Rollup merge of #96433 - petrochenkov:delim, r=nnethercote

rustc_ast: Harmonize delimiter naming with `proc_macro::Delimiter`

Compiler cannot reuse `proc_macro::Delimiter` directly due to extra impls, but can at least use the same naming.

After this PR the only difference between these two enums is that `proc_macro::Delimiter::None` is turned into `token::Delimiter::Invisible`.
It's my mistake that the invisible delimiter is called `None` on stable, during the stabilization I audited the naming and wrote the docs, but missed the fact that the `None` naming gives a wrong and confusing impression about what this thing is.

cc https://github.com/rust-lang/rust/pull/96421
r? ``@nnethercote``

1 files changed, 2 insertions, 2 deletions

diff --git a/compiler/rustc_session/src/utils.rs b/compiler/rustc_session/src/utils.rs
index 8064c217457..db755ccd1d5 100644
--- a/compiler/rustc_session/src/utils.rs
+++ b/compiler/rustc_session/src/utils.rs
@@ -1,6 +1,6 @@
 use crate::parse::ParseSess;
 use crate::session::Session;
-use rustc_ast::token::{self, DelimToken, Nonterminal, Token};
+use rustc_ast::token::{self, Delimiter, Nonterminal, Token};
 use rustc_ast::tokenstream::CanSynthesizeMissingTokens;
 use rustc_ast::tokenstream::{DelimSpan, TokenStream, TokenTree};
 use rustc_data_structures::profiling::VerboseTimingGuard;
@@ -137,7 +137,7 @@ impl<'a> FlattenNonterminals<'a> {
                 let tts = (self.nt_to_tokenstream)(&nt, self.parse_sess, self.synthesize_tokens);
                 TokenTree::Delimited(
                     DelimSpan::from_single(token.span),
-                    DelimToken::NoDelim,
+                    Delimiter::Invisible,
                     self.process_token_stream(tts),
                 )
                 .into()