mwilliams
83 linhas
2.9 KiB
C++
83 linhas
2.9 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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#ifndef __CONSTANT_EXPRESSION_H__
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#define __CONSTANT_EXPRESSION_H__
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#include <compiler/expression/expression.h>
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#define CONSTANT(value) makeConstant(ar, value)
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namespace HPHP {
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///////////////////////////////////////////////////////////////////////////////
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DECLARE_BOOST_TYPES(ConstantExpression);
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class ConstantExpression : public Expression, IParseHandler {
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public:
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ConstantExpression(EXPRESSION_CONSTRUCTOR_PARAMETERS,
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const std::string &name,
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const std::string &docComment = "");
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DECLARE_BASE_EXPRESSION_VIRTUAL_FUNCTIONS;
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void onParse(AnalysisResultConstPtr ar, FileScopePtr scope);
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ExpressionPtr preOptimize(AnalysisResultConstPtr ar);
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virtual bool isTemporary() const {
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return isNull() || isBoolean();
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}
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virtual bool isScalar() const;
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virtual bool isLiteralNull() const;
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virtual int getLocalEffects() const { return NoEffect; }
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virtual bool getScalarValue(Variant &value);
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virtual bool containsDynamicConstant(AnalysisResultPtr ar) const {
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return !m_valid || m_dynamic;
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}
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virtual unsigned getCanonHash() const;
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virtual bool canonCompare(ExpressionPtr e) const;
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const std::string &getName() const { return m_name;}
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const std::string &getDocComment() const {
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return m_docComment;
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}
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bool isNull() const;
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bool isBoolean() const;
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bool isDouble() const;
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bool getBooleanValue() const;
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void pushConst(const std::string &name);
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void popConst();
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void setComment(const std::string &comment) { m_comment = comment;}
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const std::string getComment() { return m_comment;}
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bool isValid() const { return m_valid; }
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bool isDynamic() const { return m_dynamic; }
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private:
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Symbol *resolveNS(AnalysisResultConstPtr ar);
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std::string m_name;
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std::string m_docComment;
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std::string m_comment; // for inlined constant name
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bool m_valid;
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bool m_dynamic;
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bool m_visited;
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bool m_depsSet;
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};
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///////////////////////////////////////////////////////////////////////////////
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}
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#endif // __CONSTANT_EXPRESSION_H__
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