Rename many DiagCtxt arguments.

Author: nnethercote

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -696,7 +696,7 @@ impl<'a> AstValidator<'a> {
 /// Checks that generic parameters are in the correct order,
 /// which is lifetimes, then types and then consts. (`<'a, T, const N: usize>`)
 fn validate_generic_param_order(
-    handler: &rustc_errors::DiagCtxt,
+    dcx: &rustc_errors::DiagCtxt,
     generics: &[GenericParam],
     span: Span,
 ) {
@@ -759,7 +759,7 @@ fn validate_generic_param_order(
         ordered_params += ">";
 
         for (param_ord, (max_param, spans)) in &out_of_order {
-            handler.emit_err(errors::OutOfOrderParams {
+            dcx.emit_err(errors::OutOfOrderParams {
                 spans: spans.clone(),
                 sugg_span: span,
                 param_ord,

compiler/rustc_attr/src/session_diagnostics.rs

@@ -51,9 +51,9 @@ pub(crate) struct UnknownMetaItem<'a> {
 
 // Manual implementation to be able to format `expected` items correctly.
 impl<'a> IntoDiagnostic<'a> for UnknownMetaItem<'_> {
-    fn into_diagnostic(self, handler: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
+    fn into_diagnostic(self, dcx: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
         let expected = self.expected.iter().map(|name| format!("`{name}`")).collect::<Vec<_>>();
-        let mut diag = handler.struct_span_err_with_code(
+        let mut diag = dcx.struct_span_err_with_code(
             self.span,
             fluent::attr_unknown_meta_item,
             error_code!(E0541),
@@ -201,8 +201,8 @@ pub(crate) struct UnsupportedLiteral {
 }
 
 impl<'a> IntoDiagnostic<'a> for UnsupportedLiteral {
-    fn into_diagnostic(self, handler: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
-        let mut diag = handler.struct_span_err_with_code(
+    fn into_diagnostic(self, dcx: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
+        let mut diag = dcx.struct_span_err_with_code(
             self.span,
             match self.reason {
                 UnsupportedLiteralReason::Generic => fluent::attr_unsupported_literal_generic,

compiler/rustc_borrowck/src/diagnostics/mod.rs

@@ -624,7 +624,7 @@ impl UseSpans<'_> {
     /// Add a subdiagnostic to the use of the captured variable, if it exists.
     pub(super) fn var_subdiag(
         self,
-        handler: Option<&rustc_errors::DiagCtxt>,
+        dcx: Option<&rustc_errors::DiagCtxt>,
         err: &mut Diagnostic,
         kind: Option<rustc_middle::mir::BorrowKind>,
         f: impl FnOnce(Option<CoroutineKind>, Span) -> CaptureVarCause,
@@ -646,7 +646,7 @@ impl UseSpans<'_> {
                 });
             };
             let diag = f(coroutine_kind, path_span);
-            match handler {
+            match dcx {
                 Some(hd) => err.eager_subdiagnostic(hd, diag),
                 None => err.subdiagnostic(diag),
             };

compiler/rustc_builtin_macros/src/errors.rs

@@ -448,12 +448,12 @@ pub(crate) struct EnvNotDefinedWithUserMessage {
 // Hand-written implementation to support custom user messages.
 impl<'a> IntoDiagnostic<'a> for EnvNotDefinedWithUserMessage {
     #[track_caller]
-    fn into_diagnostic(self, handler: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
+    fn into_diagnostic(self, dcx: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
         #[expect(
             rustc::untranslatable_diagnostic,
             reason = "cannot translate user-provided messages"
         )]
-        let mut diag = handler.struct_err(self.msg_from_user.to_string());
+        let mut diag = dcx.struct_err(self.msg_from_user.to_string());
         diag.set_span(self.span);
         diag
     }
@@ -802,17 +802,16 @@ pub(crate) struct AsmClobberNoReg {
 }
 
