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//DIAGNOSTIC_TEST:SIMPLE:
struct DiffT : IDifferentiable
{
float f;
}
struct NoDiffField
{
DiffT fp;
}
[BackwardDifferentiable]
float g(float x)
{
NoDiffField obj;
obj.fp.f = x * x; // Error, this location cannot hold derivative.
return obj.fp.f;
}
[BackwardDifferentiable]
void diffOut(inout float x)
{
x = 2;
}
float noDiffFunc(float x)
{
return 0.0;
}
[BackwardDifferentiable]
float h(float x)
{
NoDiffField obj;
obj.fp.f = detach(x * x); // OK.
obj.fp.f = noDiffFunc(x); // OK.
diffOut(obj.fp.f); // Error.
return obj.fp.f;
}
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