On Jan 19, 2021, at 4:58 PM, Alan & Kim Zimmerman <alan.zimm@gmail.com> wrote:

Changing it to remove the final ';' gives a last token of ITccurly.

Changing it to

module Bug where
x = 5
y = 6

Gives a last token of ITsemi.

Alan

On Tue, 19 Jan 2021 at 21:50, Richard Eisenberg <rae@richarde.dev> wrote:

That's bizarre. Does it still happen with explicit braces?

Just to test, I tried

module Bug where {
x = 5;
y = 6;
};

and GHC rejected because of the trailing ;.

Richard

> On Jan 19, 2021, at 4:35 PM, Alan & Kim Zimmerman <alan.zimm@gmail.com> wrote:
>
> I am (still) working on !2418 to bring the API Annotations into the GHC ParsedSource, and making good progress.
>
> I am currently making a rough port of ghc-exactprint, to ensure I can get all the tests around modifying the AST to work.
>
> One of the last pieces is being able to capture the spacing from the last token in the file to the EOF.  I guess technically it is the second last token.
>
> Empirically (calling getTokenStream), it seems this is always ITsemi.  I am not sure how this comes about, as the `module` parsing rule in Parser.y ends with body or body2, and those both finish with an actual or virtual '}'.
>
> Can I rely on the token before ITEof always being ITsemi?
>
> Alan
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