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-rw-r--r--dhall_syntax/src/core/expr.rs110
-rw-r--r--dhall_syntax/src/core/visitor.rs60
-rw-r--r--dhall_syntax/src/printer.rs2
3 files changed, 44 insertions, 128 deletions
diff --git a/dhall_syntax/src/core/expr.rs b/dhall_syntax/src/core/expr.rs
index e08d816..74eb993 100644
--- a/dhall_syntax/src/core/expr.rs
+++ b/dhall_syntax/src/core/expr.rs
@@ -245,92 +245,62 @@ impl<SE, E> ExprF<SE, E> {
v.visit(self)
}
- pub fn traverse_ref_with_special_handling_of_binders<'a, SE2, E2, Err>(
+ pub fn traverse_ref_with_special_handling_of_binders<'a, SE2, Err>(
&'a self,
visit_subexpr: impl FnMut(&'a SE) -> Result<SE2, Err>,
visit_under_binder: impl FnOnce(&'a Label, &'a SE) -> Result<SE2, Err>,
- visit_embed: impl FnOnce(&'a E) -> Result<E2, Err>,
- ) -> Result<ExprF<SE2, E2>, Err> {
+ ) -> Result<ExprF<SE2, E>, Err>
+ where
+ E: Clone,
+ {
self.visit(visitor::TraverseRefWithBindersVisitor {
visit_subexpr,
visit_under_binder,
- visit_embed,
})
}
- fn traverse_ref<'a, SE2, E2, Err>(
+ fn traverse_ref<'a, SE2, Err>(
&'a self,
visit_subexpr: impl FnMut(&'a SE) -> Result<SE2, Err>,
- visit_embed: impl FnOnce(&'a E) -> Result<E2, Err>,
- ) -> Result<ExprF<SE2, E2>, Err> {
- self.visit(visitor::TraverseRefVisitor {
- visit_subexpr,
- visit_embed,
- })
+ ) -> Result<ExprF<SE2, E>, Err>
+ where
+ E: Clone,
+ {
+ self.visit(visitor::TraverseRefVisitor { visit_subexpr })
}
- pub fn map_ref_with_special_handling_of_binders<'a, SE2, E2>(
+ pub fn map_ref_with_special_handling_of_binders<'a, SE2>(
&'a self,
mut map_subexpr: impl FnMut(&'a SE) -> SE2,
mut map_under_binder: impl FnMut(&'a Label, &'a SE) -> SE2,
- map_embed: impl FnOnce(&'a E) -> E2,
- ) -> ExprF<SE2, E2> {
+ ) -> ExprF<SE2, E>
+ where
+ E: Clone,
+ {
trivial_result(self.traverse_ref_with_special_handling_of_binders(
|x| Ok(map_subexpr(x)),
|l, x| Ok(map_under_binder(l, x)),
- |x| Ok(map_embed(x)),
))
}
- pub fn map_ref<'a, SE2, E2>(
+ pub fn map_ref<'a, SE2>(
&'a self,
mut map_subexpr: impl FnMut(&'a SE) -> SE2,
- map_embed: impl FnOnce(&'a E) -> E2,
- ) -> ExprF<SE2, E2> {
- trivial_result(
- self.traverse_ref(|x| Ok(map_subexpr(x)), |x| Ok(map_embed(x))),
- )
- }
-
- pub fn traverse_ref_simple<'a, SE2, Err>(
- &'a self,
- visit_subexpr: impl FnMut(&'a SE) -> Result<SE2, Err>,
- ) -> Result<ExprF<SE2, E>, Err>
- where
- E: Clone,
- {
- self.traverse_ref(visit_subexpr, |x| Ok(E::clone(x)))
- }
-
- pub fn map_ref_simple<'a, SE2>(
- &'a self,
- map_subexpr: impl Fn(&'a SE) -> SE2,
) -> ExprF<SE2, E>
where
E: Clone,
{
- self.map_ref(map_subexpr, E::clone)
+ trivial_result(self.traverse_ref(|x| Ok(map_subexpr(x))))
}
}
-impl<E> Expr<E> {
- fn traverse_embed<E2, Err>(
- &self,
- visit_embed: impl FnMut(&E) -> Result<E2, Err>,
- ) -> Result<Expr<E2>, Err> {
- self.visit(&mut visitor::TraverseEmbedVisitor(visit_embed))
