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Move format_handler to detail

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This commit is contained in:
Victor Zverovich 2020-06-06 06:38:48 -07:00
parent 795b47a7b5
commit d9e3d6e6ed
1 changed files with 57 additions and 57 deletions
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114
include/fmt/format.h
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@ -2544,6 +2544,62 @@ FMT_CONSTEXPR const typename ParseContext::char_type* parse_format_specs(
return f.parse(ctx);
}
template <typename ArgFormatter, typename Char, typename Context>
struct format_handler : detail::error_handler {
using iterator = typename ArgFormatter::iterator;
format_handler(iterator out, basic_string_view<Char> str,
basic_format_args<Context> format_args, detail::locale_ref loc)
: parse_context(str), context(out, format_args, loc) {}
void on_text(const Char* begin, const Char* end) {
auto size = detail::to_unsigned(end - begin);
auto out = context.out();
auto&& it = detail::reserve(out, size);
it = std::copy_n(begin, size, it);
context.advance_to(out);
}
template <typename ID> void get_arg(ID id) {
arg = detail::get_arg(context, id);
}
void on_arg_id() { get_arg(parse_context.next_arg_id()); }
void on_arg_id(int id) {
parse_context.check_arg_id(id);
get_arg(id);
}
void on_arg_id(basic_string_view<Char> id) { get_arg(id); }
void on_replacement_field(const Char* p) {
advance_to(parse_context, p);
context.advance_to(
visit_format_arg(ArgFormatter(context, &parse_context), arg));
}
const Char* on_format_specs(const Char* begin, const Char* end) {
advance_to(parse_context, begin);
detail::custom_formatter<Context> f(parse_context, context);
if (visit_format_arg(f, arg)) return parse_context.begin();
basic_format_specs<Char> specs;
using detail::specs_handler;
using parse_context_t = basic_format_parse_context<Char>;
detail::specs_checker<specs_handler<parse_context_t, Context>> handler(
specs_handler<parse_context_t, Context>(specs, parse_context, context),
arg.type());
begin = parse_format_specs(begin, end, handler);
if (begin == end || *begin != '}') on_error("missing '}' in format string");
advance_to(parse_context, begin);
context.advance_to(
visit_format_arg(ArgFormatter(context, &parse_context, &specs), arg));
return begin;
}
basic_format_parse_context<Char> parse_context;
Context context;
basic_format_arg<Context> arg;
};
// A parse context with extra argument id checks. It is only used at compile
// time because adding checks at runtime would introduce substantial overhead
// and would be redundant since argument ids are checked when arguments are
@ -3081,69 +3137,13 @@ FMT_CONSTEXPR void advance_to(
ctx.advance_to(ctx.begin() + (p - &*ctx.begin()));
}
template <typename ArgFormatter, typename Char, typename Context>
struct format_handler : detail::error_handler {
using iterator = typename ArgFormatter::iterator;
format_handler(iterator out, basic_string_view<Char> str,
basic_format_args<Context> format_args, detail::locale_ref loc)
: parse_context(str), context(out, format_args, loc) {}
void on_text(const Char* begin, const Char* end) {
auto size = detail::to_unsigned(end - begin);
auto out = context.out();
auto&& it = detail::reserve(out, size);
it = std::copy_n(begin, size, it);
context.advance_to(out);
}
template <typename ID> void get_arg(ID id) {
arg = detail::get_arg(context, id);
}
void on_arg_id() { get_arg(parse_context.next_arg_id()); }
void on_arg_id(int id) {
parse_context.check_arg_id(id);
get_arg(id);
}
void on_arg_id(basic_string_view<Char> id) { get_arg(id); }
void on_replacement_field(const Char* p) {
advance_to(parse_context, p);
context.advance_to(
visit_format_arg(ArgFormatter(context, &parse_context), arg));
}
const Char* on_format_specs(const Char* begin, const Char* end) {
advance_to(parse_context, begin);
detail::custom_formatter<Context> f(parse_context, context);
if (visit_format_arg(f, arg)) return parse_context.begin();
basic_format_specs<Char> specs;
using detail::specs_handler;
using parse_context_t = basic_format_parse_context<Char>;
detail::specs_checker<specs_handler<parse_context_t, Context>> handler(
specs_handler<parse_context_t, Context>(specs, parse_context, context),
arg.type());
begin = parse_format_specs(begin, end, handler);
if (begin == end || *begin != '}') on_error("missing '}' in format string");
advance_to(parse_context, begin);
context.advance_to(
visit_format_arg(ArgFormatter(context, &parse_context, &specs), arg));
return begin;
}
basic_format_parse_context<Char> parse_context;
Context context;
basic_format_arg<Context> arg;
};
/** Formats arguments and writes the output to the range. */
template <typename ArgFormatter, typename Char, typename Context>
typename Context::iterator vformat_to(
typename ArgFormatter::iterator out, basic_string_view<Char> format_str,
basic_format_args<Context> args,
detail::locale_ref loc = detail::locale_ref()) {
format_handler<ArgFormatter, Char, Context> h(out, format_str, args, loc);
detail::format_handler<ArgFormatter, Char, Context> h(out, format_str, args, loc);
if (format_str.size() == 2 && detail::equal2(format_str.data(), "{}")) {
auto arg = detail::get_arg(h.context, 0);
h.parse_context.advance_to(&format_str[1]);