Code

Implement the ! type#35162

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bors merged 39 commits intorust-lang:masterrust-lang/rust:masterfrom canndrew:bang_type_coercedcanndrew/rust:bang_type_coercedCopy head branch name to clipboardAug 16, 2016

+899-705

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Commits on Aug 13, 2016

• Start implementation of RFC 1216 (make ! a type)

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• Parse ! as TyEmpty (except in fn return type)

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• Add EmptyToAny adjustment

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• Invoke coercions on !

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• Add run-fail/adjust_empty.rs test

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• Small optimization

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• Fix rustdoc after rebase

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• Switch on TyEmpty

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• Fix super_relate_tys so that ! == !

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• Make unused lint ignore unused !

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• impl Debug + Display for !

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• Remove obsolete divergence related stuff

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• Fix build after rebase to lastest master

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• implement std::cmp::* traits for !

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• Remove invalid compile-fail tests related to !

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• Make AdjustEmptyToAny actually perform the adjustment

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• Control usage of ! through a feature gate.

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• Minor fixups based on @eddyb's feedback

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• Rename empty/bang to never

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• Un-improve Ty::is_uninabited

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• Minor fix

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• Default diverging types based on feature gate.

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• Lookup node type in map rather than using write_ty_expr

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• Minor fixup.

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• Correctly handle AdjustNeverToAny in try_find_coercion_lub

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• Add run-pass/never_coercions.rs test

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• Minor fixups based on feedback

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• Revert Ty::is_uninhabited to its original state

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• Add some tests for ! type

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• Add tests for ! type

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• Add another test for !

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• Permit ! as T with test

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• Add explanations to tests

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• Fix make tidy

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• Improve comments on ! tests

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• Fix build after rebase

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• Fix bug in PostExpansionVisitor

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• Remove diagnostic E0166

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Commits on Aug 15, 2016

• Fix bug for ! in old trans

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