 impl<'a> IntoDiagnostic<'a> for AsmClobberNoReg {
-    fn into_diagnostic(self, handler: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
-        let mut diag =
-            handler.struct_err(crate::fluent_generated::builtin_macros_asm_clobber_no_reg);
+    fn into_diagnostic(self, dcx: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
+        let mut diag = dcx.struct_err(crate::fluent_generated::builtin_macros_asm_clobber_no_reg);
         diag.set_span(self.spans.clone());
         // eager translation as `span_labels` takes `AsRef<str>`
-        let lbl1 = handler.eagerly_translate_to_string(
+        let lbl1 = dcx.eagerly_translate_to_string(
             crate::fluent_generated::builtin_macros_asm_clobber_abi,
             [].into_iter(),
         );
         diag.span_labels(self.clobbers, &lbl1);
-        let lbl2 = handler.eagerly_translate_to_string(
+        let lbl2 = dcx.eagerly_translate_to_string(
             crate::fluent_generated::builtin_macros_asm_clobber_outputs,
             [].into_iter(),
         );

compiler/rustc_builtin_macros/src/proc_macro_harness.rs

@@ -52,15 +52,15 @@ pub fn inject(
     is_proc_macro_crate: bool,
     has_proc_macro_decls: bool,
     is_test_crate: bool,
-    handler: &rustc_errors::DiagCtxt,
+    dcx: &rustc_errors::DiagCtxt,
 ) {
     let ecfg = ExpansionConfig::default("proc_macro".to_string(), features);
     let mut cx = ExtCtxt::new(sess, ecfg, resolver, None);
 
     let mut collect = CollectProcMacros {
         macros: Vec::new(),
         in_root: true,
-        dcx: handler,
+        dcx,
         source_map: sess.source_map(),
         is_proc_macro_crate,
         is_test_crate,

compiler/rustc_builtin_macros/src/test_harness.rs

@@ -389,19 +389,19 @@ fn get_test_name(i: &ast::Item) -> Option<Symbol> {
     attr::first_attr_value_str_by_name(&i.attrs, sym::rustc_test_marker)
 }
 
-fn get_test_runner(sd: &rustc_errors::DiagCtxt, krate: &ast::Crate) -> Option<ast::Path> {
+fn get_test_runner(dcx: &rustc_errors::DiagCtxt, krate: &ast::Crate) -> Option<ast::Path> {
     let test_attr = attr::find_by_name(&krate.attrs, sym::test_runner)?;
     let meta_list = test_attr.meta_item_list()?;
     let span = test_attr.span;
     match &*meta_list {
         [single] => match single.meta_item() {
             Some(meta_item) if meta_item.is_word() => return Some(meta_item.path.clone()),
             _ => {
-                sd.emit_err(errors::TestRunnerInvalid { span });
+                dcx.emit_err(errors::TestRunnerInvalid { span });
             }
         },
         _ => {
-            sd.emit_err(errors::TestRunnerNargs { span });
+            dcx.emit_err(errors::TestRunnerNargs { span });
         }
     }
     None

compiler/rustc_codegen_cranelift/src/concurrency_limiter.rs

@@ -46,7 +46,7 @@ impl ConcurrencyLimiter {
         }
     }
 
-    pub(super) fn acquire(&mut self, handler: &rustc_errors::DiagCtxt) -> ConcurrencyLimiterToken {
+    pub(super) fn acquire(&mut self, dcx: &rustc_errors::DiagCtxt) -> ConcurrencyLimiterToken {
         let mut state = self.state.lock().unwrap();
         loop {
             state.assert_invariants();
@@ -64,7 +64,7 @@ impl ConcurrencyLimiter {
                     // Make sure to drop the mutex guard first to prevent poisoning the mutex.
                     drop(state);
                     if let Some(err) = err {
-                        handler.fatal(err);
+                        dcx.fatal(err);
                     } else {
                         // The error was already emitted, but compilation continued. Raise a silent
                         // fatal error.

