rewrite zern tokenizer in zern :)

src/std.zr

@@ -424,6 +424,14 @@ func array.free[xs: array] : void
         mem.free(data)
     mem.free(xs)
 
+func array.pop[xs: array] : i64
+    let size: i64 = array.size(xs)
+    if size == 0
+        dbg.panic("array.pop on empty array")
+    let x: i64 = array.nth(xs, size - 1)
+    mem.write64(xs + 16, size - 1)
+    return x
+
 func array.slice[xs: array, start: i64, length: i64] : array
     if start < 0 | length < 0 | start + length > array.size(xs)
         dbg.panic("array.slice out of bounds")

src/tokenizer.rs

@@ -314,16 +314,6 @@ impl Tokenizer {
             while self.peek().is_ascii_digit() {
                 self.advance();
             }
-
-            if self.peek() == '.'
-                && self.current + 1 < self.source.len()
-                && self.source[self.current + 1].is_ascii_digit()
-            {
-                self.advance();
-                while self.peek().is_ascii_digit() {
-                    self.advance();
-                }
-            }
         }
 
         self.add_token(TokenType::Number);