Use color for -ast-dump-filter only when it is supported

Patch by Philip Craig.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@168420 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Frontend/ASTConsumers.cpp

@@ -59,9 +59,12 @@ namespace {
 
     bool TraverseDecl(Decl *D) {
       if (D != NULL && filterMatches(D)) {
-        Out.changeColor(llvm::raw_ostream::BLUE) <<
-            (Dump ? "Dumping " : "Printing ") << getName(D) << ":\n";
-        Out.resetColor();
+        bool ShowColors = Out.has_colors();
+        if (ShowColors)
+          Out.changeColor(llvm::raw_ostream::BLUE);
+        Out << (Dump ? "Dumping " : "Printing ") << getName(D) << ":\n";
+        if (ShowColors)
+          Out.resetColor();
         if (Dump)
           D->dump(Out);
         else

test/Tooling/clang-check-ast-dump.cpp

@@ -8,7 +8,8 @@
 // RUN: clang-check -ast-dump -ast-dump-filter test_namespace::TheClass::theMethod "%s" -- 2>&1 | FileCheck -check-prefix CHECK-FILTER %s
 // CHECK-FILTER-NOT: namespace test_namespace
 // CHECK-FILTER-NOT: class TheClass
-// CHECK-FILTER: int theMethod(int x) (CompoundStmt
+// CHECK-FILTER: {{^}}Dumping test_namespace::TheClass::theMethod
+// CHECK-FILTER-NEXT: {{^}}int theMethod(int x) (CompoundStmt
 // CHECK-FILTER-NEXT:   (ReturnStmt
 // CHECK-FILTER-NEXT:     (BinaryOperator
 //