Function parse_char_classes

subprojects/llama.cpp/common/peg-parser.cpp:207–242

}

static std::pair<std::vector<common_peg_chars_parser::char_range>, bool> parse_char_classes(const std::string & classes) {
    std::vector<common_peg_chars_parser::char_range> ranges;
    bool negated = false;

    std::string content = classes;
    if (content.front() == '[') {
        content = content.substr(1);
    }

    if (content.back() == ']') {
        content.pop_back();
    }

    // Check for negation
    if (!content.empty() && content.front() == '^') {
        negated = true;
        content = content.substr(1);
    }

    size_t i = 0;
    while (i < content.length()) {
        auto [start, start_len] = parse_char_class_char(content, i);
        i += start_len;

        if (i + 1 < content.length() && content[i] == '-') {
            // Range detected
            auto [end, end_len] = parse_char_class_char(content, i + 1);
            ranges.push_back(common_peg_chars_parser::char_range{start, end});
            i += 1 + end_len;
        } else {
            ranges.push_back(common_peg_chars_parser::char_range{start, start});
        }
    }

    return {ranges, negated};
}

void common_peg_ast_arena::visit(common_peg_ast_id id, const common_peg_ast_visitor & visitor) const {
    if (id == COMMON_PEG_INVALID_AST_ID) {