Parser::cps_key Parser::get_decomposition_mapping (const Item & item) {
auto & str=item.Get();
if (
(str.size()==0) ||
(str[0]=='<')
) return cps.Add();
auto dcm=item.CodePoints();
if (!dcm) throw std::runtime_error("Bad decomposition mapping in UnicodeData.txt");
return cps.Add(std::move(*dcm));
}
static std::optional<CodePoint::Type> get_simple_case_mapping (const Item & i) {
auto mapping=i.CodePoints();
if (!mapping) bad_case_mapping();
switch (mapping->size()) {
case 0:
return std::optional<CodePoint::Type>{};
case 1:
return (*mapping)[0];
default:
bad_case_mapping();
}
}
void CasingParser::get_folding (Entry & entry, const Item & item, bool turkic) {
// Get the code points
auto mapping=item.CodePoints();
if (!mapping) throw std::runtime_error("Expected code points");
if (turkic) {
auto mapping_key=cps.Add(std::move(*mapping));
casings.Add(
entry.Folding,
Casing{
get_tr(),
mapping_key
}
);
casings.Add(
entry.Folding,
Casing{
get_az(),
mapping_key
}
);
} else {
add_casing(
entry.Folding,
std::optional<conds_key>{},
std::move(*mapping)
);
}
}