Trait quote::ToTokens

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pub trait ToTokens {
    // Required method
    fn to_tokens(&self, tokens: &mut TokenStream);

    // Provided methods
    fn to_token_stream(&self) -> TokenStream { ... }
    fn into_token_stream(self) -> TokenStream
       where Self: Sized { ... }
}
Expand description

Types that can be interpolated inside a quote! invocation.

Required Methods§

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fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream.

The token append methods provided by the TokenStreamExt extension trait may be useful for implementing ToTokens.

Example

Example implementation for a struct representing Rust paths like std::cmp::PartialEq:

use proc_macro2::{TokenTree, Spacing, Span, Punct, TokenStream};
use quote::{TokenStreamExt, ToTokens};

pub struct Path {
    pub global: bool,
    pub segments: Vec<PathSegment>,
}

impl ToTokens for Path {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        for (i, segment) in self.segments.iter().enumerate() {
            if i > 0 || self.global {
                // Double colon `::`
                tokens.append(Punct::new(':', Spacing::Joint));
                tokens.append(Punct::new(':', Spacing::Alone));
            }
            segment.to_tokens(tokens);
        }
    }
}

Provided Methods§

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fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object.

This method is implicitly implemented using to_tokens, and acts as a convenience method for consumers of the ToTokens trait.

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fn into_token_stream(self) -> TokenStreamwhere Self: Sized,

Convert self directly into a TokenStream object.

This method is implicitly implemented using to_tokens, and acts as a convenience method for consumers of the ToTokens trait.

Implementations on Foreign Types§

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impl<'a, T: ?Sized + ToTokens> ToTokens for &'a T

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for char

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl<'a, T: ?Sized + ToTokens> ToTokens for &'a mut T

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for u64

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for i16

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl<T: ?Sized + ToTokens> ToTokens for Rc<T>

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for f64

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for i128

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl<'a, T: ?Sized + ToOwned + ToTokens> ToTokens for Cow<'a, T>

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for Punct

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for f32

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for u8

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl<T: ToTokens> ToTokens for Option<T>

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for Literal

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for bool

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for Ident

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for i32

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for i64

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for String

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for u128

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for str

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for TokenTree

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fn to_tokens(&self, dst: &mut TokenStream)

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impl<T: ?Sized + ToTokens> ToTokens for Box<T>

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for usize

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for u16

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for i8

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for TokenStream

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impl ToTokens for u32

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for isize

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fn to_tokens(&self, tokens: &mut TokenStream)

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impl ToTokens for Group

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fn to_tokens(&self, tokens: &mut TokenStream)

Implementors§