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-rw-r--r--lib/Parse/ParseStmt.cpp31
-rw-r--r--test/Parser/recovery-2.c8
-rw-r--r--test/Parser/recovery-3.c32
3 files changed, 54 insertions, 17 deletions
diff --git a/lib/Parse/ParseStmt.cpp b/lib/Parse/ParseStmt.cpp
index bde4a50217..263079f138 100644
--- a/lib/Parse/ParseStmt.cpp
+++ b/lib/Parse/ParseStmt.cpp
@@ -448,20 +448,28 @@ Parser::OwningStmtResult Parser::ParseIfStatement() {
ParseScope IfScope(this, Scope::DeclScope | Scope::ControlScope, C99orCXX);
// Parse the condition.
+ SourceLocation LParenLoc = ConsumeParen();
+
OwningExprResult CondExp(Actions);
- if (getLang().CPlusPlus) {
- SourceLocation LParenLoc = ConsumeParen();
+ if (getLang().CPlusPlus)
CondExp = ParseCXXCondition();
- MatchRHSPunctuation(tok::r_paren, LParenLoc);
- } else {
- CondExp = ParseSimpleParenExpression();
- }
-
- if (CondExp.isInvalid()) {
+ else
+ CondExp = ParseExpression();
+
+ // If the parser was confused by the condition and we don't have a ')', try to
+ // recover by skipping ahead to a semi and bailing out. If condexp is
+ // semantically invalid but we have well formed code, keep going.
+ if (CondExp.isInvalid() && Tok.isNot(tok::r_paren)) {
SkipUntil(tok::semi);
- return StmtError();
+ // Skipping may have stopped if it found the containing ')'. If so, we can
+ // continue parsing the if statement.
+ if (Tok.isNot(tok::r_paren))
+ return StmtError();
}
+ // Otherwise the condition is valid or the rparen is present.
+ MatchRHSPunctuation(tok::r_paren, LParenLoc);
+
// C99 6.8.4p3 - In C99, the body of the if statement is a scope, even if
// there is no compound stmt. C90 does not have this clause. We only do this
// if the body isn't a compound statement to avoid push/pop in common cases.
@@ -521,6 +529,11 @@ Parser::OwningStmtResult Parser::ParseIfStatement() {
}
IfScope.Exit();
+
+ // If the condition was invalid, discard the if statement. We could recover
+ // better by replacing it with a valid expr, but don't do that yet.
+ if (CondExp.isInvalid())
+ return StmtError();
// If the then or else stmt is invalid and the other is valid (and present),
// make turn the invalid one into a null stmt to avoid dropping the other
diff --git a/test/Parser/recovery-2.c b/test/Parser/recovery-2.c
deleted file mode 100644
index 4451232dca..0000000000
--- a/test/Parser/recovery-2.c
+++ /dev/null
@@ -1,8 +0,0 @@
-// RUN: clang -fsyntax-only -verify -pedantic %s
-
-
-// PR2241
-float f[] = {
- 1e, // expected-error {{exponent}}
- 1ee0 // expected-error {{exponent}}
-};
diff --git a/test/Parser/recovery-3.c b/test/Parser/recovery-3.c
index 955d728827..0c8206fe28 100644
--- a/test/Parser/recovery-3.c
+++ b/test/Parser/recovery-3.c
@@ -1,5 +1,12 @@
// RUN: clang -fsyntax-only -verify -pedantic %s
+// PR2241
+float test2241[] = {
+ 1e, // expected-error {{exponent}}
+ 1ee0 // expected-error {{exponent}}
+};
+
+
// Testcase derived from PR2692
static char *f (char * (*g) (char **, int), char **p, ...) {
char *s;
@@ -12,3 +19,28 @@ static char *f (char * (*g) (char **, int), char **p, ...) {
} // expected-error {{expected external declaration}}
+// rdar://6094870
+int test(int) {
+ struct { int i; } x;
+
+ if (x.hello) // expected-error {{no member named 'hello'}}
+ test(0);
+ else
+ ;
+
+ if (x.hello == 0) // expected-error {{no member named 'hello'}}
+ test(0);
+ else
+ ;
+
+ if ((x.hello == 0)) // expected-error {{no member named 'hello'}}
+ test(0);
+ else
+ ;
+
+ if (x.i == 0)) // expected-error {{expected expression}}
+ test(0);
+ else
+ ;
+}
+