g++ - Can we make automatic type casting possible in c++ for function argument, when the argument is not a built-in type?

Question

suppose I have in a file type.h

#ifdef DTYPE==FP16
typedef half Dtype;
#else
typdef float Dtype;
#endif

I have a function declaration in test.h

#include "type.h"
Dtype fill_data(Dtype *buff, Dtype alpha, int N);

and definition in test.c

#include "test.h"
Dtype fill_data(Dtype *buff, Dtype alpha, int N)
{
    int i;
    for (i = 0; i < N; ++i) X[i*] = ALPHA;
}

Now, another file uses that fill_data function and it is like this.

Dtype *buf1, alpha;
int n;
...

file_data(buf1, 1, n);

The second argument is integer 1 and the g++ complains it can't convert int to Dtype. When the code was declared and defined for float (instead of Dtype), g++ converted int to float using implicit conversion.
Can we let g++ do this implicit conversion when the argument is not a built-in type by specifying any compile option? Of course compiler error is removed if I used (Dtype)1 instead of 1.

question from:https://stackoverflow.com/questions/65931490/can-we-make-automatic-type-casting-possible-in-c-for-function-argument-when-t

Answer 1

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