Struct rustc_hir::hir::GenericArgs
source · pub struct GenericArgs<'hir> {
pub args: &'hir [GenericArg<'hir>],
pub bindings: &'hir [TypeBinding<'hir>],
pub parenthesized: GenericArgsParentheses,
pub span_ext: Span,
}
Fields§
§args: &'hir [GenericArg<'hir>]
The generic arguments for this path segment.
bindings: &'hir [TypeBinding<'hir>]
Bindings (equality constraints) on associated types, if present.
E.g., Foo<A = Bar>
.
parenthesized: GenericArgsParentheses
Were arguments written in parenthesized form Fn(T) -> U
?
This is required mostly for pretty-printing and diagnostics,
but also for changing lifetime elision rules to be “function-like”.
span_ext: Span
The span encompassing arguments and the surrounding brackets <>
or ()
Foo<A, B, AssocTy = D> Fn(T, U, V) -> W
^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^
Note that this may be:
- empty, if there are no generic brackets (but there may be hidden lifetimes)
- dummy, if this was generated while desugaring
Implementations§
source§impl<'hir> GenericArgs<'hir>
impl<'hir> GenericArgs<'hir>
pub const fn none() -> Self
pub fn inputs(&self) -> &[Ty<'hir>]
pub fn has_type_params(&self) -> bool
pub fn has_err(&self) -> bool
pub fn num_type_params(&self) -> usize
pub fn num_lifetime_params(&self) -> usize
pub fn has_lifetime_params(&self) -> bool
sourcepub fn num_generic_params(&self) -> usize
pub fn num_generic_params(&self) -> usize
This function returns the number of type and const generic params. It should only be used for diagnostics.
sourcepub fn span(&self) -> Option<Span>
pub fn span(&self) -> Option<Span>
The span encompassing the text inside the surrounding brackets.
It will also include bindings if they aren’t in the form -> Ret
Returns None
if the span is empty (e.g. no brackets) or dummy
sourcepub fn span_ext(&self) -> Option<Span>
pub fn span_ext(&self) -> Option<Span>
Returns span encompassing arguments and their surrounding <>
or ()
pub fn is_empty(&self) -> bool
Trait Implementations§
source§impl<'hir> Clone for GenericArgs<'hir>
impl<'hir> Clone for GenericArgs<'hir>
source§fn clone(&self) -> GenericArgs<'hir>
fn clone(&self) -> GenericArgs<'hir>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl<'hir> Debug for GenericArgs<'hir>
impl<'hir> Debug for GenericArgs<'hir>
source§impl<'hir, __CTX> HashStable<__CTX> for GenericArgs<'hir>where
__CTX: HashStableContext,
impl<'hir, __CTX> HashStable<__CTX> for GenericArgs<'hir>where __CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
impl<'hir> Copy for GenericArgs<'hir>
Auto Trait Implementations§
impl<'hir> RefUnwindSafe for GenericArgs<'hir>
impl<'hir> !Send for GenericArgs<'hir>
impl<'hir> !Sync for GenericArgs<'hir>
impl<'hir> Unpin for GenericArgs<'hir>
impl<'hir> UnwindSafe for GenericArgs<'hir>
Blanket Implementations§
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Layout§
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.
Size: 48 bytes