What is (double (^)(int))foofoo
Question
There is an example on cdecl that goes (double (^)(int))foofoo means cast foofoo into block (int) returning double .
What does it mean to cast foofoo into a "block" of int ? What does the symbol ^ exactly mean in this context. Usually it is bitwise XOR.
1 answers
solution1
12 ACCPTED 2010-08-23 21:55:59
It's a GCC extension made by Apple, and implemented also in Clang. Blocks are small unnamed functions and that syntax is the type of a block. See Block Language Spec .
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