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make compact type alias output more compact #39256

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Jan 29, 2021
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make compact type alias output more compact #39256

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make compact type alias output more compact
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@JeffBezanson
JeffBezanson committed Jan 28, 2021
commit 0db987728dd001423f05aeb2bf0650beeeefbd45
14 changes: 9 additions & 5 deletions base/show.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -789,15 +789,19 @@ function show_unionaliases(io::IO, x::Union)
end

function show(io::IO, ::MIME"text/plain", @nospecialize(x::Type))
show(io, x)
if !print_without_params(x) && get(io, :compact, true)
if !print_without_params(x)
properx = makeproper(io, x)
if make_typealias(properx) !== nothing || (unwrap_unionall(x) isa Union && x <: make_typealiases(properx)[2])
print(io, " (alias for ")
show(IOContext(io, :compact => false), x)
print(io, ")")
show(IOContext(io, :compact => true), x)
if !(get(io, :compact, false)::Bool)
print(io, " (alias for ")
show(IOContext(io, :compact => false), x)
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print(io, ")")
end
return
end
end
show(io, x)
# give a helpful hint for function types
if x isa DataType && x !== UnionAll && !(get(io, :compact, false)::Bool)
tn = x.name::Core.TypeName
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