Auto merge of #86982 - GuillaumeGomez:rollup-7sbye3c, r=GuillaumeGomez

Rollup of 8 pull requests

Successful merges:

 - #84961 (Rework SESSION_GLOBALS API)
 - #86726 (Use diagnostic items instead of lang items for rfc2229 migrations)
 - #86789 (Update BTreeSet::drain_filter documentation)
 - #86838 (Checking that function is const if marked with rustc_const_unstable)
 - #86903 (Fix small headers display)
 - #86913 (Document rustdoc with `--document-private-items`)
 - #86957 (Update .mailmap file)
 - #86971 (mailmap: Add alternative addresses for myself)

Failed merges:

 - #86869 (Account for capture kind in auto traits migration)

r? `@ghost`
`@rustbot` modify labels: rollup

.mailmap

@@ -113,10 +113,14 @@ Hanna Kruppe <hanna.kruppe@gmail.com> <robin.kruppe@gmail.com>
 Heather <heather@cynede.net> <Cynede@Gentoo.org>
 Heather <heather@cynede.net> <Heather@cynede.net>
 Herman J. Radtke III <herman@hermanradtke.com> Herman J. Radtke III <hermanradtke@gmail.com>
+Ian Jackson <ijackson@chiark.greenend.org.uk> <ian.jackson@citrix.com>
+Ian Jackson <ijackson@chiark.greenend.org.uk> <ijackson+github@slimy.greenend.org.uk>
+Ian Jackson <ijackson@chiark.greenend.org.uk> <iwj@xenproject.org>
 Ilyong Cho <ilyoan@gmail.com>
 inquisitivecrystal <22333129+inquisitivecrystal@users.noreply.github.com>
 Ivan Ivaschenko <defuz.net@gmail.com>
 J. J. Weber <jjweber@gmail.com>
+Jacob Pratt <jacob@jhpratt.dev> <the.z.cuber@gmail.com>
 Jakub Adam Wieczorek <jakub.adam.wieczorek@gmail.com> <jakub.bukaj@yahoo.com>
 Jakub Adam Wieczorek <jakub.adam.wieczorek@gmail.com> <jakub@jakub.cc>
 Jakub Adam Wieczorek <jakub.adam.wieczorek@gmail.com> <jakubw@jakubw.net>

compiler/rustc_ast/src/util/comments/tests.rs

@@ -1,9 +1,9 @@
 use super::*;
-use rustc_span::with_default_session_globals;
+use rustc_span::create_default_session_globals_then;
 
 #[test]
 fn test_block_doc_comment_1() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let comment = "\n * Test \n **  Test\n *   Test\n";
         let stripped = beautify_doc_string(Symbol::intern(comment));
         assert_eq!(stripped.as_str(), " Test \n*  Test\n   Test");
@@ -12,7 +12,7 @@ fn test_block_doc_comment_1() {
 
 #[test]
 fn test_block_doc_comment_2() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let comment = "\n * Test\n *  Test\n";
         let stripped = beautify_doc_string(Symbol::intern(comment));
         assert_eq!(stripped.as_str(), " Test\n  Test");
@@ -21,7 +21,7 @@ fn test_block_doc_comment_2() {
 
 #[test]
 fn test_block_doc_comment_3() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let comment = "\n let a: *i32;\n *a = 5;\n";
         let stripped = beautify_doc_string(Symbol::intern(comment));
         assert_eq!(stripped.as_str(), " let a: *i32;\n *a = 5;");
@@ -30,7 +30,7 @@ fn test_block_doc_comment_3() {
 
 #[test]
 fn test_line_doc_comment() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let stripped = beautify_doc_string(Symbol::intern(" test"));
         assert_eq!(stripped.as_str(), " test");
         let stripped = beautify_doc_string(Symbol::intern("! test"));

compiler/rustc_ast_pretty/src/pprust/tests.rs

@@ -1,8 +1,8 @@
 use super::*;
 
 use rustc_ast as ast;
+use rustc_span::create_default_session_globals_then;
 use rustc_span::symbol::Ident;
-use rustc_span::with_default_session_globals;
 
 fn fun_to_string(
     decl: &ast::FnDecl,
@@ -24,7 +24,7 @@ fn variant_to_string(var: &ast::Variant) -> String {
 
 #[test]
 fn test_fun_to_string() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let abba_ident = Ident::from_str("abba");
 
         let decl =
@@ -39,7 +39,7 @@ fn test_fun_to_string() {
 
 #[test]
 fn test_variant_to_string() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let ident = Ident::from_str("principal_skinner");
 
         let var = ast::Variant {

compiler/rustc_error_codes/src/error_codes/E0542.md

@@ -10,7 +10,7 @@ Erroneous code example:
 fn _stable_fn() {}
 
 #[rustc_const_stable(feature = "_stable_const_fn")] // invalid
-fn _stable_const_fn() {}
+const fn _stable_const_fn() {}
 
