template functions should not be simplified (#498)

internal/graph/graph.go

@@ -28,9 +28,10 @@ import (
 )
 
 var (
-	javaRegExp = regexp.MustCompile(`^(?:[a-z]\w*\.)*([A-Z][\w\$]*\.(?:<init>|[a-z][\w\$]*(?:\$\d+)?))(?:(?:\()|$)`)
-	goRegExp   = regexp.MustCompile(`^(?:[\w\-\.]+\/)+(.+)`)
-	cppRegExp  = regexp.MustCompile(`^(?:(?:\(anonymous namespace\)::)(\w+$))|(?:(?:\(anonymous namespace\)::)?(?:[_a-zA-Z]\w*\::|)*(_*[A-Z]\w*::~?[_a-zA-Z]\w*))`)
+	javaRegExp               = regexp.MustCompile(`^(?:[a-z]\w*\.)*([A-Z][\w\$]*\.(?:<init>|[a-z][\w\$]*(?:\$\d+)?))(?:(?:\()|$)`)
+	goRegExp                 = regexp.MustCompile(`^(?:[\w\-\.]+\/)+(.+)`)
+	cppRegExp                = regexp.MustCompile(`^(?:[_a-zA-Z]\w*::)+(_*[A-Z]\w*::~?[_a-zA-Z]\w*)`)
+	cppAnonymousPrefixRegExp = regexp.MustCompile(`^\(anonymous namespace\)::`)
 )
 
 // Graph summarizes a performance profile into a format that is
@@ -429,6 +430,7 @@ func newTree(prof *profile.Profile, o *Options) (g *Graph) {
 
 // ShortenFunctionName returns a shortened version of a function's name.
 func ShortenFunctionName(f string) string {
+	f = cppAnonymousPrefixRegExp.ReplaceAllString(f, "")
 	for _, re := range []*regexp.Regexp{goRegExp, javaRegExp, cppRegExp} {
 		if matches := re.FindStringSubmatch(f); len(matches) >= 2 {
 			return strings.Join(matches[1:], "")

internal/graph/graph_test.go

@@ -475,6 +475,10 @@ func TestShortenFunctionName(t *testing.T) {
 			"foo_bar::Foo::bar",
 			"Foo::bar",
 		},
+		{
+			"Foo::bar::baz<float, long, int>::operator()",
+			"Foo::bar::baz<float, long, int>::operator()",
+		},
 		{
 			"foo",
 			"foo",