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-rw-r--r--dhall/src/semantics/tck/env.rs6
-rw-r--r--dhall/src/semantics/tck/tyexpr.rs4
-rw-r--r--dhall/src/semantics/tck/typecheck.rs38
3 files changed, 26 insertions, 22 deletions
diff --git a/dhall/src/semantics/tck/env.rs b/dhall/src/semantics/tck/env.rs
index 3b02074..ba7fb73 100644
--- a/dhall/src/semantics/tck/env.rs
+++ b/dhall/src/semantics/tck/env.rs
@@ -120,3 +120,9 @@ impl TyEnv {
self.items.lookup_ty(&var)
}
}
+
+impl<'a> From<&'a TyEnv> for &'a NzEnv {
+ fn from(x: &'a TyEnv) -> Self {
+ x.as_nzenv()
+ }
+}
diff --git a/dhall/src/semantics/tck/tyexpr.rs b/dhall/src/semantics/tck/tyexpr.rs
index 05fa4b5..edba477 100644
--- a/dhall/src/semantics/tck/tyexpr.rs
+++ b/dhall/src/semantics/tck/tyexpr.rs
@@ -56,8 +56,8 @@ impl TyExpr {
}
/// Eval the TyExpr. It will actually get evaluated only as needed on demand.
- pub fn eval(&self, env: &NzEnv) -> Value {
- Value::new_thunk(env, self.to_hir())
+ pub fn eval<'e>(&self, env: impl Into<&'e NzEnv>) -> Value {
+ Value::new_thunk(env.into(), self.to_hir())
}
/// Eval a closed TyExpr (i.e. without free variables). It will actually get evaluated only as
/// needed on demand.
diff --git a/dhall/src/semantics/tck/typecheck.rs b/dhall/src/semantics/tck/typecheck.rs
index ac113cd..7f02832 100644
--- a/dhall/src/semantics/tck/typecheck.rs
+++ b/dhall/src/semantics/tck/typecheck.rs
@@ -73,11 +73,10 @@ fn type_one_layer(
ExprKind::Lam(binder, annot, body) => {
let body_ty = body.get_type()?;
let body_ty = body_ty.to_tyexpr_tyenv(
- &env.insert_type(&binder.clone(), annot.eval(env.as_nzenv())),
+ &env.insert_type(&binder.clone(), annot.eval(env)),
);
let pi_ekind = ExprKind::Pi(binder.clone(), annot.clone(), body_ty);
- type_one_layer(env, pi_ekind, Span::Artificial)?
- .eval(env.as_nzenv())
+ type_one_layer(env, pi_ekind, Span::Artificial)?.eval(env)
}
ExprKind::Pi(_, annot, body) => {
let ks = match annot.get_type()?.as_const() {
@@ -117,7 +116,7 @@ fn type_one_layer(
ExprKind::Builtin(b) => {
let t_hir = type_of_builtin(*b);
let t_tyexpr = typecheck(&t_hir)?;
- t_tyexpr.eval(env.as_nzenv())
+ t_tyexpr.eval(env)
}
ExprKind::BoolLit(_) => Value::from_builtin(Builtin::Bool),
ExprKind::NaturalLit(_) => Value::from_builtin(Builtin::Natural),
@@ -136,7 +135,7 @@ fn type_one_layer(
text_type
}
ExprKind::EmptyListLit(t) => {
- let t = t.eval(env.as_nzenv());
+ let t = t.eval(env);
match &*t.kind() {
ValueKind::AppliedBuiltin(BuiltinClosure {
b: Builtin::List,
@@ -242,7 +241,7 @@ fn type_one_layer(
},
// TODO: branch here only when scrut.get_type() is a Const
_ => {
- let scrut_nf = scrut.eval(env.as_nzenv());
+ let scrut_nf = scrut.eval(env);
match scrut_nf.kind() {
ValueKind::UnionType(kts) => match kts.get(x) {
// Constructor has type T -> < x: T, ... >
@@ -262,7 +261,7 @@ fn type_one_layer(
}
}
ExprKind::Annot(x, t) => {
- let t = t.eval(env.as_nzenv());
+ let t = t.eval(env);
let x_ty = x.get_type()?;
if x_ty != t {
return span_err(&format!(
@@ -274,7 +273,7 @@ fn type_one_layer(
x_ty
}
ExprKind::Assert(t) => {
- let t = t.eval(env.as_nzenv());
+ let t = t.eval(env);
