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Enable operator-sensitive extension of element-type promotion #12292

Merged
merged 3 commits into from
Jul 29, 2015
Merged

Enable operator-sensitive extension of element-type promotion #12292

merged 3 commits into from
Jul 29, 2015

Commits on Jul 29, 2015

  1. Add promote_op, which uses inference to determine types (fixes #8027) 

    promote_op(F, R, S) computes the output type of F(r, s), where
r::R and s::S. This fixes the problem that arises from relying
on promote_type(R, S) when the result type depends on F.
    @timholy
    timholy committed Jul 29, 2015
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  2. Don't use inference in promote_op, just fall back to promote_type. 

    Also adds developer documentation on overloading `promote_op`.
    @timholy
    timholy committed Jul 29, 2015
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  3. Switch promote_op implementations to static Functors

    @timholy
    timholy committed Jul 29, 2015
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