Implement bitwise masking in hex patterns.

[plusvic]

Example: { E0 F:0?1?: :0110 1001: AB }

Everything in between pairs of : is interpreted as a sequence of bits where ? is a wildcard for a single bit. The number of bits in each sequence must be multiple of 4. You can express one nibble in its hex form and the other one in binary, like in F:0?1?:

[travisgoodspeed]

Another syntax might be to have masks in hex, where your prior example would be written as something like the following.

{ E0 F2&FA 69 AB }

Whatever the syntax, I'll gladly use any sort of bit masking feature if it were available. Nybble granularity isn't always the best scale in hex strings.