From 726c281cdd3824fcfdde34fe8d01f95416f7808c Mon Sep 17 00:00:00 2001
From: Nadrieril
Date: Tue, 7 May 2019 16:01:24 +0200
Subject: Clean up some of the SubExpr type-changing methods

---
 dhall_syntax/src/core.rs | 40 +++++++++++-----------------------------
 1 file changed, 11 insertions(+), 29 deletions(-)

(limited to 'dhall_syntax/src/core.rs')

diff --git a/dhall_syntax/src/core.rs b/dhall_syntax/src/core.rs
index 7cdda64..2b76b9a 100644
--- a/dhall_syntax/src/core.rs
+++ b/dhall_syntax/src/core.rs
@@ -343,15 +343,11 @@ impl<N, E> Expr<N, E> {
     {
         trivial_result(self.traverse_embed(|x| Ok(map_embed(x))))
     }
+}
 
-    pub fn squash_embed<E2>(
-        &self,
-        f: impl FnMut(&E) -> SubExpr<N, E2>,
-    ) -> SubExpr<N, E2>
-    where
-        N: Clone,
-    {
-        trivial_result(self.visit(&mut visitor::SquashEmbedVisitor(f)))
+impl Expr<X, X> {
+    pub fn absurd<N, E>(&self) -> Expr<N, E> {
+        self.visit(&mut visitor::AbsurdVisitor)
     }
 }
 
@@ -361,12 +357,6 @@ impl<E: Clone> Expr<X, E> {
     }
 }
 
-impl<N: Clone> Expr<N, X> {
-    pub fn embed_absurd<E>(&self) -> Expr<N, E> {
-        self.visit(&mut visitor::EmbedAbsurdVisitor)
-    }
-}
-
 impl<N, E> SubExpr<N, E> {
     pub fn as_ref(&self) -> &Expr<N, E> {
         &self.0.as_ref().0
@@ -380,17 +370,6 @@ impl<N, E> SubExpr<N, E> {
         SubExpr(Rc::new((x, None)))
     }
 
-    pub fn unnote(&self) -> SubExpr<X, E>
-    where
-        E: Clone,
-    {
-        SubExpr::from_expr_no_note(
-            self.as_ref().visit(&mut visitor::UnNoteVisitor),
-        )
-    }
-}
-
-impl<N: Clone, E> SubExpr<N, E> {
     pub fn rewrap<E2>(&self, x: Expr<N, E2>) -> SubExpr<N, E2>
     where
         N: Clone,
@@ -422,7 +401,10 @@ impl<N: Clone, E> SubExpr<N, E> {
         &'a self,
         map_expr: impl FnMut(&'a Self) -> Self,
         map_under_binder: impl FnMut(&'a Label, &'a Self) -> Self,
-    ) -> Self {
+    ) -> Self
+    where
+        N: Clone,
+    {
         match self.as_ref() {
             ExprF::Embed(_) => SubExpr::clone(self),
             // This calls ExprF::map_ref
@@ -436,9 +418,9 @@ impl<N: Clone, E> SubExpr<N, E> {
     }
 }
 
-impl<N: Clone> SubExpr<N, X> {
-    pub fn embed_absurd<T>(&self) -> SubExpr<N, T> {
-        self.rewrap(self.as_ref().embed_absurd())
+impl SubExpr<X, X> {
+    pub fn absurd<N: Clone, T>(&self) -> SubExpr<N, T> {
+        SubExpr::from_expr_no_note(self.as_ref().absurd())
     }
 }
 
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