Merge pull request #491 from SciML/kg/cbfix3

Adds is_integrator_adaptive to integrator interface

Author: ChrisRackauckas

src/callbacks.jl

@@ -765,7 +765,7 @@ end
 
 function apply_callback!(integrator,callback::Union{ContinuousCallback,VectorContinuousCallback},cb_time,prev_sign,event_idx)
 
-  if integrator.opts.adaptive
+  if isadaptive(integrator)
     set_proposed_dt!(integrator, max(nextfloat(integrator.opts.dtmin), callback.dtrelax * integrator.dt))
   end
 

src/integrator_interface.jl

@@ -574,3 +574,11 @@ function step!(integ::DEIntegrator, dt::Real, stop_at_tdt = false)
 end
 
 has_destats(i::DEIntegrator) = false
+
+"""
+    is_integrator_adaptive(i::DEIntegrator)
+
+Checks if the integrator is adaptive
+"""
+isadaptive(integrator::DEIntegrator) =
+        isdefined(integrator.opts, :adaptive) ? integrator.opts.adaptive : false