Rename DiagCtxt::with_emitter as DiagCtxt::new.

Because it's now the only constructor.

compiler/rustc_codegen_ssa/src/back/write.rs

@@ -373,7 +373,7 @@ pub struct CodegenContext<B: WriteBackendMethods> {
 
 impl<B: WriteBackendMethods> CodegenContext<B> {
     pub fn create_dcx(&self) -> DiagCtxt {
-        DiagCtxt::with_emitter(Box::new(self.diag_emitter.clone()))
+        DiagCtxt::new(Box::new(self.diag_emitter.clone()))
     }
 
     pub fn config(&self, kind: ModuleKind) -> &ModuleConfig {

compiler/rustc_driver_impl/src/lib.rs

@@ -1388,7 +1388,7 @@ fn report_ice(
         rustc_errors::ColorConfig::Auto,
         fallback_bundle,
     ));
-    let dcx = rustc_errors::DiagCtxt::with_emitter(emitter);
+    let dcx = rustc_errors::DiagCtxt::new(emitter);
 
     // a .span_bug or .bug call has already printed what
     // it wants to print.

compiler/rustc_errors/src/json/tests.rs

@@ -61,7 +61,7 @@ fn test_positions(code: &str, span: (u32, u32), expected_output: SpanTestData) {
         );
 
         let span = Span::with_root_ctxt(BytePos(span.0), BytePos(span.1));
-        let dcx = DiagCtxt::with_emitter(Box::new(je));
+        let dcx = DiagCtxt::new(Box::new(je));
         dcx.span_err(span, "foo");
 
         let bytes = output.lock().unwrap();

compiler/rustc_errors/src/lib.rs

@@ -601,7 +601,7 @@ impl DiagCtxt {
         self
     }
 
-    pub fn with_emitter(emitter: Box<DynEmitter>) -> Self {
+    pub fn new(emitter: Box<DynEmitter>) -> Self {
         Self {
             inner: Lock::new(DiagCtxtInner {
                 flags: DiagCtxtFlags { can_emit_warnings: true, ..Default::default() },

compiler/rustc_expand/src/tests.rs

@@ -33,7 +33,7 @@ fn create_test_handler() -> (DiagCtxt, Lrc<SourceMap>, Arc<Mutex<Vec<u8>>>) {
     let emitter = HumanEmitter::new(Box::new(Shared { data: output.clone() }), fallback_bundle)
         .sm(Some(source_map.clone()))
         .diagnostic_width(Some(140));
-    let dcx = DiagCtxt::with_emitter(Box::new(emitter));
+    let dcx = DiagCtxt::new(Box::new(emitter));
     (dcx, source_map, output)
 }
 

compiler/rustc_session/src/parse.rs

@@ -239,7 +239,7 @@ impl ParseSess {
         let sm = Lrc::new(SourceMap::new(file_path_mapping));
         let emitter =
             Box::new(HumanEmitter::stderr(ColorConfig::Auto, fallback_bundle).sm(Some(sm.clone())));
-        let dcx = DiagCtxt::with_emitter(emitter);
+        let dcx = DiagCtxt::new(emitter);
         ParseSess::with_dcx(dcx, sm)
     }
 
@@ -269,9 +269,9 @@ impl ParseSess {
         let fallback_bundle = fallback_fluent_bundle(Vec::new(), false);
         let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
         let emitter = Box::new(HumanEmitter::stderr(ColorConfig::Auto, fallback_bundle));
-        let fatal_dcx = DiagCtxt::with_emitter(emitter);
+        let fatal_dcx = DiagCtxt::new(emitter);
-        let dcx = DiagCtxt::with_emitter(Box::new(SilentEmitter { fatal_dcx, fatal_note }))
+        let dcx =
-            .disable_warnings();
+            DiagCtxt::new(Box::new(SilentEmitter { fatal_dcx, fatal_note })).disable_warnings();
         ParseSess::with_dcx(dcx, sm)
     }
 

compiler/rustc_session/src/session.rs

@@ -1080,8 +1080,8 @@ pub fn build_session(
     );
     let emitter = default_emitter(&sopts, registry, source_map.clone(), bundle, fallback_bundle);
 
-    let mut dcx = DiagCtxt::with_emitter(emitter)
+    let mut dcx =
-        .with_flags(sopts.unstable_opts.dcx_flags(can_emit_warnings));
+        DiagCtxt::new(emitter).with_flags(sopts.unstable_opts.dcx_flags(can_emit_warnings));
     if let Some(ice_file) = ice_file {
         dcx = dcx.with_ice_file(ice_file);
     }
@@ -1402,7 +1402,7 @@ pub struct EarlyDiagCtxt {
 impl EarlyDiagCtxt {
     pub fn new(output: ErrorOutputType) -> Self {
         let emitter = mk_emitter(output);
-        Self { dcx: DiagCtxt::with_emitter(emitter) }
+        Self { dcx: DiagCtxt::new(emitter) }
     }
 
