Jordan DeLong
80 linhas
2.9 KiB
C++
80 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 incl_HPHP_SIMPLE_VARIABLE_H_
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#define incl_HPHP_SIMPLE_VARIABLE_H_
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#include <compiler/expression/expression.h>
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namespace HPHP {
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///////////////////////////////////////////////////////////////////////////////
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class Symbol;
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DECLARE_BOOST_TYPES(SimpleVariable);
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class SimpleVariable : public Expression {
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public:
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SimpleVariable(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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virtual int getLocalEffects() const;
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virtual bool isThis() const { return m_this;}
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bool isSuperGlobal() const { return m_superGlobal || m_globals; }
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virtual bool isRefable(bool checkError = false) const {
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return checkError || !m_this;
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}
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virtual TypePtr inferAndCheck(AnalysisResultPtr ar, TypePtr type,
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bool coerce);
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virtual bool canonCompare(ExpressionPtr e) const;
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virtual void setContext(Context context);
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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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Symbol *getSymbol() const { return m_sym; }
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bool couldBeAliased() const;
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bool canKill(bool unset) const;
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bool isHidden() const;
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bool checkUnused() const;
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bool getAlwaysStash() const { return m_alwaysStash; }
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void setAlwaysStash() { m_alwaysStash = true; }
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void updateSymbol(SimpleVariablePtr src);
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void coalesce(SimpleVariablePtr other);
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private:
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std::string getNamePrefix() const;
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std::string m_name;
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std::string m_docComment;
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TypePtr m_superGlobalType;
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Symbol *m_sym;
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Symbol *m_originalSym;
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unsigned m_this : 1; // whether this is a legitimate $this
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unsigned m_globals : 1; // whether is is $GLOBAL
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unsigned m_superGlobal : 1;
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unsigned m_alwaysStash : 1;
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};
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///////////////////////////////////////////////////////////////////////////////
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}
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#endif // incl_HPHP_SIMPLE_VARIABLE_H_
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