Merge pull request SciML#274 from SciML/retcode

Update return codes

Author: ChrisRackauckas

src/SSA_stepper.jl

@@ -304,7 +304,7 @@ function reset_aggregated_jumps!(integrator::SSAIntegrator, uprev = nothing)
     nothing
 end
 
-function DiffEqBase.terminate!(integrator::SSAIntegrator, retcode = :Terminated)
+function DiffEqBase.terminate!(integrator::SSAIntegrator, retcode = ReturnCode.Terminated)
     integrator.keep_stepping = false
     integrator.sol = DiffEqBase.solution_new_retcode(integrator.sol, retcode)
     nothing

test/extinction_test.jl

@@ -72,4 +72,4 @@ dprob = DiscreteProblem(u0, (0.0, 1000.0), rates)
 jprob = JumpProblem(dprob, Direct(), majump; save_positions = (false, false), rng = rng)
 sol = solve(jprob, SSAStepper(), callback = cb, save_end = false)
 @test sol[1, end] == 1
-@test sol.retcode == :Terminated
+@test sol.retcode == ReturnCode.Terminated