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@ -114,313 +114,318 @@ std::ostream& operator<<(std::ostream& out, Generator& generator) {// 是一个
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// class ParseItem
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ParseItem::ParseItem(const std::string& value) : value_(value) {}
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ParseItem::ParseItem(const std::string& value) : value_(value) {}//ParseItem 类的构造函数
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//它接受一个 std::string 类型的参数 value。在构造函数体中，将传入的 value 直接赋值给类的成员变量 value_。
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//这个构造函数用于创建一个 ParseItem 对象，并初始化其 value_ 成员变量。
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// class Parser
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ParseItem* Parser::get(const std::string& key) {
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if (pr_->find(key) != pr_->end()) {
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return (*pr_)[key];
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ParseItem* Parser::get(const std::string& key) {//Parser 类的 get 方法，它接受一个 std::string 类型的参数 key。
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if (pr_->find(key) != pr_->end()) {//如果 key 在 pr_ 中存在
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return (*pr_)[key];//那么返回对应的 ParseItem 指针
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}
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return nullptr;
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return nullptr;//返回 nullptr
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}
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Parser::Parser() : subroutines_(nullptr), pr_(nullptr) {}
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Parser::Parser() : subroutines_(nullptr), pr_(nullptr) {}//
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//Parser 类的构造函数，它使用初始化列表将 subroutines_ 和 pr_ 成员变量初始化为 nullptr。
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Parser::~Parser() { this->cleanup(); }
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Parser::ParseResult* Parser::parse(const int argc, const char** argv) {
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if (!this->init(argc, argv)) {
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return nullptr;
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//这是 Parser 类的析构函数，它调用 cleanup 方法来清理资源。
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Parser::ParseResult* Parser::parse(const int argc, const char** argv) {//Parser 类的 parse 方法，它接受命令行参数的数量 argc 和参数值 argv
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if (!this->init(argc, argv)) {//它调用 init 方法来初始化解析过程
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return nullptr;//如果初始化失败，那么返回 nullptr
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}
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auto ibegin = args_.begin() + 1; // ignore the first cmd name
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auto ibegin = args_.begin() + 1; // 忽略第一个命令名
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auto iend = args_.end();
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auto it = ibegin;
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auto it = ibegin;//定义开始变量名
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if (argc >= 2 && args_[1][0] != '-') {
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// the second block may be a subroutine name
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// 第二个块可能是一个子程序名
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// e.g., ./exec pull --option
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if (subroutines_ && (subroutines_->find(args_[1]) != subroutines_->end())) {
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subroutine_name_ = args_[1];
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it++; // ignore the subroutine name
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it++; // 忽略子程序名
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} else {
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subroutine_name_ = args_[1];
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}
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} else {
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// there is no options as well as subroutine name
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// e.g., ./exec
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// 没有选项以及子程序名
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// 例如，./exec
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subroutine_name_ = Subroutine::get_default_name();
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}
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std::string block;
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std::string previous(*ibegin);
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std::string block;//声明变量
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std::string previous(*ibegin);//声明变量
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for (; it != iend; ++it) {
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block.assign(*it);
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for (; it != iend; ++it) {// 遍历所有的命令行参数
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block.assign(*it);// 将当前参数赋值给 block
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switch (block.size()) {
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case 1:
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if (block == "-") {
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throw ParseError("single '-' is not allowed");
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switch (block.size()) {//// 根据 block 的大小进行不同的处理
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case 1://// 如果 block 的大小为 1
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if (block == "-") {//// 如果 block 是一个单独的 "-"
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throw ParseError("single '-' is not allowed");//// 抛出异常，因为单独的 "-" 是不允许的
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}
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break;
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case 2:
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if (block[0] == '-') {
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if (block[1] == '-') {
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throw ParseError("option '--' is incomplete");
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} else if (block[1] == '=') {
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throw ParseError("option '-=' is invalid");
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case 2:// // 如果 block 的大小为 2
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if (block[0] == '-') {//// 如果 block 的第一个字符是 "-"
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if (block[1] == '-') {//// 如果 block 的第二个字符也是 "-"
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throw ParseError("option '--' is incomplete");//// 抛出异常，因为 "--" 是不完整的选项
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} else if (block[1] == '=') {//// 如果 block 的第二个字符是 "="
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throw ParseError("option '-=' is invalid");//// 抛出异常，因为 "-=" 是无效的选项
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} else {
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// single option
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// 单个选项
