fixup: file read example compilation

examples/read_file.cpp

@@ -53,22 +53,21 @@ void read_particles( const std::string filename, ParticleType& particles )
 
  auto px = particles.slice_x();
  auto pvol = particles.slice_vol();
- auto v = slice_v();
- auto f = slice_f();
- auto type = slice_type();
- auto rho = slice_rho();
- auto u = slice_u();
- auto nofail = slice_nofail();
+ auto v = particles.slice_v();
+ auto f = particles.slice_f();
+ auto type = particles.slice_type();
+ auto rho = particles.slice_rho();
+ auto u = particles.slice_u();
+ auto nofail = particles.slice_nofail();
 
  using exec_space = typename memory_space::execution_space;
  Kokkos::parallel_for(
- "copy_to_particles",
- Kokkos::RangePolicy<exec_space> policy( 0, x.size() ),
- KOKKOS_LAMBDA( const int i ) {
+ "copy_to_particles", Kokkos::RangePolicy<exec_space>( 0, x.size() ),
+ KOKKOS_LAMBDA( const int pid ) {
  // Set the particle position and volume.
- pvol( pid ) = vol( i );
- px( pid, 0 ) = x( i );
- px( pid, 1 ) = y( i );
+ pvol( pid ) = vol( pid );
+ px( pid, 0 ) = x( pid );
+ px( pid, 1 ) = y( pid );
 
  // Initialize everything else to zero.
  px( pid, 2 ) = 0.0;
@@ -154,9 +153,9 @@ int main( int argc, char* argv[] )
 
  // Read particles from file.
  std::string file_name = "file.csv";
- read_particles( file_name, particles );
+ read_particles( file_name, *particles );
  // Update after reading.
- particles.update_after_read( exec_space(), halo_width, num_cell );
+ particles->update_after_read( exec_space(), halo_width, num_cell );
 
  // Define particle initialization.
  auto x = particles->slice_x();