match &*t.kind() {
ValueKind::Equivalence(x, y) if x == y => {}
ValueKind::Equivalence(..) => {
@@ -315,7 +314,7 @@ fn type_one_layer(
);
}
- let arg_nf = arg.eval(env.as_nzenv());
+ let arg_nf = arg.eval(env);
closure.apply(arg_nf)
}
_ => return mkerr(
@@ -380,11 +379,11 @@ fn type_one_layer(
x.get_type()?.to_tyexpr_tyenv(env),
y.get_type()?.to_tyexpr_tyenv(env),
);
- type_one_layer(env, ekind, Span::Artificial)?.eval(env.as_nzenv())
+ type_one_layer(env, ekind, Span::Artificial)?.eval(env)
}
ExprKind::BinOp(BinOp::RecursiveRecordTypeMerge, x, y) => {
- let x_val = x.eval(env.as_nzenv());
- let y_val = y.eval(env.as_nzenv());
+ let x_val = x.eval(env);
+ let y_val = y.eval(env);
let kts_x = match x_val.kind() {
ValueKind::RecordType(kts) => kts,
_ => return span_err("RecordTypeMergeRequiresRecordType"),
@@ -589,8 +588,7 @@ fn type_one_layer(
}
}
- let type_annot =
- type_annot.as_ref().map(|t| t.eval(env.as_nzenv()));
+ let type_annot = type_annot.as_ref().map(|t| t.eval(env));
match (inferred_type, type_annot) {
(Some(t1), Some(t2)) => {
if t1 != t2 {
@@ -621,7 +619,7 @@ fn type_one_layer(
annotation",
);
};
- let annot_val = annot.eval(env.as_nzenv());
+ let annot_val = annot.eval(env);
let err_msg = "The type of `toMap x` must be of the form \
`List { mapKey : Text, mapValue : T }`";
@@ -670,7 +668,7 @@ fn type_one_layer(
let output_type = Value::from_builtin(Builtin::List)
.app(Value::from_kind(ValueKind::RecordType(kts)));
if let Some(annot) = annot {
- let annot_val = annot.eval(env.as_nzenv());
+ let annot_val = annot.eval(env);
if output_type != annot_val {
return span_err("Annotation mismatch");
}
@@ -710,7 +708,7 @@ fn type_one_layer(
_ => return span_err("ProjectionMustBeRecord"),
};
- let selection_val = selection.eval(env.as_nzenv());
+ let selection_val = selection.eval(env);
let sel_kts = match selection_val.kind() {
ValueKind::RecordType(kts) => kts,
_ => return span_err("ProjectionByExprTakesRecordType"),
@@ -782,14 +780,14 @@ pub(crate) fn type_with(env: &TyEnv, hir: &Hir) -> Result<TyExpr, TypeError> {
let ekind = match ekind {
ExprKind::Lam(binder, annot, body) => {
let annot = type_with(env, annot)?;
- let annot_nf = annot.eval(env.as_nzenv());
+ let annot_nf = annot.eval(env);
let body_env = env.insert_type(binder, annot_nf);
let body = type_with(&body_env, body)?;
ExprKind::Lam(binder.clone(), annot, body)
}
ExprKind::Pi(binder, annot, body) => {
let annot = type_with(env, annot)?;
- let annot_nf = annot.eval(env.as_nzenv());
+ let annot_nf = annot.eval(env);
let body_env = env.insert_type(binder, annot_nf);
let body = type_with(&body_env, body)?;
ExprKind::Pi(binder.clone(), annot, body)
@@ -808,7 +806,7 @@ pub(crate) fn type_with(env: &TyEnv, hir: &Hir) -> Result<TyExpr, TypeError> {
};
let val = type_with(env, &val)?;
let val_ty = val.get_type()?;
- let val_nf = val.eval(&env.as_nzenv());
+ let val_nf = val.eval(env);
let body_env = env.insert_value(&binder, val_nf, val_ty);
let body = type_with(&body_env, body)?;
ExprKind::Let(binder.clone(), None, val, body)
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 17:48:23 +0000