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Inline DebruijnIndex methods

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This commit is contained in:
Tomasz Miąsko 2022-07-15 00:00:00 +00:00
parent 41419e7036
commit bb73f171e5
1 changed files with 5 additions and 0 deletions
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5
compiler/rustc_type_ir/src/lib.rs
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@ -310,6 +310,7 @@ impl DebruijnIndex {
/// for<'a> fn(for<'b> fn(&'a x)) /// for<'a> fn(for<'b> fn(&'a x))
/// ///
/// you would need to shift the index for `'a` into a new binder. /// you would need to shift the index for `'a` into a new binder.
#[inline]
#[must_use] #[must_use]
pub fn shifted_in(self, amount: u32) -> DebruijnIndex { pub fn shifted_in(self, amount: u32) -> DebruijnIndex {
DebruijnIndex::from_u32(self.as_u32() + amount) DebruijnIndex::from_u32(self.as_u32() + amount)
@ -317,18 +318,21 @@ impl DebruijnIndex {
/// Update this index in place by shifting it "in" through /// Update this index in place by shifting it "in" through
/// `amount` number of binders. /// `amount` number of binders.
#[inline]
pub fn shift_in(&mut self, amount: u32) { pub fn shift_in(&mut self, amount: u32) {
*self = self.shifted_in(amount); *self = self.shifted_in(amount);
} }
/// Returns the resulting index when this value is moved out from /// Returns the resulting index when this value is moved out from
/// `amount` number of new binders. /// `amount` number of new binders.
#[inline]
#[must_use] #[must_use]
pub fn shifted_out(self, amount: u32) -> DebruijnIndex { pub fn shifted_out(self, amount: u32) -> DebruijnIndex {
DebruijnIndex::from_u32(self.as_u32() - amount) DebruijnIndex::from_u32(self.as_u32() - amount)
} }
/// Update in place by shifting out from `amount` binders. /// Update in place by shifting out from `amount` binders.
#[inline]
pub fn shift_out(&mut self, amount: u32) { pub fn shift_out(&mut self, amount: u32) {
*self = self.shifted_out(amount); *self = self.shifted_out(amount);
} }
@ -353,6 +357,7 @@ impl DebruijnIndex {
/// If we invoke `shift_out_to_binder` and the region is in fact /// If we invoke `shift_out_to_binder` and the region is in fact
/// bound by one of the binders we are shifting out of, that is an /// bound by one of the binders we are shifting out of, that is an
/// error (and should fail an assertion failure). /// error (and should fail an assertion failure).
#[inline]
pub fn shifted_out_to_binder(self, to_binder: DebruijnIndex) -> Self { pub fn shifted_out_to_binder(self, to_binder: DebruijnIndex) -> Self {
self.shifted_out(to_binder.as_u32() - INNERMOST.as_u32()) self.shifted_out(to_binder.as_u32() - INNERMOST.as_u32())
} }