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Add a way to conditionally compile things when a config item is _not_ present #1724

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brson opened this issue Feb 1, 2012 · 2 comments
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Add a way to conditionally compile things when a config item is _not_ present #1724

brson opened this issue Feb 1, 2012 · 2 comments
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A-attributes Area: Attributes (`#[…]`, `#![…]`) A-frontend Area: Compiler frontend (errors, parsing and HIR) E-easy Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.

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@brson
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brson commented Feb 1, 2012

A number of times I have wanted to use one function in one configuration in another in all other configurations. There's just no way to express this currently. A simple way to implement it would be with a #[notcfg(...)] attribute, which would just do the opposite of #[cfg(...)].
@graydon
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graydon commented Feb 15, 2012

Agreed. Have stubbed my toe on this a couple times now.

@brson brson mentioned this issue Apr 3, 2012
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@graydon
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graydon commented Apr 5, 2012

Subsumed in #2119, closing as duplicate.

@graydon graydon closed this as completed Apr 5, 2012
flip1995 pushed a commit to flip1995/rust that referenced this issue Mar 25, 2021
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Auto merge of rust-lang#6952 - Jarcho:new_ret_no_self_fp, r=Manishearth
4a1825a 
Fix `new_ret_no_self` false positive

fixes: rust-lang#1724

changelog: Fix false positive with `new_ret_no_self` when returning `Self` with different generic arguments
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A-attributes Area: Attributes (`#[…]`, `#![…]`) A-frontend Area: Compiler frontend (errors, parsing and HIR) E-easy Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.
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