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Typecheck and compile opaque wrapping functions

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This enables you to write something like

```
A := U8
List.map [1, 2, 3] @A
```

which will be compiled as if it was `List.map [1, 2, 3] \x -> @A x`.

Closes #3499
This commit is contained in:
Ayaz Hafiz 2022-07-12 18:38:03 -04:00
parent d889f1fda9
commit f1a6ea6a40
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9 changed files with 360 additions and 15 deletions
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6
crates/compiler/can/src/traverse.rs
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@ -7,7 +7,10 @@ use roc_types::subs::Variable;
use crate::{
abilities::AbilitiesStore,
def::{Annotation, Declaration, Def},
expr::{self, AccessorData, AnnotatedMark, ClosureData, Declarations, Expr, Field},
expr::{
self, AccessorData, AnnotatedMark, ClosureData, Declarations, Expr, Field,
OpaqueWrapFunctionData,
},
pattern::{DestructType, Pattern, RecordDestruct},
};
@ -220,6 +223,7 @@ pub fn walk_expr<V: Visitor>(visitor: &mut V, expr: &Expr, var: Variable) {
ext_var: _,
} => visitor.visit_expr(&loc_expr.value, loc_expr.region, *field_var),
Expr::Accessor(AccessorData { .. }) => { /* terminal */ }
Expr::OpaqueWrapFunction(OpaqueWrapFunctionData { .. }) => { /* terminal */ }
Expr::Update {
record_var: _,
ext_var: _,