implement `==`

1 files changed, 5 insertions, 1 deletions

diff --git a/src/Lexer.zig b/src/Lexer.zig
index 19e9cd4..64457bf 100644
--- a/src/Lexer.zig
+++ b/src/Lexer.zig
@@ -13,6 +13,7 @@ pub const Token = struct {
         plus,
         minus,
         equal,
+        equal_equal,
         colon,
         invalid,
         eof,
@@ -85,7 +86,10 @@ fn getNext(self: *Self) Token {
         '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' => self.integerLiteral(),
         '+' => self.create(.plus),
         '-' => self.create(.minus),
-        '=' => self.create(.equal),
+        '=' => if (self.eatIfEqual('='))
+            self.create(.equal_equal)
+        else
+            self.create(.equal),
         ':' => self.create(.colon),
         ',' => self.create(.comma),
         '<' => if (self.eatIfEqual('='))