Parser changes for supporting top-level SCC annotations

[Ben Gamari]

Ömer Sinan Ağacan <omeragacan at gmail.com> writes:

> I managed to do this without introducing any new pragmas. I added a new
> production that doesn't look for SCC annotations, for top-level expressions. I
> then used it in decl_no_th and topdecl.
>
Yay!

I'll admit I wasn't a fan of the SCC_FUNCTION proposal. SCC pragmas are
already rather wordy with the {-# #-} delimiters and quotes.
SCC_FUNCTION is even worse.

Cheers,

- Ben

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