mwilliams
141 linhas
4.5 KiB
C++
141 linhas
4.5 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/class_constant.h>
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#include <compiler/analysis/analysis_result.h>
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#include <compiler/expression/expression_list.h>
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#include <compiler/expression/constant_expression.h>
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#include <compiler/analysis/class_scope.h>
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#include <compiler/analysis/constant_table.h>
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#include <compiler/expression/assignment_expression.h>
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#include <compiler/expression/scalar_expression.h>
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#include <compiler/option.h>
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using namespace HPHP;
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///////////////////////////////////////////////////////////////////////////////
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// constructors/destructors
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ClassConstant::ClassConstant
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(STATEMENT_CONSTRUCTOR_PARAMETERS, ExpressionListPtr exp)
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: Statement(STATEMENT_CONSTRUCTOR_PARAMETER_VALUES(ClassConstant)),
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m_exp(exp) {
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}
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StatementPtr ClassConstant::clone() {
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ClassConstantPtr stmt(new ClassConstant(*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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void ClassConstant::onParseRecur(AnalysisResultConstPtr ar,
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ClassScopePtr scope) {
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ConstantTablePtr constants = scope->getConstants();
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if (scope->isTrait()) {
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parseTimeFatal(Compiler::InvalidTraitStatement,
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"Traits cannot have constants");
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}
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for (int i = 0; i < m_exp->getCount(); i++) {
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AssignmentExpressionPtr assignment =
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dynamic_pointer_cast<AssignmentExpression>((*m_exp)[i]);
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ExpressionPtr var = assignment->getVariable();
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const std::string &name =
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dynamic_pointer_cast<ConstantExpression>(var)->getName();
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if (constants->isPresent(name)) {
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assignment->parseTimeFatal(Compiler::DeclaredConstantTwice,
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"Cannot redeclare %s::%s",
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scope->getOriginalName().c_str(),
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name.c_str());
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} else {
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assignment->onParseRecur(ar, scope);
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// static analysis functions
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void ClassConstant::analyzeProgram(AnalysisResultPtr ar) {
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m_exp->analyzeProgram(ar);
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}
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ConstructPtr ClassConstant::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 ClassConstant::getKidCount() const {
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return 1;
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}
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void ClassConstant::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 ClassConstant::preOptimize(AnalysisResultConstPtr ar) {
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for (int i = 0; i < m_exp->getCount(); i++) {
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AssignmentExpressionPtr assignment =
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dynamic_pointer_cast<AssignmentExpression>((*m_exp)[i]);
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ExpressionPtr var = assignment->getVariable();
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ExpressionPtr val = assignment->getValue();
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const std::string &name =
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dynamic_pointer_cast<ConstantExpression>(var)->getName();
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Symbol *sym = getScope()->getConstants()->getSymbol(name);
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Lock lock(BlockScope::s_constMutex);
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if (sym->getValue() != val) {
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getScope()->addUpdates(BlockScope::UseKindConstRef);
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sym->setValue(val);
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}
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}
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return StatementPtr();
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}
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void ClassConstant::inferTypes(AnalysisResultPtr ar) {
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m_exp->inferAndCheck(ar, Type::Some, false);
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}
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///////////////////////////////////////////////////////////////////////////////
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// code generation functions
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void ClassConstant::outputPHP(CodeGenerator &cg, AnalysisResultPtr ar) {
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cg_printf("const ");
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m_exp->outputPHP(cg, ar);
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cg_printf(";\n");
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}
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