Ben,
Thanks for the in-depth elaboration of what Mathew/Simon were
describing! It seems within reach!
> Of course, in the case that you have a concrete dictionary you *also*
> want to know the source location of the instance declaration from which
> it arose. I'm afraid this may be quite
Christopher Done writes:
> Hi all,
>
> Given a TypecheckedModule, what's the most direct way given a Var
> expression retrieved from the AST, to determine:
>
> 1) that it's a class method e.g. `read`
> 2) that it's a generic call (no instance chosen) e.g. `Read a => a -> String`
> 3) or if it's
Sorry, they are not "frontend plugins" but a new feature that will be
in GHC 8.6.
They are an implementation of this GHC proposal.
https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0017-source-plugins.rst
There is also this thread last year about the same topic which Simon
Chris,
I have also considered this question.
1. Look at the `idDetails` of the `Id`. A class selector is a `ClassOpId`.
2,3,
When a class selector `foo` is typechecked, the instance information
is of course resolved. The selector `foo` is then wrapped in a
`HsWrapper` which when desugared will
Hi all,
Given a TypecheckedModule, what's the most direct way given a Var
expression retrieved from the AST, to determine:
1) that it's a class method e.g. `read`
2) that it's a generic call (no instance chosen) e.g. `Read a => a -> String`
3) or if it's a resolved instance, then which instance