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// e.g., ./exec -s
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(*pr_)[block.substr(1)] = nullptr;
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}
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}
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break;
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default: // >=3
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if (block[0] == '-') {
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if (block[1] == '-') {
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size_t pos_equal = block.find('=');
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if (pos_equal == std::string::npos) {
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// a long format option
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if (block[0] == '-') {//// 如果 block 的第一个字符是 "-"
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if (block[1] == '-') {//// 如果 block 的第二个字符也是 "-"
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size_t pos_equal = block.find('=');//// 查找 "=" 在 block 中的位置
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if (pos_equal == std::string::npos) {//// 如果没有找到 "="
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// 长格式选项
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// e.g., ./exec --option
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(*pr_)[block.substr(2)] = nullptr;
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(*pr_)[block.substr(2)] = nullptr;//// 将选项添加到 pr_ 中，值为 nullptr
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} else {
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if (pos_equal > 3) {
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if (pos_equal > 3) {// 如果 "=" 的位置大于 3
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// e.g, ./exec --op[..=]value
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std::string key(block.substr(2, pos_equal - 2));
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if (block.size() > 5)
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std::string key(block.substr(2, pos_equal - 2));// 获取选项名
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if (block.size() > 5)//// 如果 block 的大小大于 5
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// e.g, ./exec --op=v
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(*pr_)[key] = new ParseItem(block.substr(pos_equal + 1));
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(*pr_)[key] = new ParseItem(block.substr(pos_equal + 1));// 将选项和值添加到 pr_ 中
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else
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(*pr_)[key] = nullptr;
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(*pr_)[key] = nullptr;// 将选项添加到 pr_ 中，值为 nullptr
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} else {
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// a long format option but = is illegal
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// 长格式选项但 = 是非法的
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// e.g., ./exec --o=[...]
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(*pr_)[block.substr(2)] = nullptr;
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(*pr_)[block.substr(2)] = nullptr;//// 将选项添加到 pr_ 中，值为 nullptr
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}
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}
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} else if (block[2] == '=') {
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// a single option with =
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} else if (block[2] == '=') {// // 如果 block 的第三个字符是 "="
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// 单个选项带有 =
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// e.g., ./exec -o=[...]
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std::string key;
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key.push_back(block[1]);
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if (block.size() > 3)
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(*pr_)[key] = new ParseItem(block.substr(3));
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key.push_back(block[1]);// 获取选项名
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if (block.size() > 3)// 如果 block 的大小大于 3
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(*pr_)[key] = new ParseItem(block.substr(3));//// 将选项和值添加到 pr_ 中
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else
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(*pr_)[key] = nullptr;
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(*pr_)[key] = nullptr;// 将选项添加到 pr_ 中，值为 nullptr
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} else {
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// a combination options
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// 组合选项
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// e.g., ./exec -ab[...]
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auto tbegin = block.begin() + 1; // ignore the first '-'
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auto tbegin = block.begin() + 1; // 忽略第一个 '-'
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auto tend = block.end();
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auto t = tbegin;
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for (; t != tend; ++t) {
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for (; t != tend; ++t) { // 遍历 block 中的每个字符
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std::string key;
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key.push_back(*t);
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(*pr_)[key] = nullptr;
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key.push_back(*t);// // 获取选项名
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(*pr_)[key] = nullptr; // 将选项添加到 pr_ 中，值为 nullptr
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}
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}
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}
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break;
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} // switch
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if (block[0] != '-' && previous != block // not the first option
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if (block[0] != '-' && previous != block // 如果 block 不是选项（不以 "-" 开头）并且不是第一个选项
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) {
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if (previous[0] != '-') {
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// previous is not an option, error occur
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if (previous[0] != '-') {//// 如果 previous 不是选项
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// previous 不是一个选项，发生错误
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// e.g., ./exec abc def
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throw ParseError("'" + block + "' is not allowed here");
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throw ParseError("'" + block + "' is not allowed here");//抛出异常，因为在这里不允许非选项
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}
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std::string key;
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if (previous[0] == '-' && previous[1] == '-') {
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if (previous[0] == '-' && previous[1] == '-') {//// 如果 previous 是一个长格式选项
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// previous is a long format option.
