add has_init

Project.toml

@@ -1,7 +1,7 @@
 name = "SciMLBase"
 uuid = "0bca4576-84f4-4d90-8ffe-ffa030f20462"
+version = "2.122.0"
 authors = ["Chris Rackauckas <[email protected]> and contributors"]
-version = "2.121.1"
 
 [deps]
 ADTypes = "47edcb42-4c32-4615-8424-f2b9edc5f35b"
@@ -28,6 +28,7 @@ RecursiveArrayTools = "731186ca-8d62-57ce-b412-fbd966d074cd"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 RuntimeGeneratedFunctions = "7e49a35a-f44a-4d26-94aa-eba1b4ca6b47"
 SciMLOperators = "c0aeaf25-5076-4817-a8d5-81caf7dfa961"
+SciMLPublic = "431bcebd-1456-4ced-9d72-93c2757fff0b"
 SciMLStructures = "53ae85a6-f571-4167-b2af-e1d143709226"
 StaticArraysCore = "1e83bf80-4336-4d27-bf5d-d5a4f845583c"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
@@ -82,8 +83,8 @@ ConstructionBase = "1.5"
 Distributed = "1.10"
 Distributions = "0.25"
 DocStringExtensions = "0.9"
-Enzyme = "0.13"
 EnumX = "1"
+Enzyme = "0.13"
 ForwardDiff = "0.10.36, 1"
 FunctionWrappersWrappers = "0.1.3"
 IteratorInterfaceExtensions = "^1"
@@ -110,6 +111,7 @@ Reexport = "1"
 ReverseDiff = "1"
 RuntimeGeneratedFunctions = "0.5.12"
 SciMLOperators = "1.3"
+SciMLPublic = "1.0.0"
 SciMLStructures = "1.1"
 StableRNGs = "1.0"
 StaticArrays = "1.7"

docs/src/interfaces/Algorithms.md

@@ -35,6 +35,8 @@ SciMLBase.isadaptive
 SciMLBase.isdiscrete
 SciMLBase.forwarddiffs_model
 SciMLBase.forwarddiffs_model_time
+SciMLBase.has_init
+SciMLBase.has_step
 ```
 
 ### Abstract SciML Algorithms

src/SciMLBase.jl

@@ -46,6 +46,8 @@ import SciMLOperators:
 
 @reexport using SciMLOperators
 
+using SciMLPublic: @public
+
 function __solve end
 function __init end
 
@@ -930,4 +932,9 @@ export Clocks, TimeDomain, is_discrete_time_domain, isclock, issolverstepclock,
 
 export ODEAliasSpecifier, LinearAliasSpecifier
 
+# Public traits
+
+@public has_init
+@public has_step
+
 end

src/alg_traits.jl

@@ -299,8 +299,23 @@ allows_late_binding_tstops(alg::AbstractODEAlgorithm) = false
 """
     $(TYPEDSIGNATURES)
 
-Trait declaration for whether the optimization algorithm supports the `init` interface. 
+Trait declaration for whether the optimization algorithm supports the `init` interface.
 
 Deprecated as this is not an optimization-specific idea and should use the traits for general caching.
 """
 supports_opt_cache_interface(alg) = false
+
+"""
+    $(TYPEDSIGNATURES)
+
+Trait for specifying whether the passed algorithm supports `init`. Any `init`ed object can `solve!`.
+"""
+has_init(a::AbstractSciMLAlgorithm) = false
+
+"""
+    $(TYPEDSIGNATURES)
+
+Trait for specifying whether the passed algorithm supports `step!`, specifying a more direct control over the internal solver process.
+See https://docs.sciml.ai/SciMLBase/stable/interfaces/Init_Solve/#init-and-the-Iterator-Interface for more details.
+"""
+has_step(a::AbstractSciMLAlgorithm) = false

src/integrator_interface.jl

@@ -83,7 +83,7 @@ end
 """
     ratenoise_cache(integrator::DEIntegrator)
 
-Returns cache arrays for rate noise in stochastic differential equations. 
+Returns cache arrays for rate noise in stochastic differential equations.
 Returns an empty tuple by default for deterministic problems.
 """
 ratenoise_cache(i::DEIntegrator) = ()