[Haskell-cafe] Statically checked overloaded strings

[Merijn Verstraaten]

I proposed a static validation for partial conversions from all sorts of polymorphic literals. At the time it was rejected (I don't really recall why), so I ended up implementing something along these lines as a library: https://hackage.haskell.org/package/validated-literals

Which has the benefit that users don't have to deal with writing TH themselves, you can just write a regular pure conversion function.

Cheers,
Merijn

> On 13 Nov 2019, at 23:53, Christopher Done <chrisdone at gmail.com> wrote:
> 
> Hi all,
> 
> I just came up with this neat trick for adding static checks to overloaded strings: https://gist.github.com/chrisdone/809296b769ee36d352ae4f8dbe89a364
> 
> Hope it's helpful.
> 
> I wonder whether the GHC devs would be open to a small patch to permit: $$"..."
> 
> :-)
> 
> Cheers,
> 
> Chris
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