[erlang-questions] Binary matching: <<String/binary, 0>> and <<Prefix/binary, Postfix/binary>>
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Max Lapshin
Nov 16, 2012, 5:27:42 AM11/16/12
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Hi.
There are two forms of matching binaries, that are not supported:
extract_string(<<String/binary, 0>>) -> String.
extract_postfix(<<Prefix/binary, Postfix/binary>>, Prefix) -> Postfix.
Second one is perhaps too hard to implement, but first one seems to be not to hard (we just match end of binary on known offset and match beginning).
Why aren't these cases implemented? Is it just "nobody wanted it yet" or there is some serious reason not to do it.
There are two forms of matching binaries, that are not supported:
extract_string(<<String/binary, 0>>) -> String.
extract_postfix(<<Prefix/binary, Postfix/binary>>, Prefix) -> Postfix.
Second one is perhaps too hard to implement, but first one seems to be not to hard (we just match end of binary on known offset and match beginning).
Why aren't these cases implemented? Is it just "nobody wanted it yet" or there is some serious reason not to do it.
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