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// e.g., ./exec --option value
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key = previous.substr(2);
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key = previous.substr(2);//// 获取选项名
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} else {
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// it's the value of previous option.
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// 它是前一个选项的值。
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// e.g., ./exec -o [...]
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// e.g., ./exec -opq [...]
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key.push_back(*(previous.end() - 1));
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key.push_back(*(previous.end() - 1));// // 获取选项名
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}
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if (pr_->find(key) != pr_->end()) {
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(*pr_)[key] = new ParseItem(block);
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if (pr_->find(key) != pr_->end()) {//// 如果选项在 pr_ 中存在
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(*pr_)[key] = new ParseItem(block); // 将选项和值添加到 pr_ 中
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}
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}
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previous = block;
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previous = block;//// 更新 previous 为当前的 block
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} // for
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if (subroutines_) {
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this->set_addition();
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this->set_addition();// 如果存在子程序，调用 set_addition 方法处理额外的选项
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}
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return pr_;
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return pr_;//返回解析结果 pr_
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}
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Parser::ParseResult* Parser::parse(const char* command_line) {
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int i = 0;
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std::string block;
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std::vector<std::string> blocks;
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char c;
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while ((c = command_line[i++]) != '\0') {
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if (c != ' ') {
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block.push_back(c);
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Parser::ParseResult* Parser::parse(const char* command_line) {//Parser 类的 parse 方法
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int i = 0;//初始化计数器
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std::string block;//用于存储单个命令行参数
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std::vector<std::string> blocks;//声明用于存储所有命令行参数
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char c;//声明用于存储当前字符
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while ((c = command_line[i++]) != '\0') {// 遍历命令行字符串
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if (c != ' ') {// 如果当前字符不是空格
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block.push_back(c);//// 将当前字符添加到 block
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} else {
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if (!block.empty()) {
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blocks.push_back(block);
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if (!block.empty()) {// 如果 block 不为空
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blocks.push_back(block);// 将 block 添加到 blocks
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}
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block.clear();
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block.clear();//清空 block
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}
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}
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if (!block.empty()) {
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blocks.push_back(block);
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if (!block.empty()) {// 如果最后一个 block 不为空
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blocks.push_back(block);// 将 block 添加到 blocks
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}
