Merge pull request #71 from aplavin/expr

fix constructorof(Expr)
JuliaObjects · Feb 23, 2023 · 19e8a6f · 19e8a6f
2 parents 852910c + 16e8066
commit 19e8a6f
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diff --git a/src/nonstandard.jl b/src/nonstandard.jl
@@ -52,3 +52,7 @@ constructorof(::Type{<:LinearAlgebra.Tridiagonal}) = tridiagonal_constructor
 linrange_constructor(start, stop, len, lendiv) = LinRange(start, stop, len)
 
 constructorof(::Type{<:LinRange}) = linrange_constructor
+
+### Expr: args get splatted
+# ::Expr annotation is to make it type-stable on Julia 1.3-
+constructorof(::Type{<:Expr}) = (head, args) -> Expr(head, args...)::Expr
diff --git a/test/runtests.jl b/test/runtests.jl
@@ -194,6 +194,10 @@ end
         @inferred constructorof(typeof(lr1))(getfields(lr2)...)
     end
 
+    @testset "Expr" begin
+        e = :(a + b)
+        @test e == @inferred constructorof(typeof(e))(getfields(e)...)
+    end
 end
 
 @testset "Anonymous function constructors" begin