- }
-
- fn map_embed<E2>(&self, mut map_embed: impl FnMut(&E) -> E2) -> Expr<E2> {
- trivial_result(self.traverse_embed(|x| Ok(map_embed(x))))
- }
-
+impl Expr<Import> {
pub fn traverse_resolve<E2, Err>(
&self,
- visit_embed: impl FnMut(&E) -> Result<E2, Err>,
+ visit_import: impl FnMut(&Import) -> Result<E2, Err>,
) -> Result<Expr<E2>, Err> {
self.traverse_resolve_with_visitor(&mut visitor::ResolveVisitor(
- visit_embed,
+ visit_import,
))
}
@@ -339,7 +309,7 @@ impl<E> Expr<E> {
visitor: &mut visitor::ResolveVisitor<F1>,
) -> Result<Expr<E2>, Err>
where
- F1: FnMut(&E) -> Result<E2, Err>,
+ F1: FnMut(&Import) -> Result<E2, Err>,
{
match self {
ExprF::BinOp(BinOp::ImportAlt, l, r) => l
@@ -371,42 +341,14 @@ impl<E> SubExpr<E> {
pub fn rewrap<E2>(&self, x: Expr<E2>) -> SubExpr<E2> {
SubExpr(Rc::new((x, (self.0).1.clone())))
}
+}
- pub fn traverse_embed<E2, Err>(
- &self,
- visit_embed: impl FnMut(&E) -> Result<E2, Err>,
- ) -> Result<SubExpr<E2>, Err> {
- Ok(self.rewrap(self.as_ref().traverse_embed(visit_embed)?))
- }
-
- pub fn map_embed<E2>(
- &self,
- map_embed: impl FnMut(&E) -> E2,
- ) -> SubExpr<E2> {
- self.rewrap(self.as_ref().map_embed(map_embed))
- }
-
- pub fn map_subexprs_with_special_handling_of_binders<'a>(
- &'a self,
- map_expr: impl FnMut(&'a Self) -> Self,
- map_under_binder: impl FnMut(&'a Label, &'a Self) -> Self,
- ) -> Self {
- match self.as_ref() {
- ExprF::Embed(_) => SubExpr::clone(self),
- // This calls ExprF::map_ref
- e => self.rewrap(e.map_ref_with_special_handling_of_binders(
- map_expr,
- map_under_binder,
- |_| unreachable!(),
- )),
- }
- }
-
+impl SubExpr<Import> {
pub fn traverse_resolve<E2, Err>(
&self,
- visit_embed: impl FnMut(&E) -> Result<E2, Err>,
+ visit_import: impl FnMut(&Import) -> Result<E2, Err>,
) -> Result<SubExpr<E2>, Err> {
- Ok(self.rewrap(self.as_ref().traverse_resolve(visit_embed)?))
+ Ok(self.rewrap(self.as_ref().traverse_resolve(visit_import)?))
}
}
diff --git a/dhall_syntax/src/core/visitor.rs b/dhall_syntax/src/core/visitor.rs
index e39e95b..647f76f 100644
--- a/dhall_syntax/src/core/visitor.rs
+++ b/dhall_syntax/src/core/visitor.rs
@@ -278,21 +278,18 @@ where
}
}
-pub struct TraverseRefWithBindersVisitor<F1, F2, F4> {
+pub struct TraverseRefWithBindersVisitor<F1, F2> {
pub visit_subexpr: F1,
pub visit_under_binder: F2,
- pub visit_embed: F4,
}
-impl<'a, SE, E, SE2, E2, Err, F1, F2, F4>
- ExprFFallibleVisitor<'a, SE, SE2, E, E2>
- for TraverseRefWithBindersVisitor<F1, F2, F4>
+impl<'a, SE, E, SE2, Err, F1, F2> ExprFFallibleVisitor<'a, SE, SE2, E, E>
+ for TraverseRefWithBindersVisitor<F1, F2>
where
SE: 'a,
- E: 'a,
+ E: 'a + Clone,
F1: FnMut(&'a SE) -> Result<SE2, Err>,
F2: FnOnce(&'a Label, &'a SE) -> Result<SE2, Err>,
- F4: FnOnce(&'a E) -> Result<E2, Err>,
{
type Error = Err;
@@ -306,68 +303,45 @@ where
