From d62c58a1956989a5e001f981005b6590039a0fc0 Mon Sep 17 00:00:00 2001
From: Luna <git@l4.pm>
Date: Sat, 1 Jun 2019 17:15:27 -0300
Subject: [PATCH] scanner: add identifiers

---
 src/new_scanner.zig | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/new_scanner.zig b/src/new_scanner.zig
index 2b48f48..340523b 100644
--- a/src/new_scanner.zig
+++ b/src/new_scanner.zig
@@ -150,12 +150,21 @@ pub const Scanner = struct {
         return self.makeToken(.NUMBER);
     }
 
+    fn doIdentifier(self: *Scanner) Token {
+        while (isAlphaNumeric(self.peek())) {
+            _ = self.advance();
+        }
+
+        return self.makeToken(.IDENTIFIER);
+    }
+
     pub fn scanToken(self: *Scanner) !?Token {
         self.skipWhitespace();
         self.start = self.current;
         if (self.isAtEnd()) return self.makeToken(TokenType.EOF);
 
         var c = self.advance();
+        if (isAlpha(c)) return self.doIdentifier();
         if (isDigit(c)) return self.doNumber();
 
         var token = switch (c) {