feat: Add support for loop statements.

src/ast.rs

@@ -73,6 +73,10 @@ pub enum Statement {
         elze: Option<Box<Statement>>,
     },
 
+    Loop {
+        body: Box<Statement>,
+    },
+
     Compound {
         body: Vec<Statement>,
     },

src/main.rs

@@ -5,7 +5,7 @@ pub mod parser;
 pub mod token;
 
 fn main() {
-    let mut parser = Parser::new("if a < 12 { let b = 10; } else { let c = 20; }");
+    let mut parser = Parser::new("loop {}");
 
     println!("{:#?}", parser.parse_statement());
 }

src/parser.rs

@@ -60,6 +60,7 @@ impl<'src> Parser<'src> {
         match self.peek_no_eof()?.kind {
             TokenKind::KwLet => self.parse_let_statement(),
             TokenKind::KwIf => self.parse_if_statement(),
+            TokenKind::KwLoop => self.parse_loop_statement(),
 
             _ => {
                 let expr = self.parse_expression(0)?;
@@ -69,6 +70,14 @@ impl<'src> Parser<'src> {
         }
     }
 
+    fn parse_loop_statement(&mut self) -> ParserResult<Statement> {
+        self.expect(&[TokenKind::KwLoop])?;
+
+        let body = Box::new(self.parse_compound_statement()?);
+
+        Ok(Statement::Loop { body })
+    }
+
     fn parse_if_statement(&mut self) -> ParserResult<Statement> {
         self.expect(&[TokenKind::KwIf])?;