intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 51 insertions, 0 deletions

diff --git a/library/cpp/getopt/small/last_getopt_easy_setup.h b/library/cpp/getopt/small/last_getopt_easy_setup.h
new file mode 100644
index 0000000000..60dddda225
--- /dev/null
+++ b/library/cpp/getopt/small/last_getopt_easy_setup.h
@@ -0,0 +1,51 @@
+#pragma once
+
+#include "last_getopt_opts.h"
+
+namespace NLastGetopt {
+    /**
+     * Wrapper for TOpts class to make the life a bit easier.
+     * Usual usage:
+     *   TEasySetup opts;
+     *   opts('s', "server",  "MR_SERVER", "MapReduce server name in format server:port", true)
+     *       ('u', "user",    "MR_USER",   "MapReduce user name", true)
+     *       ('o', "output",  "MR_TABLE",  "Name of MR table which will contain results", true)
+     *       ('r', "rules",   "FILE",      "Filename for .rules output file")          //!< This parameter is optional and has a required argument
+     *       ('v', "version", &PrintSvnVersionAndExit0, "Print version information")   //!< Parameter with handler can't get any argument
+     *       ("verbose", "Be verbose")                                                 //!< You may not specify short param name
+     *
+     *       NLastGetopt::TOptsParseResult r(&opts, argc, argv);
+     */
+    class TEasySetup: public TOpts {
+    public:
+        TEasySetup(const TStringBuf& optstring = TStringBuf());
+        TEasySetup& operator()(char shortName, const char* longName, const char* help, bool required = false);
+        TEasySetup& operator()(char shortName, const char* longName, const char* argName, const char* help, bool required = false);
+
+        template <class TpFunc>
+        TEasySetup& operator()(char shortName, const char* longName, TpFunc handler, const char* help, bool required = false) {
+            AdjustParam(longName, help, nullptr, handler, required).AddShortName(shortName);
+            return *this;
+        }
+
+        TEasySetup& operator()(const char* longName, const char* help, bool required = false);
+        TEasySetup& operator()(const char* longName, const char* argName, const char* help, bool required = false);
+
+        template <class TpFunc>
+        TEasySetup& operator()(const char* longName, TpFunc handler, const char* help, bool required = false) {
+            AdjustParam(longName, help, nullptr, handler, required);
+            return *this;
+        }
+
+    private:
+        TOpt& AdjustParam(const char* longName, const char* help, const char* argName, bool required);
+
+        template <class TpFunc>
+        TOpt& AdjustParam(const char* longName, const char* help, const char* argName, TpFunc handler, bool required) {
+            TOpt& o = AdjustParam(longName, help, argName, required);
+            o.Handler0(handler);
+            return o;
+        }
+    };
+
+}