111

Author: lvan100

lib/tidl/parser.go

@@ -111,6 +111,10 @@ func ParseMeta(data []byte) (*MetaInfo, error) {
 
 // Parse runs the parsing pipeline for a single IDL input.
 func Parse(data []byte) (doc Document, err error) {
+	if data = bytes.TrimSpace(data); len(data) == 0 {
+		return Document{}, nil
+	}
+
 	e := &ErrorListener{
 		Scanner: bufio.NewScanner(bytes.NewReader(data)),
 	}

lib/vidl/parser.go

@@ -108,6 +108,10 @@ func (e InnerExpr) Text() string {
 
 // Parse parses the input string and returns an Expr AST.
 func Parse(data string) (expr Expr, err error) {
+	if data = strings.TrimSpace(data); data == "" {
+		return nil, nil
+	}
+
 	e := &ErrorListener{Data: data}
 
 	// Recover from parser panics to provide better error reporting
@@ -132,7 +136,6 @@ func Parse(data string) (expr Expr, err error) {
 	p := NewVParser(tokens)
 	p.RemoveErrorListeners()
 	p.AddErrorListener(e)
-	p.GetInterpreter().SetPredictionMode(antlr.PredictionModeSLL) // Use faster SLL mode
 
 	// Step 3: Walk parse tree with custom listener
 	l := &ParseTreeListener{

lib/vidl/parser_test.go

@@ -287,11 +287,6 @@ func TestParse(t *testing.T) {
 			input:       "a + b",
 			expectError: errors.New("line 1:2 token recognition error at: '+ ' << text: \"a + b\""),
 		},
-		{
-			name:        "syntax_error_empty",
-			input:       "",
-			expectError: errors.New("line 1:0 mismatched input '<EOF>' expecting {'$', 'nil', '!', '(', STRING, INTEGER, FLOAT, IDENTIFIER} << text: \"\""),
-		},
 		{
 			name:        "syntax_error_missing_comma_in_function",
 			input:       "func(a b)",