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by int_19h
1254 days ago
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The problem isn't doing it as such; ALGOL 60 could do nested functions just fine. The problem is doing it in an ABI-compatible way when you already have an ABI. The gcc implementation of nested functions does that - they are compatible with regular function pointers - but at the cost of requiring executable stack on at least some platforms. And for C compilers that aren't gcc, the question becomes: why partially implement a non-standard gcc feature? |
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