 #[stable(feature = "_deprecated_fn", since = "0.1.0")]
 #[rustc_deprecated(
@@ -29,7 +29,7 @@ To fix this issue, you need to provide the `since` field. Example:
 fn _stable_fn() {}
 
 #[rustc_const_stable(feature = "_stable_const_fn", since = "1.0.0")] // ok!
-fn _stable_const_fn() {}
+const fn _stable_const_fn() {}
 
 #[stable(feature = "_deprecated_fn", since = "0.1.0")]
 #[rustc_deprecated(

compiler/rustc_error_codes/src/error_codes/E0545.md

@@ -10,7 +10,7 @@ Erroneous code example:
 fn _unstable_fn() {}
 
 #[rustc_const_unstable(feature = "_unstable_const_fn", issue = "0")] // invalid
-fn _unstable_const_fn() {}
+const fn _unstable_const_fn() {}
 ```
 
 To fix this issue, you need to provide a correct value in the `issue` field.
@@ -24,7 +24,7 @@ Example:
 fn _unstable_fn() {}
 
 #[rustc_const_unstable(feature = "_unstable_const_fn", issue = "1")] // ok!
-fn _unstable_const_fn() {}
+const fn _unstable_const_fn() {}
 ```
 
 See the [How Rust is Made and “Nightly Rust”][how-rust-made-nightly] appendix

compiler/rustc_error_codes/src/error_codes/E0547.md

@@ -10,7 +10,7 @@ Erroneous code example:
 fn _unstable_fn() {}
 
 #[rustc_const_unstable(feature = "_unstable_const_fn")] // invalid
-fn _unstable_const_fn() {}
+const fn _unstable_const_fn() {}
 ```
 
 To fix this issue, you need to provide the `issue` field. Example:
@@ -26,7 +26,7 @@ fn _unstable_fn() {}
     feature = "_unstable_const_fn",
     issue = "none"
 )] // ok!
-fn _unstable_const_fn() {}
+const fn _unstable_const_fn() {}
 ```
 
 See the [How Rust is Made and “Nightly Rust”][how-rust-made-nightly] appendix

compiler/rustc_errors/src/json/tests.rs

@@ -39,16 +39,11 @@ impl<T: Write> Write for Shared<T> {
     }
 }
 
-fn with_default_session_globals(f: impl FnOnce()) {
-    let session_globals = rustc_span::SessionGlobals::new(rustc_span::edition::DEFAULT_EDITION);
-    rustc_span::SESSION_GLOBALS.set(&session_globals, f);
-}
-
 /// Test the span yields correct positions in JSON.
 fn test_positions(code: &str, span: (u32, u32), expected_output: SpanTestData) {
     let expected_output = TestData { spans: vec![expected_output] };
 
-    with_default_session_globals(|| {
+    rustc_span::create_default_session_globals_then(|| {
         let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
         sm.new_source_file(Path::new("test.rs").to_owned().into(), code.to_owned());
 

compiler/rustc_expand/src/mut_visit/tests.rs

@@ -3,8 +3,8 @@ use crate::tests::{matches_codepattern, string_to_crate};
 use rustc_ast as ast;
 use rustc_ast::mut_visit::MutVisitor;
 use rustc_ast_pretty::pprust;
+use rustc_span::create_default_session_globals_then;
 use rustc_span::symbol::Ident;
-use rustc_span::with_default_session_globals;
 
 // This version doesn't care about getting comments or doc-strings in.
 fn print_crate_items(krate: &ast::Crate) -> String {
@@ -38,7 +38,7 @@ macro_rules! assert_pred {
 // Make sure idents get transformed everywhere.
 #[test]
 fn ident_transformation() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let mut zz_visitor = ToZzIdentMutVisitor;
         let mut krate =
             string_to_crate("#[a] mod b {fn c (d : e, f : g) {h!(i,j,k);l;m}}".to_string());
@@ -55,7 +55,7 @@ fn ident_transformation() {
 // Make sure idents get transformed even inside macro defs.
 #[test]
 fn ident_transformation_in_defs() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let mut zz_visitor = ToZzIdentMutVisitor;
         let mut krate = string_to_crate(
             "macro_rules! a {(b $c:expr $(d $e:token)f+ => \

compiler/rustc_expand/src/parse/tests.rs

@@ -10,9 +10,9 @@ use rustc_errors::PResult;
 use rustc_parse::new_parser_from_source_str;
 use rustc_parse::parser::ForceCollect;
 use rustc_session::parse::ParseSess;
+use rustc_span::create_default_session_globals_then;
 use rustc_span::source_map::FilePathMapping;
 use rustc_span::symbol::{kw, sym, Symbol};
-use rustc_span::with_default_session_globals;
 use rustc_span::{BytePos, FileName, Pos, Span};
 
 use std::path::PathBuf;
@@ -51,15 +51,15 @@ fn string_to_item(source_str: String) -> Option<P<ast::Item>> {
 #[should_panic]
 #[test]
 fn bad_path_expr_1() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         string_to_expr("::abc::def::return".to_string());
     })
 }
 
