From 64875222df79a7f11d29a4b5c4c9969a6aa63fea Mon Sep 17 00:00:00 2001
From: Jakob Nybo Nissen <jakobnybonissen@gmail.com>
Date: Tue, 27 Feb 2024 14:14:13 +0100
Subject: [PATCH 1/2] Make dump print `const` before const fields

This provides more information to the user when dumping types, and also makes the
output of dump slightly more similar to the type definition syntax.

Before:
```
julia> dump(BitSet)
BitSet <: AbstractSet{Int64}
  bits::Vector{UInt64}
  offset::Int64
```

After:
```
julia> dump(BitSet)
BitSet <: AbstractSet{Int64}
  const bits::Vector{UInt64}
  offset::Int64
```
---
 base/show.jl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/base/show.jl b/base/show.jl
index 217b22ab39ef8..e40b59c6af764 100644
--- a/base/show.jl
+++ b/base/show.jl
@@ -3007,7 +3007,9 @@ function dump(io::IOContext, x::DataType, n::Int, indent)
         fieldtypes = datatype_fieldtypes(x)
         for idx in 1:length(fields)
             println(io)
-            print(io, indent, "  ", fields[idx])
+            print(io, indent, "  ")
+            isconst(x, idx) && print(io, "const ")
+            print(io, fields[idx])
             if isassigned(fieldtypes, idx)
                 print(io, "::")
                 print(tvar_io, fieldtypes[idx])

From 582872ba023729dad9fe7423e49b9dbb088f5922 Mon Sep 17 00:00:00 2001
From: Shuhei Kadowaki <aviatesk@gmail.com>
Date: Wed, 28 Feb 2024 14:47:49 +0900
Subject: [PATCH 2/2] fix the show.jl test case

---
 test/show.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/show.jl b/test/show.jl
index 064ae76b6fe1f..7aa0d5adbb0c5 100644
--- a/test/show.jl
+++ b/test/show.jl
@@ -1263,7 +1263,7 @@ let repr = sprint(dump, :(x = 1))
     @test repr == "Expr\n  head: Symbol =\n  args: Array{Any}((2,))\n    1: Symbol x\n    2: $Int 1\n"
 end
 let repr = sprint(dump, Pair{String,Int64})
-    @test repr == "Pair{String, Int64} <: Any\n  first::String\n  second::Int64\n"
+    @test repr == "Pair{String, Int64} <: Any\n  const first::String\n  const second::Int64\n"
 end
 let repr = sprint(dump, Tuple)
     @test repr == "Tuple <: Any\n"