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Auto merge of rust-lang#125174 - nnethercote:less-ast-pretty-printing, r=<try>
Print `token::Interpolated` with token stream pretty printing. r? `@ghost`
2 parents b71e8cb + f7ce1ac commit 53af78d

12 files changed

+126
-236
lines changed

compiler/rustc_ast_pretty/src/pprust/state.rs

+13-17
Original file line numberDiff line numberDiff line change
@@ -524,7 +524,10 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
524524
}
525525
}
526526

527-
fn peek_comment<'b>(&'b self) -> Option<&'b Comment> where 'a: 'b {
527+
fn peek_comment<'b>(&'b self) -> Option<&'b Comment>
528+
where
529+
'a: 'b,
530+
{
528531
self.comments().and_then(|c| c.peek())
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}
530533

@@ -849,18 +852,11 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
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}
850853

851854
fn nonterminal_to_string(&self, nt: &Nonterminal) -> String {
852-
match nt {
853-
token::NtExpr(e) => self.expr_to_string(e),
854-
token::NtMeta(e) => self.attr_item_to_string(e),
855-
token::NtTy(e) => self.ty_to_string(e),
856-
token::NtPath(e) => self.path_to_string(e),
857-
token::NtItem(e) => self.item_to_string(e),
858-
token::NtBlock(e) => self.block_to_string(e),
859-
token::NtStmt(e) => self.stmt_to_string(e),
860-
token::NtPat(e) => self.pat_to_string(e),
861-
token::NtLiteral(e) => self.expr_to_string(e),
862-
token::NtVis(e) => self.vis_to_string(e),
863-
}
855+
// We convert the AST fragment to a token stream and pretty print that,
856+
// rather than using AST pretty printing, because `Nonterminal` is
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// slated for removal in #124141. (This method will also then be
858+
// removed.)
859+
self.tts_to_string(&TokenStream::from_nonterminal_ast(nt))
864860
}
865861

866862
/// Print the token kind precisely, without converting `$crate` into its respective crate name.
@@ -994,6 +990,10 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
994990
Self::to_string(|s| s.print_attr_item(ai, ai.path.span))
995991
}
996992

993+
fn tts_to_string(&self, tokens: &TokenStream) -> String {
994+
Self::to_string(|s| s.print_tts(tokens, false))
995+
}
996+
997997
fn to_string(f: impl FnOnce(&mut State<'_>)) -> String {
998998
let mut printer = State::new();
999999
f(&mut printer);
@@ -2039,10 +2039,6 @@ impl<'a> State<'a> {
20392039
})
20402040
}
20412041

2042-
pub(crate) fn tts_to_string(&self, tokens: &TokenStream) -> String {
2043-
Self::to_string(|s| s.print_tts(tokens, false))
2044-
}
2045-
20462042
pub(crate) fn path_segment_to_string(&self, p: &ast::PathSegment) -> String {
20472043
Self::to_string(|s| s.print_path_segment(p, false))
20482044
}

compiler/rustc_expand/src/mbe/transcribe.rs

+4
Original file line numberDiff line numberDiff line change
@@ -318,6 +318,10 @@ pub(super) fn transcribe<'a>(
318318
mbe::TokenTree::Token(token) => {
319319
let mut token = token.clone();
320320
mut_visit::visit_token(&mut token, &mut marker);
321+
// njn: need spacing in mbe::TokenTree::Token
322+
// njn: try changing other Alone/token_alone occurrences, see
323+
// if any tests are affected
324+
// - why do braces on `use` lines have a space after them? e.g. in stringify.rs
321325
let tt = TokenTree::Token(token, Spacing::Alone);
322326
result.push(tt);
323327
}

compiler/rustc_parse/src/parser/mod.rs

+1
Original file line numberDiff line numberDiff line change
@@ -276,6 +276,7 @@ impl TokenCursor {
276276
token.kind,
277277
token::OpenDelim(_) | token::CloseDelim(_)
278278
));
279+
//eprintln!("t = {token:?}, sp = {spacing:?}");
279280
return (token.clone(), spacing);
280281
}
281282
&TokenTree::Delimited(sp, spacing, delim, ref tts) => {

tests/ui/macros/issue-98790.rs

+3-1
Original file line numberDiff line numberDiff line change
@@ -19,6 +19,8 @@ macro_rules! repro {
1919
fn main() {
2020
assert_eq!(
2121
repro!(match () { () => true } | true),
22-
"pub fn repro() -> bool { (match () { () => true, }) | true }"
22+
// njn: dtolnay must take care of this
23+
//"pub fn repro() -> bool { (match () { () => true, }) | true }"
24+
"pub fn repro() -> bool { match () { () => true } | true }"
2325
);
2426
}

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