o3de-azslc/tests/Advanced/function-overloading.azsl

int g_func(int i)
{
    return i;
}

float g_func(float f)
{
    return f > 0 ? 0 : 1;
}

float4 main() : SV_Target0
{
    int   i = g_func((int)1); // reference to symbol at line 1
    float f = g_func(1.5);  // reference to symbol at line 6 (because 1.5 is a float in HLSL)
    float f2 = g_func(1.5L);  // L is the suffix for double in HLSL. DXC may be able to do the implicit conversion, but AZSLc cannot.
                              // hence, the reference here will fallback to the overload-set (unsolved symbol representing the g_func family)

    return float4(f,0,0,1);
}

void f(int,float);
void f(int);

void g()
{
    f();  // fallback
    f(1+1);  // matches l22 by arity
    f(1+1, lerp(0.0, 1.0, 0.5));  // matches l21 by arity
}