添加生成help功能

include/Order.h

@@ -82,6 +82,9 @@ namespace ling {
 
         const std::string &getError() const;
 
+        /// 生成help内容
+        std::string generateHelp(const std::string & title) const;
+
         friend class Options;
     };
 } // ling

src/Order.cpp

@@ -4,6 +4,9 @@
 
 #include "../include/Order.h"
 
+#include <iomanip>
+#include <iostream>
+#include <sstream>
 #include <stdexcept>
 
 #define THROW(errStr) do{ this->err = errStr; return false; } while(false)
@@ -144,4 +147,25 @@ namespace ling {
     const std::string &Order::getError() const {
         return err;
     }
+
+    std::string Order::generateHelp(const std::string &title) const {
+        std::stringstream stream;
+        stream << title << std::endl;
+        std::cout << std::endl;
+        for (const auto &[fst, snd]: data) {
+            std::stringstream temp;
+            //即使参数有多个选项，也只输出前两个
+            if (snd.options.size() == 2) {
+                temp << std::left << std::setw(7) << (snd.options[0] + ",") << std::left << std::setw(18) << snd.options[1];
+            } else {
+                if (snd.options[0].at(0) == '-' && snd.options[0].at(1) == '-')
+                    temp << std::left << std::setw(7) << "" << std::left << std::setw(18) << snd.options[0];
+                else
+                    temp << std::left << std::setw(25) << snd.options[0];
+            }
+            temp << std::left << std::setw(55) << snd.memage;
+            stream << temp.str() << std::endl;
+        }
+        return stream.str();
+    }
 } // ling

test_main.cpp

@@ -97,3 +97,15 @@ TEST(Option, 匿名参数测试3) {
     if (order.analysis())
         ASSERT_FALSE("匿名参数数量超出限制，但是没有抛出异常！");
 }
+
+
+TEST(Option, Help生成) {
+    ling::Order order({"-pts", "hello world!", "hello!", "--all", "--ok", "world"});
+    order.addAnonymity(1);
+    const auto pts = order.addOption({"-pts", "--pts"}, ling::Order::Type::STRING, "测试参数");
+    const auto all = order.addOption({"-all", "--all"},"测试参数");
+    const auto ok = order.addOption({"-ok", "--ok"},"测试参数");
+    const auto cancel = order.addOption({"--cancel"},"测试参数");
+    auto help = order.generateHelp("test [选项] .. [参数]\n测试命令");
+    std::cout << help << std::endl;
+}