142   FmtReplacement repl;  in parseFormatString()  local
144     std::tie(repl, fmt) = splitFmtSegment(fmt);  in parseFormatString()
145     if (repl.type != FmtReplacement::Type::Empty)  in parseFormatString()
146       replacements.push_back(repl);  in parseFormatString()
152   for (auto &repl : replacements) {  in format()  local
153     if (repl.type == FmtReplacement::Type::Empty)  in format()
156     if (repl.type == FmtReplacement::Type::Literal) {  in format()
157       s << repl.spec;  in format()
161     if (repl.type == FmtReplacement::Type::SpecialPH) {  in format()
162       if (repl.placeholder == FmtContext::PHKind::None) {  in format()
163         s << repl.spec;  in format()
166         s << repl.spec << kMarkerForNoSubst;  in format()
169         if (repl.placeholder == FmtContext::PHKind::Custom) {  in format()
171           subst = context->getSubstFor(repl.spec.substr(1));  in format()
173           subst = context->getSubstFor(repl.placeholder);  in format()
178           s << repl.spec << kMarkerForNoSubst;  in format()
183     if (repl.type == FmtReplacement::Type::PositionalRangePH) {  in format()
184       if (repl.index >= adapters.size()) {  in format()
185         s << repl.spec << kMarkerForNoSubst;  in format()
189       range = range.drop_front(repl.index);  in format()
190       if (repl.end != FmtReplacement::kUnset)  in format()
191         range = range.drop_back(adapters.size() - repl.end);  in format()
197     assert(repl.type == FmtReplacement::Type::PositionalPH);  in format()
199     if (repl.index >= adapters.size()) {  in format()
200       s << repl.spec << kMarkerForNoSubst;  in format()
203     adapters[repl.index]->format(s, /*Options=*/"");  in format()