diff options
Diffstat (limited to 'dhall')
| -rw-r--r-- | dhall/src/expr.rs | 20 | ||||
| -rw-r--r-- | dhall/src/normalize.rs | 21 | ||||
| -rw-r--r-- | dhall/src/typecheck.rs | 31 |
3 files changed, 39 insertions, 33 deletions
diff --git a/dhall/src/expr.rs b/dhall/src/expr.rs index 44d1612..1840eba 100644 --- a/dhall/src/expr.rs +++ b/dhall/src/expr.rs @@ -10,6 +10,8 @@ macro_rules! derive_other_traits { } } + impl<'a> std::cmp::Eq for $ty<'a> {} + impl<'a> std::fmt::Display for $ty<'a> { fn fmt( &self, @@ -21,28 +23,29 @@ macro_rules! derive_other_traits { }; } -#[derive(Debug, Clone, Eq)] +#[derive(Debug, Clone)] pub(crate) struct Parsed<'a>( pub(crate) SubExpr<Span<'a>, Import>, pub(crate) ImportRoot, ); derive_other_traits!(Parsed); -#[derive(Debug, Clone, Eq)] +#[derive(Debug, Clone)] pub(crate) struct Resolved<'a>( pub(crate) SubExpr<Span<'a>, Normalized<'static>>, ); derive_other_traits!(Resolved); -#[derive(Debug, Clone, Eq)] +#[derive(Debug, Clone)] pub(crate) struct Typed<'a>( pub(crate) SubExpr<X, Normalized<'static>>, pub(crate) Option<Type<'static>>, + pub(crate) crate::typecheck::TypecheckContext, pub(crate) PhantomData<&'a ()>, ); derive_other_traits!(Typed); -#[derive(Debug, Clone, Eq)] +#[derive(Debug, Clone)] pub(crate) struct Normalized<'a>( pub(crate) SubExpr<X, X>, pub(crate) Option<Type<'static>>, @@ -56,7 +59,7 @@ derive_other_traits!(Normalized); /// `Bool`, `{ x: Integer }` or `Natural -> Text`. /// /// For a more general notion of "type", see [Type]. -#[derive(Debug, Clone, Eq)] +#[derive(Debug, Clone)] pub struct SimpleType<'a>( pub(crate) SubExpr<X, X>, pub(crate) PhantomData<&'a ()>, @@ -101,7 +104,12 @@ impl<'a> From<SubExpr<X, X>> for SimpleType<'a> { #[doc(hidden)] impl<'a> From<Normalized<'a>> for Typed<'a> { fn from(x: Normalized<'a>) -> Typed<'a> { - Typed(x.0.embed_absurd(), x.1, x.2) + Typed( + x.0.embed_absurd(), + x.1, + crate::typecheck::TypecheckContext::new(), + x.2, + ) } } diff --git a/dhall/src/normalize.rs b/dhall/src/normalize.rs index 0301e35..35a6b23 100644 --- a/dhall/src/normalize.rs +++ b/dhall/src/normalize.rs @@ -16,20 +16,13 @@ type OutputSubExpr = SubExpr<X, X>; impl<'a> Typed<'a> { pub fn normalize(self) -> Normalized<'a> { - Normalized(normalize(self.0), self.1, self.2) - } - pub fn normalize_ctx( - self, - ctx: &crate::typecheck::TypecheckContext, - ) -> Normalized<'a> { Normalized( - normalize_whnf( - NormalizationContext::from_typecheck_ctx(ctx), + normalize( + NormalizationContext::from_typecheck_ctx(&self.2), self.0, - ) - .normalize_to_expr(), + ), self.1, - self.2, + self.3, ) } /// Pretends this expression is normalized. Use with care. @@ -38,7 +31,7 @@ impl<'a> Typed<'a> { Normalized( self.0.unroll().squash_embed(|e| e.0.clone()), self.1, - self.2, + self.3, ) } } @@ -832,8 +825,8 @@ fn normalize_last_layer(expr: ExprF<WHNF, Label, X, X>) -> WHNF { /// However, `normalize` will not fail if the expression is ill-typed and will /// leave ill-typed sub-expressions unevaluated. /// -fn normalize(e: InputSubExpr) -> OutputSubExpr { - normalize_whnf(NormalizationContext::new(), e).normalize_to_expr() +fn