DPCT1055

Message

Vector types with size 1 are migrated to the corresponding fundamental types, which cannot be inherited. You need to rewrite the code.

Detailed Help

The warning message is emitted when vector type with size 1 is inherited by a class or struct in the original code. Since the vector type with size 1 is migrated to the corresponding fundamental type in DPC++ and the fundamental type cannot be inherited, you need to rewrite the code.

Suggestions to Fix

You can declare a new field with the corresponding fundamental type, for example int for int1, in the class/struct and override the required operators.

For example, this original CUDA* code:

class MyClass : int1 {
  ...
};

results in the following migrated SYCL* code:

/*
DPCT1055:0: Vector types with size 1 are migrated to the corresponding
fundamental types, which cannot be inherited. You need to rewrite the code.
*/
class MyClass : int {
  ...
};

which is rewritten to:

class MyClass {
public:
  int x;
  MyClass operator+(const MyClass& y) { ... }
  MyClass operator=(const MyClass& y) { ... }
  ...
};