Struct HexStr

pub struct HexStr {
    pub hex_token: hex,
    pub value: LitStr,
}

A hex string.

Fields

hex_token: hex

The prefix of the string.

value: LitStr

The string literal.

Methods from Deref<Target = LitStr>

pub fn value(&self) -> String

pub fn parse<T>(&self) -> Result<T, Error>

where T: Parse,

Available on crate feature parsing only.

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 syn::{Attribute, Error, Expr, Lit, Meta, 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);
    }

    if let Meta::NameValue(meta) = &attr.meta {
        if let Expr::Lit(expr) = &meta.value {
            if let Lit::Str(lit_str) = &expr.lit {
                return lit_str.parse().map(Some);
            }
        }
    }

    let message = "expected #[path = \"...\"]";
    Err(Error::new_spanned(attr, message))
}

pub fn parse_with<F>(&self, parser: F) -> Result<<F as Parser>::Output, Error>

where F: Parser,

Available on crate feature parsing only.

Invoke parser on the content of this string literal.

All spans in the syntax tree will point to the span of this LitStr.

Example

let lit_str: LitStr = /* ... */;

// Parse a string literal like "a::b::c" into a Path, not allowing
// generic arguments on any of the path segments.
let basic_path = lit_str.parse_with(syn::Path::parse_mod_style)?;

pub fn span(&self) -> Span

pub fn set_span(&mut self, span: Span)

pub fn suffix(&self) -> &str

pub fn token(&self) -> Literal

Trait Implementations

impl Clone for HexStr

fn clone(&self) -> HexStr

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for HexStr

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for HexStr

type Target = LitStr

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for HexStr

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl Parse for HexStr

fn parse(input: ParseStream<'_>) -> Result<Self>

impl Spanned for HexStr

fn span(&self) -> Span

Returns a Span covering the complete contents of this syntax tree node, or Span::call_site() if this node is empty.

fn set_span(&mut self, span: Span)

Sets the span of this syntax tree node if it is not empty.

fn with_span(self, span: Span) -> Self

where Self: Sized,

Sets the span of this owned syntax tree node if it is not empty.