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Add changes notes for Lua changes

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William S Fulton 2014-03-16 21:09:52 +00:00
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@ -12,6 +12,45 @@ Version 3.0.0 (in progress)
CPlusPlus11.html chapter in the documentation which is included in SWIG and also available
online at http://www.swig.org/Doc3.0/CPlusPlus11.html.
2014-03-14: v-for-vandal
[Lua] Numerous Lua improvements:
1. %nspace support has been added. Namespaces are mapped to tables in the module, with the same
name as the C++ namespace.
2. Inheritance is now handled differently. Each class metatable keeps a list of class bases instead
of merging all members of all bases into the derived class.
3. The new metatables result in differences in accessing class members. For example:
%module example
struct Test {
enum { TEST1 = 10, TEST2 = 20 };
static const int ICONST = 12;
};
Now this can be used as follows:
print(example.Test.TEST1)
print(example.Test.ICONST)
The old way was:
print(example.Test_TEST1)
print(example.Test_ICONST)
4. The special class metatable member ".constructor" was removed. Now SWIG generates the proxy
function by itself and assigns it directly to the class table "__call" method.
5. eLua should also now support inheritance.
6. 'const' subtable in eLua is considered deprecated.
Changes in behaviour:
a. You can no longer assign to non-existing class members in classes without a __setitem__ method.
It will cause a Lua error.
b. You can no longer iterate over a module table and copy everything into the global namespace.
Actually, this was never the case, but it is now explicitly prohibited.
c. Now changing a base class will immediately affect all derived classes.
d. There might be some issues with inheritance. Although the bases iteration scheme is the same
as was used for merging base classes into derived one, some unknown issues may arise.
The old metatable behaviour can be restored by using the -no-old-metatable-bindings option.
*** POTENTIAL INCOMPATIBILITY ***
2014-03-06: wsfulton
[Python] Change in default behaviour wrapping C++ bool. Only a Python True or False
will now work for C++ bool parameters. This fixes overloading bool with other types.