ssprk22_step_2d Subroutine

public subroutine ssprk22_step_2d(state)

SSPRK(2,2) via the shared kernel (see rk4_step_2d notes). Q2a authorized last-bit change: the kernel's 1D-verbatim distributed stage groupings replace the legacy factored groupings (spec 2026-07-10 §5).

Arguments

Type	Intent	Optional	Attributes		Name
type(solver_state_2d_t),	intent(inout),		target	::	state