让我们:
Type = bitstring.
<<FirstPart:8/Type, Rest/bitstring>> = some_binary.
尽管我允许:
Size = 8.
<<FirstPart:Size/bitstring, Rest/bitstring>> = some_binary.
因此,在缩略语中,虽然我可以通过一个变数通过大小,但我却想通过一个变数通过这一类型。 是否有解决办法?
让我们:
Type = bitstring.
<<FirstPart:8/Type, Rest/bitstring>> = some_binary.
尽管我允许:
Size = 8.
<<FirstPart:Size/bitstring, Rest/bitstring>> = some_binary.
因此,在缩略语中,虽然我可以通过一个变数通过大小,但我却想通过一个变数通过这一类型。 是否有解决办法?
你可以把案件陈述作为工作:
{FirstPart, Rest} = case Type of
{ bitstring , Len} ->
<<A:Len/bitstring, B/bitstring>> = Bin,
{A,B};
integer ->
<<A/integer, B/bitstring>> = Bin,
{A,B};
...
我在这里看不出任何非常的情况,使得处理不同的编码“类型”的条件不方便。
case StringType of
byte_len ->
<<Len:8, String:Len/binary>> = SomeBinary,
String;
word_len ->
<<Len:32, String:Len/binary>> = SomeBinary,
String;
etc -> ...
end
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