Make sure parens/braces/brackets are correctly balanced.
In a line like:
(;
the semicolon leaves Parser:ParenCount unbalanced (it's 1 even though we stopped looking for a right paren).
This may affect later parsing and result in bad recovery for parsing errors.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106213 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/RAIIObjectsForParser.h b/lib/Parse/RAIIObjectsForParser.h
index 06bbbc2..addc795 100644
--- a/lib/Parse/RAIIObjectsForParser.h
+++ b/lib/Parse/RAIIObjectsForParser.h
@@ -80,6 +80,23 @@
}
};
+ /// \brief RAII object that makes sure paren/bracket/brace count is correct
+ /// after declaration/statement parsing, even when there's a parsing error.
+ class ParenBraceBracketBalancer {
+ Parser &P;
+ unsigned short ParenCount, BracketCount, BraceCount;
+ public:
+ ParenBraceBracketBalancer(Parser &p)
+ : P(p), ParenCount(p.ParenCount), BracketCount(p.BracketCount),
+ BraceCount(p.BraceCount) { }
+
+ ~ParenBraceBracketBalancer() {
+ P.ParenCount = ParenCount;
+ P.BracketCount = BracketCount;
+ P.BraceCount = BraceCount;
+ }
+ };
+
} // end namespace clang
#endif