pub struct LitStr { /* fields omitted */ }
A UTF-8 string literal: "foo"
.
This type is available if Syn is built with the "derive"
or
"full"
feature.
Parse a syntax tree node from the content of this string literal.
All spans in the syntax tree will point to the span of this LitStr
.
use proc_macro2::Span;
use syn::{Attribute, Error, Ident, Lit, Meta, MetaNameValue, Path, Result};
fn get_path(attr: &Attribute) -> Result<Option<Path>> {
if !attr.path.is_ident("path") {
return Ok(None);
}
match attr.parse_meta()? {
Meta::NameValue(MetaNameValue { lit: Lit::Str(lit_str), .. }) => {
lit_str.parse().map(Some)
}
_ => {
let error_span = attr.bracket_token.span;
let message = "expected #[path = \"...\"]";
Err(Error::new(error_span, message))
}
}
}
This method tests for self
and other
values to be equal, and is used by ==
. Read more
This method tests for !=
.
Performs copy-assignment from source
. Read more
Formats the value using the given formatter. Read more
Feeds this value into the given [Hasher
]. Read more
Feeds a slice of this type into the given [Hasher
]. Read more
Write self
to the given TokenStream
. Read more
Convert self
directly into a TokenStream
object. Read more
Returns a Span
covering the complete contents of this syntax tree node, or [Span::call_site()
] if this node is empty. Read more
Creates owned data from borrowed data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static