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size_t size = blocks.size(); // argc
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char** argv = new char*[size];
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char** argv = new char*[size];// 创建一个新的 char* 数组
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i = 0;
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std::for_each(blocks.begin(), blocks.end(), [argv, &i](const std::string& b) {
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argv[i++] = const_cast<char*>(b.c_str());
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std::for_each(blocks.begin(), blocks.end(), [argv, &i](const std::string& b) {// 遍历 blocks
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argv[i++] = const_cast<char*>(b.c_str());// 将每个 block 转换为 char* 并存储在 argv 中
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});
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auto pr =
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this->parse(static_cast<const int>(size), const_cast<const char**>(argv));
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this->parse(static_cast<const int>(size), const_cast<const char**>(argv)); // 调用 parse 方法解析命令行参数
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delete[] argv;
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delete[] argv;// 删除 argv
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argv = nullptr;
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return pr;
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return pr;// 返回解析结果
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}
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bool Parser::has(const char* key) {
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std::string skey(key);
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bool Parser::has(const char* key) {//Parser 类的 has 方法，它接受一个 char 指针 key，并检查 key 是否在 pr_ 中存在。
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std::string skey(key);// 将 key 转换为 std::string
|
|
|
|
|
|
|
|
|
|
if (pr_ && !pr_->empty() && !skey.empty()) {
|
|
|
|
|
if (pr_ && !pr_->empty() && !skey.empty()) {//判断是否存在
|
|
|
|
|
if (skey[0] == '-') {
|
|
|
|
|
// check combination options, e.g., Parser::has("-xyz")
|
|
|
|
|
for (size_t i = 1; i < skey.size(); ++i) {
|
|
|
|
|
// 如果 skey 是一个组合选项，例如 "-xyz"
|
|
|
|
|
for (size_t i = 1; i < skey.size(); ++i) {// 遍历 skey 的每个字符
|
|
|
|
|
std::string tkey;
|
|
|
|
|
tkey.push_back(skey[i]);
|
|
|
|
|
if (pr_->find(tkey) == pr_->end()) {
|
|
|
|
|
tkey.push_back(skey[i]);// 获取选项名
|
|
|
|
|
if (pr_->find(tkey) == pr_->end()) { // 如果选项名在 pr_ 中不存在
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return true;
|
|
|
|
|
} else {
|
|
|
|
|
// check single option, e.g., Parser::has("x")
|
|
|
|
|
return pr_->find(skey) != pr_->end();
|
|
|
|
|
// 如果 skey 是一个单个选项，例如 "x"
|
|
|
|
|
return pr_->find(skey) != pr_->end();// 检查选项是否在 pr_ 中存在
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return false;
|
|
|
|
|
return false;// 如果 pr_ 为空或 skey 为空，返回 false
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
//parser 类的 has_or 方法，它接受一个初始化列表 options，并检查 options 中的任何一个 key 是否在 pr_ 中存在。
|
|
|
|
|
bool Parser::has_or(std::initializer_list<const char*> options) {
|
|
|
|
|
if (options.size() == 0) {
|
|
|
|
|
if (options.size() == 0) {// 如果 options 为空
|
|
|
|
|
return false;
|
|
|
|
|
}4
|
|
|
|
|
for (auto key : options) {// 遍历 options 中的每个选项
|
|
|
|
|
if (this->has(key)) return true;// 如果选项在 pr_ 中存在，返回 true
|
|
|
|
|
}
|
|
|
|
|
for (auto key : options) {
|
|
|
|
|
if (this->has(key)) return true;
|
|
|
|
|
}
|
|
|
|
|
return false;
|
|
|
|
|
return false;// 如果 options 中的所有选项都不存在，返回 false
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool Parser::has_and(std::initializer_list<const char*> options) {
|
|
|
|
|
if (options.size() == 0) {
|
|
|
|
|
bool Parser::has_and(std::initializer_list<const char*> options) { // Parser 类的 has_and 方法，接受一个初始化列表 options
|
|
|
|
|
if (options.size() == 0) {// 如果 options 为空
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
for (auto key : options) {
|
|
|
|
|
if (!this->has(key)) return false;
|
|
|
|
|
for (auto key : options) {// 遍历 options 中的每个选项
|
|
|
|
|
if (!this->has(key)) return false;// 如果选项在 pr_ 中不存在，返回 false
|
|
|
|
|
}
|
|
|
|
|
return true;
|
|
|
|
|
return true;// 如果 options 中的所有选项都存在，返回 true
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool Parser::init(const int argc, const char** argv) {
|
|
|
|
|
argc_ = argc;
|
|
|
|
|
argc_ = argc;// 保存参数数量
|
|
|
|
|
// argv_ = argv;
|
|
|
|
|
// don't save it, point to a local var in parse(const char* command_line).
|
|
|
|
|
// use member var args_ instead.
