Fix NullToken definition

soutaro · soutaro · commit ccdef8b57906 · 2025-05-08T17:51:50.000+09:00
diff --git a/include/rbs/lexer.h b/include/rbs/lexer.h
@@ -140,9 +140,9 @@ typedef struct {
   const rbs_encoding_t *encoding;
 } rbs_lexer_t;
 
-extern rbs_token_t NullToken;
-extern rbs_position_t NullPosition;
-extern rbs_range_t NULL_RANGE;
+extern const rbs_token_t NullToken;
+extern const rbs_position_t NullPosition;
+extern const rbs_range_t NULL_RANGE;
 
 char *rbs_peek_token(rbs_lexer_t *lexer, rbs_token_t tok);
 int rbs_token_chars(rbs_token_t tok);
diff --git a/src/lexstate.c b/src/lexstate.c
@@ -92,9 +92,9 @@ static const char *RBS_TOKENTYPE_NAMES[] = {
   "tANNOTATION",      /* Annotation */
 };
 
-rbs_token_t NullToken = { .type = NullType, .range = {0} };
-rbs_position_t NullPosition = { -1, -1, -1, -1 };
-rbs_range_t NULL_RANGE = { { -1, -1, -1, -1 }, { -1, -1, -1, -1 } };
+const rbs_position_t NullPosition = { -1, -1, -1, -1 };
+const rbs_range_t NULL_RANGE = { { -1, -1, -1, -1 }, { -1, -1, -1, -1 } };
+const rbs_token_t NullToken = { .type = NullType, .range = { {0}, {0} } };
 
 const char *rbs_token_type_str(enum RBSTokenType type) {
   return RBS_TOKENTYPE_NAMES[type];
