fix: add code to handle and skip structs with "func" fields. (#616)

Co-authored-by: Eason Lin <easonlin404@gmail.com>

parser.go

@@ -1133,6 +1133,11 @@ func (parser *Parser) parseField(field *ast.Field) (*structField, error) {
 		}
 	}
 
+	// Skip func fields.
+	if prop.SchemaType == "func" {
+		return &structField{name: ""}, nil
+	}
+
 	structField := &structField{
 		name:       field.Names[0].Name,
 		schemaType: prop.SchemaType,

property.go

@@ -118,6 +118,11 @@ func getPropertyName(expr ast.Expr, parser *Parser) (propertyName, error) {
 	if _, ok := expr.(*ast.InterfaceType); ok { // if interface{}
 		return propertyName{SchemaType: "object", ArrayType: "object"}, nil
 	}
+
+	if _, ok := expr.(*ast.FuncType); ok { // if func()
+		return propertyName{SchemaType: "func", ArrayType: ""}, nil
+	}
+
 	return propertyName{}, errors.New("not supported" + fmt.Sprint(expr))
 }
 

schema.go

@@ -23,7 +23,7 @@ func IsSimplePrimitiveType(typeName string) bool {
 // IsPrimitiveType determine whether the type name is a primitive type
 func IsPrimitiveType(typeName string) bool {
 	switch typeName {
-	case "string", "number", "integer", "boolean", "array", "object":
+	case "string", "number", "integer", "boolean", "array", "object", "func":
 		return true
 	default:
 		return false

testdata/simple3/web/handler.go

@@ -31,6 +31,7 @@ type Pet struct {
 	Hidden    string `json:"-"`
 	UUID      uuid.UUID
 	Decimal   decimal.Decimal
+	Function  func()
 }
 
 type Tag struct {