[ESNext] Implement DynamicImportCall

src/ast/ast.h

Index: src/ast/ast.h
diff --git a/src/ast/ast.h b/src/ast/ast.h
index 3705b2d8404af47c1b027e28d665adebfac2d121..faaaa70955cd4d9ea0044f63f724b51a984fda45 100644
--- a/src/ast/ast.h
+++ b/src/ast/ast.h
@@ -105,7 +105,8 @@ namespace internal {
   V(EmptyParentheses)           \
   V(GetIterator)                \
   V(DoExpression)               \
-  V(RewritableExpression)
+  V(RewritableExpression)       \
+  V(ImportCallExpression)
 
 #define AST_NODE_LIST(V)                        \
   DECLARATION_NODE_LIST(V)                      \
@@ -2921,6 +2922,19 @@ class SuperCallReference final : public Expression {
   VariableProxy* this_function_var_;
 };
 
+class ImportCallExpression final : public Expression {

[adamk, 2017/03/15 21:36:43]

Please add a comment for this.

[gsathya, 2017/03/16 00:59:24]

Feel free to suggest something more comprehensive. 

+ public:
+  Expression* arg() const { return arg_; }

[adamk, 2017/03/15 21:36:43]

Please use a full word here, "argument". Same for the member and the other uses
within this class.

[gsathya, 2017/03/16 00:59:24]

Done.

+  void set_arg(Expression* arg) { arg_ = arg; }
+
+ private:
+  friend class AstNodeFactory;
+
+  ImportCallExpression(Expression* arg, int pos)
+      : Expression(pos, kImportCallExpression), arg_(arg) {}
+
+  Expression* arg_;
+};
 
 // This class is produced when parsing the () in arrow functions without any
 // arguments and is not actually a valid expression.
@@ -3569,6 +3583,10 @@ class AstNodeFactory final BASE_EMBEDDED {
     return new (zone_) GetIterator(iterable, hint, pos);
   }
 
+  ImportCallExpression* NewImportCallExpression(Expression* args, int pos) {
+    return new (zone_) ImportCallExpression(args, pos);
+  }
+
   Zone* zone() const { return zone_; }
   void set_zone(Zone* zone) { zone_ = zone; }