diff options
Diffstat (limited to 'dhall/src/semantics')
| -rw-r--r-- | dhall/src/semantics/core/value.rs | 47 |
1 files changed, 22 insertions, 25 deletions
diff --git a/dhall/src/semantics/core/value.rs b/dhall/src/semantics/core/value.rs index 0fda870..f6d273c 100644 --- a/dhall/src/semantics/core/value.rs +++ b/dhall/src/semantics/core/value.rs @@ -412,33 +412,30 @@ impl ValueInternal { } fn normalize_whnf(&mut self) { - take_mut::take_or_recover( - self, - // Dummy value in case the other closure panics - || ValueInternal { - form: Unevaled, - kind: ValueKind::Const(Const::Type), - ty: None, - span: Span::Artificial, + let dummy = ValueInternal { + form: Unevaled, + kind: ValueKind::Const(Const::Type), + ty: None, + span: Span::Artificial, + }; + let vint = std::mem::replace(self, dummy); + *self = match (&vint.form, &vint.ty) { + (Unevaled, Some(ty)) => ValueInternal { + form: WHNF, + kind: normalize_whnf(vint.kind, &ty), + ty: vint.ty, + span: vint.span, }, - |vint| match (&vint.form, &vint.ty) { - (Unevaled, Some(ty)) => ValueInternal { - form: WHNF, - kind: normalize_whnf(vint.kind, &ty), - ty: vint.ty, - span: vint.span, - }, - // `value` is `Sort` - (Unevaled, None) => ValueInternal { - form: NF, - kind: ValueKind::Const(Const::Sort), - ty: None, - span: vint.span, - }, - // Already in WHNF - (WHNF, _) | (NF, _) => vint, + // `value` is `Sort` + (Unevaled, None) => ValueInternal { + form: NF, + kind: ValueKind::Const(Const::Sort), + ty: None, + span: vint.span, }, - ) + // Already in WHNF + (WHNF, _) | (NF, _) => vint, + } } fn normalize_nf(&mut self) { match self.form { |