perl6 - Converting data in a Blob into a Num

问题:

I've got some bytes in a blob, an immutable buffer for binary data and I am looking for a way to convert what it holds into a floating point data structure, Num, since it is the class that fits all those 3 formats that could be in the $blob

1. IEEE Float
2. IEEE Double
3. IEEE Long Double

What would be the best way of doing that conversion?

回答1:

Import NativeCall, perform a cast to a pointer of desired type and dereference the result:

use NativeCall;
nativecast(Pointer[num32], $blob).deref;