normalize(ctx: NormalizationContext, e: InputSubExpr) -> OutputSubExpr { + normalize_whnf(ctx, e).normalize_to_expr() } #[cfg(test)] diff --git a/dhall/src/typecheck.rs b/dhall/src/typecheck.rs index e397316..a53e88a 100644 --- a/dhall/src/typecheck.rs +++ b/dhall/src/typecheck.rs @@ -28,7 +28,7 @@ impl<'a> Resolved<'a> { /// Pretends this expression has been typechecked. Use with care. #[allow(dead_code)] pub fn skip_typecheck(self) -> Typed<'a> { - Typed(self.0.unnote(), None, PhantomData) + Typed(self.0.unnote(), None, TypecheckContext::new(), PhantomData) } } impl<'a> Typed<'a> { @@ -420,7 +420,7 @@ fn mktype( ctx: &TypecheckContext, e: SubExpr<X, Normalized<'static>>, ) -> Result<Type<'static>, TypeError> { - Ok(type_with(ctx, e)?.normalize_ctx(ctx).into_type()) + Ok(type_with(ctx, e)?.normalize().into_type()) } fn into_simple_type<'a>(e: SubExpr<X, X>) -> Type<'a> { @@ -498,7 +498,7 @@ fn type_with( v.clone() }; - let v = type_with(ctx, v)?.normalize_ctx(ctx); + let v = type_with(ctx, v)?.normalize(); let e = type_with(&ctx.insert_value(x, v.clone()), e.clone())?; Ok(RetType(e.get_type_move()?)) @@ -513,8 +513,13 @@ fn type_with( ), }?; match ret { - RetExpr(ret) => Ok(Typed(e, Some(mktype(ctx, rc(ret))?), PhantomData)), - RetType(typ) => Ok(Typed(e, Some(typ), PhantomData)), + RetExpr(ret) => Ok(Typed( + e, + Some(mktype(ctx, rc(ret))?), + ctx.clone(), + PhantomData, + )), + RetType(typ) => Ok(Typed(e, Some(typ), ctx.clone(), PhantomData)), } } @@ -556,12 +561,12 @@ fn type_last_layer( Ok(RetExpr(Let( x.clone(), None, - a.normalize_ctx(ctx).embed(), + a.normalize().embed(), tb.embed_absurd(), ))) } Annot(x, t) => { - let t = t.normalize_ctx(ctx).into_type(); + let t = t.normalize().into_type(); ensure_equal!( &t, x.get_type()?, @@ -595,7 +600,7 @@ fn type_last_layer( Ok(RetType(y.get_type_move()?)) } EmptyListLit(t) => { - let t = t.normalize_ctx(ctx).into_type(); + let t = t.normalize().into_type(); ensure_simple_type!( t, mkerr(InvalidListType(t.into_normalized()?)), @@ -626,13 +631,13 @@ fn type_last_layer( Ok(RetExpr(dhall::expr!(List t))) } OldOptionalLit(None, t) => { - let t = t.normalize_ctx(ctx).embed(); + let t = t.normalize().embed(); let e = dhall::subexpr!(None t); Ok(RetType(type_with(ctx, e)?.get_type()?.into_owned())) } OldOptionalLit(Some(x), t) => { - let t = t.normalize_ctx(ctx).embed(); - let x = x.normalize_ctx(ctx).embed(); + let t = t.normalize().embed(); + let x = x.normalize().embed(); let e = dhall::subexpr!(Some x : Optional t); Ok(RetType(type_with(ctx, e)?.get_type()?.into_owned())) } @@ -702,7 +707,7 @@ fn type_last_layer( let mut kts: std::collections::BTreeMap<_, _> = kvs .into_iter() .map(|(x, v)| { - let t = v.map(|x| x.normalize_ctx(ctx).embed()); + let t = v.map(|x| x.normalize().embed()); Ok((x, t)) }) .collect::<Result<_, _>>()?; @@ -716,7 +721,7 @@ fn type_last_layer( None => Err(mkerr(MissingRecordField(x, r))), }, _ => { - let r = r.normalize_ctx(ctx); + let r = r.normalize(); match r.as_expr().as_ref() { UnionType(kts) => match kts.get(&x) { // Constructor has type T -> < x: T, ... > |