From 1f1f589dd43ad9ede24beb12be3a257ba4570861 Mon Sep 17 00:00:00 2001
From: Daniel M <daniel.q.mueller@stud.h-da.de>
Date: Fri, 28 Jan 2022 14:55:10 +0100
Subject: [PATCH] Lex true/false as 1/0

---
 src/lexer.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/lexer.rs b/src/lexer.rs
index 994ba27..22afe1b 100644
--- a/src/lexer.rs
+++ b/src/lexer.rs
@@ -123,6 +123,23 @@ impl<'a> Lexer<'a> {
                 '(' => tokens.push(Token::LParen),
                 ')' => tokens.push(Token::RParen),
 
+                'a'..='z' | 'A'..='Z' | '_' => {
+                    let mut ident = String::from(ch);
+
+                    // Do as long as a next char exists and it is a valid ident char
+                    while let Some('a'..='z' | 'A'..='Z' | '_' | '0'..='9') = self.peek() {
+                        // The next char is verified to be Some, so unwrap is safe
+                        ident.push(self.next().unwrap());
+                    }
+
+                    match ident.as_str() {
+                        "true" => tokens.push(Token::I64(1)),
+                        "false" => tokens.push(Token::I64(0)),
+                        _ => panic!("Lexer encountered unknown ident: '{}'", ident),
+                    }
+
+                }
+
                 //TODO: Don't panic, keep calm
                 _ => panic!("Lexer encountered unexpected char: '{}'", ch),
             }