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FFI: Handle __pairs/__ipairs metamethods for cdata objects.

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This commit is contained in:
Mike Pall
2012-09-03 21:10:10 +02:00
parent 90ec1f90d0
commit 0648fd47cb
5 changed files with 47 additions and 7 deletions
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11
doc/ext_ffi_api.html
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@@ -525,7 +525,16 @@ Returns a string representation of the value of 64 bit integers
complex numbers (<tt><b>"</b>re&plusmn;im<b>i"</b></tt>). Otherwise
returns a string representation of the C&nbsp;type of a ctype object
(<tt><b>"ctype&lt;</b>type<b>&gt;"</b></tt>) or a cdata object
(<tt><b>"cdata&lt;</b>type<b>&gt;:&nbsp;</b>address"</tt>).
(<tt><b>"cdata&lt;</b>type<b>&gt;:&nbsp;</b>address"</tt>), unless you
override it with a <tt>__tostring</tt> metamethod (see
<a href="#ffi_metatype"><tt>ffi.metatype()</tt></a>).
</p>
<h3 id="pairs"><tt>iter, obj, start = pairs(cdata)<br>
iter, obj, start = ipairs(cdata)<br></tt></h3>
<p>
Calls the <tt>__pairs</tt> or <tt>__ipairs</tt> metamethod of the
corresponding ctype.
</p>
<h2 id="literals">Extensions to the Lua Parser</h2>