 // Checks the token-tree-ization of macros.
 #[test]
 fn string_to_tts_macro() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let tts: Vec<_> =
             string_to_stream("macro_rules! zip (($a)=>($a))".to_string()).trees().collect();
         let tts: &[TokenTree] = &tts[..];
@@ -96,7 +96,7 @@ fn string_to_tts_macro() {
 
 #[test]
 fn string_to_tts_1() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let tts = string_to_stream("fn a (b : i32) { b; }".to_string());
 
         let expected = TokenStream::new(vec![
@@ -131,7 +131,7 @@ fn string_to_tts_1() {
 
 #[test]
 fn parse_use() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let use_s = "use foo::bar::baz;";
         let vitem = string_to_item(use_s.to_string()).unwrap();
         let vitem_s = item_to_string(&vitem);
@@ -146,7 +146,7 @@ fn parse_use() {
 
 #[test]
 fn parse_extern_crate() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let ex_s = "extern crate foo;";
         let vitem = string_to_item(ex_s.to_string()).unwrap();
         let vitem_s = item_to_string(&vitem);
@@ -184,7 +184,7 @@ fn get_spans_of_pat_idents(src: &str) -> Vec<Span> {
 
 #[test]
 fn span_of_self_arg_pat_idents_are_correct() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let srcs = [
             "impl z { fn a (&self, &myarg: i32) {} }",
             "impl z { fn a (&mut self, &myarg: i32) {} }",
@@ -208,7 +208,7 @@ fn span_of_self_arg_pat_idents_are_correct() {
 
 #[test]
 fn parse_exprs() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         // just make sure that they parse....
         string_to_expr("3 + 4".to_string());
         string_to_expr("a::z.froob(b,&(987+3))".to_string());
@@ -217,7 +217,7 @@ fn parse_exprs() {
 
 #[test]
 fn attrs_fix_bug() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         string_to_item(
             "pub fn mk_file_writer(path: &Path, flags: &[FileFlag])
                 -> Result<Box<Writer>, String> {
@@ -238,7 +238,7 @@ let mut fflags: c_int = wb();
 
 #[test]
 fn crlf_doc_comments() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let sess = sess();
 
         let name_1 = FileName::Custom("crlf_source_1".to_string());
@@ -272,7 +272,7 @@ fn ttdelim_span() {
         new_parser_from_source_str(sess, name, source).parse_expr()
     }
 
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let sess = sess();
         let expr = parse_expr_from_source_str(
             PathBuf::from("foo").into(),
@@ -300,7 +300,7 @@ fn ttdelim_span() {
 // See `recurse_into_file_modules` in the parser.
 #[test]
 fn out_of_line_mod() {
-    with_default_session_globals(|| {
+    create_default_session_globals_then(|| {
         let item = parse_item_from_source_str(
             PathBuf::from("foo").into(),
             "mod foo { struct S; mod this_does_not_exist; }".to_owned(),

compiler/rustc_expand/src/tests.rs

@@ -2,8 +2,8 @@ use rustc_ast as ast;
 use rustc_ast::tokenstream::TokenStream;
 use rustc_parse::{new_parser_from_source_str, parser::Parser, source_file_to_stream};
 use rustc_session::parse::ParseSess;
+use rustc_span::create_default_session_if_not_set_then;
 use rustc_span::source_map::{FilePathMapping, SourceMap};
-use rustc_span::with_default_session_globals;
 use rustc_span::{BytePos, MultiSpan, Span};
 
 use rustc_data_structures::sync::Lrc;
@@ -124,7 +124,7 @@ impl<T: Write> Write for Shared<T> {
 }
 
 fn test_harness(file_text: &str, span_labels: Vec<SpanLabel>, expected_output: &str) {
-    with_default_session_globals(|| {
+    create_default_session_if_not_set_then(|_| {
         let output = Arc::new(Mutex::new(Vec::new()));
 
         let source_map = Lrc::new(SourceMap::new(FilePathMapping::empty()));