1 files changed, 15 insertions, 0 deletions
diff --git a/lib/ast.js b/lib/ast.js
index 5ce591cc..a87e9c58 100644
--- a/lib/ast.js
+++ b/lib/ast.js
@@ -754,6 +754,17 @@ var AST_Const = DEFNODE("Const", null, {
     },
 }, AST_Definitions);
 
+var AST_Let = DEFNODE("Let", null, {
+    $documentation: "A `let` statement",
+    _validate: function() {
+        this.definitions.forEach(function(node) {
+            if (!(node instanceof AST_VarDef)) throw new Error("definitions must be AST_VarDef[]");
+            if (!(node.name instanceof AST_SymbolLet)) throw new Error("name must be AST_SymbolLet");
+            if (node.value != null) must_be_expression(node, "value");
+        });
+    },
+}, AST_Definitions);
+
 var AST_Var = DEFNODE("Var", null, {
     $documentation: "A `var` statement",
     _validate: function() {
@@ -1066,6 +1077,10 @@ var AST_SymbolConst = DEFNODE("SymbolConst", null, {
     $documentation: "Symbol defining a constant",
 }, AST_SymbolDeclaration);
 
+var AST_SymbolLet = DEFNODE("SymbolLet", null, {
+    $documentation: "Symbol defining a lexical-scoped variable",
+}, AST_SymbolDeclaration);
+
 var AST_SymbolVar = DEFNODE("SymbolVar", null, {
     $documentation: "Symbol defining a variable",
 }, AST_SymbolDeclaration);