Replace generic list AST with typed expression tree

Each form (fn, let, for, set, do, call) now has its own variant with named fields instead of being a
plain list.

1 files changed, 7 insertions, 4 deletions

diff --git a/compiler/src/ast/error.rs b/compiler/src/ast/error.rs
index 38b3916..5598376 100644
--- a/compiler/src/ast/error.rs
+++ b/compiler/src/ast/error.rs
@@ -10,8 +10,10 @@ pub enum Error {
     UnexpectedEscapeChar(char),
 
     // Par
-    UnexpectedRightPar,
-    UnclosedLeftPar,
+    UnexpectedClosePar,
+    UnclosedPar,
+
+    UnexpectedToken,
 
     UnexpectedEof,
 
@@ -26,8 +28,9 @@ impl fmt::Display for Error {
             }
             Error::UnclosedString(string) => write!(f, "unclosed string {string:?}"),
             Error::UnexpectedEscapeChar(ch) => write!(f, "unexpected escape char {ch:?}"),
-            Error::UnexpectedRightPar => write!(f, "unexpected right par"),
-            Error::UnclosedLeftPar => write!(f, "unclosed left par"),
+            Error::UnexpectedClosePar => write!(f, "unexpected `)`"),
+            Error::UnclosedPar => write!(f, "unclosed `(`"),
+            Error::UnexpectedToken => write!(f, "unexpected token"),
             Error::UnexpectedEof => write!(f, "unexpected eof"),
             Error::RecursionLimit => write!(f, "recursion limit"),
         }