Trait quote::IdentFragment

source · 
pub trait IdentFragment {
    fn fmt(&self, f: &mut Formatter<'_>) -> Result;

    fn span(&self) -> Option<Span> { ... }
}
Expand description

Specialized formatting trait used by format_ident!.

Ident arguments formatted using this trait will have their r# prefix stripped, if present.

See format_ident! for more information.

Required Methods§

Format this value as an identifier fragment.

Provided Methods§

Span associated with this IdentFragment.

If non-None, may be inherited by formatted identifiers.

Examples found in repository?
src/runtime.rs (line 406)
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    pub fn span(&self) -> Option<Span> {
        self.0.span()
    }
More examples
Hide additional examples
src/ident_fragment.rs (line 25)
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    fn span(&self) -> Option<Span> {
        <T as IdentFragment>::span(*self)
    }

    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        IdentFragment::fmt(*self, f)
    }
}

impl<T: IdentFragment + ?Sized> IdentFragment for &mut T {
    fn span(&self) -> Option<Span> {
        <T as IdentFragment>::span(*self)
    }

    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        IdentFragment::fmt(*self, f)
    }
}

impl IdentFragment for Ident {
    fn span(&self) -> Option<Span> {
        Some(self.span())
    }

    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let id = self.to_string();
        if id.starts_with("r#") {
            fmt::Display::fmt(&id[2..], f)
        } else {
            fmt::Display::fmt(&id[..], f)
        }
    }
}

impl<T> IdentFragment for Cow<'_, T>
where
    T: IdentFragment + ToOwned + ?Sized,
{
    fn span(&self) -> Option<Span> {
        T::span(self)
    }

Implementations on Foreign Types§

Implementors§