mpusz/mp-units
1
0
Fork 1
mirror of https://github.com/mpusz/mp-units.git synced 2025-08-03 20:34:26 +02:00
Code Issues Packages Projects Releases Wiki Activity

Compile-time performance of printing a prefix improved

Browse Source
This commit is contained in:
Mateusz Pusz
2019-10-18 22:34:43 +02:00
parent 3c0c98f380
commit 880528e5ca
1 changed files with 9 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
src/include/units/format.h
View File

@@ -47,16 +47,17 @@ namespace units {
void print_prefix_or_ratio(std::basic_ostream<CharT, Traits>& os) void print_prefix_or_ratio(std::basic_ostream<CharT, Traits>& os)
{ {
if constexpr(Ratio::num != 1 || Ratio::den != 1) { if constexpr(Ratio::num != 1 || Ratio::den != 1) {
using prefix = downcast_target<detail::prefix_base<PrefixType, Ratio>>; if(!std::same_as<PrefixType, no_prefix>) {
using prefix = downcast_target<detail::prefix_base<PrefixType, Ratio>>;
if constexpr(!std::same_as<prefix, prefix_base<PrefixType, Ratio>>) { if constexpr(!std::same_as<prefix, prefix_base<PrefixType, Ratio>>) {
// print as a prefixed unit // print as a prefixed unit
os << prefix::symbol; os << prefix::symbol;
} return;
else { }
// print as a ratio of the coherent unit
print_ratio<Ratio>(os);
} }
// print as a ratio of the coherent unit
print_ratio<Ratio>(os);
} }
} }