ucsd-progsys/liquidhaskell

Liquid Haskell should accept `UnicodeSyntax`

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#2,551 创建于 2025年6月8日

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描述

Setting {-# LANGUAGE UnicodeSyntax #-} in a source file allows us to use, e.g., → and ∷ as -> and ::, but this doesn't apply to Liquid Haskell code, which even with UnicodeSyntax enabled still accepts only the latter. It would be nice if we could use UnicodeSyntax in Liquid Haskell as well.

(Given that we can't at the moment, I've had to abandon UnicodeSyntax for my projects that use Liquid Haskell, as having a mix of the two in the same file makes searching and the like more difficult.)

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developer experiencetooling
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feature
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前置要求
Haskell programmingLiquid Haskell basicsGHC extensions knowledgeParser modification
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70
研究方向
Investigate how Liquid Haskell currently handles GHC extensions like UnicodeSyntax. Look for existing parser code that converts Unicode tokens to ASCII equivalents. Consider modifying the lexer or parser to accept Unicode characters (→ for >, ∷ for ::) when the UnicodeSyntax extension is enabled. Check for any existing issues or pull requests related to Unicode support.
Liquid Haskell should accept `UnicodeSyntax` · ucsd-progsys/liquidhaskell#2551 | Good First Issue