43     SmallVector<StringRef, 4> Parts;  in read()  local
44     Line.split(Parts, ' ', /*MaxSplits*/-1, /*KeepEmpty*/false);  in read()
46     if (Parts.size() != 3)  in read()
51     std::optional<FK> FragmentKind = StringSwitch<std::optional<FK>>(Parts[0])  in read()
58                          " found '" + Parts[0] + "'");  in read()
61     switch (Canonicalizer.addEquivalence(*FragmentKind, Parts[1], Parts[2])) {  in read()
66       return ReportError("Manglings '" + Parts[1] + "' and '" + Parts[2] + "' "  in read()
71       return ReportError("Could not demangle '" + Parts[1] + "' "  in read()
72                          "as a <" + Parts[0] + ">; invalid mangling?");  in read()
75       return ReportError("Could not demangle '" + Parts[2] + "' "  in read()
76                          "as a <" + Parts[0] + ">; invalid mangling?");  in read()