genbindings: use state machine tokenization for template parameters

cmd/genbindings/clang2il.go

@@ -437,7 +437,7 @@ func parseTypeString(typeString string) (CppParameter, []CppParameter, error) {
 	}
 
 	// Parameters are separated by commas and nesting can not be possible
-	params := strings.Split(inner, `,`)
+	params := tokenizeMultipleParameters(inner) // strings.Split(inner, `,`)
 
 	ret := make([]CppParameter, 0, len(params))
 	for _, p := range params {
@@ -456,6 +456,31 @@ func parseTypeString(typeString string) (CppParameter, []CppParameter, error) {
 	return returnType, ret, nil
 }
 
+func tokenizeMultipleParameters(p string) []string {
+	// Tokenize into top-level strings
+	templateDepth := 0
+	tokens := []string{}
+	wip := ""
+	p = strings.TrimSpace(p)
+	for _, c := range p {
+		if c == '<' {
+			wip += string(c)
+			templateDepth++
+		} else if c == '>' {
+			wip += string(c)
+			templateDepth--
+		} else if c == ',' && templateDepth == 0 {
+			tokens = append(tokens, wip)
+			wip = ""
+		} else {
+			wip += string(c)
+		}
+	}
+
+	tokens = append(tokens, wip)
+	return tokens
+}
+
 func parseSingleTypeString(p string) CppParameter {
 
 	tokens := strings.Split(strings.TrimSpace(p), " ")

cmd/genbindings/clang2il_test.go

@@ -10,6 +10,7 @@ func TestParseTypeString(t *testing.T) {
 		input        string
 		expectReturn CppParameter
 		expectParams []CppParameter
+		expectErr    bool
 	}
 
 	cases := []testCase{
@@ -20,20 +21,40 @@ func TestParseTypeString(t *testing.T) {
 				CppParameter{ParameterType: "bool"},
 			},
 		},
+		testCase{
+			input: "bool (QList<QPair<Foo, Bar>>, QString)",
+			/*
+				expectReturn: CppParameter{ParameterType: "bool"},
+				expectParams: []CppParameter{
+					CppParameter{ParameterType: "QList<QPair<Foo, Bar>>"},
+					CppParameter{ParameterType: "QString"},
+				},
+			*/
+			expectErr: true,
+		},
 	}
 
 	for _, tc := range cases {
 		r, p, err := parseTypeString(tc.input)
-		if err != nil {
-			t.Errorf("Test %q got error %v", tc.input, err)
-			continue
-		}
 
-		if !reflect.DeepEqual(r, tc.expectReturn) {
-			t.Errorf("Test %q got return=%#v, expected=%#v", tc.input, r, tc.expectReturn)
-		}
-		if !reflect.DeepEqual(p, tc.expectParams) {
-			t.Errorf("Test %q got return=%#v, expected=%#v", tc.input, r, tc.expectReturn)
+		if tc.expectErr {
+			if err == nil {
+				t.Errorf("Test %q got error=nil but it was expected to fail", tc.input)
+				continue
+			}
+
+		} else {
+			if err != nil {
+				t.Errorf("Test %q got error %v", tc.input, err)
+				continue
+			}
+
+			if !reflect.DeepEqual(r, tc.expectReturn) {
+				t.Errorf("Test %q\n-got return=%#v\n-expected  =%#v", tc.input, r, tc.expectReturn)
+			}
+			if !reflect.DeepEqual(p, tc.expectParams) {
+				t.Errorf("Test %q\n-got params=%#v\n-expected  =%#v", tc.input, p, tc.expectParams)
+			}
 		}
 	}
 }