Lex and parse bool literals

src/lexer.rs

@@ -54,6 +54,10 @@ pub enum Token {
     #[token("==")] OpEq,
     #[token("!=")] OpNeq,
 
+    // boolean literals
+    #[token("true")]  True,
+    #[token("false")] False,
+
     #[regex(r"[a-zA-Z_][a-zA-Z0-9_]*")]
     Identifier,
 

src/parse.rs

@@ -299,6 +299,8 @@ impl<'a> Expr<'a> {
             Token::OctalInteger => Self::Literal(Literal::OctalInteger(lexer.slice())),
             Token::HexInteger => Self::Literal(Literal::HexInteger(lexer.slice())),
             Token::DecimalInteger => Self::Literal(Literal::DecimalInteger(lexer.slice())),
+            Token::True => Self::Literal(Literal::Boolean(true)),
+            Token::False => Self::Literal(Literal::Boolean(false)),
             Token::Semicolon | Token::BraceClose | Token::ParanClose => return (None, tok),
             _ => lexer.panic_message("Unexpected token"),
         };
@@ -390,6 +392,7 @@ pub enum Literal<'a> {
     OctalInteger(&'a str),
     HexInteger(&'a str),
     DecimalInteger(&'a str),
+    Boolean(bool),
 }
 
 #[derive(Debug)]