================
@@ -862,8 +862,17 @@ SourceLocation Lexer::getLocForEndOfToken(SourceLocation
Loc, unsigned Offset,
return {};
if (Loc.isMacroID()) {
----------------
luoliwoshang wrote:
Thanks for the question. The reason this is in the `isMacroID()` branch is that
`isMacroID()` only checks `MacroIDBit`; it does not distinguish how that bit
was produced.
In this testcase there is no user macro, but `>>` is split during template
parsing via `PP.SplitToken`. After that, the location goes through
`createTokenSplitLoc -> createExpansionLocImpl -> getMacroLoc`, so the location
carries `MacroIDBit` and naturally enters the `isMacroID()` path.
https://github.com/llvm/llvm-project/pull/184555
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