[WIP] handle higher order binary ops of mixed types #272
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This was referenced Mar 1, 2024
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See the test.
This is a MWE of something that occurs in the wild with Diffractor over ForwardDiff.
Apparently we are ADing a call to
-(::Dual, ::Float64)The change in this PR to make the special Diffractor only rules not allow this is correct.
However, this still failed because ChainRules.jl has the same rules.
So perhaps ChainRules.jl also needs a change to not do this.
(Or maybe ChainRulesCore to redefine the
@scalar_rulemacro so it only ever works on things of the same type)