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E0122 "trait bounds are not (yet) enforced in type definitions" not triggered by where clauses #39122

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cjsut opened this issue Jan 17, 2017 · 2 comments
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E0122 "trait bounds are not (yet) enforced in type definitions" not triggered by where clauses #39122

cjsut opened this issue Jan 17, 2017 · 2 comments
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A-type-system Area: Type system E-help-wanted Call for participation: Help is requested to fix this issue. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@cjsut
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cjsut commented Jan 17, 2017 •
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As this playpen shows, diagnostic E0122 does not catch trait bounds introduced via where clauses.

Specifically,

type X<T: std::ops::Add> = T;

triggers a warning, but

type Y<T> where T: std::ops::Add = T;

does not.
@newpavlov newpavlov mentioned this issue Jan 17, 2017
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@brson brson added I-nominated T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jan 18, 2017
@brson
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brson commented Jan 18, 2017

Looks like something that should be locked down.

@brson brson added E-help-wanted Call for participation: Help is requested to fix this issue. A-type-system Area: Type system labels Jan 18, 2017
@circuitfox
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I think I'll take a shot at this.

@circuitfox circuitfox mentioned this issue Jan 18, 2017
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GuillaumeGomez added a commit to GuillaumeGomez/rust that referenced this issue Jan 19, 2017
@GuillaumeGomez
Rollup merge of rust-lang#39149 - circuitfox:E0122-type-def-trait-bou…
2c04475 
…nds-where-clause, r=arielb1

E0122 should apply with where clauses

Fixes rust-lang#39122
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A-type-system Area: Type system E-help-wanted Call for participation: Help is requested to fix this issue. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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