Tim Starling
68 linhas
2.1 KiB
C++
68 linhas
2.1 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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#ifndef incl_HPHP_STRING_OFFSET_H_
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#define incl_HPHP_STRING_OFFSET_H_
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#include "hphp/runtime/base/types.h"
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#include "hphp/runtime/base/string_data.h"
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#include "hphp/runtime/base/util/exceptions.h"
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namespace HPHP {
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///////////////////////////////////////////////////////////////////////////////
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/**
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* Handles sub-string expressions. This class should delegate all real work to
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* StringData.
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*/
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class StringOffset {
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public:
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/**
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* Constructor. "offset" is where we are at in the string.
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*/
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StringOffset(StringData *data, int offset)
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: m_data(data), m_offset(offset) {
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assert(m_data);
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}
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/**
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* Get r-value of this offset object.
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*/
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operator String() const;
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/**
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* Get l-value of this offset object. Well, not quite, since this is illegal.
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*/
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String &lval() const {
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throw InvalidOperandException("taking l-value of a string offset");
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}
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/**
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* Assignement operator. Almost the whole purpose for having this offset
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* class.
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*/
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StringOffset &operator=(CVarRef v);
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private:
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StringData *m_data;
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int m_offset;
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};
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///////////////////////////////////////////////////////////////////////////////
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}
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#endif // incl_HPHP_STRING_OFFSET_H_
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