Tim Starling
68 linhas
2.3 KiB
C++
68 linhas
2.3 KiB
C++
/*
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+----------------------------------------------------------------------+
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| HipHop for PHP |
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+----------------------------------------------------------------------+
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| Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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*/
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#include "hphp/compiler/statement/statement.h"
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#include "hphp/compiler/analysis/ast_walker.h"
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#include "hphp/compiler/analysis/function_scope.h"
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using namespace HPHP;
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///////////////////////////////////////////////////////////////////////////////
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#define DEC_STMT_NAMES(x) #x
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const char *Statement::Names[] = {
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DECLARE_STATEMENT_TYPES(DEC_STMT_NAMES)
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};
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Statement::Statement(STATEMENT_CONSTRUCTOR_BASE_PARAMETERS)
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: Construct(scope, loc), m_kindOf(kindOf) {
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}
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///////////////////////////////////////////////////////////////////////////////
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// parser functions
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void Statement::addElement(StatementPtr stmt) {
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assert(false);
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}
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void Statement::insertElement(StatementPtr stmt, int index /* = 0 */) {
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assert(false);
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}
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bool Statement::hasReachableLabel() const {
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if (FunctionWalker::SkipRecurse(this)) return false;
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switch (getKindOf()) {
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case KindOfForStatement:
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case KindOfForEachStatement:
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case KindOfWhileStatement:
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case KindOfDoStatement: {
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// a label inside a loop cant be reached from outside the loop
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FunctionScopeRawPtr f = getFunctionScope();
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if (f && f->isGenerator()) break;
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return false;
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}
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case KindOfLabelStatement:
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return true;
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default:
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break;
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}
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for (int i = getKidCount(); i--; ) {
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StatementPtr child(getNthStmt(i));
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if (child && child->hasReachableLabel()) return true;
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}
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return false;
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}
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