lexer: add more token cases

1 files changed, 21 insertions, 0 deletions

diff --git a/src/lexer.cc b/src/lexer.cc
index 96c5df9..50c815e 100644
--- a/src/lexer.cc
+++ b/src/lexer.cc
@@ -134,6 +134,27 @@ Lexer::scan_token(void)
     add_token(STAR);
     break;
 
+  case '!':
+    add_token(match('=') ? BANG_EQUAL : BANG);
+    break;
+  case '=':
+    add_token(match('=') ? EQUAL_EQUAL : EQUAL);
+    break;
+  case '<':
+    add_token(match('=') ? LESS_EQUAL : LESS);
+    break;
+  case '>':
+    add_token(match('=') ? GREATER_EQUAL : GREATER);
+    break;
+
+  case '/':
+    if (match('/'))
+      while (peek() != '\n' && !at_end())
+        advance();
+    else
+      add_token(SLASH);
+    break;
+
   case '\n':
     m_line++;
     break;