[][src]Struct syn::LitStr

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.

Methods

impl LitStr
[src]

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.

Example

use proc_macro2::Span;
use syn::{Attribute, Error, Ident, Lit, Meta, MetaNameValue, Path, Result};

// Parses the path from an attribute that looks like:
//
//     #[path = "a::b::c"]
//
// or returns `None` if the input is some other attribute.
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))
        }
    }
}

Trait Implementations

impl Token for LitStr
[src]

impl Parse for LitStr
[src]

impl Clone for LitStr
[src]

Performs copy-assignment from source. Read more

impl From<LitStr> for Lit
[src]

impl Eq for LitStr
[src]

impl PartialEq<LitStr> for LitStr
[src]

This method tests for !=.

impl Debug for LitStr
[src]

impl Hash for LitStr
[src]

Feeds a slice of this type into the given [Hasher]. Read more

impl ToTokens for LitStr
[src]

Convert self directly into a TokenStream object. Read more

Auto Trait Implementations

impl !Send for LitStr

impl !Sync for LitStr

Blanket Implementations

impl<K> Token for K where
    K: CustomKeyword, 
[src]

impl<T> Spanned for T where
    T: ToTokens
[src]

impl<T> From for T
[src]

impl<T, U> Into for T where
    U: From<T>, 
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

impl<T, U> TryFrom for T where
    T: From<U>, 
[src]

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

impl<T> Borrow for T where
    T: ?Sized
[src]

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
[src]

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

impl<T> BorrowMut for T where
    T: ?Sized
[src]

impl<E> SpecializationError for E
[src]

impl<T> Erased for T
[src]

impl<T> Send for T where
    T: ?Sized
[src]

impl<T> Sync for T where
    T: ?Sized
[src]

impl<T> Erased for T