|
|
|
|
|
if (argc > 0) {
|
|
|
|
|
this->cleanup();
|
|
|
|
|
if (argc > 0) {// 如果参数数量大于 0
|
|
|
|
|
this->cleanup(); // 清理之前的解析结果
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
args_.reserve(static_cast<size_t>(argc_));
|
|
|
|
|
args_.reserve(static_cast<size_t>(argc_));// 为 args_ 预留空间
|
|
|
|
|
|
|
|
|
|
for (int i = 0; i < argc_; ++i) {
|
|
|
|
|
args_.push_back(argv[i]);
|
|
|
|
|
for (int i = 0; i < argc_; ++i) {// 遍历所有的命令行参数
|
|
|
|
|
args_.push_back(argv[i]);// 将参数添加到 args_
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
pr_ = new Parser::ParseResult;
|
|
|
|
|
pr_ = new Parser::ParseResult;// 创建新的解析结果
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
return false;
|
|
|
|
|
return false;// 如果参数数量为 0，返回 false
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void Parser::cleanup() {
|
|
|
|
|
args_.clear();
|
|
|
|
|
if (pr_) {
|
|
|
|
|
void Parser::cleanup() {// Parser 类的 cleanup 方法，用于清理解析结果
|
|
|
|
|
args_.clear();// 清空 args_
|
|
|
|
|
if (pr_) {// 如果 pr_ 不为空
|
|
|
|
|
auto ibegin = pr_->begin();
|
|
|
|
|
auto iend = pr_->end();
|
|
|
|
|
auto it = ibegin;
|
|
|
|
|
for (; it != iend; ++it) {
|
|
|
|
|
for (; it != iend; ++it) {// 遍历 pr_ 中的每个元素
|
|
|
|
|
ParseItem* item = it->second;
|
|
|
|
|
if (item) delete item;
|
|
|
|
|
if (item) delete item;// 删除元素
|
|
|
|
|
}
|
|
|
|
|
delete pr_;
|
|
|
|
|
delete pr_;// 删除 pr_
|
|
|
|
|
pr_ = nullptr;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void Parser::set_addition() {
|
|
|
|
|
if (subroutines_->find(subroutine_name_) != subroutines_->end()) {
|
|
|
|
|
for (const Row& row : *(subroutines_->at(subroutine_name_))) {
|
|
|
|
|
void Parser::set_addition() {// Parser 类的 set_addition 方法，用于处理额外的选项
|
|
|
|
|
if (subroutines_->find(subroutine_name_) != subroutines_->end()) {// 如果子程序名在 subroutines_ 中存在
|
|
|
|
|
for (const Row& row : *(subroutines_->at(subroutine_name_))) {// 遍历子程序中的每一行
|
|
|
|
|
// assume both -o and --option are allowed,
|
|
|
|
|
// but only provide -o,
|
|
|
|
|
// then set the another --option.
|
|
|
|
|
// vice versa.
|
|
|
|
|
const std::string& def = row.value();
|
|
|
|
|
const std::string& ops = row.oshort();
|
|
|
|
|
const std::string& opl = row.olong();
|
|
|
|
|
ParseResult& pr = *pr_;
|
|
|
|
|
const std::string& def = row.value();// 获取默认值
|
|
|
|
|
const std::string& ops = row.oshort();// 获取短选项
|
|
|
|
|
const std::string& opl = row.olong();// 获取长选项
|
|
|
|
|
ParseResult& pr = *pr_; // 获取解析结果
|
|
|
|
|
|
|
|
|
|
bool has_short = this->has(ops.c_str());
|
|
|
|
|
bool has_long = this->has(opl.c_str());
|
|
|
|
|
bool has_short = this->has(ops.c_str());// 检查短选项是否存在
|
|
|
|
|
bool has_long = this->has(opl.c_str());// 检查长选项是否存在
|
|
|
|
|
|
|
|
|
|
// assume -o [ --option ] arg = 1
|
|
|
|
|
// but not provide option value,
|
|
|
|
|
// then set to default 1.
