[][src]Struct syn::Path

pub struct Path {
    pub leading_colon: Option<Colon2>,
    pub segments: Punctuated<PathSegment, Colon2>,
}

A path at which a named item is exported (e.g. std::collections::HashMap).

This type is available only if Syn is built with the "derive" or "full" feature.

Fields

leading_colon: Option<Colon2>segments: Punctuated<PathSegment, Colon2>

Implementations

impl Path[src]

pub fn parse_mod_style(input: ParseStream<'_>) -> Result<Self>[src]

Parse a Path containing no path arguments on any of its segments.

This function is available only if Syn is built with the "parsing" feature.

Example

use syn::{Path, Result, Token};
use syn::parse::{Parse, ParseStream};

// A simplified single `use` statement like:
//
//     use std::collections::HashMap;
//
// Note that generic parameters are not allowed in a `use` statement
// so the following must not be accepted.
//
//     use a::<b>::c;
struct SingleUse {
    use_token: Token![use],
    path: Path,
}

impl Parse for SingleUse {
    fn parse(input: ParseStream) -> Result<Self> {
        Ok(SingleUse {
            use_token: input.parse()?,
            path: input.call(Path::parse_mod_style)?,
        })
    }
}

pub fn is_ident<I: ?Sized>(&self, ident: &I) -> bool where
    Ident: PartialEq<I>, 
[src]

Determines whether this is a path of length 1 equal to the given ident.

For them to compare equal, it must be the case that:

  • the path has no leading colon,
  • the number of path segments is 1,
  • the first path segment has no angle bracketed or parenthesized path arguments, and
  • the ident of the first path segment is equal to the given one.

This function is available only if Syn is built with the "parsing" feature.

Example

use syn::{Attribute, Error, Meta, NestedMeta, Result};

fn get_serde_meta_items(attr: &Attribute) -> Result<Vec<NestedMeta>> {
    if attr.path.is_ident("serde") {
        match attr.parse_meta()? {
            Meta::List(meta) => Ok(Vec::from_iter(meta.nested)),
            bad => Err(Error::new_spanned(bad, "unrecognized attribute")),
        }
    } else {
        Ok(Vec::new())
    }
}

pub fn get_ident(&self) -> Option<&Ident>[src]

If this path consists of a single ident, returns the ident.

A path is considered an ident if:

  • the path has no leading colon,
  • the number of path segments is 1, and
  • the first path segment has no angle bracketed or parenthesized path arguments.

This function is available only if Syn is built with the "parsing" feature.

Trait Implementations

impl Clone for Path[src]

impl Debug for Path[src]

impl Eq for Path[src]

impl From<Path> for Meta[src]

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

impl Hash for Path[src]

impl Parse for Path[src]

impl PartialEq<Path> for Path[src]

impl ToTokens for Path[src]

Auto Trait Implementations

impl RefUnwindSafe for Path

impl !Send for Path

impl !Sync for Path

impl Unpin for Path

impl UnwindSafe for Path

Blanket Implementations

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

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

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

impl<T> From<T> for T[src]

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

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

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

type Owned = T

The resulting type after obtaining ownership.

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

type Error = Infallible

The type returned in the event of a conversion error.

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

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.