[ESNext] Implement DynamicImportCall

src/ast/ast.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_AST_AST_H_
 #define V8_AST_AST_H_
 
 #include "src/ast/ast-types.h"
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/modules.h"
@@ skipping 87 matching lines @@
   V(BinaryOperation)            \
   V(CompareOperation)           \
   V(Spread)                     \
   V(ThisFunction)               \
   V(SuperPropertyReference)     \
   V(SuperCallReference)         \
   V(CaseClause)                 \
   V(EmptyParentheses)           \
   V(GetIterator)                \
   V(DoExpression)               \
-  V(RewritableExpression)
+  V(RewritableExpression)       \
+  V(ImportCallExpression)
 
 #define AST_NODE_LIST(V)                        \
   DECLARATION_NODE_LIST(V)                      \
   STATEMENT_NODE_LIST(V)                        \
   EXPRESSION_NODE_LIST(V)
 
 // Forward declarations
 class AstNodeFactory;
 class Declaration;
 class Module;
@@ skipping 2805 matching lines @@
     DCHECK(this_var->is_this());
     DCHECK(new_target_var->raw_name()->IsOneByteEqualTo(".new.target"));
     DCHECK(this_function_var->raw_name()->IsOneByteEqualTo(".this_function"));
   }
 
   VariableProxy* this_var_;
   VariableProxy* new_target_var_;
   VariableProxy* this_function_var_;
 };
 
+// This AST Node is used to represent a dynamic import call --
+// import(argument).
+class ImportCallExpression final : public Expression {
+ public:
+  Expression* argument() const { return argument_; }
+  void set_argument(Expression* argument) { argument_ = argument; }
+
+ private:
+  friend class AstNodeFactory;
+
+  ImportCallExpression(Expression* argument, int pos)
+      : Expression(pos, kImportCallExpression), argument_(argument) {}
+
+  Expression* argument_;
+};
 
 // This class is produced when parsing the () in arrow functions without any
 // arguments and is not actually a valid expression.
 class EmptyParentheses final : public Expression {
  private:
   friend class AstNodeFactory;
 
   explicit EmptyParentheses(int pos) : Expression(pos, kEmptyParentheses) {}
 };
 
@@ skipping 628 matching lines @@
 
   EmptyParentheses* NewEmptyParentheses(int pos) {
     return new (zone_) EmptyParentheses(pos);
   }
 
   GetIterator* NewGetIterator(Expression* iterable, IteratorType hint,
                               int pos) {
     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; }
 
   // Handles use of temporary zones when parsing inner function bodies.
   class BodyScope {
    public:
     BodyScope(AstNodeFactory* factory, Zone* temp_zone, bool use_temp_zone)
         : factory_(factory), prev_zone_(factory->zone_) {
       if (use_temp_zone) {
         factory->zone_ = temp_zone;
@@ skipping 55 matching lines @@
                                     : NULL;                                   \
   }
 AST_NODE_LIST(DECLARE_NODE_FUNCTIONS)
 #undef DECLARE_NODE_FUNCTIONS
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_AST_H_