# Complex where clause in promote\_rule

**URL:** <https://discourse.julialang.org/t/complex-where-clause-in-promote-rule/10156>\
**Category:** General Usage\
**Tags:** syntax\
**Created:** [April 4, 2018, 1:24pm UTC](https://discourse.julialang.org/t/complex-where-clause-in-promote-rule/10156 "2018-04-04T13:24:35Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![phlavenk](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/phlavenk/32/1873_2.png) [@phlavenk](https://discourse.julialang.org/u/phlavenk)\
**Post date:** [April 5, 2018, 7:14am UTC](https://discourse.julialang.org/t/complex-where-clause-in-promote-rule/10156/6 "2018-04-05T07:14:15Z")

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For my reference, discussion on Base.@pure black magick:  
[https://discourse.julialang.org/t/pure-macro/3871](https://discourse.julialang.org/t/pure-macro/3871)

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