Implement character class parsing

tests/parser_tests.c

@@ -211,6 +211,40 @@ static void dot_question_mark_is_parsed_as_zero_or_one_wildcard(void)
 	regex_free_children(&r);
 }
 
+static void a_in_brackets_is_parsed_as_class_containing_only_a(void)
+{
+	regex_t r = { 0 };
+	const int result = PARSE_REGEX_STRING("[a]", &r);
+	ASSERT_NE(-1, result);
+
+	ASSERT_EQ(1, r.sequence.len);
+	ASSERT_EQ(QUANTIFIER_NONE, r.sequence.contents[0].quantifier);
+	ASSERT_EQ(TERM_TYPE_CLASS, r.sequence.contents[0].type);
+	ASSERT_FALSE(r.sequence.contents[0].class.negated);
+	ASSERT_EQ(1, r.sequence.contents[0].class.count);
+	ASSERT_NOT_NULL(r.sequence.contents[0].class.contents);
+	ASSERT_EQ('a', r.sequence.contents[0].class.contents[0]);
+
+	regex_free_children(&r);
+}
+
+static void caret_a_in_brackets_parses_as_negated_class(void)
+{
+	regex_t r = { 0 };
+	const int result = PARSE_REGEX_STRING("[^a]", &r);
+	ASSERT_NE(-1, result);
+
+	ASSERT_EQ(1, r.sequence.len);
+	ASSERT_EQ(QUANTIFIER_NONE, r.sequence.contents[0].quantifier);
+	ASSERT_EQ(TERM_TYPE_CLASS, r.sequence.contents[0].type);
+	ASSERT_TRUE(r.sequence.contents[0].class.negated);
+	ASSERT_EQ(1, r.sequence.contents[0].class.count);
+	ASSERT_NOT_NULL(r.sequence.contents[0].class.contents);
+	ASSERT_EQ('a', r.sequence.contents[0].class.contents[0]);
+
+	regex_free_children(&r);
+}
+
 int main(void)
 {
 	TESTING_BEGIN();
@@ -228,5 +262,7 @@ int main(void)
 	dot_star_is_parsed_as_zero_or_more_wildcard();
 	dot_plus_is_parsed_as_one_or_more_wildcard();
 	dot_question_mark_is_parsed_as_zero_or_one_wildcard();
+	a_in_brackets_is_parsed_as_class_containing_only_a();
+	caret_a_in_brackets_parses_as_negated_class();
 	return TESTING_END();
 }