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Author: codenuri

decay1.cpp

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+/*
+* HOME       : ecourse.co.kr
+* EMAIL      : smkang @ codenuri.co.kr
+* COURSENAME : C++ Template Programming
+* MODULE     : decay1.cpp
+* Copyright (C) 2017 CODENURI Inc. All rights reserved.
+*/
+
+#include <iostream>
+#include <type_traits>
+using namespace std;
+
+// argument decay
+template<typename T> void foo(T arg) // int arg[3] = x;
+{
+	// T : int*
+	cout << typeid(T).name() << endl; // int*
+}
+
+template<typename T> void goo(T& arg) // T : int[3]    goo(int (&arg)[3])
+{
+	// T : int[3]
+	cout << typeid(T).name() << endl; // int[3]
+}
+
+int main()
+{
+	int x[3] = { 1,2,3 }; //int[3]
+
+	foo(x); //
+	goo(x);
+
+
+//	int y[3] = x; // error
+//	int* p = x;  // ¹è¿­ÀÇ ¿ä¼ÒÀÇ ÁÖ¼Ò..
+//	int(&r)[3] = x; // ok..
+
+
+}
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decay2.cpp

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+
+template<typename T> void foo(T a, T b)
+{
+}
+
+template<typename T> void goo(T& a, T& b)
+{
+}
+
+int main()
+{
+	// "orange" : const char [7] 
+	// "apple"  : const char [6] 
+	foo("orange", "apple"); // ok    foo( const char*, const char*)
+	goo("orange", "apple"); // error goo( const char [7], const char [6])
+}
+