Tim Starling
139 linhas
4.4 KiB
C++
139 linhas
4.4 KiB
C++
/*
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+----------------------------------------------------------------------+
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| HipHop for PHP |
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+----------------------------------------------------------------------+
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| Copyright (c) 2010-2013 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/expression/encaps_list_expression.h"
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#include "hphp/compiler/expression/expression_list.h"
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#include "hphp/compiler/expression/binary_op_expression.h"
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#include "hphp/compiler/analysis/code_error.h"
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#include "hphp/runtime/base/builtin_functions.h"
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using namespace HPHP;
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///////////////////////////////////////////////////////////////////////////////
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// constructors/destructors
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EncapsListExpression::EncapsListExpression
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(EXPRESSION_CONSTRUCTOR_PARAMETERS, int type, ExpressionListPtr expList)
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: Expression(EXPRESSION_CONSTRUCTOR_PARAMETER_VALUES(EncapsListExpression)),
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m_type(type), m_exps(expList) {
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}
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ExpressionPtr EncapsListExpression::clone() {
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EncapsListExpressionPtr exp(new EncapsListExpression(*this));
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Expression::deepCopy(exp);
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exp->m_exps = Clone(m_exps);
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return exp;
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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 EncapsListExpression::analyzeProgram(AnalysisResultPtr ar) {
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if (m_exps) {
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for (int i = 0; i < m_exps->getCount(); i++) {
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(*m_exps)[i]->analyzeProgram(ar);
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}
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}
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}
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ConstructPtr EncapsListExpression::getNthKid(int n) const {
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switch (n) {
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case 0:
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return m_exps;
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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 EncapsListExpression::getKidCount() const {
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return 1;
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}
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void EncapsListExpression::setNthKid(int n, ConstructPtr cp) {
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switch (n) {
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case 0:
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m_exps = 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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void EncapsListExpression::stripConcat() {
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m_exps->stripConcat();
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}
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ExpressionPtr EncapsListExpression::preOptimize(AnalysisResultConstPtr ar) {
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if (m_type != '`' && m_type != '\'' && m_exps) {
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int count = m_exps->getCount();
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// turn into cascaded concat
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if (count > 1) {
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ExpressionPtr exp =
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BinaryOpExpressionPtr(new BinaryOpExpression(
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getScope(), getLocation(),
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(*m_exps)[0], (*m_exps)[1], '.'));
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for (int i = 2; i < count; i++) {
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exp =
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BinaryOpExpressionPtr(new BinaryOpExpression(
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getScope(), getLocation(),
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exp, (*m_exps)[i], '.'));
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}
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return exp;
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}
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}
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return ExpressionPtr();
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}
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TypePtr EncapsListExpression::inferTypes(AnalysisResultPtr ar, TypePtr type,
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bool coerce) {
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if (m_exps) {
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for (int i = 0; i < m_exps->getCount(); i++) {
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(*m_exps)[i]->inferAndCheck(ar, Type::String, false);
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}
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}
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return Type::String;
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}
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bool EncapsListExpression::canonCompare(ExpressionPtr e) const {
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if (!Expression::canonCompare(e)) return false;
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EncapsListExpressionPtr el = static_pointer_cast<EncapsListExpression>(e);
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return m_type == el->m_type;
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}
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///////////////////////////////////////////////////////////////////////////////
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// code generation functions
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void EncapsListExpression::outputPHP(CodeGenerator &cg, AnalysisResultPtr ar) {
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if (m_type == '`') cg_printf("shell_exec(");
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if (m_exps) {
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for (int i = 0; i < m_exps->getCount(); i++) {
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if (i > 0) cg_printf(" . ");
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(*m_exps)[i]->outputPHP(cg, ar);
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}
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} else {
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cg_printf("''");
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}
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if (m_type == '`') cg_printf(")");
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}
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