Most files suffered major changes

- Less ambiguous syntax
- Better parser (Chumsky only does tokenization now)
- Tidy(|ier) error handling
- Facade for simplified embedding
- External code grouped in (fairly) self-contained Systems
- Dynamic action dispatch
- Many STL additions

src/rule/matcher_vectree/build.rs

@@ -112,7 +112,7 @@ fn mk_scalar(pattern: &RuleExpr) -> ScalMatcher {
     },
     Clause::S(c, body) => ScalMatcher::S(*c, Box::new(mk_any(body))),
     Clause::Lambda(arg, body) =>
-      ScalMatcher::Lambda(Box::new(mk_scalar(arg)), Box::new(mk_any(body))),
+      ScalMatcher::Lambda(Box::new(mk_any(arg)), Box::new(mk_any(body))),
   }
 }
 

src/rule/matcher_vectree/scal_match.rs

@@ -16,7 +16,7 @@ pub fn scal_match<'a>(
     (ScalMatcher::S(c1, b_mat), Clause::S(c2, body)) if c1 == c2 =>
       any_match(b_mat, &body[..]),
     (ScalMatcher::Lambda(arg_mat, b_mat), Clause::Lambda(arg, body)) => {
-      let mut state = scal_match(arg_mat, arg)?;
+      let mut state = any_match(arg_mat, arg)?;
       state.extend(any_match(b_mat, body)?);
       Some(state)
     },

src/rule/matcher_vectree/shared.rs

@@ -14,7 +14,7 @@ pub enum ScalMatcher {
   P(Primitive),
   Name(Sym),
   S(char, Box<AnyMatcher>),
-  Lambda(Box<ScalMatcher>, Box<AnyMatcher>),
+  Lambda(Box<AnyMatcher>, Box<AnyMatcher>),
   Placeh(Tok<String>),
 }