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Last active December 20, 2015 05:29
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objc_msgSend cast
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gistfile1.txt
So:
id boxedValue = objc_msgSend(self, mappingSelector, instance, value, boxingParameters);
would become:
id boxedValue = ((id (*)(id, SEL, id, id, id))objc_msgSend)(self, mappingSelector, instance, value, boxingParameters);
The first `id` and `SEL` are basically `self` and `_cmd`, the first 2 arguments in any objc_msgSend.
@krzysztofzablocki
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krzysztofzablocki commented Jul 25, 2013

Does that look ok?

id (_objc_msgSendTyped)(id, SEL, id, id, NSArray _) = (void*)objc_msgSend;
boxedValue = objc_msgSendTyped(self, mappingSelector, instance, value, boxingParameters);

@ddeville
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ddeville commented Jul 25, 2013

Pardon the mess with the arguments on the original version :(

Yeah that looks fine to me.

@0xced
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0xced commented Jul 25, 2013

There is an easy way to catch these errors:

With 10.8 SDK, #define OBJC_OLD_DISPATCH_PROTOTYPES 0 at the top of your file or PCH to get errors if you use objc_msgSend without a cast.

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