Remove deprecated lang items #44526
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Remove deprecated lang items #44526
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They have been deprecated for years and there is no trace left of them in the compiler.
It's unused and unnecessary
Small refactorings
Short and sweet
src/librustc/middle/lang_items.rs
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| pub fn require_owned_box(&self) -> Result<DefId, String> { | ||
| self.require(OwnedBoxLangItem) | ||
| self.items[it as usize].ok_or(format!("requires `{}` lang_item", it.name())) |
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Please make this an ok_or_else since otherwise we allocate a String each name, and also go through a lookup table to get the name of the lang item, both of which are somewhat expensive operations to do for lang item lookup.
src/librustc/middle/lang_items.rs
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| match Some(id) { | ||
| x if x == self.fn_trait() => Some(ty::ClosureKind::Fn), | ||
| x if x == self.fn_mut_trait() => Some(ty::ClosureKind::FnMut), | ||
| x if x == self.fn_once_trait() => Some(ty::ClosureKind::FnOnce), |
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nit: Extra space after the =>.
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@bors r+ |
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📌 Commit 9218e44 has been approved by |
aidanhs
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…ielb1 Remove deprecated lang items They have been deprecated for years and there is no trace left of them in the compiler. Also removed `require_owned_box` which is dead code and other small refactorings.
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☀️ Test successful - status-appveyor, status-travis |
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They have been deprecated for years and there is no trace left of them in the compiler. Also removed
require_owned_boxwhich is dead code and other small refactorings.