Implement line comments

README.md

@@ -42,7 +42,7 @@
   - [ ] If else statement `if X { ... } else { ... }`
     - [ ] If Statement
     - [ ] Else statement
-- [ ] Line comments `//`
+- [x] Line comments `//`
 - [ ] Strings
 - [ ] IO Intrinsics
   - [ ] Print

src/lexer.rs

@@ -129,6 +129,8 @@ impl<'a> Lexer<'a> {
                     self.next();
                     tokens.push(Token::LArrow);
                 }
+                // Line comment. Consume every char until linefeed (next line)
+                '/' if matches!(self.peek(), '/') => while self.next() != '\n' {},
 
                 ';' => tokens.push(Token::Semicolon),
                 '+' => tokens.push(Token::Add),

src/main.rs

@@ -1,5 +1,3 @@
-use std::io::Write;
-
 use nek_lang::{lexer::lex, parser::parse, interpreter::Interpreter};
 
 
@@ -10,6 +8,7 @@ fn main() {
     // let mut code = String::new();
     let code = "
         a <- 5;
+        // nek-lang best lang
         a * 2;
     ";