Underscore in binary literals

[Takenobu Tani]

Dear devs,

GHC's BinaryLiterals extension is useful.
(For example, x = 0b110111000101)

Is it difficult to include underscore(_) in the format like Verilog-HDL[1] ?
(For example, x = 0b1101_1100_0101)

[1]:
https://inst.eecs.berkeley.edu/~cs150/fa06/Labs/verilog-ieee.pdf#page=20

Regards,
Takenobu
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