Clarify that {self} imports require a module parent#2221
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traviscross wants to merge 2 commits intomasterfrom
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Clarify that {self} imports require a module parent#2221traviscross wants to merge 2 commits intomasterfrom
{self} imports require a module parent#2221traviscross wants to merge 2 commits intomasterfrom
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The `self` keyword in a use brace (e.g., `use m::{self}`) creates a
binding for the parent entity. The note in `items.use.self.intro`
says that `self` "means the current module of the parent segment", but
there's no rule restricting what the parent can be.
The parent path must resolve to a module, enumeration, or trait --
i.e., entities that act as modules for name resolution. Using `self`
with other entities such as structs or unions is rejected by the
compiler (as of rust-lang/rust#152996).
Let's add a rule to make this restriction explicit.
In the prior commit, we added a link reference definition for "brace syntax". Let's update the other use in the chapter to use that.
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The
selfkeyword in a use brace (e.g.,use m::{self}) creates a binding for the parent entity. The note initems.use.self.introsays thatself"means the current module of the parent segment", but there's no rule restricting what the parent can be.The parent path must resolve to a module, enumeration, or trait -- i.e., entities that act as modules for name resolution. Using
selfwith other entities such as structs or unions is rejected by the compiler (as of rust-lang/rust#152996).Let's add a rule to make this restriction explicit.
See:
selfoverwriting with proper resolution rust#152996cc @ehuss @mu001999 @petrochenkov