https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67358
Bug ID: 67358
Summary: const makes the code behavior changes
Product: gcc
Version: 5.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: liweifriends at gmail dot com
Target Milestone: ---
#include <iostream>
#include <map>
#include <string>
using namespace std;
struct LoadModel;
template<typename T>
class Hello
{
public:
template<typename TLayerOp, typename...TArgs>
friend void LayerOperation(TLayerOp*,
Hello& p_layer,
TArgs&&...args)
{
cout << 10 << endl;
}
friend void LayerOperation(LoadModel*,
Hello& p_layer,
int& p)
{
cout << 20 << endl;
}
};
int main()
{
int p;
Hello<bool> h;
LayerOperation(static_cast<LoadModel*>(nullptr), h, p);
}
Currently, the code output 20, means the second LayerOperation function is
invoked.
But if I modify its third parameter as follows:
friend void LayerOperation(LoadModel*,
Hello& p_layer,
const int& p)
{
cout << 20 << endl;
}
The code will output 10, means the first LayerOperation function is invoked.
Is this a feature or a bug?
