Implementation-wise, it's no so difficult to include - the lexer needs to
be tweaked. But it seems like a specialised use-case that will only affect
a minority of users is probably not worthwhile as an extension to the
language/compiler.
Maybe you can try using OverloadedStrings and implement this as a library?
```
newtype Binary = Binary Integer
deriving Num
instance IsString Binary where
fromString binaryLiteral = error "Code here to parse binary literal with
underscores"
binaryVal :: Binary
binaryVal = "1101_1110_0101"
```
Hope that helps,
Rahul
On Tue, Sep 26, 2017 at 8:40 AM, 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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