|
|
|
|
|
// otherwise, both set to user defined value
|
|
|
|
|
|
|
|
|
|
if (!ops.empty()) {
|
|
|
|
|
if (has_short) {
|
|
|
|
|
if (pr[ops] != nullptr && !opl.empty()) {
|
|
|
|
|
pr[opl] = new ParseItem(std::move(pr[ops]->val()));
|
|
|
|
|
} else if (pr[ops] == nullptr && !def.empty()) {
|
|
|
|
|
pr[ops] = new ParseItem(std::move(def));
|
|
|
|
|
if (!opl.empty()) pr[opl] = new ParseItem(std::move(def));
|
|
|
|
|
if (!ops.empty()) {// 如果短选项不为空
|
|
|
|
|
if (has_short) {// 如果短选项存在
|
|
|
|
|
if (pr[ops] != nullptr && !opl.empty()) {// 如果短选项有值且长选项不为空
|
|
|
|
|
pr[opl] = new ParseItem(std::move(pr[ops]->val()));// 将短选项的值赋给长选项
|
|
|
|
|
} else if (pr[ops] == nullptr && !def.empty()) {// 如果短选项没有值且默认值不为空
|
|
|
|
|
pr[ops] = new ParseItem(std::move(def));// 将默认值赋给短选项
|
|
|
|
|
if (!opl.empty()) pr[opl] = new ParseItem(std::move(def));// 如果长选项不为空，也将默认值赋给长选项
|
|
|
|
|
} else {
|
|
|
|
|
pr[opl] = nullptr;
|
|
|
|
|
pr[opl] = nullptr;// 将长选项的值设为 nullptr
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!opl.empty()) {
|
|
|
|
|
if (has_long) {
|
|
|
|
|
if (pr[opl] != nullptr && !ops.empty()) {
|
|
|
|
|
pr[ops] = new ParseItem(std::move(pr[opl]->val()));
|
|
|
|
|
} else if (pr[opl] == nullptr && !def.empty()) {
|
|
|
|
|
if (!ops.empty()) pr[ops] = new ParseItem(std::move(def));
|
|
|
|
|
pr[opl] = new ParseItem(std::move(def));
|
|
|
|
|
if (!opl.empty()) {// 如果长选项不为空
|
|
|
|
|
if (has_long) { // 如果长选项存在
|
|
|
|
|
if (pr[opl] != nullptr && !ops.empty()) { // 如果长选项有值且短选项不为空
|
|
|
|
|
pr[ops] = new ParseItem(std::move(pr[opl]->val()));// 将长选项的值赋给短选项
|
|
|
|
|
} else if (pr[opl] == nullptr && !def.empty()) {// 如果长选项没有值且默认值不为空
|
|
|
|
|
if (!ops.empty()) pr[ops] = new ParseItem(std::move(def));// 如果短选项不为空，将默认值赋给短选项
|
|
|
|
|
pr[opl] = new ParseItem(std::move(def));// 将默认值赋给长选项
|
|
|
|
|
} else {
|
|
|
|
|
pr[ops] = nullptr;
|
|
|
|
|
pr[ops] = nullptr;// 将短选项的值设为 nullptr
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!has_long && !has_short && !def.empty()) {
|
|
|
|
|
if (!opl.empty()) pr[opl] = new ParseItem(std::move(def));
|
|
|
|
|
if (!ops.empty()) pr[ops] = new ParseItem(std::move(def));
|
|
|
|
|
if (!has_long && !has_short && !def.empty()) {// 如果长选项和短选项都不存在且默认值不为
|
|
|
|
|
if (!opl.empty()) pr[opl] = new ParseItem(std::move(def));// 如果长选项不为空，将默认值赋给长选项
|
|
|
|
|
if (!ops.empty()) pr[ops] = new ParseItem(std::move(def));// 如果短选项不为空，将默认值赋给短选项
|
|
|
|
|
}
|
|
|
|
|
} // for
|
|
|
|
|
} // if
|
|
|
|
|
@ -428,114 +433,115 @@ void Parser::set_addition() {
|
|
|
|
|
|
|
|
|
|
// class Row
|
|
|
|
|
|
|
|
|
|
Row::Row() : require_value(true) {}
|
|
|
|
|
Row::Row() : require_value(true) {} // Row 类的构造函数，初始化 require_value 为 true
|
|
|
|
|
|
|
|
|
|
// class Subroutine
|
|
|
|
|
|
|
|
|
|
Subroutine::Subroutine() : first_line_("") {}
|
|
|
|
|
Subroutine::Subroutine() : first_line_("") {}// Subroutine 类的默认构造函数，初始化 first_line_ 为空字符串
|
|
|
|
|
|
|
|
|
|
Subroutine::Subroutine(const char* name, const char* description)
|
|
|
|
|
: first_line_(""), description_(description), name_(name) {
|
|
|
|
|
usages_.reserve(5);
|
|
|
|
|
: first_line_(""), description_(description), name_(name) { // Subroutine 类的构造函数，接受子程序名和描述作为参数
|
|
|
|
|
usages_.reserve(5);// 为 usages_ 预留空间
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void Subroutine::print_with_row(std::ostream& out) {
|
|
|
|
|
