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Diffstat (limited to 'vendor/quote/src/ext.rs')
-rw-r--r-- | vendor/quote/src/ext.rs | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/vendor/quote/src/ext.rs b/vendor/quote/src/ext.rs deleted file mode 100644 index 92c2315..0000000 --- a/vendor/quote/src/ext.rs +++ /dev/null @@ -1,110 +0,0 @@ -use super::ToTokens; -use core::iter; -use proc_macro2::{TokenStream, TokenTree}; - -/// TokenStream extension trait with methods for appending tokens. -/// -/// This trait is sealed and cannot be implemented outside of the `quote` crate. -pub trait TokenStreamExt: private::Sealed { - /// For use by `ToTokens` implementations. - /// - /// Appends the token specified to this list of tokens. - fn append<U>(&mut self, token: U) - where - U: Into<TokenTree>; - - /// For use by `ToTokens` implementations. - /// - /// ``` - /// # use quote::{quote, TokenStreamExt, ToTokens}; - /// # use proc_macro2::TokenStream; - /// # - /// struct X; - /// - /// impl ToTokens for X { - /// fn to_tokens(&self, tokens: &mut TokenStream) { - /// tokens.append_all(&[true, false]); - /// } - /// } - /// - /// let tokens = quote!(#X); - /// assert_eq!(tokens.to_string(), "true false"); - /// ``` - fn append_all<I>(&mut self, iter: I) - where - I: IntoIterator, - I::Item: ToTokens; - - /// For use by `ToTokens` implementations. - /// - /// Appends all of the items in the iterator `I`, separated by the tokens - /// `U`. - fn append_separated<I, U>(&mut self, iter: I, op: U) - where - I: IntoIterator, - I::Item: ToTokens, - U: ToTokens; - - /// For use by `ToTokens` implementations. - /// - /// Appends all tokens in the iterator `I`, appending `U` after each - /// element, including after the last element of the iterator. - fn append_terminated<I, U>(&mut self, iter: I, term: U) - where - I: IntoIterator, - I::Item: ToTokens, - U: ToTokens; -} - -impl TokenStreamExt for TokenStream { - fn append<U>(&mut self, token: U) - where - U: Into<TokenTree>, - { - self.extend(iter::once(token.into())); - } - - fn append_all<I>(&mut self, iter: I) - where - I: IntoIterator, - I::Item: ToTokens, - { - for token in iter { - token.to_tokens(self); - } - } - - fn append_separated<I, U>(&mut self, iter: I, op: U) - where - I: IntoIterator, - I::Item: ToTokens, - U: ToTokens, - { - for (i, token) in iter.into_iter().enumerate() { - if i > 0 { - op.to_tokens(self); - } - token.to_tokens(self); - } - } - - fn append_terminated<I, U>(&mut self, iter: I, term: U) - where - I: IntoIterator, - I::Item: ToTokens, - U: ToTokens, - { - for token in iter { - token.to_tokens(self); - term.to_tokens(self); - } - } -} - -mod private { - use proc_macro2::TokenStream; - - pub trait Sealed {} - - impl Sealed for TokenStream {} -} |