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infer_return_type: simplify definition, use less-private interface #12

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infer_return_type: simplify definition, use less-private interface #12

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14 changes: 5 additions & 9 deletions src/internals.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -2,18 +2,14 @@ module Internals

import StableTasks: @spawn, @spawnat, @fetch, @fetchfrom, StableTask, AtomicRef

if (
(@isdefined Core) &&
(Core isa Module) &&
isdefined(Core, :Compiler) &&
(Core.Compiler isa Module) &&
isdefined(Core.Compiler, :return_type) &&
applicable(Core.Compiler.return_type, identity, Tuple{})
const infer_return_type = if (
isdefined(Base, :promote_op) &&
applicable(Base.promote_op, rand)
)
infer_return_type(@nospecialize f::Any) = Core.Compiler.return_type(f, Tuple{})
Base.promote_op
else
# safe conservative fallback to `Any`, which is subtyped by each type
infer_return_type(@nospecialize f::Any) = Any
Returns(Any)
end

Base.getindex(r::AtomicRef) = @atomic r.x
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