void Subroutine::print_with_row(std::ostream& out) {// Subroutine 类的 print_with_row 方法，接受一个输出流作为参数
|
|
|
|
|
// print the subroutine name and its description
|
|
|
|
|
if (strcmp(get_first_line(), "") != 0) {
|
|
|
|
|
// 打印子程序名和描述
|
|
|
|
|
if (strcmp(get_first_line(), "") != 0) {// 如果 first_line_ 不为空
|
|
|
|
|
// print the first line
|
|
|
|
|
out << get_first_line();
|
|
|
|
|
if (!usages_.empty()) {
|
|
|
|
|
out << std::endl;
|
|
|
|
|
if (!usages_.empty()) {// 如果 usages_ 不为空
|
|
|
|
|
out << std::endl;// 打印换行符
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
auto begin = usages_.begin();
|
|
|
|
|
auto end = usages_.end();
|
|
|
|
|
auto begin = usages_.begin(); // 获取 usages_ 的开始迭代器
|
|
|
|
|
auto end = usages_.end();// 获取 usages_ 的结束迭代器
|
|
|
|
|
|
|
|
|
|
std::vector<std::string> row_list;
|
|
|
|
|
row_list.reserve(usages_.size());
|
|
|
|
|
std::vector<std::string> row_list;// 创建一个字符串向量用于存储行
|
|
|
|
|
row_list.reserve(usages_.size());// 为 row_list 预留空间
|
|
|
|
|
|
|
|
|
|
// build usage rows without description field,
|
|
|
|
|
// find the max-len row at the same time.
|
|
|
|
|
size_t max_len = 0;
|
|
|
|
|
std::for_each(begin, end, [&max_len, &row_list](const Row& row) {
|
|
|
|
|
std::stringstream ss;
|
|
|
|
|
ss << " ";
|
|
|
|
|
if (!row.oshort().empty()) {
|
|
|
|
|
ss << "-" << row.oshort() << " ";
|
|
|
|
|
std::for_each(begin, end, [&max_len, &row_list](const Row& row) {// 遍历 usages_
|
|
|
|
|
std::stringstream ss;// 创建一个字符串流
|
|
|
|
|
ss << " ";// 向字符串流中添加两个空格
|
|
|
|
|
if (!row.oshort().empty()) {// 如果短选项不为空
|
|
|
|
|
ss << "-" << row.oshort() << " "; // 添加短选项
|
|
|
|
|
}
|
|
|
|
|
if (!row.olong().empty()) {
|
|
|
|
|
if (!row.olong().empty()) {// 如果长选项不为空
|
|
|
|
|
if (!row.oshort().empty())
|
|
|
|
|
ss << "[ --" << row.olong() << " ] ";
|
|
|
|
|
ss << "[ --" << row.olong() << " ] ";// 添加长选项
|
|
|
|
|
else
|
|
|
|
|
ss << "--" << row.olong() << " ";
|
|
|
|
|
ss << "--" << row.olong() << " "; // 添加长选项
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (row.required()) {
|
|
|
|
|
ss << "arg ";
|
|
|
|
|
if (!row.value().empty()) {
|
|
|
|
|
ss << "= " << row.value() << " ";
|
|
|
|
|
if (row.required()) {// 如果选项是必需的
|
|
|
|
|
ss << "arg "; // 添加 "arg "
|
|
|
|
|
if (!row.value().empty()) {// 如果选项值不为空
|
|
|
|
|
ss << "= " << row.value() << " ";// 添加选项值
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
max_len = std::max(max_len, ss.str().size());
|
|
|
|
|
row_list.push_back(std::move(ss.str()));
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max_len = std::max(max_len, ss.str().size());// 更新最大长度
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row_list.push_back(std::move(ss.str()));// 将字符串流的内容添加到 row_list
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});
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// show all rows and align description field
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|
|
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size_t row_count = usages_.size();
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|
|
|
for (size_t i = 0; i < row_count; ++i) {
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std::string str_row(std::move(row_list[i]));
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size_t row_count = usages_.size();// 获取 usages_ 的大小
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|
