parser: return error, we might need it

parser/parser.go

@@ -24,7 +24,7 @@ func New(src []byte) *Parser {
 }
 
 // Parse returns the fully parsed source and returns the abstract syntax tree.
-func (p *Parser) Parse() Node {
+func (p *Parser) Parse() (Node, error) {
 	defer un(trace(p, "ParseSource"))
 	node := &Source{}
 
@@ -39,7 +39,7 @@ func (p *Parser) Parse() Node {
 		}
 	}
 
-	return node
+	return node, nil
 }
 
 func (p *Parser) parseStatement() Node {

parser/parser_test.go

@@ -6,7 +6,10 @@ func TestAssignStatment(t *testing.T) {
 	src := `ami = "${var.foo}"`
 	p := New([]byte(src))
 	p.enableTrace = true
-	n := p.Parse()
+	n, err := p.Parse()
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	if n.String() != src {
 		t.Errorf("AssignStatement is not parsed correctly\n\twant: '%s'\n\tgot : '%s'", src, n.String())