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Effect annotations #127

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ppolesiuk opened this issue Jun 15, 2024 · 0 comments
Open

Effect annotations #127

ppolesiuk opened this issue Jun 15, 2024 · 0 comments
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enhancement New feature or request good first issue Good for newcomers proposal New ideas that should be discussed, but not necessarily implemented

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@ppolesiuk
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Expressions can be annotated with types (e : τ). It would be useful to annotate them with effects. We have to agree on concrete syntax. I see the two options (I prefer the first one):

  1. In order to be consistent with syntax of arrows, we can have e : [Eff] Typ syntax.
  2. We can follow the notations from formal metatheory and syntax of Helium: e : Typ / Eff.

In both cases there is a question how to annotate that the expression is strongly pure (it always terminates). Maybe just by omitting the effect?
@ppolesiuk ppolesiuk added enhancement New feature or request proposal New ideas that should be discussed, but not necessarily implemented labels Jun 15, 2024
@forell forell added the good first issue Good for newcomers label Oct 8, 2024
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@ppolesiuk @forell