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Streamline default FP formatting

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This commit is contained in:
Victor Zverovich 2020-06-20 07:12:50 -07:00
parent 0b3a83f7f4
commit 5ddf9ee1bd
1 changed files with 26 additions and 1 deletions
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27
include/fmt/format.h
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@ -1611,7 +1611,7 @@ OutputIt write_nonfinite(OutputIt out, bool isinf,
template <typename Char, typename OutputIt, typename T, template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_floating_point<T>::value)> FMT_ENABLE_IF(std::is_floating_point<T>::value)>
OutputIt write(OutputIt out, T value, basic_format_specs<Char> specs = {}, OutputIt write(OutputIt out, T value, basic_format_specs<Char> specs,
locale_ref loc = {}) { locale_ref loc = {}) {
if (const_check(!is_supported_floating_point(value))) return out; if (const_check(!is_supported_floating_point(value))) return out;
float_specs fspecs = parse_float_type_spec(specs); float_specs fspecs = parse_float_type_spec(specs);
@ -1658,6 +1658,31 @@ OutputIt write(OutputIt out, T value, basic_format_specs<Char> specs = {},
return write_padded<align::right>(out, specs, w.size(), w); return write_padded<align::right>(out, specs, w.size(), w);
} }
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_floating_point<T>::value)>
OutputIt write(OutputIt out, T value) {
if (const_check(!is_supported_floating_point(value))) return out;
auto fspecs = float_specs();
if (std::signbit(value)) { // value < 0 is false for NaN so use signbit.
fspecs.sign = sign::minus;
value = -value;
}
auto specs = basic_format_specs<Char>();
if (!std::isfinite(value))
return write_nonfinite(out, std::isinf(value), specs, fspecs);
memory_buffer buffer;
int precision = -1;
if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
fspecs.use_grisu = use_grisu<T>();
int exp = format_float(promote_float(value), precision, fspecs, buffer);
fspecs.precision = precision;
float_writer<Char> w(buffer.data(), static_cast<int>(buffer.size()), exp,
fspecs, static_cast<Char>('.'));
return base_iterator(out, w(reserve(out, w.size())));
}
template <typename Char, typename OutputIt> template <typename Char, typename OutputIt>
OutputIt write_char(OutputIt out, Char value, OutputIt write_char(OutputIt out, Char value,
const basic_format_specs<Char>& specs) { const basic_format_specs<Char>& specs) {