mpusz/mp-units
1
0
Fork 1
mirror of https://github.com/mpusz/mp-units.git synced 2025-08-04 20:54:28 +02:00
Code Issues Packages Projects Releases Wiki Activity

Bug fixes

Browse Source
This commit is contained in:
rbrugo
2020-03-20 13:49:58 +01:00
committed by Mateusz Pusz
parent 5250afac57
commit 6c54d08b12
1 changed files with 50 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

92
src/include/units/format.h
View File

@@ -51,8 +51,8 @@ namespace units {
struct global_format_specs
{
CharT fill = '\0';
fmt::align_t align = fmt::align_t::right; // quantity values should behave like numbers (by default aligned to right)
int width = -1;
fmt::align_t align = fmt::align_t::none;
int width = 0;
};
// Holds specs about the representation (%[specs]Q)
@@ -106,7 +106,7 @@ namespace units {
handler.on_error("precision not allowed for integral quantity representation");
}
if(*begin != '}' && *begin != '%') {
if(begin != end && *begin != '}' && *begin != '%') {
handler.on_type(*begin++);
}
return begin;
@@ -167,7 +167,7 @@ namespace units {
}
// build the 'representation' as requested in the format string, applying only units-rep-modifiers
template<typename Rep, typename OutputIt, typename CharT>
template<typename CharT, typename Rep, typename OutputIt>
inline OutputIt format_units_quantity_value(OutputIt out, const Rep& val, const rep_format_specs& rep_specs)
{
fmt::basic_memory_buffer<CharT> buffer;
@@ -230,7 +230,7 @@ namespace units {
void on_quantity_value([[maybe_unused]] const CharT*, [[maybe_unused]] const CharT*)
{
out = format_units_quantity_value(out, val, global_specs, rep_specs);
out = format_units_quantity_value<CharT>(out, val, rep_specs);
}
void on_quantity_unit([[maybe_unused]] const CharT)
@@ -364,8 +364,9 @@ private:
// parse units-specific specification
end = units::detail::parse_units_format(begin, end, handler);
if((quantity_unit && !quantity_value) && (rep_specs.sign == fmt::sign::plus || rep_specs.sign == fmt::sign::minus))
handler.on_error("sign not allowed for a quantity unit");
if(global_specs.align == fmt::align_t::none && (!quantity_unit || quantity_value))
// quantity values should behave like numbers (by default aligned to right)
global_specs.align = fmt::align_t::right;
return {begin, end};
}
@@ -383,56 +384,63 @@ public:
{
auto begin = format_str.begin(), end = format_str.end();
// TODO Avoid extra copying if width is not specified
fmt::basic_memory_buffer<CharT> buf;
auto out = std::back_inserter(buf);
// process dynamic width and precision
fmt::internal::handle_dynamic_spec<fmt::internal::width_checker>(global_specs.width, width_ref, ctx);
fmt::internal::handle_dynamic_spec<fmt::internal::precision_checker>(rep_specs.precision, precision_ref, ctx);
// In `global_format_buffer` we will create a global format string
// e.g. "{:*^10%.1Q_%q}, 1.23q_m" => "{:*^10}"
fmt::basic_memory_buffer<CharT> global_format_buffer;
auto to_gfb = std::back_inserter(global_format_buffer);
format_to(to_gfb, "{{:");
if (auto fill = global_specs.fill; fill != '\0') {
format_to(to_gfb, "{}", fill);
}
if (auto align = global_specs.align; align != fmt::align_t::none) {
switch (align) {
case fmt::align_t::left:
format_to(to_gfb, "<");
break;
case fmt::align_t::right:
format_to(to_gfb, ">");
break;
case fmt::align_t::center:
format_to(to_gfb, "^");
break;
default:
break;
}
}
if (auto width = global_specs.width; width >= 1) {
format_to(to_gfb, "{}", width);
}
format_to(to_gfb, "}}");
// In `quantity_buffer` we will have the representation and the unit formatted according to their
// specification, ignoring global specifiers
// e.g. "{:*^10%.1Q_%q}, 1.23q_m" => "1.2_m"
// TODO Avoid extra copying if width is not specified
fmt::basic_memory_buffer<CharT> quantity_buffer;
auto to_quantity_buffer = std::back_inserter(quantity_buffer);
// deal with quantity content
if(begin == end || *begin == '}') {
// default format should print value followed by the unit separated with 1 space
out = units::detail::format_units_quantity_value(out, q.count(), global_specs, rep_specs);
to_quantity_buffer = units::detail::format_units_quantity_value<CharT>(to_quantity_buffer, q.count(), rep_specs);
constexpr auto symbol = units::detail::unit_text<Dimension, Unit>();
if(symbol.size()) {
*out++ = CharT(' ');
format_to(out, "{}", symbol.c_str());
*to_quantity_buffer++ = CharT(' ');
format_to(to_quantity_buffer, "{}", symbol.c_str());
}
return format_to(ctx.out(), fmt::to_string(buf));
}
else {
// user provided format
units::detail::units_formatter f(out, q, global_specs, rep_specs, unit_specs);
units::detail::units_formatter f(to_quantity_buffer, q, global_specs, rep_specs, unit_specs);
parse_units_format(begin, end, f);
fmt::basic_memory_buffer<CharT> outer;
auto to_outer = std::back_inserter(outer);
format_to(to_outer, "{{:");
if (auto fill = global_specs.fill; fill != '\0') {
format_to(to_outer, "{}", fill);
}
if (auto align = global_specs.align; align != fmt::align_t::none) {
switch (align) {
case fmt::align_t::left:
format_to(to_outer, "<");
break;
case fmt::align_t::right:
format_to(to_outer, ">");
break;
case fmt::align_t::center:
format_to(to_outer, "^");
break;
default:
break;
}
}
if (auto width = global_specs.width; width >= 0) {
format_to(to_outer, "{}", width);
}
format_to(to_outer, "}}");
return format_to(ctx.out(), fmt::to_string(outer), fmt::to_string(buf));
}
// Format the `quantity buffer` using specs from `global_format_buffer`
// In the example, equivalent to fmt::format("{:*^10}", "1.2_m")
return format_to(ctx.out(), fmt::to_string(global_format_buffer), fmt::to_string(quantity_buffer));
}
};