New upstream version 1.56.0~beta.4+dfsg1

[rustc.git] / compiler / rustc_ast_pretty / src / pprust / mod.rs

diff --git a/compiler/rustc_ast_pretty/src/pprust/mod.rs b/compiler/rustc_ast_pretty/src/pprust/mod.rs
index 976725b308e02d6f2631b79db7f29c519acd4e93..e74f38dd89c35c4a34bb572b5c34070bdeb89594 100644 (file)
--- a/compiler/rustc_ast_pretty/src/pprust/mod.rs
+++ b/compiler/rustc_ast_pretty/src/pprust/mod.rs
@@ -8,17 +8,19 @@ use rustc_ast as ast;
 use rustc_ast::token::{Nonterminal, Token, TokenKind};
 use rustc_ast::tokenstream::{TokenStream, TokenTree};
 
+use std::borrow::Cow;
+
 pub fn nonterminal_to_string(nt: &Nonterminal) -> String {
     State::new().nonterminal_to_string(nt)
 }
 
 /// Print the token kind precisely, without converting `$crate` into its respective crate name.
-pub fn token_kind_to_string(tok: &TokenKind) -> String {
+pub fn token_kind_to_string(tok: &TokenKind) -> Cow<'static, str> {
     State::new().token_kind_to_string(tok)
 }
 
 /// Print the token precisely, without converting `$crate` into its respective crate name.
-pub fn token_to_string(token: &Token) -> String {
+pub fn token_to_string(token: &Token) -> Cow<'static, str> {
     State::new().token_to_string(token)
 }