arrays and array indexes

1 files changed, 20 insertions, 0 deletions

diff --git a/ast/ast.go b/ast/ast.go
index 9473f1a..cc30808 100644
--- a/ast/ast.go
+++ b/ast/ast.go
@@ -329,3 +329,23 @@ func (al *ArrayLiteral) String() string {
 
 	return out.String()
 }
+
+type IndexExpression struct {
+	Token tokens.Token // the '[' token
+	Left  Expression
+	Index Expression
+}
+
+func (ie *IndexExpression) expressionNode()      {}
+func (ie *IndexExpression) TokenLiteral() string { return ie.Token.Literal }
+func (ie *IndexExpression) String() string {
+	var out bytes.Buffer
+
+	out.WriteString("(")
+	out.WriteString(ie.Left.String())
+	out.WriteString("[")
+	out.WriteString(ie.Index.String())
+	out.WriteString("])")
+
+	return out.String()
+}