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