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Simplify default formatter
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@ -3074,18 +3074,17 @@ FMT_CONSTEXPR20 void format_hexfloat(Float value, format_specs specs,
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// Assume Float is in the format [sign][exponent][significand].
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using carrier_uint = typename info::carrier_uint;
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constexpr auto num_float_significand_bits =
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detail::num_significand_bits<Float>();
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const auto num_float_significand_bits = detail::num_significand_bits<Float>();
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basic_fp<carrier_uint> f(value);
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f.e += num_float_significand_bits;
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if (!has_implicit_bit<Float>()) --f.e;
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constexpr auto num_fraction_bits =
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const auto num_fraction_bits =
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num_float_significand_bits + (has_implicit_bit<Float>() ? 1 : 0);
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constexpr auto num_xdigits = (num_fraction_bits + 3) / 4;
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const auto num_xdigits = (num_fraction_bits + 3) / 4;
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constexpr auto leading_shift = ((num_xdigits - 1) * 4);
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const auto leading_shift = ((num_xdigits - 1) * 4);
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const auto leading_mask = carrier_uint(0xF) << leading_shift;
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const auto leading_xdigit =
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static_cast<uint32_t>((f.f & leading_mask) >> leading_shift);
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@ -3640,21 +3639,19 @@ FMT_CONSTEXPR auto write(OutputIt out, const T& value)
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// An argument visitor that formats the argument and writes it via the output
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// iterator. It's a class and not a generic lambda for compatibility with C++11.
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template <typename Char> struct default_arg_formatter {
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using iterator = basic_appender<Char>;
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using context = buffered_context<Char>;
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iterator out;
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basic_format_args<context> args;
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locale_ref loc;
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basic_appender<Char> out;
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template <typename T> auto operator()(T value) -> iterator {
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return write<Char>(out, value);
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}
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auto operator()(typename basic_format_arg<context>::handle h) -> iterator {
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basic_format_parse_context<Char> parse_ctx({});
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context format_ctx(out, args, loc);
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void operator()(monostate) { report_error("argument not found"); }
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template <typename T> void operator()(T value) { write<Char>(out, value); }
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void operator()(typename basic_format_arg<context>::handle h) {
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// Use a null locale since the default format must be unlocalized.
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auto parse_ctx = basic_format_parse_context<Char>({});
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auto format_ctx = context(out, {}, {});
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h.format(parse_ctx, format_ctx);
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return format_ctx.out();
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}
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};
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@ -4121,74 +4118,62 @@ FMT_END_EXPORT
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namespace detail {
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template <typename Char> struct format_handler {
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basic_format_parse_context<Char> parse_context;
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buffered_context<Char> context;
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void on_text(const Char* begin, const Char* end) {
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copy_noinline<Char>(begin, end, context.out());
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}
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FMT_CONSTEXPR auto on_arg_id() -> int { return parse_context.next_arg_id(); }
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FMT_CONSTEXPR auto on_arg_id(int id) -> int {
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parse_context.check_arg_id(id);
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return id;
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}
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FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
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parse_context.check_arg_id(id);
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int arg_id = context.arg_id(id);
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if (arg_id < 0) report_error("argument not found");
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return arg_id;
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}
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FMT_INLINE void on_replacement_field(int id, const Char*) {
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context.arg(id).visit(default_arg_formatter<Char>{context.out()});
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}
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auto on_format_specs(int id, const Char* begin, const Char* end)
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-> const Char* {
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auto arg = get_arg(context, id);
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// Not using a visitor for custom types gives better codegen.
