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Propose more relaxtions to closure catpures#16
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Breif details about implementation: - Instead of pre-initializing `closure_captured` and `upvars_capture_map` using `upvars_mentioned` we will be rely on use within the closure. This will be handled as part of #7 - For coercing a closure to FnPtr, instead of relying on `upvars_mentioned` in typechk we will accept such code in typechk while setting a no-capture obligation that will be validated in trait selection post capture analysis.
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Once this is accepted here, we probably want to open an issue on rust-lang/rust as well |
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Conceptually this is a result of capturing based on the use of variables from the enclosing environment of the closure instead of based on variables that appear within the closure.
Breif details about implementation:
closure_captures,upvars_capture_mapandClosureSubstsusingupvars_mentionedwe will rely on expressions/ Places being used within the closure. This will be handled as part of Use hir::Place in closure_captures #7 Always make the "upvar types" a tuple of the actual upvar types (Parent issue#53488) #4upvars_mentionedin typechk we will accept such code in typechk while setting a no-capture obligation that will be validated in trait selection post capture analysis.Rendered
cc: @rust-lang/wg-rfc-2229