedef fmt::output_range<typename FormatContext::iterator,
|
|
typename FormatContext::char_type>
|
|
range_type;
|
|
return visit_format_arg(arg_formatter<range_type>(ctx, nullptr, &specs_),
|
|
basic_format_arg<FormatContext>(val));
|
|
}
|
|
|
|
private:
|
|
fmt::internal::dynamic_format_specs<Char> specs_;
|
|
};
|
|
} // namespace detail
|
|
|
|
// https://fmt.dev/Text%20Formatting.html#format.functions
|
|
template<class... Args>
|
|
string format(string_view fmt, const Args&... args) {
|
|
return vformat(fmt, make_format_args(args...));
|
|
}
|
|
|
|
template<class... Args>
|
|
wstring format(wstring_view fmt, const Args&... args) {
|
|
return vformat(fmt, make_wformat_args(args...));
|
|
}
|
|
|
|
string vformat(string_view fmt, format_args args) {
|
|
fmt::memory_buffer mbuf;
|
|
fmt::internal::buffer<char>& buf = mbuf;
|
|
using range = fmt::internal::buffer_range<char>;
|
|
detail::format_handler<detail::arg_formatter<range>, char, format_context>
|
|
h(range(std::back_inserter(buf)), fmt, args, {});
|
|
fmt::internal::parse_format_string<false>(fmt::to_string_view(fmt), h);
|
|
return to_string(mbuf);
|
|
}
|
|
|
|
wstring vformat(wstring_view fmt, wformat_args args);
|
|
|
|
template<class Out, class... Args>
|
|
Out format_to(Out out, string_view fmt, const Args&... args) {
|
|
using context = basic_format_context<Out, decltype(fmt)::value_type>;
|
|
return vformat_to(out, fmt, {make_format_args<context>(args...)});
|
|
}
|
|
|
|
template<class Out, class... Args>
|
|
Out format_to(Out out, wstring_view fmt, const Args&... args) {
|
|
using context = basic_format_context<Out, decltype(fmt)::value_type>;
|
|
return vformat_to(out, fmt, {make_format_args<context>(args...)});
|
|
}
|
|
|
|
template<class Out>
|
|
Out vformat_to(Out out, string_view fmt, format_args_t<Out, char> args) {
|
|
typedef fmt::output_range<Out, char> range;
|
|
detail::format_handler<detail::arg_formatter<range>, char, basic_format_context<Out, char>>
|
|
h(range(out), fmt, args, {});
|
|
fmt::internal::parse_format_string<false>(fmt::to_string_view(fmt), h);
|
|
return h.context.out();
|
|
}
|
|
|
|
template<class Out>
|
|
Out vformat_to(Out out, wstring_view fmt, format_args_t<Out, wchar_t> args);
|
|
|
|
template<class Out, class... Args>
|
|
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
|
|
string_view fmt, const Args&... args);
|
|
template<class Out, class... Args>
|
|
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
|
|
wstring_view fmt, const Args&... args);
|
|
|
|
template<class... Args>
|
|
size_t formatted_size(string_view fmt, const Args&... args);
|
|
template<class... Args>
|
|
size_t formatted_size(wstring_view fmt, const Args&... args);
|
|
|
|
#define charT char
|
|
|
|
template<> struct formatter<charT, charT> : detail::formatter<charT, charT> {};
|
|
|
|
template<> struct formatter<char, wchar_t>;
|
|
|
|
template<> struct formatter<charT*, charT> : detail::formatter<const charT*, charT> {};
|
|
|
|
template<> struct formatter<const charT*, charT> : detail::formatter<const charT*, charT> {};
|
|
|
|
template<size_t N> struct formatter<const charT[N], charT>
|
|
: detail::formatter<std::basic_string_view<charT>, charT> {};
|
|
|
|
template<class traits, class Allocator>
|
|
struct formatter<basic_string<charT, traits, Allocator>, charT>
|
|
: detail::formatter<std::basic_string_view<charT>, charT> {};
|
|
|
|
template<class traits>
|
|
struct formatter<basic_string_view<charT, traits>, charT>
|
|
: detail::formatter<std::basic_string_view<charT>, charT> {};
|
|
|
|
template <> struct formatter<nullptr_t, charT> : detail::formatter<const void*, charT> {};
|
|
template <> struct formatter<void*, charT> : detail::formatter<const void*, charT> {};
|
|
template <> struct formatter<const void*, charT> : detail::formatter<const void*, charT> {};
|
|
template <> struct formatter<bool, charT> : detail::formatter<bool, charT> {};
|
|
|
|
template <> struct formatter<signed char, charT> : detail::formatter<int, charT> {};
|
|
