Tape copy boxed values (#160)

* Tape copy boxed values

* Update Project.toml

Co-authored-by: Hong Ge <[email protected]>

Author: FredericWantiez

Project.toml

@@ -3,7 +3,7 @@ uuid = "6f1fad26-d15e-5dc8-ae53-837a1d7b8c9f"
 license = "MIT"
 desc = "Tape based task copying in Turing"
 repo = "https://github.com/TuringLang/Libtask.jl.git"
-version = "0.8.4"
+version = "0.8.5"
 
 [deps]
 FunctionWrappers = "069b7b12-0de2-55c6-9aab-29f3d0a68a2e"

src/tapedfunction.jl

@@ -476,9 +476,9 @@ function tape_shallowcopy end, function tape_deepcopy end
 
 tape_shallowcopy(x) = x
 tape_deepcopy(x) = deepcopy(x)
+
 # Core.Box is used as closure captured variable container, so we should tape_copy its contents
-tape_shallowcopy(x::Core.Box) = Core.Box(tape_shallowcopy(x.contents))
-tape_deepcopy(x::Core.Box) = Core.Box(tape_deepcopy(x.contents))
+_tape_copy(box::Core.Box, deepcopy_types) = Core.Box(_tape_copy(box.contents, deepcopy_types))
 
 function _tape_copy(v, deepcopy_types)
     if isa(v, deepcopy_types)