Struct swc_ecma_ast::Ident
source · [−]Expand description
A complete identifier with span.
Identifier of swc consists of two parts. The first one is symbol, which is stored using an interned string, JsWord . The second one is SyntaxContext, which can be used to distinguish identifier with same symbol.
Let me explain this with an example.
let a = 5
{
let a = 3;
}
In the code above, there are two variables with the symbol a.
Other compilers typically uses type like Scope
, and store them nested, but
in rust, type like Scope
requires [Arc<Mutexfoo#1
For the example above, after applying resolver pass, it becomes.
let a#1 = 5
{
let a#2 = 3;
}
Thanks to the tag
we attached, we can now distinguish them.
See Id, which is a type alias for this.
This can be used to store all variables in a module to single hash map.
Comparison
While comparing two identifiers, you can use .to_id()
.
HashMap
There’s a type named Id which only contains minimal information to distinguish identifiers.
Fields
span: Span
sym: JsWord
optional: bool
TypeScript only. Used in case of an optional parameter.
Implementations
Returns true if c
is a valid character for an identifier start.
Returns true if c
is a valid character for an identifier part after
start.
Trait Implementations
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
Auto Trait Implementations
impl RefUnwindSafe for Ident
impl UnwindSafe for Ident
Blanket Implementations
type ArchivedMetadata = ()
type ArchivedMetadata = ()
The archived version of the pointer metadata for this type.
pub fn pointer_metadata(
&<T as ArchivePointee>::ArchivedMetadata
) -> <T as Pointee>::Metadata
pub fn pointer_metadata(
&<T as ArchivePointee>::ArchivedMetadata
) -> <T as Pointee>::Metadata
Converts some archived metadata to the pointer metadata for itself.
The archived counterpart of this type. Unlike Archive
, it may be unsized. Read more
type MetadataResolver = ()
type MetadataResolver = ()
The resolver for the metadata of this type. Read more
pub unsafe fn resolve_metadata(
&self,
usize,
<T as ArchiveUnsized>::MetadataResolver,
*mut <<T as ArchiveUnsized>::Archived as ArchivePointee>::ArchivedMetadata
)
pub unsafe fn resolve_metadata(
&self,
usize,
<T as ArchiveUnsized>::MetadataResolver,
*mut <<T as ArchiveUnsized>::Archived as ArchivePointee>::ArchivedMetadata
)
Creates the archived version of the metadata for this value at the given position and writes it to the given output. Read more
Mutably borrows from an owned value. Read more
impl<F, W, T, D> Deserialize<With<T, W>, D> for F where
W: DeserializeWith<F, T, D>,
D: Fallible + ?Sized,
F: ?Sized,
impl<F, W, T, D> Deserialize<With<T, W>, D> for F where
W: DeserializeWith<F, T, D>,
D: Fallible + ?Sized,
F: ?Sized,
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more