parser: support clone expressions

trunk_lexer/src/lexer.rs

@@ -695,6 +695,7 @@ fn identifier_to_keyword(ident: &str) -> Option<TokenKind> {
         "as" => TokenKind::As,
         "break" => TokenKind::Break,
         "class" => TokenKind::Class,
+        "clone" => TokenKind::Clone,
         "continue" => TokenKind::Continue,
         "const" => TokenKind::Const,
         "declare" => TokenKind::Declare,

trunk_parser/src/ast.rs

@@ -284,6 +284,7 @@ pub enum Expression {
     MagicConst(MagicConst),
     Ternary(Box<Self>, Box<Self>, Box<Self>),
     Coalesce(Box<Self>, Box<Self>),
+    Clone(Box<Self>)
 }
 
 #[derive(Debug, Eq, PartialEq, Clone, Serialize)]

trunk_parser/src/parser/mod.rs

@@ -718,6 +718,15 @@ impl Parser {
         }
 
         let mut lhs = match &self.current.kind {
+            TokenKind::Clone => {
+                self.next();
+
+                let target = self.expression(0)?;
+
+                dbg!(&self.current.kind);
+
+                Expression::Clone(Box::new(target))
+            },
             TokenKind::Variable(v) => {
                 let e = Expression::Variable(v.to_string());
                 self.next();