Add optional types to function/method declarations

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/assembler.h"
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/modules.h"
@@ skipping 2918 matching lines @@
   DECLARE_NODE_TYPE(EmptyParentheses)
 
  private:
   EmptyParentheses(Zone* zone, int pos) : Expression(zone, pos) {}
 };
 
 
 // Nodes for the optional type system.
 namespace typesystem {
 
+enum TypeFlags {
+  kNormalTypes = 0,
+  kDisallowTypeParameters = 1 << 0,
+  kDisallowTypeAnnotation = 1 << 1,
+  kAllowSignature = 1 << 2,
+  kConstructorTypes = kDisallowTypeParameters | kDisallowTypeAnnotation
+};
+
 class FormalParameter;
 
 
 // Abstract class for all types.
 // It also covers: binding identifiers, binding (array and object) patterns
 // and formal parameter lists.
 class Type : public AstNode {
  public:
   // Uncovers the case of a single, parenthesized valid type.
   V8_INLINE Type* Uncover(bool* ok);
@@ skipping 1153 matching lines @@
         : NULL;                                                               \
   }
 TYPESYSTEM_NODE_LIST(DECLARE_NODE_FUNCTIONS)
 #undef DECLARE_NODE_FUNCTIONS
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_AST_H_