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