edn -> dsl

output/src/op_cond.rs

@@ -1,10 +1,14 @@
 use crate::*;
+
 /// Show an item only when a condition is true.
 pub struct When<A>(pub bool, pub A);
 impl<A> When<A> { #[inline] pub fn new (c: bool, a: A) -> Self { Self(c, a) } }
+
 /// Show one item if a condition is true and another if the condition is false
 pub struct Either<A, B>(pub bool, pub A, pub B);
 impl<A, B> Either<A, B> { #[inline] pub fn new (c: bool, a: A, b: B) -> Self { Self(c, a, b) } }
+
+#[cfg(feature = "dsl")]
 try_from_expr!(<'a, E>: When<RenderBox<'a, E>>: |state, iter| {
     if let Some(Token { value: Value::Key("when"), .. }) = iter.peek() {
         let _ = iter.next().unwrap();
@@ -15,6 +19,8 @@ try_from_expr!(<'a, E>: When<RenderBox<'a, E>>: |state, iter| {
         return Some(Self(condition, content))
     }
 });
+
+#[cfg(feature = "dsl")]
 try_from_expr!(<'a, E>: Either<RenderBox<'a, E>, RenderBox<'a, E>>: |state, iter| {
     if let Some(Token { value: Value::Key("either"), .. }) = iter.peek() {
         let _ = iter.next().unwrap();
@@ -27,6 +33,7 @@ try_from_expr!(<'a, E>: Either<RenderBox<'a, E>, RenderBox<'a, E>>: |state, iter
         return Some(Self(condition, content, alternate))
     }
 });
+
 impl<E: Output, A: Render<E>> Content<E> for When<A> {
     fn layout (&self, to: E::Area) -> E::Area {
         let Self(cond, item) = self;
@@ -45,6 +52,7 @@ impl<E: Output, A: Render<E>> Content<E> for When<A> {
         if *cond { item.render(to) }
     }
 }
+
 impl<E: Output, A: Render<E>, B: Render<E>> Content<E> for Either<A, B> {
     fn layout (&self, to: E::Area) -> E::Area {
         let Self(cond, a, b) = self;