Config.hpp

chronolaw · chronolaw · commit 107343f4b009 · 2020-04-10T16:50:32.000+08:00
diff --git a/section5/Config.hpp b/section5/Config.hpp
@@ -44,22 +44,27 @@ class Config final
         }
     }
 
-    value_type get(string_view_type key)
+    template<typename T>
+    T get(string_view_type key)
     {
-        if (!std::regex_match(key, m_what, m_conf_reg)) {
+        if (!std::regex_match(key, m_what, m_reg)) {
             throw std::runtime_error("config key error");
         }
 
         auto w1 = m_what[1].str();
         auto w2 = m_what[2].str();
 
-        return luabridge::getGlobal(
-                    m_vm.get(), w1.c_str())[w2];
+        using namespace luabridge;
+
+        auto v = getGlobal(
+                    m_vm.get(), w1.c_str());
+
+        return LuaRef_cast<T>(v[w2]);
     }
 private:
     vm_type     m_vm {luaL_newstate(), lua_close};
 
-    regex_type  m_conf_reg {R"(^(\w+)\.(\w+)$)"};
+    regex_type  m_reg {R"(^(\w+)\.(\w+)$)"};
     match_type  m_what;
 };
 
diff --git a/section5/srv.cpp b/section5/srv.cpp
@@ -37,6 +37,9 @@ try
 {
     cout << "hello cpp_study server" << endl;
 
+    Config conf;
+    conf.load("./conf.lua");
+
     Summary sum;
     std::atomic_int count {0};
 
@@ -86,12 +89,8 @@ try
         }
     };
 
-    Config conf;
-    conf.load("./conf.lua");
-
-    string listen_addr = conf.get("config.zmq_ipc_addr");
-
-    auto fu = std::async(cycle, listen_addr);
+    auto fu = std::async(cycle,
+                conf.get<string>("config.zmq_ipc_addr"));
 
     fu.wait();
 }

Original file line number	Diff line number	Diff line change
`@@ -44,22 +44,27 @@ class Config final`
`44`	`44`	`}`
`45`	`45`	`}`
`46`	`46`
`47`		`- value_type get(string_view_type key)`
	`47`	`+ template<typename T>`
	`48`	`+ T get(string_view_type key)`
`48`	`49`	`{`
`49`		`- if (!std::regex_match(key, m_what, m_conf_reg)) {`
	`50`	`+ if (!std::regex_match(key, m_what, m_reg)) {`
`50`	`51`	`throw std::runtime_error("config key error");`
`51`	`52`	`}`
`52`	`53`
`53`	`54`	`auto w1 = m_what[1].str();`
`54`	`55`	`auto w2 = m_what[2].str();`
`55`	`56`
`56`		`- return luabridge::getGlobal(`
`57`		`- m_vm.get(), w1.c_str())[w2];`
	`57`	`+ using namespace luabridge;`
	`58`	`+`
	`59`	`+ auto v = getGlobal(`
	`60`	`+ m_vm.get(), w1.c_str());`
	`61`	`+`
	`62`	`+ return LuaRef_cast<T>(v[w2]);`
`58`	`63`	`}`
`59`	`64`	`private:`
`60`	`65`	`vm_type m_vm {luaL_newstate(), lua_close};`
`61`	`66`
`62`		`- regex_type m_conf_reg {R"(^(\w+)\.(\w+)$)"};`
	`67`	`+ regex_type m_reg {R"(^(\w+)\.(\w+)$)"};`
`63`	`68`	`match_type m_what;`
`64`	`69`	`};`
`65`	`70`