Struct salsa::InternId [−][src]
pub struct InternId { /* fields omitted */ }
The “raw-id” is used for interned keys in salsa – it is basically a newtype’d u32. Typically, it is wrapped in a type of your own devising. For more information about interned keys, see the interned key RFC.
Creating a InternId
InternId values can be constructed using the From
impls,
which are implemented for u32
and usize
:
let intern_id1 = InternId::from(22_u32); let intern_id2 = InternId::from(22_usize); assert_eq!(intern_id1, intern_id2);
Converting to a u32 or usize
Normally, there should be no need to access the underlying integer
in a InternId
. But if you do need to do so, you can convert to a
usize
using the as_u32
or as_usize
methods or the From
impls.
let intern_id = InternId::from(22_u32); let value = u32::from(intern_id); assert_eq!(value, 22);
Illegal values
Be warned, however, that InternId
values cannot be created from
arbitrary values – in particular large values greater than
InternId::MAX
will panic. Those large values are reserved so that
the Rust compiler can use them as sentinel values, which means
that (for example) Option<InternId>
is represented in a single
word.
InternId::from(InternId::MAX);
Implementations
impl InternId
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impl InternId
[src]pub const MAX: u32
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The maximum allowed InternId
. This value can grow between
releases without affecting semver.
pub fn as_u32(self) -> u32
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Convert this raw-id into a u32 value.
let intern_id = InternId::from(22_u32); let value = intern_id.as_usize(); assert_eq!(value, 22);
pub fn as_usize(self) -> usize
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Convert this raw-id into a usize value.
let intern_id = InternId::from(22_u32); let value = intern_id.as_usize(); assert_eq!(value, 22);
Trait Implementations
impl InternKey for InternId
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impl InternKey for InternId
[src]fn from_intern_id(v: InternId) -> InternId
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fn as_intern_id(&self) -> InternId
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impl PartialOrd<InternId> for InternId
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impl PartialOrd<InternId> for InternId
[src]impl StructuralEq for InternId
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impl StructuralEq for InternId
[src]impl StructuralPartialEq for InternId
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impl StructuralPartialEq for InternId
[src]Auto Trait Implementations
impl RefUnwindSafe for InternId
impl RefUnwindSafe for InternId
impl UnwindSafe for InternId
impl UnwindSafe for InternId