[Lex] Allow to consume tokens while preprocessing
Summary:
By adding a hook to consume all tokens produced by the preprocessor.
The intention of this change is to make it possible to consume the
expanded tokens without re-runnig the preprocessor with minimal changes
to the preprocessor and minimal performance penalty when preprocessing
without recording the tokens.
The added hook is very low-level and reconstructing the expanded token
stream requires more work in the client code, the actual algorithm to
collect the tokens using this hook can be found in the follow-up change.
Reviewers: rsmith
Reviewed By: rsmith
Subscribers: eraman, nemanjai, kbarton, jsji, riccibruno, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D59885
llvm-svn: 361007
diff --git a/clang/lib/Lex/PPDirectives.cpp b/clang/lib/Lex/PPDirectives.cpp
index 19338865..90bba7e 100644
--- a/clang/lib/Lex/PPDirectives.cpp
+++ b/clang/lib/Lex/PPDirectives.cpp
@@ -1035,7 +1035,7 @@
// Enter this token stream so that we re-lex the tokens. Make sure to
// enable macro expansion, in case the token after the # is an identifier
// that is expanded.
- EnterTokenStream(std::move(Toks), 2, false);
+ EnterTokenStream(std::move(Toks), 2, false, /*IsReinject*/false);
return;
}
@@ -1518,7 +1518,7 @@
Tok[0].setLocation(Range.getBegin());
Tok[0].setAnnotationEndLoc(Range.getEnd());
Tok[0].setAnnotationValue(AnnotationVal);
- EnterTokenStream(std::move(Tok), 1, true);
+ EnterTokenStream(std::move(Tok), 1, true, /*IsReinject*/ false);
}
/// Produce a diagnostic informing the user that a #include or similar