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Allow splicing more things in quotes

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Keegan McAllister 2014-06-20 18:36:21 -07:00 committed by Alex Crichton
parent 4e26e2d8ca
commit 26b2fa052f
1 changed files with 16 additions and 0 deletions
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16
src/libsyntax/ext/quote.rs
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@ -32,6 +32,7 @@ use std::gc::Gc;
pub mod rt {
use ast;
use codemap::Spanned;
use ext::base::ExtCtxt;
use parse::token;
use parse;
@ -48,12 +49,25 @@ pub mod rt {
fn to_tokens(&self, _cx: &ExtCtxt) -> Vec<TokenTree> ;
}
impl ToTokens for TokenTree {
fn to_tokens(&self, _cx: &ExtCtxt) -> Vec<TokenTree> {
vec!(self.clone())
}
}
impl ToTokens for Vec<TokenTree> {
fn to_tokens(&self, _cx: &ExtCtxt) -> Vec<TokenTree> {
(*self).clone()
}
}
impl<T: ToTokens> ToTokens for Spanned<T> {
fn to_tokens(&self, cx: &ExtCtxt) -> Vec<TokenTree> {
// FIXME: use the span?
self.node.to_tokens(cx)
}
}
/* Should be (when bugs in default methods are fixed):
trait ToSource : ToTokens {
@ -121,6 +135,7 @@ pub mod rt {
impl_to_source!(Generics, generics_to_str)
impl_to_source!(Gc<ast::Item>, item_to_str)
impl_to_source!(Gc<ast::Expr>, expr_to_str)
impl_to_source!(Gc<ast::Pat>, pat_to_str)
impl_to_source_slice!(ast::Ty, ", ")
impl_to_source_slice!(Gc<ast::Item>, "\n\n")
@ -207,6 +222,7 @@ pub mod rt {
impl_to_tokens!(ast::Ident)
impl_to_tokens!(Gc<ast::Item>)
impl_to_tokens!(Gc<ast::Pat>)
impl_to_tokens_lifetime!(&'a [Gc<ast::Item>])
impl_to_tokens!(ast::Ty)
impl_to_tokens_lifetime!(&'a [ast::Ty])