Implement the first set of changes for PR3963 and rdar://6759604,

which tries to do better error recovery when it is "obvious" that an
identifier is a mis-typed typename.  In this case, we try to parse
it as a typename instead of as the identifier in a declarator, which
gives us several options for better error recovery and immediately
makes diagnostics more useful.  For example, we now produce:

t.c:4:8: error: unknown type name 'foo_t'
static foo_t a = 4;
       ^

instead of:

t.c:4:14: error: invalid token after top level declarator
static foo_t a = 4;
             ^

Also, since we now parse "a" correctly, we make a decl for it,
preventing later uses of 'a' from emitting things like:

t.c:12:20: error: use of undeclared identifier 'a'
int bar() { return a + b; }
                   ^

I'd really appreciate any scrutiny possible on this, it 
is a tricky area.

llvm-svn: 68911

1 files changed, 4 insertions, 6 deletions

diff --git a/clang/test/Parser/objc-foreach-syntax.m b/clang/test/Parser/objc-foreach-syntax.m
index e6e3ccf12d1..977dccc88b1 100644
--- a/clang/test/Parser/objc-foreach-syntax.m
+++ b/clang/test/Parser/objc-foreach-syntax.m
@@ -1,10 +1,8 @@
 // RUN: clang-cc -fsyntax-only -verify %s
 
-ce MyList // expected-error {{invalid token after top level declarator}}
-@end
 
 
-@implementation MyList
+@implementation MyList // expected-warning {{cannot find interface declaration for 'MyList'}}
 - (unsigned int)countByEnumeratingWithState:  (struct __objcFastEnumerationState *)state objects:  (id *)items count:(unsigned int)stackcount
 {
      return 0;
@@ -14,10 +12,10 @@ ce MyList // expected-error {{invalid token after top level declarator}}
 
 int LOOP();
 
-@implementation MyList (BasicTest)  // expected-error {{cannot find interface declaration for 'MyList'}}
+@implementation MyList (BasicTest) 
 - (void)compilerTestAgainst {
-MyList * el;  // expected-error {{use of undeclared identifier 'MyList'}}
-     for (el in @"foo")    // expected-error {{use of undeclared identifier 'el'}}
+MyList * el; 
+     for (el in @"foo") 
 	  { LOOP(); }
 }
 @end