src/objects/name.tq

// Copyright 2019 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.

@abstract
@generateCppClass
extern class Name extends PrimitiveHeapObject {
  hash_field: NameHash;
}

bitfield struct NameHash extends uint32 {
  hash_not_commputed: bool: 1 bit;
  is_not_integer_index_mask: bool: 1 bit;
  array_index_value: uint32: 24 bit;
  array_index_length: uint32: 6 bit;
}

// This is the same as Name, but with the information that there are no other
// kinds of names.
type AnyName = PrivateSymbol|PublicSymbol|String;

bitfield struct SymbolFlags extends uint32 {
  is_private: bool: 1 bit;
  is_well_known_symbol: bool: 1 bit;
  is_in_public_symbol_table: bool: 1 bit;
  is_interesting_symbol: bool: 1 bit;
  is_private_name: bool: 1 bit;
  is_private_brand: bool: 1 bit;
}

@generateCppClass
extern class Symbol extends Name {
  flags: SymbolFlags;
  description: String|Undefined;
}

type PublicSymbol extends Symbol;
type PrivateSymbol extends Symbol;

const kNameEmptyHashField: NameHash = NameHash{
  hash_not_commputed: true,
  is_not_integer_index_mask: true,
  array_index_value: 0,
  array_index_length: 0
};

const kMaxCachedArrayIndexLength: constexpr uint32
    generates 'Name::kMaxCachedArrayIndexLength';