Method _separate_compound_words

core/string/ustring.cpp:730–781

}

String String::_separate_compound_words() const {
	if (length() == 0) {
		return *this;
	}

	const char32_t *cstr = get_data();
	int start_index = 0;
	String new_string;

	bool is_prev_upper = is_unicode_upper_case(cstr[0]);
	bool is_prev_lower = is_unicode_lower_case(cstr[0]);
	bool is_prev_digit = is_digit(cstr[0]);

	for (int i = 1; i < length(); i++) {
		const bool is_curr_upper = is_unicode_upper_case(cstr[i]);
		const bool is_curr_lower = is_unicode_lower_case(cstr[i]);
		const bool is_curr_digit = is_digit(cstr[i]);

		bool is_next_lower = false;
		if (i + 1 < length()) {
			is_next_lower = is_unicode_lower_case(cstr[i + 1]);
		}

		const bool cond_a = is_prev_lower && is_curr_upper; // aA
		const bool cond_b = (is_prev_upper || is_prev_digit) && is_curr_upper && is_next_lower; // AAa, 2Aa
		const bool cond_c = is_prev_digit && is_curr_lower && is_next_lower; // 2aa
		const bool cond_d = (is_prev_upper || is_prev_lower) && is_curr_digit; // A2, a2

		if (cond_a || cond_b || cond_c || cond_d) {
			new_string += substr(start_index, i - start_index) + " ";
			start_index = i;
		}

		is_prev_upper = is_curr_upper;
		is_prev_lower = is_curr_lower;
		is_prev_digit = is_curr_digit;
	}

	new_string += substr(start_index, size() - start_index);

	for (int i = 0; i < new_string.size(); i++) {
		const bool whitespace = is_whitespace(new_string[i]);
		const bool underscore = is_underscore(new_string[i]);
		const bool hyphen = is_hyphen(new_string[i]);

		if (whitespace || underscore || hyphen) {
			new_string[i] = ' ';
		}
	}

	return new_string.to_lower();
}

String String::capitalize() const {
	String words = _separate_compound_words().strip_edges();