Support wildcards in construct

tests/construct_tests.c

@@ -53,6 +53,31 @@ static void test_empty_expression(void)
 	fsa_free(&fsa);
 }
 
+static void test_wildcard(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;
+	const regex_t regex
+	    = { .count = 1, .capacity = 1, .contents = alternatives };
+
+	fsa_t fsa;
+	construct_nfa(&regex, &fsa);
+
+	ASSERT_TRUE(accepts(&fsa, "a"));
+	ASSERT_TRUE(accepts(&fsa, "b"));
+	ASSERT_TRUE(accepts(&fsa, "c"));
+	ASSERT_TRUE(accepts(&fsa, "d"));
+	ASSERT_FALSE(accepts(&fsa, ""));
+	ASSERT_FALSE(accepts(&fsa, "aa"));
+
+	regex_free(&regex);
+	fsa_free(&fsa);
+}
+
 static void test_literal_expression(void)
 {
 	regex_term_t *terms = malloc(1 * sizeof(regex_term_t));
@@ -386,6 +411,7 @@ int main(void)
 	// Base cases
 	test_empty_expression();
 	test_literal_expression();
+	test_wildcard();
 	test_sequence();
 	test_union();
 	test_star();