From a28bda36efe705caac9a14ee35a5d8cf2b9d1361 Mon Sep 17 00:00:00 2001
From: JamesWrigley <james@puiterwijk.org>
Date: Thu, 27 Nov 2025 22:22:00 +0100
Subject: [PATCH 1/2] Add support for printing unsigned integers as decimals

---
 base/show.jl | 13 ++++++++++++-
 test/show.jl |  3 +++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/base/show.jl b/base/show.jl
index cb71376fedc68..b2b418fc24449 100644
--- a/base/show.jl
+++ b/base/show.jl
@@ -385,6 +385,11 @@ The following properties are in common use:
  - `:color`: Boolean specifying whether ANSI color/escape codes are supported/expected.
    By default, this is determined by whether `io` is a compatible terminal and by any
    `--color` command-line flag when `julia` was launched.
+ - `:hexunsigned`: Boolean specifying whether to print unsigned integers in
+   hexadecimal. Defaults to `true`, otherwise they will be printed in decimal.
+
+!!! compat "Julia 1.14"
+    The `:hexunsigned` option requires Julia 1.14 or later.
 
 # Examples
 
@@ -1293,7 +1298,13 @@ nonnothing_nonmissing_typeinfo(io::IO) = nonmissingtype(nonnothingtype(get(io, :
 show(io::IO, b::Bool) = print(io, nonnothing_nonmissing_typeinfo(io) === Bool ? (b ? "1" : "0") : (b ? "true" : "false"))
 show(io::IO, ::Nothing) = print(io, "nothing")
 show(io::IO, n::Signed) = (write(io, string(n)); nothing)
-show(io::IO, n::Unsigned) = print(io, "0x", string(n, pad = sizeof(n)<<1, base = 16))
+function show(io::IO, n::Unsigned)
+    if get(io, :hexunsigned, true)::Bool
+        print(io, "0x", string(n, pad = sizeof(n)<<1, base = 16))
+    else
+        print(io, string(n), "u")
+    end
+end
 print(io::IO, n::Unsigned) = print(io, string(n))
 
 has_tight_type(p::Pair) =
diff --git a/test/show.jl b/test/show.jl
index 3b3de18bde9c0..72a6a39bb52f6 100644
--- a/test/show.jl
+++ b/test/show.jl
@@ -1363,6 +1363,9 @@ end
     let repr = sprint(dump, Ptr{UInt8}(UInt(1)))
         @test repr == "Ptr{UInt8}($(Base.repr(UInt(1))))\n"
     end
+    let repr = sprint(show, UInt(42); context=(:hexunsigned => false))
+        @test repr == "42u"
+    end
     let repr = sprint(dump, Core.svec())
         @test repr == "empty SimpleVector\n"
     end

From f498e86887232aed87468e14305fa960334ae518 Mon Sep 17 00:00:00 2001
From: JamesWrigley <james@puiterwijk.org>
Date: Fri, 28 Nov 2025 19:33:22 +0100
Subject: [PATCH 2/2] fixup! Add support for printing unsigned integers as
 decimals

---
 base/show.jl | 6 +++++-
 test/show.jl | 5 ++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/base/show.jl b/base/show.jl
index b2b418fc24449..8b1169d876214 100644
--- a/base/show.jl
+++ b/base/show.jl
@@ -1302,7 +1302,11 @@ function show(io::IO, n::Unsigned)
     if get(io, :hexunsigned, true)::Bool
         print(io, "0x", string(n, pad = sizeof(n)<<1, base = 16))
     else
-        print(io, string(n), "u")
+        if get(io, :typeinfo, Nothing)::Type == typeof(n)
+            print(io, n)
+        else
+            print(io, typeof(n), "($(n))")
+        end
     end
 end
 print(io::IO, n::Unsigned) = print(io, string(n))
diff --git a/test/show.jl b/test/show.jl
index 72a6a39bb52f6..ef8310f043bf2 100644
--- a/test/show.jl
+++ b/test/show.jl
@@ -1364,7 +1364,10 @@ end
         @test repr == "Ptr{UInt8}($(Base.repr(UInt(1))))\n"
     end
     let repr = sprint(show, UInt(42); context=(:hexunsigned => false))
-        @test repr == "42u"
+        @test repr == "$(UInt)(42)"
+    end
+    let repr = sprint(show, UInt16[1, 2]; context=(:hexunsigned => false))
+        @test repr == "UInt16[1, 2]"
     end
     let repr = sprint(dump, Core.svec())
         @test repr == "empty SimpleVector\n"