Make repr(::Ptr) parsable Julia code. (#54305)

base/show.jl

@@ -1253,8 +1253,6 @@ 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))
 print(io::IO, n::Unsigned) = print(io, string(n))
 
-show(io::IO, p::Ptr) = print(io, typeof(p), " @0x$(string(UInt(p), base = 16, pad = Sys.WORD_SIZE>>2))")
-
 has_tight_type(p::Pair) =
     typeof(p.first)  == typeof(p).parameters[1] &&
     typeof(p.second) == typeof(p).parameters[2]

test/show.jl

@@ -1291,7 +1291,7 @@ end
               repr == "Union{String, $(curmod_prefix)M30442.T}"
     end
     let repr = sprint(dump, Ptr{UInt8}(UInt(1)))
-        @test repr == "Ptr{UInt8} @$(Base.repr(UInt(1)))\n"
+        @test repr == "Ptr{UInt8}($(Base.repr(UInt(1))))\n"
     end
     let repr = sprint(dump, Core.svec())
         @test repr == "empty SimpleVector\n"
@@ -2695,6 +2695,10 @@ let lowered = Meta.lower(Main, Expr(:let, Expr(:block), Expr(:block, Expr(:tople
     @test contains(sprint(show, ci), "_1 = 1")
 end
 
+# Pointers should be reprable
+@test is_juliarepr(pointer([1]))
+@test is_juliarepr(Ptr{Vector{Complex{Float16}}}(UInt(0xdeadbeef)))
+
 # Toplevel MethodInstance with undef :uninferred
 let topmi = ccall(:jl_new_method_instance_uninit, Ref{Core.MethodInstance}, ());
     topmi.specTypes = Tuple{}