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#include <stdio.h> |
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#include <Block.h> |
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typedef int (^IntBlock)(); |
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|
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IntBlock MakeCounter(int start, int increment) { |
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__block int i = start; |
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|
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return Block_copy( ^ { |
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int ret = i; |
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i += increment; |
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return ret; |
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}); |
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|
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} |
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|
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int main(void) { |
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IntBlock mycounter = MakeCounter(5, 2); |
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printf("First call: %d\n", mycounter()); |
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printf("Second call: %d\n", mycounter()); |
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printf("Third call: %d\n", mycounter()); |
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|
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/* because it was copied, it must also be released */ |
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Block_release(mycounter); |
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|
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return 0; |
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} |
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/* Output: |
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First call: 5 |
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Second call: 7 |
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Third call: 9 |
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*/ |
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|
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// From https://en.wikipedia.org/wiki/Objective-C |
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