[NameLookup] Prefer property wrapper over attached macro on local var #84854
+253 −102
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Introduce CustomAttrOwner that can store either a Decl for an attached attribute, or a DeclContext for e.g a type or closure attribute. Store this on CustomAttr such that we can query it from the name lookup requests.
We don't properly support peer declarations in local contexts, as such if we have both a property wrapper and macro with a given name on a local var, let's prefer the property wrapper. rdar://148782639
hamishknight requested review from AnthonyLatsis, CodaFi, DougGregor, Xazax-hun, beccadax, bnbarham, egorzhdan, fahadnayyar, hborla, ian-twilightcoder, j-hui, rintaro, slavapestov, susmonteiro, xedin, xymus and zoecarver as code owners 
| @swift-ci please test |
| @swift-ci please test source compatibility |
xedin approved these changes Oct 13, 2025
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We don't properly support peer declarations in local contexts, as such if we have both a property wrapper and macro with a given name on a local var, let's prefer the property wrapper.
rdar://148782639