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Merge pull request #159 from v-for-vandal/issue_154

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Fixing issue 154
This commit is contained in:
Olly Betts 2014-04-29 11:19:58 +12:00
commit 4c86f17bcb
5 changed files with 335 additions and 9 deletions
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26
Doc/Manual/Lua.html
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@ -990,7 +990,7 @@ The current list of operators which can be overloaded (and the alternative funct
<li><tt>__sub__</tt> operator-
<li><tt>__mul__</tt> operator *
<li><tt>__div__</tt> operator/
<li><tt>__neg__</tt> unary minus
<li><tt>__unm__</tt> unary minus
<li><tt>__call__</tt> operator<tt>()</tt> (often used in functor classes)
<li><tt>__pow__</tt> the exponential fn (no C++ equivalent, Lua uses <tt>^</tt>)
<li><tt>__concat__</tt> the concatenation operator (SWIG maps C++'s <tt>~</tt> to Lua's <tt>..</tt>)
@ -1037,7 +1037,29 @@ It is also possible to overload the operator<tt>[]</tt>, but currently this cann
void __setitem__(int i,double d); // i is the index, d is the data
};
</pre></div>
<p>
C++ operators are mapped to Lua predefined metafunctions. Class inherits from its bases the following list of metafunctions ( thus inheriting the folloging
operators and pseudo-operators):</p>
<ul>
<li><tt>__add__</tt>
<li><tt>__sub__</tt>
<li><tt>__mul__</tt>
<li><tt>__div__</tt>
<li><tt>__unm__</tt>
<li><tt>__mod__</tt>
<li><tt>__call__</tt>
<li><tt>__pow__</tt>
<li><tt>__concat__</tt>
<li><tt>__eq__</tt>
<li><tt>__lt__</tt>
<li><tt>__le__</tt>
<li><tt>__len__</tt>
<li><tt>__getitem__</tt>
<li><tt>__setitem__</tt>
<li><tt>__tostring</tt> used internaly by Lua for tostring() function. __str__ is mapped to this function
</ul>
<p>No other lua metafunction is inherited. For example, __gc is not inherited and must be redefined in every class. <tt>__tostring</tt> is subject to a special handling. If absent in class and in class bases, a default one will be provided by SWIG</p>
</p>
<H3><a name="Lua_nn19"></a>27.3.12 Class extension with %extend</H3>