C ++宏-传递字符串并用作变量名

Question

So i'm working on a small hobby project which i have implemented a very basic reflection of enums. I have come across an issue which i'm struggling to find a solution.

This would be an ideal call which i'm looking for

    Reflect_Value("TestStringName", "StringValue")

the first parameter is a string which is intended to be appended onto a variable name and the second to be the actual string value

#define Reflect_Value(name,t)   \
namespace Reflection {          \
static ReflectedObject object_##name = ReflectedObject(name,t); }\

now the macro would then take that first parameter and be used as object_TestStringName but when i pass the string in the code evaluates to object_"TestStringName" which doesn't compile.

What am i doing wrong here or can anyone provide any solutions to how i could get this functionality please. its important to have the name be something i guess recognisable and also unique so i can reflect many objects

Thanks

Answer 1

I think you can do what you want with the stringification operator # :

#define Reflect_Value(name,t)   \
namespace Reflection {          \
static ReflectedObject object_##name = ReflectedObject( #name, #t ); }\

You'd then call the macro with unquoted arguments:

Reflect_Value(TestStringName, StringValue)

Answer 2

Don't pass a string, but stringize it:

#define stringize(name) #name
#define Reflect_Value(name,t)   \
namespace Reflection {          \
static ReflectedObject object_##name = ReflectedObject(stringize (name),t); }

Then:

Reflect_Value(TestStringName, "StringValue")