Define helper functions for CUDA Kernel

[JerryI]

Hi there,

I faced an issue when tried to define a helper function for my CUDA Kernel like

inline __host__ __device__ float4 operator+(float4 a, float4 b)
{
    return make_float4(a.x + b.x, a.y + b.y, a.z + b.z,  a.w + b.w);
}

And then got

input_line_11:3:1: error: function definition is not allowed here
{

Is it a drawback of a runtime CUDA compilation?

Btw/ This is an amazing project! Thanks a lot

[SimeonEhrig]

Btw/ This is an amazing project! Thanks a lot

Thanks.

No the problem is that the meta parser[1] use a hacked for the moment. It is looking if a function definition is starting with __host__, __global__ or __host__. Try to remove the inline first and if it is working add it after the __host__ or __device__.

[1] The meta parser is a parser running before normal parser. We use it do some cling specific stuff, like allowing to call a function from the global namespace. Unfortunately we cannot use the clang C++ parser yet, therefore the meta parser is something self implemented and not so powerful like the Clang parser. But we are working on it in clang-repl project.