) -> Result<SE2, Self::Error> {
(self.visit_under_binder)(label, subexpr)
}
- fn visit_embed(self, embed: &'a E) -> Result<E2, Self::Error> {
- (self.visit_embed)(embed)
+ fn visit_embed(self, embed: &'a E) -> Result<E, Self::Error> {
+ Ok(embed.clone())
}
}
-pub struct TraverseRefVisitor<F1, F3> {
+pub struct TraverseRefVisitor<F1> {
pub visit_subexpr: F1,
- pub visit_embed: F3,
}
-impl<'a, SE, E, SE2, E2, Err, F1, F3> ExprFFallibleVisitor<'a, SE, SE2, E, E2>
- for TraverseRefVisitor<F1, F3>
+impl<'a, SE, E, SE2, Err, F1> ExprFFallibleVisitor<'a, SE, SE2, E, E>
+ for TraverseRefVisitor<F1>
where
SE: 'a,
- E: 'a,
+ E: 'a + Clone,
F1: FnMut(&'a SE) -> Result<SE2, Err>,
- F3: FnOnce(&'a E) -> Result<E2, Err>,
{
type Error = Err;
fn visit_subexpr(&mut self, subexpr: &'a SE) -> Result<SE2, Self::Error> {
(self.visit_subexpr)(subexpr)
}
- fn visit_embed(self, embed: &'a E) -> Result<E2, Self::Error> {
- (self.visit_embed)(embed)
- }
-}
-
-pub struct TraverseEmbedVisitor<F1>(pub F1);
-
-impl<'a, 'b, E, E2, Err, F1>
- ExprFFallibleVisitor<'a, SubExpr<E>, SubExpr<E2>, E, E2>
- for &'b mut TraverseEmbedVisitor<F1>
-where
- F1: FnMut(&E) -> Result<E2, Err>,
-{
- type Error = Err;
-
- fn visit_subexpr(
- &mut self,
- subexpr: &'a SubExpr<E>,
- ) -> Result<SubExpr<E2>, Self::Error> {
- Ok(subexpr.rewrap(subexpr.as_ref().visit(&mut **self)?))
- }
- fn visit_embed(self, embed: &'a E) -> Result<E2, Self::Error> {
- (self.0)(embed)
+ fn visit_embed(self, embed: &'a E) -> Result<E, Self::Error> {
+ Ok(embed.clone())
}
}
pub struct ResolveVisitor<F1>(pub F1);
-impl<'a, 'b, E, E2, Err, F1>
- ExprFFallibleVisitor<'a, SubExpr<E>, SubExpr<E2>, E, E2>
+impl<'a, 'b, E2, Err, F1>
+ ExprFFallibleVisitor<'a, SubExpr<Import>, SubExpr<E2>, Import, E2>
for &'b mut ResolveVisitor<F1>
where
- F1: FnMut(&E) -> Result<E2, Err>,
+ F1: FnMut(&Import) -> Result<E2, Err>,
{
type Error = Err;
fn visit_subexpr(
&mut self,
- subexpr: &'a SubExpr<E>,
+ subexpr: &'a SubExpr<Import>,
) -> Result<SubExpr<E2>, Self::Error> {
Ok(subexpr.rewrap(
subexpr
@@ -375,7 +349,7 @@ where
.traverse_resolve_with_visitor(&mut **self)?,
))
}
- fn visit_embed(self, embed: &'a E) -> Result<E2, Self::Error> {
+ fn visit_embed(self, embed: &'a Import) -> Result<E2, Self::Error> {
(self.0)(embed)
}
}
diff --git a/dhall_syntax/src/printer.rs b/dhall_syntax/src/printer.rs
index 25d4ca8..48e56be 100644
--- a/dhall_syntax/src/printer.rs
+++ b/dhall_syntax/src/printer.rs
@@ -156,7 +156,7 @@ impl<A: Display + Clone> Expr<A> {
};
// Annotate subexpressions with the appropriate phase, defaulting to Base
- let phased_self = match self.map_ref_simple(|e| PhasedExpr(e, Base)) {
+ let phased_self = match self.map_ref(|e| PhasedExpr(e, Base)) {
Pi(a, b, c) => {
if &String::from(&a) == "_" {
Pi(a, b.phase(Operator), c)
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 05:05:35 +0000