55f93b5532
in preparation of the introduction of ES6 'symbols' (aka private/unique names). The SymbolTable became the StringTable. I also made sure to adapt all comments. The only remaining use of the term "symbol" (other than unrelated uses in the parser and such) is now 'NewSymbol' in the API and the 'V8.KeyedLoadGenericSymbol' counter, changing which might break embedders. The one functional change in this CL is that I removed the former 'empty_string' constant, since it is redundant given the 'empty_symbol' constant that we also had (and both were used inconsistently). R=yangguo@chromium.org BUG= Review URL: https://codereview.chromium.org/12210083 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13781 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "ast.h"
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#include "scopes.h"
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#include "variables.h"
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namespace v8 {
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namespace internal {
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// ----------------------------------------------------------------------------
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// Implementation Variable.
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const char* Variable::Mode2String(VariableMode mode) {
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switch (mode) {
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case VAR: return "VAR";
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case CONST: return "CONST";
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case LET: return "LET";
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case CONST_HARMONY: return "CONST_HARMONY";
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case MODULE: return "MODULE";
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case DYNAMIC: return "DYNAMIC";
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case DYNAMIC_GLOBAL: return "DYNAMIC_GLOBAL";
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case DYNAMIC_LOCAL: return "DYNAMIC_LOCAL";
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case INTERNAL: return "INTERNAL";
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case TEMPORARY: return "TEMPORARY";
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}
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UNREACHABLE();
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return NULL;
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}
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Variable::Variable(Scope* scope,
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Handle<String> name,
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VariableMode mode,
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bool is_valid_LHS,
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Kind kind,
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InitializationFlag initialization_flag,
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Interface* interface)
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: scope_(scope),
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name_(name),
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mode_(mode),
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kind_(kind),
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location_(UNALLOCATED),
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index_(-1),
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initializer_position_(RelocInfo::kNoPosition),
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local_if_not_shadowed_(NULL),
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is_valid_LHS_(is_valid_LHS),
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force_context_allocation_(false),
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is_used_(false),
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initialization_flag_(initialization_flag),
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interface_(interface) {
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// Names must be canonicalized for fast equality checks.
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ASSERT(name->IsInternalizedString());
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// Var declared variables never need initialization.
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ASSERT(!(mode == VAR && initialization_flag == kNeedsInitialization));
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}
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bool Variable::IsGlobalObjectProperty() const {
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// Temporaries are never global, they must always be allocated in the
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// activation frame.
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return (IsDynamicVariableMode(mode_) ||
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(IsDeclaredVariableMode(mode_) && !IsLexicalVariableMode(mode_)))
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&& scope_ != NULL && scope_->is_global_scope();
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}
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int Variable::CompareIndex(Variable* const* v, Variable* const* w) {
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int x = (*v)->index();
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int y = (*w)->index();
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// Consider sorting them according to type as well?
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return x - y;
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}
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} } // namespace v8::internal
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