Tim Starling
105 linhas
3.4 KiB
C++
105 linhas
3.4 KiB
C++
/*
|
|
+----------------------------------------------------------------------+
|
|
| HipHop for PHP |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 2010-2013 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 "hphp/compiler/statement/statement.h"
|
|
#include "hphp/compiler/statement/unset_statement.h"
|
|
#include "hphp/compiler/expression/expression_list.h"
|
|
#include "hphp/compiler/analysis/code_error.h"
|
|
#include "hphp/compiler/analysis/analysis_result.h"
|
|
#include "hphp/compiler/analysis/variable_table.h"
|
|
#include "hphp/compiler/expression/simple_variable.h"
|
|
#include "hphp/compiler/statement/block_statement.h"
|
|
#include "hphp/compiler/analysis/block_scope.h"
|
|
#include "hphp/compiler/expression/array_element_expression.h"
|
|
#include "hphp/compiler/expression/scalar_expression.h"
|
|
|
|
using namespace HPHP;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// constructors/destructors
|
|
|
|
UnsetStatement::UnsetStatement
|
|
(STATEMENT_CONSTRUCTOR_PARAMETERS, ExpressionListPtr exp)
|
|
: Statement(STATEMENT_CONSTRUCTOR_PARAMETER_VALUES(UnsetStatement)),
|
|
m_exp(exp) {
|
|
exp->setContext(Expression::UnsetContext);
|
|
}
|
|
|
|
StatementPtr UnsetStatement::clone() {
|
|
UnsetStatementPtr stmt(new UnsetStatement(*this));
|
|
stmt->m_exp = Clone(m_exp);
|
|
return stmt;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// parser functions
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// static analysis functions
|
|
|
|
void UnsetStatement::analyzeProgram(AnalysisResultPtr ar) {
|
|
m_exp->analyzeProgram(ar);
|
|
}
|
|
|
|
ConstructPtr UnsetStatement::getNthKid(int n) const {
|
|
switch (n) {
|
|
case 0:
|
|
return m_exp;
|
|
default:
|
|
assert(false);
|
|
break;
|
|
}
|
|
return ConstructPtr();
|
|
}
|
|
|
|
int UnsetStatement::getKidCount() const {
|
|
return 1;
|
|
}
|
|
|
|
void UnsetStatement::setNthKid(int n, ConstructPtr cp) {
|
|
switch (n) {
|
|
case 0:
|
|
m_exp = boost::dynamic_pointer_cast<ExpressionList>(cp);
|
|
break;
|
|
default:
|
|
assert(false);
|
|
break;
|
|
}
|
|
}
|
|
|
|
StatementPtr UnsetStatement::preOptimize(AnalysisResultConstPtr ar) {
|
|
if (m_exp->getCount() == 0) return NULL_STATEMENT();
|
|
return StatementPtr();
|
|
}
|
|
|
|
StatementPtr UnsetStatement::postOptimize(AnalysisResultConstPtr ar) {
|
|
if (m_exp->getCount() == 0) return NULL_STATEMENT();
|
|
return StatementPtr();
|
|
}
|
|
|
|
void UnsetStatement::inferTypes(AnalysisResultPtr ar) {
|
|
m_exp->inferAndCheck(ar, Type::Variant, true);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// code generation functions
|
|
|
|
void UnsetStatement::outputPHP(CodeGenerator &cg, AnalysisResultPtr ar) {
|
|
cg_printf("unset(");
|
|
m_exp->outputPHP(cg, ar);
|
|
cg_printf(");\n");
|
|
}
|