int and float parsing!

hell yes

src/parsing/lexer.rs

@@ -1,6 +1,10 @@
 use super::preprocessor::preprocess;
 use super::token::Token;
 
+const digits: &str = "0123456789";
+const alphabet: &str = "abcdefghijklmnopqrstuvwxyz";
+const alphabet_c: &str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
 pub struct Lexer {
     code: String,
     pos: usize,
@@ -31,16 +35,27 @@ impl Lexer {
         
         loop {
             let token: Option<Token> = match self.current {
+                // SKIP OR BREAK
+                Some(' ') => None,
+                Some('\n') => None,
+                None => break,
+
+                // OPERATORS
                 Some('+') => Some(Token::ADD),
                 Some('-') => Some(Token::SUBTRACT),
                 Some('*') => Some(Token::MULTIPLY),
                 Some('/') => Some(Token::DIVIDE),
                 Some('(') => Some(Token::LBRACK),
                 Some(')') => Some(Token::RBRACK),
-                Some(' ') => None,
-                Some('\n') => None,
-                None => break,
-                Some(_) => None,
+                
+                // REST
+                Some(c) => {
+                    if digits.contains(c) {
+                        Some(self.make_nr_token())
+                    } else {
+                        None
+                    }
+                },
             };
 
             match token {
@@ -54,4 +69,26 @@ impl Lexer {
 
         println!("{:?}", tokens);
     }
+
+    fn make_nr_token(&mut self) -> Token {
+        let mut nr: String = String::new();
+        let mut dot_amount: u8 = 0;
+
+        while (self.current != None) && (digits.contains(self.current.unwrap()) || self.current.unwrap() == '.') {
+            if self.current.unwrap() == '.' {
+                if dot_amount == 1 {
+                    panic!("Unexpected additional '.' in Number.");
+                }
+                dot_amount += 1;
+            }
+            nr.push(self.current.unwrap());
+            self.next();
+        }
+
+        if dot_amount == 1 {
+            return Token::FLOAT(nr.parse::<f32>().unwrap());
+        } else {
+            return Token::INT(nr.parse::<i32>().unwrap());
+        }
+    }
 }

src/parsing/token.rs

@@ -1,7 +1,7 @@
 #[derive(Debug)]
 pub enum Token {
-    INT,
-    FLOAT,
+    INT(i32),
+    FLOAT(f32),
     ADD,
     SUBTRACT,
     MULTIPLY,