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That's an awesome trick, using angle brackets that aren't angle brackets!


It really reminds me of early C macros where people use the ## operator to synthesize monomorphized versions.


The ## operator is an ANSI C feature, so not really "early". In pre-ANSI preprocessors you had to abuse the lexer to paste tokens, e.g. by relying on // being deleted - nowadays comments are replaced by space.




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