Remove wildcard assert from desugar

lib/desugar.c

@@ -98,20 +98,8 @@ static void desugar_qmark(regex_term_t *term)
 
 static void desugar_term(regex_term_t *term)
 {
-	switch (term->type) {
+	if (REGEX_TERM_SUBEXPR == term->type)
-	case REGEX_TERM_WILDCARD:
-		assert(false);
-		break;
-
-	case REGEX_TERM_SUBEXPR:
 		desugar_regex(&term->subexpr);
-		break;
-
-	case REGEX_TERM_CLASS:
-	case REGEX_TERM_LITERAL:
-	case REGEX_TERM_EMPTY:
-		break;
-	}
 
 	switch (term->quantifier) {
 	case REGEX_QUANTIFIER_PLUS:

tests/desugar_tests.c

@@ -32,6 +32,28 @@ static void a_is_unchanged(void)
 	regex_free(&t);
 }
 
+static void wildcard_is_unchanged(void)
+{
+	regex_term_t *terms = malloc(1 * sizeof(regex_term_t));
+	terms[0].quantifier = REGEX_QUANTIFIER_NONE;
+	terms[0].type = REGEX_TERM_WILDCARD;
+	regex_sequence_t *alternatives = malloc(1 * sizeof(regex_sequence_t));
+	alternatives[0].count = alternatives[0].capacity = 1;
+	alternatives[0].contents = terms;
+	regex_t t = { .count = 1, .capacity = 1, .contents = alternatives };
+
+	desugar_regex(&t);
+
+	ASSERT_EQ(1, t.count);
+	ASSERT_NOT_NULL(t.contents);
+	ASSERT_EQ(1, t.contents[0].count);
+	ASSERT_NOT_NULL(t.contents[0].contents);
+	ASSERT_EQ(REGEX_QUANTIFIER_NONE, t.contents[0].contents[0].quantifier);
+	ASSERT_EQ(REGEX_TERM_WILDCARD, t.contents[0].contents[0].type);
+
+	regex_free(&t);
+}
+
 static void abc_is_unchanged(void)
 {
 	regex_term_t *terms = malloc(3 * sizeof(regex_term_t));
@@ -327,6 +349,7 @@ int main(void)
 {
 	TESTING_BEGIN();
 	a_is_unchanged();
+	wildcard_is_unchanged();
 	abc_is_unchanged();
 	a_star_is_unchanged();
 	a_or_b_or_c_is_unchanged();