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lang-cpp
__COUNTER__based solution has issues too: you better hope your magic macro is the only user of__COUNTER__, at least before you're done with your use of__COUNTER__. The problem basically all comes down to the simple facts that__COUNTER__/__LINE__are preprocessor features and the preprocessor works in one pass, so you can't backpatch an integer constant expression later based on__COUNTER__/__LINE__. The only way (in C at least) is to avoid the need in the first place, e.g., by using forward array declarations without size (incompletely typed array declarations).\does not affect__LINE__- if there is a line break,__LINE__increases. Example 1, example 2.