added some conversions

src/interpreter/value/mod.rs

@@ -6,6 +6,7 @@ pub use function::Function;
 pub use pair::DotPair;
 pub use string::Str;
 
+use crate::syntax::ast::{Expr, Spanned};
 use std::{collections::BTreeMap, rc::Rc};
 
 pub type OrderedF64 = ordered_float::OrderedFloat<f64>;
@@ -23,3 +24,27 @@ pub enum Value<'s> {
     Macro(Function),
     Nil,
 }
+
+impl<'s> From<Spanned<Expr<'s>>> for Value<'s> {
+    fn from(e: Spanned<Expr<'s>>) -> Self {
+        e.item.into()
+    }
+}
+
+impl<'s> From<Expr<'s>> for Value<'s> {
+    fn from(e: Expr<'s>) -> Self {
+        match e {
+            Expr::List(_) => todo!(),
+            Expr::Vector(v) => Self::Vector(Rc::new(v.into_iter().map(Into::into).collect())),
+            Expr::Pair((l, r)) => Self::DotPair(Rc::new(DotPair((*l).into(), (*r).into()))),
+            Expr::Quote(e) => Self::DotPair(Rc::new(DotPair(
+                Self::Symbol("quote".into()),
+                Self::DotPair(Rc::new(DotPair((*e).into(), Self::Nil))),
+            ))),
+            Expr::Symbol(s) => Self::Symbol(s.into()),
+            Expr::Keyword(s) => Self::Keyword(s.into()),
+            Expr::Number(n) => Self::Number(n),
+            Expr::String(s) => Self::String(s.into()),
+        }
+    }
+}