[cfe-commits] r166826 - in /cfe/trunk: lib/Parse/ParseDeclCXX.cpp test/SemaCXX/decltype.cpp

[Argyrios Kyrtzidis]

Author: akirtzidis
Date: Fri Oct 26 17:53:44 2012
New Revision: 166826

URL: http://llvm.org/viewvc/llvm-project?rev=166826&view=rev
Log:
In Parser::ParseDecltypeSpecifier, make sure the end location it returns
is at the end of parsed tokens when an error occurs, otherwise we'll hit
an assertion when trying to annotate the decltype tokens.

Modified:
    cfe/trunk/lib/Parse/ParseDeclCXX.cpp
    cfe/trunk/test/SemaCXX/decltype.cpp

Modified: cfe/trunk/lib/Parse/ParseDeclCXX.cpp
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Parse/ParseDeclCXX.cpp?rev=166826&r1=166825&r2=166826&view=diff
==============================================================================
--- cfe/trunk/lib/Parse/ParseDeclCXX.cpp (original)
+++ cfe/trunk/lib/Parse/ParseDeclCXX.cpp Fri Oct 26 17:53:44 2012
@@ -696,9 +696,22 @@
                                                  0, /*IsDecltype=*/true);
     Result = ParseExpression();
     if (Result.isInvalid()) {
-      SkipUntil(tok::r_paren);
       DS.SetTypeSpecError();
-      return StartLoc;
+      if (SkipUntil(tok::r_paren, /*StopAtSemi=*/true, /*DontConsume=*/true)) {
+        EndLoc = ConsumeParen();
+      } else {
+        assert(Tok.is(tok::semi));
+        if (PP.isBacktrackEnabled()) {
+          // Backtrack to get the location of the last token before the semi.
+          PP.RevertCachedTokens(2);
+          ConsumeToken(); // the semi.
+          EndLoc = ConsumeAnyToken();
+          assert(Tok.is(tok::semi));
+        } else {
+          EndLoc = Tok.getLocation();
+        }
+      }
+      return EndLoc;
     }
 
     // Match the ')'

Modified: cfe/trunk/test/SemaCXX/decltype.cpp
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/decltype.cpp?rev=166826&r1=166825&r2=166826&view=diff
==============================================================================
--- cfe/trunk/test/SemaCXX/decltype.cpp (original)
+++ cfe/trunk/test/SemaCXX/decltype.cpp Fri Oct 26 17:53:44 2012
@@ -1,5 +1,4 @@
 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
-// expected-no-diagnostics
 
 // PR5290
 int const f0();
@@ -29,3 +28,11 @@
   using U = S<int>;
   return S<int>(t);
 }
+
+struct B {
+  B(decltype(undeclared)); // expected-error {{undeclared identifier}}
+};
+struct C {
+  C(decltype(undeclared; // expected-error {{undeclared identifier}} \
+                         // expected-error {{expected ')'}} expected-note {{to 
match this '('}}
+};


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