ast: Remove unary hash operator to reserve the symbol for use in attribute parsing

libconlang/src/ast.rs

@@ -367,8 +367,6 @@ pub enum UnaryKind {
     /// Unused
     At,
     /// Unused
-    Hash,
-    /// Unused
     Tilde,
 }
 

libconlang/src/ast/ast_impl.rs

@@ -367,7 +367,6 @@ mod display {
                 UnaryKind::Neg => "-",
                 UnaryKind::Not => "!",
                 UnaryKind::At => "@",
-                UnaryKind::Hash => "#",
                 UnaryKind::Tilde => "~",
             }
             .fmt(f)

libconlang/src/interpreter.rs

@@ -551,8 +551,7 @@ pub mod interpret {
                     UnaryKind::Deref => todo!("Deref operator"),
                     UnaryKind::Neg => (-operand)?,
                     UnaryKind::Not => (!operand)?,
-                    UnaryKind::At => unimplemented!("At operator"),
-                    UnaryKind::Hash => {
+                    UnaryKind::At => {
                         println!("{operand}");
                         operand
                     }

libconlang/src/parser.rs

@@ -1215,7 +1215,6 @@ impl<'t> Parser<'t> {
             Minus => Neg,   // -
             Bang => Not,    // !
             At => At,       // @
-            Hash => Hash,   // #
             Tilde => Tilde, // ~
         };
     }