Add CXType support for FunctionNoProto and FunctionProto types.  This includes adding a new
function, clang_getResultType(), which returns the result type of the function type.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106459 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/c-index-test/c-index-test.c b/tools/c-index-test/c-index-test.c
index 4268cec..27c51a0 100644
--- a/tools/c-index-test/c-index-test.c
+++ b/tools/c-index-test/c-index-test.c
@@ -455,16 +455,29 @@
 
   if (!clang_isInvalid(clang_getCursorKind(cursor))) {
     CXType T = clang_getCursorType(cursor);
-    CXType CT = clang_getCanonicalType(T);
     CXString S = clang_getTypeKindSpelling(T.kind);
     PrintCursor(cursor);
     printf(" typekind=%s", clang_getCString(S));
-    if (!clang_equalTypes(T, CT)) {
-      CXString CS = clang_getTypeKindSpelling(CT.kind);
-      printf(" [canonical=%s]", clang_getCString(CS));
-      clang_disposeString(CS);
-    }
     clang_disposeString(S);
+    // Print the canonical type if it is different.
+    {
+      CXType CT = clang_getCanonicalType(T);
+      if (!clang_equalTypes(T, CT)) {
+        CXString CS = clang_getTypeKindSpelling(CT.kind);
+        printf(" [canonical=%s]", clang_getCString(CS));
+        clang_disposeString(CS);
+      }
+    }
+    // Print the return type if it exists.
+    {
+      CXType RT = clang_getResultType(T);
+      if (RT.kind != CXType_Invalid) {
+        CXString RS = clang_getTypeKindSpelling(RT.kind);
+        printf(" [result=%s]", clang_getCString(RS));
+        clang_disposeString(RS);
+      }
+    }
+
     printf("\n");
   }
   return CXChildVisit_Recurse;
diff --git a/tools/libclang/CXTypes.cpp b/tools/libclang/CXTypes.cpp
index ae756c7..64e49fb 100644
--- a/tools/libclang/CXTypes.cpp
+++ b/tools/libclang/CXTypes.cpp
@@ -77,6 +77,8 @@
     TKCASE(Typedef);
     TKCASE(ObjCInterface);
     TKCASE(ObjCObjectPointer);
+    TKCASE(FunctionNoProto);
+    TKCASE(FunctionProto);
     default:
       return CXType_Unexposed;
   }
@@ -118,7 +120,8 @@
       return MakeCXType(VD->getType(), AU);
     if (ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(D))
       return MakeCXType(PD->getType(), AU);
-
+    if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
+      return MakeCXType(FD->getType(), AU);
     return MakeCXType(QualType(), AU);
   }
 
@@ -246,6 +249,8 @@
     TKIND(Typedef);
     TKIND(ObjCInterface);
     TKIND(ObjCObjectPointer);
+    TKIND(FunctionNoProto);
+    TKIND(FunctionProto);
   }
 #undef TKIND
   return cxstring::createCXString(s);
@@ -255,4 +260,15 @@
   return A.data[0] == B.data[0] && A.data[1] == B.data[1];;
 }
 
+CXType clang_getResultType(CXType X) {
+  QualType T = GetQualType(X);
+  if (!T.getTypePtr())
+    return MakeCXType(QualType(), GetASTU(X));
+  
+  if (const FunctionType *FD = T->getAs<FunctionType>())
+    return MakeCXType(FD->getResultType(), GetASTU(X));
+  
+  return MakeCXType(QualType(), GetASTU(X));
+}
+
 } // end: extern "C"
diff --git a/tools/libclang/libclang.darwin.exports b/tools/libclang/libclang.darwin.exports
index 3ef3b74..6c7eddf 100644
--- a/tools/libclang/libclang.darwin.exports
+++ b/tools/libclang/libclang.darwin.exports
@@ -67,6 +67,7 @@
 _clang_getRange
 _clang_getRangeEnd
 _clang_getRangeStart
+_clang_getResultType
 _clang_getTokenExtent
 _clang_getTokenKind
 _clang_getTokenLocation
diff --git a/tools/libclang/libclang.exports b/tools/libclang/libclang.exports
index c7831f7..138b976 100644
--- a/tools/libclang/libclang.exports
+++ b/tools/libclang/libclang.exports
@@ -67,6 +67,7 @@
 clang_getRange
 clang_getRangeEnd
 clang_getRangeStart
+clang_getResultType
 clang_getTokenExtent
 clang_getTokenKind
 clang_getTokenLocation