for (size_t i = 0; i < row_count; ++i) {// 遍历 usages_
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std::string str_row(std::move(row_list[i]));// 获取当前行
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|
// print row without description
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|
out << str_row;
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out << str_row;// 打印当前行
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|
|
|
// print spaces
|
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|
|
|
size_t spaces = 0;
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|
|
size_t len = str_row.size();
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|
|
if (max_len > len) spaces = max_len - len;
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|
|
|
size_t spaces = 0;// 打印空格
|
|
|
|
|
size_t len = str_row.size();// 获取当前行的长度
|
|
|
|
|
if (max_len > len) spaces = max_len - len;// 计算需要打印的空格数量
|
|
|
|
|
|
|
|
|
|
while (spaces--) {
|
|
|
|
|
while (spaces--) {// 打印空格
|
|
|
|
|
out << " ";
|
|
|
|
|
}
|
|
|
|
|
// print description
|
|
|
|
|
out << usages_.at(i).desc() << std::endl;
|
|
|
|
|
out << usages_.at(i).desc() << std::endl;// 打印描述
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void Subroutine::print_with_template(std::ostream& out) {
|
|
|
|
|
for (auto usage : usages_) {
|
|
|
|
|
void Subroutine::print_with_template(std::ostream& out) {// Subroutine 类的 print_with_template 方法，接受一个输出流作为参数
|
|
|
|
|
for (auto usage : usages_) {// 遍历 usages_
|
|
|
|
|
size_t i = 0;
|
|
|
|
|
for (auto t = template_str_.begin(); t != template_str_.end(); ++t) {
|
|
|
|
|
if (*t == '%') {
|
|
|
|
|
switch (*(order_.begin() + i)) {
|
|
|
|
|
for (auto t = template_str_.begin(); t != template_str_.end(); ++t) {// 遍历模板字符串
|
|
|
|
|
if (*t == '%') {// 如果当前字符是 '%'
|
|
|
|
|
switch (*(order_.begin() + i)) { // 根据 order_ 中的值决定打印哪个字段
|
|
|
|
|
case Row::kShort:
|
|
|
|
|
out << usage.oshort();
|
|
|
|
|
out << usage.oshort();// 打印短选项
|
|
|
|
|
break;
|
|
|
|
|
case Row::kLong:
|
|
|
|
|
out << usage.olong();
|
|
|
|
|
out << usage.olong();// 打印长选项
|
|
|
|
|
break;
|
|
|
|
|
case Row::kDefault:
|
|
|
|
|
out << usage.value();
|
|
|
|
|
out << usage.value();// 打印默认值
|
|
|
|
|
break;
|
|
|
|
|
case Row::kDescription:
|
|
|
|
|
out << usage.desc();
|
|
|
|
|
out << usage.desc();// 打印描述
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
++i;
|
|
|
|
|
} else {
|
|
|
|
|
out << *t;
|
|
|
|
|
out << *t;// 如果当前字符不是 '%'，直接打印
|
|
|
|
|
} // if %
|
|
|
|
|
} // for template_str_
|
|
|
|
|
out << std::endl;
|
|
|
|
|
out << std::endl;// 打印换行符
|
|
|
|
|
} // for usages_
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
std::ostream& operator<<(std::ostream& out, Subroutine& subroutine) {
|
|
|
|
|
if (subroutine.template_str_.empty()) {
|
|
|
|
|
subroutine.print_with_row(out);
|
|
|
|
|
std::ostream& operator<<(std::ostream& out, Subroutine& subroutine) {// 重载 << 运算符，接受一个输出流和一个 Subroutine 对象作为参数
|
|
|
|
|
if (subroutine.template_str_.empty()) {// 如果模板字符串为空
|
|
|
|
|
subroutine.print_with_row(out);// 使用 print_with_row 方法打印
|
|
|
|
|
} else {
|
|
|
|
|
subroutine.print_with_template(out);
|
|
|
|
|
subroutine.print_with_template(out);// 使用 print_with_template 方法打印
|
|
|
|
|
}
|
|
|
|
|
return out;
|
|
|
|
|
return out;// 返回输出流
|
|
|
|
|
}
|
|
|
|
|
}
|
