add warnings

README.md

@@ -1,3 +1,9 @@
+# Warnings
+Since commit `f66048ed999aa1b50dc956c4a728ff565042d761`, I move ThreadPool to C++17. (To use `std::apply`.)<br>
+In addition, **the rule of passing parameters to ThreadPool is different.**<br>
+Unlike before, which uses `std::bind`, **ThreadPool will not copy anything right now.**<br>
+All of ThreadPool does is forward (**no decay**).<br>
+This means you have to copy arguments by yourself before passing it to ThreadPool.
 # Contents
 [Introduction](https://github.com/Fdhvdu/ThreadPool/blob/master/README.md#introduction)<br>
 [Class view](https://github.com/Fdhvdu/ThreadPool/blob/master/README.md#class-view)<br>
@@ -33,7 +39,7 @@ Two classes
 		void         wait_all() const
 Use the CThreadPool_Ret when you want to get the return value of function.<br>
 Use the CThreadPool when you don't care the return value of function.<br>
-CThreadPool::add_and_detach is faster (very) than CThreadPool_Ret::add.
+`CThreadPool::add_and_detach` is faster (very) than `CThreadPool_Ret::add`.
 # Performance comparison
 [progschj/ThreadPool](https://github.com/progschj/ThreadPool), see [Comparison](comparison/README.md#result).<br>
 [Tyler-Hardin/thread_pool](https://github.com/Tyler-Hardin/thread_pool), see [Comparison](comparison/README.md#result).<br>
@@ -43,8 +49,9 @@ P.S. [philipphenkel/threadpool](https://github.com/philipphenkel/threadpool) can
 P.S. [tghosgor/threadpool11](https://github.com/tghosgor/threadpool11) cannot pass testing, see [README](comparison/tghosgor/README.md#warning).<br>
 See the [directory](comparison/) for more details.
 # Compiler
-VC++ 14.2<br>
-or any compiler which supports C++14
+	Visual Studio 2017 15.5.5
+	g++ 7.2.1
+	clang++ 5.0.1
 # How to compile
 You have to download [my lib](https://github.com/Fdhvdu/lib) first.<br>
 The directory should be look like
@@ -64,16 +71,14 @@ The directory should be look like
 	    └── tutorial
 Don't forget to compile lib/src/CScopeGuard.cpp.
 # Compilation errors?
-Q: My compiler doesn't support C++14<br>
-A: Get a newer compiler version, such as GCC 5.3.0 or VC++ 14.2 (inside Visual Studio Community 2015 Update 2)<br><br>
-Q: Other problems<br>
-A: See [How to compile](https://github.com/Fdhvdu/ThreadPool/blob/master/README.md#how-to-compile) or email me
+See [How to compile](https://github.com/Fdhvdu/ThreadPool/blob/master/README.md#how-to-compile) or email me
 # Tutorial
 I provide [example.cpp](tutorial/example.cpp) and [example_ret.cpp](tutorial/example_ret.cpp) to help you understand how to use this powerful thread pool<br>
 To use [example.cpp](tutorial/example.cpp):<br>
-g++ -std=c++14 tutorial/example.cpp src/* ../lib/src/CScopeGuard.cpp<br>
+
+	g++ -std=c++17 tutorial/example.cpp src/* ../lib/src/CScopeGuard.cpp<br>
 To use [example_ret.cpp](tutorial/example_ret.cpp):<br>
-g++ -std=c++14 tutorial/example_ret.cpp src/IThreadPoolItemBase.cpp ../lib/src/CScopeGuard.cpp
+
+	g++ -std=c++17 tutorial/example_ret.cpp src/IThreadPoolItemBase.cpp ../lib/src/CScopeGuard.cpp
 # Future work
-replace std::bind in CThreadPool::add, CThreadPool::add_and_detach and CThreadPool_Ret::add with C++17 std::apply<br>
 work stealing