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if (arg.format_custom(begin, parse_context, context))
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return parse_context.begin();
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auto specs = detail::dynamic_format_specs<Char>();
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begin = parse_format_specs(begin, end, specs, parse_context, arg.type());
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if (specs.width_ref.kind != detail::arg_id_kind::none)
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specs.width = detail::get_dynamic_spec(specs.width_ref, context);
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if (specs.precision_ref.kind != detail::arg_id_kind::none)
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specs.precision = detail::get_dynamic_spec(specs.precision_ref, context);
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if (begin == end || *begin != '}')
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report_error("missing '}' in format string");
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arg.visit(arg_formatter<Char>{context.out(), specs, context.locale()});
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return begin;
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}
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FMT_NORETURN void on_error(const char* message) { report_error(message); }
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};
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template <typename Char>
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void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
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typename vformat_args<Char>::type args, locale_ref loc) {
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auto out = basic_appender<Char>(buf);
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if (fmt.size() == 2 && equal2(fmt.data(), "{}")) {
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auto arg = args.get(0);
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if (!arg) report_error("argument not found");
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arg.visit(default_arg_formatter<Char>{out, args, loc});
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return;
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}
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struct format_handler {
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basic_format_parse_context<Char> parse_context;
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buffered_context<Char> context;
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format_handler(basic_appender<Char> p_out, basic_string_view<Char> str,
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basic_format_args<buffered_context<Char>> p_args,
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locale_ref p_loc)
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: parse_context(str), context(p_out, p_args, p_loc) {}
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void on_text(const Char* begin, const Char* end) {
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context.advance_to(copy_noinline<Char>(begin, end, context.out()));
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}
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FMT_CONSTEXPR auto on_arg_id() -> int {
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return parse_context.next_arg_id();
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}
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FMT_CONSTEXPR auto on_arg_id(int id) -> int {
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parse_context.check_arg_id(id);
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return id;
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}
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FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
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parse_context.check_arg_id(id);
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int arg_id = context.arg_id(id);
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if (arg_id < 0) report_error("argument not found");
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return arg_id;
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}
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FMT_INLINE void on_replacement_field(int id, const Char*) {
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auto arg = get_arg(context, id);
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context.advance_to(arg.visit(default_arg_formatter<Char>{
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context.out(), context.args(), context.locale()}));
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}
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auto on_format_specs(int id, const Char* begin, const Char* end)
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-> const Char* {
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auto arg = get_arg(context, id);
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// Not using a visitor for custom types gives better codegen.
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if (arg.format_custom(begin, parse_context, context))
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return parse_context.begin();
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auto specs = detail::dynamic_format_specs<Char>();
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begin = parse_format_specs(begin, end, specs, parse_context, arg.type());
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if (specs.width_ref.kind != detail::arg_id_kind::none)
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specs.width = detail::get_dynamic_spec(specs.width_ref, context);
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if (specs.precision_ref.kind != detail::arg_id_kind::none) {
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specs.precision =
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detail::get_dynamic_spec(specs.precision_ref, context);
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}
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if (begin == end || *begin != '}')
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report_error("missing '}' in format string");
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context.advance_to(arg.visit(
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arg_formatter<Char>{context.out(), specs, context.locale()}));
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return begin;
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}
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FMT_NORETURN void on_error(const char* message) { report_error(message); }
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};
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detail::parse_format_string<false>(fmt, format_handler(out, fmt, args, loc));
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if (fmt.size() == 2 && equal2(fmt.data(), "{}"))
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return args.get(0).visit(default_arg_formatter<Char>{out});
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parse_format_string<false>(
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fmt, format_handler<Char>{basic_format_parse_context<Char>(fmt),
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{out, args, loc}});
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}
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FMT_BEGIN_EXPORT
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@ -4215,9 +4200,9 @@ FMT_CONSTEXPR FMT_INLINE auto native_formatter<T, Char, TYPE>::format(
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specs_.precision_ref.kind == arg_id_kind::none) {
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return write<Char>(ctx.out(), val, specs_, ctx.locale());
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}
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auto specs = specs_;
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handle_dynamic_spec(specs.width, specs.width_ref, ctx);
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handle_dynamic_spec(specs.precision, specs.precision_ref, ctx);
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auto specs = format_specs(specs_);
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handle_dynamic_spec(specs.width, specs_.width_ref, ctx);
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handle_dynamic_spec(specs.precision, specs_.precision_ref, ctx);
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return write<Char>(ctx.out(), val, specs, ctx.locale());
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}
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