template <> struct formatter<short, charT> : detail::formatter<int, charT> {};
|
|
template <> struct formatter<int, charT> : detail::formatter<int, charT> {};
|
|
template <> struct formatter<long, charT>
|
|
: detail::formatter<std::conditional_t<sizeof(long) == sizeof(int), int, long long>, charT> {};
|
|
template <> struct formatter<long long, charT> : detail::formatter<long long, charT> {};
|
|
template <> struct formatter<unsigned char, charT> : detail::formatter<unsigned int, charT> {};
|
|
template <> struct formatter<unsigned short, charT> : detail::formatter<unsigned int, charT> {};
|
|
template <> struct formatter<unsigned int, charT> : detail::formatter<unsigned int, charT> {};
|
|
template <> struct formatter<unsigned long, charT>
|
|
: detail::formatter<std::conditional_t<sizeof(long) == sizeof(int), unsigned, unsigned long long>, charT> {};
|
|
template <> struct formatter<unsigned long long, charT> : detail::formatter<unsigned long long, charT> {};
|
|
|
|
template <> struct formatter<float, charT> : detail::formatter<double, charT> {};
|
|
template <> struct formatter<double, charT> : detail::formatter<double, charT> {};
|
|
template <> struct formatter<long double, charT> : detail::formatter<long double, charT> {};
|
|
|
|
#undef charT
|
|
|
|
#define charT wchar_t
|
|
|
|
template<> struct formatter<charT, charT> : detail::formatter<charT, charT> {};
|
|
|
|
template<> struct formatter<char, wchar_t> : detail::formatter<charT, charT> {};
|
|
|
|
template<> struct formatter<charT*, charT> : detail::formatter<const charT*, charT> {};
|
|
|
|
template<> struct formatter<const charT*, charT> : detail::formatter<const charT*, charT> {};
|
|
|
|
template<size_t N> struct formatter<const charT[N], charT>
|
|
: detail::formatter<std::basic_string_view<charT>, charT> {};
|
|
|
|
template<class traits, class Allocator>
|
|
struct formatter<std::basic_string<charT, traits, Allocator>, charT>
|
|
: detail::formatter<std::basic_string_view<charT>, charT> {};
|
|
|
|
template<class traits>
|
|
struct formatter<std::basic_string_view<charT, traits>, charT>
|
|
: detail::formatter<std::basic_string_view<charT>, charT> {};
|
|
|
|
template <> struct formatter<nullptr_t, charT> : detail::formatter<const void*, charT> {};
|
|
template <> struct formatter<void*, charT> : detail::formatter<const void*, charT> {};
|
|
template <> struct formatter<const void*, charT> : detail::formatter<const void*, charT> {};
|
|
template <> struct formatter<bool, charT> : detail::formatter<bool, charT> {};
|
|
|
|
template <> struct formatter<signed char, charT> : detail::formatter<int, charT> {};
|
|
template <> struct formatter<short, charT> : detail::formatter<int, charT> {};
|
|
template <> struct formatter<int, charT> : detail::formatter<int, charT> {};
|
|
template <> struct formatter<long, charT>
|
|
: detail::formatter<std::conditional_t<sizeof(long) == sizeof(int), int, long long>, charT> {};
|
|
template <> struct formatter<long long, charT> : detail::formatter<long long, charT> {};
|
|
template <> struct formatter<unsigned char, charT> : detail::formatter<unsigned int, charT> {};
|
|
template <> struct formatter<unsigned short, charT> : detail::formatter<unsigned int, charT> {};
|
|
template <> struct formatter<unsigned int, charT> : detail::formatter<unsigned int, charT> {};
|
|
template <> struct formatter<unsigned long, charT>
|
|
: detail::formatter<std::conditional_t<sizeof(long) == sizeof(int), unsigned, unsigned long long>, charT> {};
|
|
template <> struct formatter<unsigned long long, charT> : detail::formatter<unsigned long long, charT> {};
|
|
|
|
template <> struct formatter<float, charT> : detail::formatter<double, charT> {};
|
|
template <> struct formatter<double, charT> : detail::formatter<double, charT> {};
|
|
template <> struct formatter<long double, charT> : detail::formatter<long double, charT> {};
|
|
|
|
#undef charT
|
|
|
|
template<> struct formatter<const wchar_t, char> {
|
|
formatter() = delete;
|
|
};
|
|
}
|
|
|
|
#endif // FMT_FORMAT_
|