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Forward declaration of primitive variables. Turns out it's legal.
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| #import <Foundation/Foundation.h> | |
| int foo; | |
| int foo; | |
| int foo; | |
| int foo; | |
| int foo = 4; | |
| int main(int argc, const char **argv) { | |
| NSLog(@"foo: %i", foo); // Prints '4' | |
| return 0; | |
| } |
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Apparently these are actually called "tentative declarations", only valid in C. (Not C++.)