Copyable buffer and eval options

Project.toml

@@ -1,7 +1,7 @@
 name = "DynamicExpressions"
 uuid = "a40a106e-89c9-4ca8-8020-a735e8728b6b"
 authors = ["MilesCranmer <miles.cranmer@gmail.com>"]
-version = "1.9.1"
+version = "1.9.2"
 
 [deps]
 ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"

src/Evaluate.jl

@@ -36,6 +36,10 @@ struct ArrayBuffer{A<:AbstractMatrix,R<:Base.RefValue{<:Integer}}
     index::R
 end
 
+function Base.copy(buffer::ArrayBuffer)
+    return ArrayBuffer(copy(buffer.array), Ref(buffer.index[]))
+end
+
 reset_index!(buffer::ArrayBuffer) = buffer.index[] = 0
 reset_index!(::Nothing) = nothing
 
@@ -117,6 +121,17 @@ end
 @unstable @inline _to_bool_val(x::Bool) = x ? Val(true) : Val(false)
 @inline _to_bool_val(::Val{T}) where {T} = Val(T::Bool)
 
+_copy(x) = copy(x)
+_copy(::Nothing) = nothing
+function Base.copy(eval_options::EvalOptions)
+    return EvalOptions(;
+        turbo=eval_options.turbo,
+        bumper=eval_options.bumper,
+        early_exit=eval_options.early_exit,
+        buffer=_copy(eval_options.buffer),
+    )
+end
+
 @unstable function _process_deprecated_kws(eval_options, deprecated_kws)
     turbo = get(deprecated_kws, :turbo, nothing)
     bumper = get(deprecated_kws, :bumper, nothing)

test/test_evaluation.jl

@@ -288,6 +288,36 @@ end
     @test_throws ArgumentError ex(randn(1, 5), OperatorEnum(); bad_arg=1)
 end
 
+@testitem "Test EvalOptions copy" begin
+    using DynamicExpressions
+    using DynamicExpressions: ArrayBuffer
+
+    # Test copying with various configurations
+    buffer = zeros(5, 10)
+    buffer_ref = Ref(0)
+    original = EvalOptions(;
+        turbo=true, bumper=false, early_exit=true, buffer=ArrayBuffer(buffer, buffer_ref)
+    )
+    copied = copy(original)
+
+    # Test that all fields are equal
+    @test copied.turbo == original.turbo
+    @test copied.bumper == original.bumper
+    @test copied.early_exit == original.early_exit
+    @test copied.buffer.array == original.buffer.array
+    @test copied.buffer.index[] == original.buffer.index[]
+
+    # Test that buffer is copied, not referenced
+    @test copied.buffer !== original.buffer
+    @test copied.buffer.array !== original.buffer.array
+    @test copied.buffer.index !== original.buffer.index
+
+    # Test without buffer
+    original_no_buffer = EvalOptions(; turbo=true, bumper=false, early_exit=true)
+    copied_no_buffer = copy(original_no_buffer)
+    @test copied_no_buffer.buffer === nothing
+end
+
 @testitem "Test Inf val" begin
     using DynamicExpressions