Got it.
Thank you!
Paulo F. Andrade
On 2009/09/07, at 16:51, Graham Cox wrote:
Yes, but the return type will cause different compilation of
objc_msgSend. There are several variants of that (obc_msgSend_fpret,
objc_msgSend_stret, etc) depending on which registers are expected
to return what sorts of values - structs vs. floats vs. integers/
objects for example. So the right method will get called but within
the wrong context of what will be returned. You can verify this
yourself by disassembling some variants of calling a test method -
if only the return type varies and the compiler can't disambiguate
based on class of the receiver, it will compile the first version it
finds.
What's probably occurring in your case is that the compiler has used
a version (such as -(id) value) that returns its value in a certain
register, whereas the -(float) value method returns it in a
different register (an fp register, generally). It just so happens
that the register that the caller pulls the result from holds the
slider object.
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