input_dsl: cleanup commented code

dsl/src/dsl_iter.rs

@@ -14,7 +14,10 @@ use crate::*;
 /// Provides a native [Iterator] API over the [ConstIntoIter] [SourceIter]
 /// [TokenIter::next] returns just the [Token] and mutates `self`,
 /// instead of returning an updated version of the struct as [SourceIter::next] does.
-#[derive(Copy, Clone, Debug, Default, PartialEq)] pub struct TokenIter<'a>(pub SourceIter<'a>);
+#[derive(Copy, Clone, Debug, Default, PartialEq)] pub struct TokenIter<'a>(
+    pub SourceIter<'a>
+);
+
 impl<'a> TokenIter<'a> {
     pub const fn new (source: &'a str) -> Self {
         Self(SourceIter::new(source))
@@ -31,6 +34,12 @@ impl<'a> Iterator for TokenIter<'a> {
     }
 }
 
+impl<'a> From<SourceIter<'a>> for TokenIter<'a> {
+    fn from (source: SourceIter<'a>) -> Self{
+        Self(source)
+    }
+}
+
 /// Owns a reference to the source text.
 /// [SourceIter::next] emits subsequent pairs of:
 ///   * a [Token] and

input/src/input_dsl.rs

@@ -74,7 +74,7 @@ impl<'a, S, C: DslCommand<'a, S>, I: DslInput> KeyMap<'a, S, C, I> for TokenIter
 /// which may be made available subject to given conditions.
 pub struct InputMap<'a, S, C: DslCommand<'a, S>, I: DslInput, M: KeyMap<'a, S, C, I> + Send + Sync> {
     __: &'a PhantomData<(S, C, I)>,
-    layers: Vec<(
+    pub layers: Vec<(
         fn(&S)->bool,
         M
     )>,
@@ -152,37 +152,3 @@ where
         None
     }
 }
-
-    //fn handle <C> (&self, state: &mut T, input: &U) -> Perhaps<bool> {
-        //for layer in self.layers.iter() {
-            //if !(layer.0)(state) {
-                //continue
-            //}
-            //let command: Option<C> = SourceIter(layer.1).command::<_, _, _>(state, input);
-            //if let Some(command) = command {
-                //if let Some(undo) = command.execute(state)? {
-                    ////app.history.push(undo);
-                //}
-                //return Ok(Some(true))
-            //}
-        //}
-        //Ok(None)
-    //}
-//}
-    //fn layer (mut self, keymap: &'static str) -> Self {
-        //self.add_layer(keymap);
-        //self
-    //}
-    //fn layer_if (mut self, condition: impl Fn(&T)->bool + 'static, keymap: &'static str) -> Self {
-        //self.add_layer_if(condition, keymap);
-        //self
-    //}
-    //fn add_layer (&mut self, keymap: &'static str) -> &mut Self {
-        //self.layers.push((Box::new(|_|true), keymap));
-        //self
-    //}
-    //fn add_layer_if (&mut self, condition: impl Fn(&T)->bool + 'static, keymap: &'static str) -> &mut Self {
-        //self.layers.push((Box::new(condition), keymap));
-        //self
-    //}
-//}