Pattern Matching

auxiliary.go

@@ -507,7 +507,9 @@ func LoadFile(l *State, fileName, mode string) error {
 	if f != os.Stdin {
 		_ = f.Close()
 	}
-	if err != nil {
+	switch err {
+	case nil, SyntaxError, MemoryError: // do nothing
+	default:
 		l.SetTop(fileNameIndex)
 		return fileError("read")
 	}

auxiliary_test.go

@@ -0,0 +1,39 @@
+package lua
+
+import "testing"
+
+func TestLoadFileSyntaxError(t *testing.T) {
+	l := NewState()
+	err := LoadFile(l, "fixtures/syntax_error.lua", "")
+	if err != SyntaxError {
+		t.Error("didn't return SyntaxError on file with syntax error")
+	}
+	if l.Top() != 1 {
+		t.Error("didn't push anything to the stack")
+	}
+	if l.IsString(-1) != true {
+		t.Error("didn't push a string to the stack")
+	}
+	estr, _ := l.ToString(-1)
+	if estr != "fixtures/syntax_error.lua:4: syntax error near <eof>" {
+		t.Error("didn't push the correct error string")
+	}
+}
+
+func TestLoadStringSyntaxError(t *testing.T) {
+	l := NewState()
+	err := LoadString(l, "this_is_a_syntax_error")
+	if err != SyntaxError {
+		t.Error("didn't return SyntaxError on string with syntax error")
+	}
+	if l.Top() != 1 {
+		t.Error("didn't push anything to the stack")
+	}
+	if l.IsString(-1) != true {
+		t.Error("didn't push a string to the stack")
+	}
+	estr, _ := l.ToString(-1)
+	if estr != "[string \"this_is_a_syntax_error\"]:1: syntax error near <eof>" {
+		t.Error("didn't push the correct error string")
+	}
+}

fixtures/syntax_error.lua

@@ -0,0 +1,3 @@
+-- A file that should generate a syntax error
+
+this_is_a_syntax_error