Improve identification of c-style casts.

A ")" before any of "=", "{" or ";" won't be a cast. This fixes issues
with the formatting of unnamed parameters.

Before: void f(int *){}
After:  void f(int *) {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172349 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Format/Format.cpp

@@ -976,7 +976,11 @@ private:
           Current.Type = TT_BlockComment;
       } else if (Current.is(tok::r_paren) &&
                  (Current.Parent->Type == TT_PointerOrReference ||
-                  Current.Parent->Type == TT_TemplateCloser)) {
+                  Current.Parent->Type == TT_TemplateCloser) &&
+                 (Current.Children.empty() ||
+                  (Current.Children[0].isNot(tok::equal) &&
+                   Current.Children[0].isNot(tok::semi) &&
+                   Current.Children[0].isNot(tok::l_brace)))) {
         // FIXME: We need to get smarter and understand more cases of casts.
         Current.Type = TT_CastRParen;
       } else if (Current.is(tok::at) && Current.Children.size()) {

unittests/Format/FormatTest.cpp

@@ -1045,9 +1045,6 @@ TEST_F(FormatTest, UnderstandsUsesOfStarAndAmp) {
   verifyFormat("A<int **> a;");
   verifyFormat("A<int *, int *> a;");
   verifyFormat("A<int **, int **> a;");
-  verifyFormat("Type *A = static_cast<Type *>(P);");
-  verifyFormat("Type *A = (Type *)P;");
-  verifyFormat("Type *A = (vector<Type *, int *>)P;");
 
   verifyFormat(
       "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
@@ -1062,6 +1059,25 @@ TEST_F(FormatTest, UnderstandsUsesOfStarAndAmp) {
   verifyGoogleFormat("int a = b ? *c : *d;");
 }
 
+TEST_F(FormatTest, FormatsCasts) {
+  verifyFormat("Type *A = static_cast<Type *>(P);");
+  verifyFormat("Type *A = (Type *)P;");
+  verifyFormat("Type *A = (vector<Type *, int *>)P;");
+  verifyFormat("int a = (int)(2.0f);");
+
+  // FIXME: These also need to be identified.
+  verifyFormat("int a = (int) 2.0f;");
+  verifyFormat("int a = (int) * b;");
+
+  // These are not casts.
+  verifyFormat("void f(int *) {}");
+  verifyFormat("void f(int *);");
+  verifyFormat("void f(int *) = 0;");
+  verifyFormat("void f(SmallVector<int>) {}");
+  verifyFormat("void f(SmallVector<int>);");
+  verifyFormat("void f(SmallVector<int>) = 0;");
+}
+
 TEST_F(FormatTest, FormatsFunctionTypes) {
   // FIXME: Determine the cases that need a space after the return type and fix.
   verifyFormat("A<bool()> a;");