frontend: lexer: Add token for tilde

Signed-off-by: Ian Moffett <ian@mirocom.org>

frontend/lexer.c

@@ -281,6 +281,10 @@ lexer_scan(struct quip_state *state, struct token *tokres)
         lexer_putback(state, c);
         tokres->type = TT_COLON;
         return 0;
+    case '~':
+        tokres->type = TT_TILDE;
+        tokres->c = c;
+        return 0;
     default:
         if (lexer_scan_name(state, c, tokres) == 0) {
             return 0;

frontend/parser.c

@@ -40,6 +40,7 @@ static const char *toktab[] = {
     [TT_CC]         = qtok(".cc"),
     [TT_LD]         = qtok(".ld"),
     [TT_COLON]      = qtok(":"),
+    [TT_TILDE]      = qtok("~"),
     [TT_COLONDUB]   = qtok("::")
 };
 

include/frontend/token.h

@@ -21,6 +21,7 @@ typedef enum {
     TT_CC,          /* '.cc' */
     TT_LD,          /* '.ld' */
     TT_COLON,       /* ':' */
+    TT_TILDE,       /* '~' */
     TT_COLONDUB,    /* '::' */
 } tt_t;