     /// Swap out the underlying dcx once we acquire the user's preference on error emission
@@ -1412,7 +1412,7 @@ impl EarlyDiagCtxt {
         self.dcx.abort_if_errors();
 
         let emitter = mk_emitter(output);
-        self.dcx = DiagCtxt::with_emitter(emitter);
+        self.dcx = DiagCtxt::new(emitter);
     }
 
     #[allow(rustc::untranslatable_diagnostic)]

src/librustdoc/core.rs

@@ -172,7 +172,7 @@ pub(crate) fn new_dcx(
         }
     };
 
-    rustc_errors::DiagCtxt::with_emitter(emitter).with_flags(unstable_opts.dcx_flags(true))
+    rustc_errors::DiagCtxt::new(emitter).with_flags(unstable_opts.dcx_flags(true))
 }
 
 /// Parse, resolve, and typecheck the given crate.

src/librustdoc/doctest.rs

@@ -582,7 +582,7 @@ pub(crate) fn make_test(
             let emitter = HumanEmitter::new(Box::new(io::sink()), fallback_bundle);
 
             // FIXME(misdreavus): pass `-Z treat-err-as-bug` to the doctest parser
-            let dcx = DiagCtxt::with_emitter(Box::new(emitter)).disable_warnings();
+            let dcx = DiagCtxt::new(Box::new(emitter)).disable_warnings();
             let sess = ParseSess::with_dcx(dcx, sm);
 
             let mut found_main = false;
@@ -767,7 +767,7 @@ fn check_if_attr_is_complete(source: &str, edition: Edition) -> bool {
 
             let emitter = HumanEmitter::new(Box::new(io::sink()), fallback_bundle);
 
-            let dcx = DiagCtxt::with_emitter(Box::new(emitter)).disable_warnings();
+            let dcx = DiagCtxt::new(Box::new(emitter)).disable_warnings();
             let sess = ParseSess::with_dcx(dcx, sm);
             let mut parser =
                 match maybe_new_parser_from_source_str(&sess, filename, source.to_owned()) {

src/librustdoc/passes/lint/check_code_block_syntax.rs

@@ -42,7 +42,7 @@ fn check_rust_syntax(
     let emitter = BufferEmitter { buffer: Lrc::clone(&buffer), fallback_bundle };
 
     let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
-    let dcx = DiagCtxt::with_emitter(Box::new(emitter)).disable_warnings();
+    let dcx = DiagCtxt::new(Box::new(emitter)).disable_warnings();
     let source = dox[code_block.code].to_owned();
     let sess = ParseSess::with_dcx(dcx, sm);
 

src/tools/clippy/clippy_lints/src/doc/needless_doctest_main.rs

@@ -45,7 +45,7 @@ pub fn check(
                 let fallback_bundle =
                     rustc_errors::fallback_fluent_bundle(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(), false);
                 let emitter = HumanEmitter::new(Box::new(io::sink()), fallback_bundle);
-                let dcx = DiagCtxt::with_emitter(Box::new(emitter)).disable_warnings();
+                let dcx = DiagCtxt::new(Box::new(emitter)).disable_warnings();
                 #[expect(clippy::arc_with_non_send_sync)] // `Lrc` is expected by with_dcx
                 let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
                 let sess = ParseSess::with_dcx(dcx, sm);

src/tools/rustfmt/src/parse/session.rs

@@ -154,7 +154,7 @@ fn default_dcx(
         );
         Box::new(HumanEmitter::stderr(emit_color, fallback_bundle).sm(Some(source_map.clone())))
     };
-    DiagCtxt::with_emitter(Box::new(SilentOnIgnoredFilesEmitter {
+    DiagCtxt::new(Box::new(SilentOnIgnoredFilesEmitter {
         has_non_ignorable_parser_errors: false,
         source_map,
         emitter,
@@ -235,7 +235,7 @@ impl ParseSess {
     }
 
     pub(crate) fn set_silent_emitter(&mut self) {
-        self.parse_sess.dcx = DiagCtxt::with_emitter(silent_emitter());
+        self.parse_sess.dcx = DiagCtxt::new(silent_emitter());
     }
 
     pub(crate) fn span_to_filename(&self, span: Span) -> FileName {