compiler/rustc_codegen_gcc/src/back/lto.rs

@@ -61,7 +61,7 @@ struct LtoData {
     tmp_path: TempDir,
 }
 
-fn prepare_lto(cgcx: &CodegenContext<GccCodegenBackend>, diag_handler: &DiagCtxt) -> Result<LtoData, FatalError> {
+fn prepare_lto(cgcx: &CodegenContext<GccCodegenBackend>, dcx: &DiagCtxt) -> Result<LtoData, FatalError> {
     let export_threshold = match cgcx.lto {
         // We're just doing LTO for our one crate
         Lto::ThinLocal => SymbolExportLevel::Rust,
@@ -106,18 +106,18 @@ fn prepare_lto(cgcx: &CodegenContext<GccCodegenBackend>, diag_handler: &DiagCtxt
         // Make sure we actually can run LTO
         for crate_type in cgcx.crate_types.iter() {
             if !crate_type_allows_lto(*crate_type) {
-                diag_handler.emit_err(LtoDisallowed);
+                dcx.emit_err(LtoDisallowed);
                 return Err(FatalError);
             } else if *crate_type == CrateType::Dylib {
                 if !cgcx.opts.unstable_opts.dylib_lto {
-                    diag_handler.emit_err(LtoDylib);
+                    dcx.emit_err(LtoDylib);
                     return Err(FatalError);
                 }
             }
         }
 
         if cgcx.opts.cg.prefer_dynamic && !cgcx.opts.unstable_opts.dylib_lto {
-            diag_handler.emit_err(DynamicLinkingWithLTO);
+            dcx.emit_err(DynamicLinkingWithLTO);
             return Err(FatalError);
         }
 
@@ -154,7 +154,7 @@ fn prepare_lto(cgcx: &CodegenContext<GccCodegenBackend>, diag_handler: &DiagCtxt
                         upstream_modules.push((module, CString::new(name).unwrap()));
                     }
                     Err(e) => {
-                        diag_handler.emit_err(e);
+                        dcx.emit_err(e);
                         return Err(FatalError);
                     }
                 }
@@ -183,16 +183,16 @@ pub(crate) fn run_fat(
     modules: Vec<FatLtoInput<GccCodegenBackend>>,
     cached_modules: Vec<(SerializedModule<ModuleBuffer>, WorkProduct)>,
 ) -> Result<LtoModuleCodegen<GccCodegenBackend>, FatalError> {
-    let diag_handler = cgcx.create_dcx();
-    let lto_data = prepare_lto(cgcx, &diag_handler)?;
+    let dcx = cgcx.create_dcx();
+    let lto_data = prepare_lto(cgcx, &dcx)?;
     /*let symbols_below_threshold =
         lto_data.symbols_below_threshold.iter().map(|c| c.as_ptr()).collect::<Vec<_>>();*/
-    fat_lto(cgcx, &diag_handler, modules, cached_modules, lto_data.upstream_modules, lto_data.tmp_path,
+    fat_lto(cgcx, &dcx, modules, cached_modules, lto_data.upstream_modules, lto_data.tmp_path,
         //&symbols_below_threshold,
     )
 }
 
-fn fat_lto(cgcx: &CodegenContext<GccCodegenBackend>, _diag_handler: &DiagCtxt, modules: Vec<FatLtoInput<GccCodegenBackend>>, cached_modules: Vec<(SerializedModule<ModuleBuffer>, WorkProduct)>, mut serialized_modules: Vec<(SerializedModule<ModuleBuffer>, CString)>, tmp_path: TempDir,
+fn fat_lto(cgcx: &CodegenContext<GccCodegenBackend>, _dcx: &DiagCtxt, modules: Vec<FatLtoInput<GccCodegenBackend>>, cached_modules: Vec<(SerializedModule<ModuleBuffer>, WorkProduct)>, mut serialized_modules: Vec<(SerializedModule<ModuleBuffer>, CString)>, tmp_path: TempDir,
     //symbols_below_threshold: &[*const libc::c_char],
 ) -> Result<LtoModuleCodegen<GccCodegenBackend>, FatalError> {
     let _timer = cgcx.prof.generic_activity("GCC_fat_lto_build_monolithic_module");
@@ -257,7 +257,7 @@ fn fat_lto(cgcx: &CodegenContext<GccCodegenBackend>, _diag_handler: &DiagCtxt, m
             let (buffer, name) = serialized_modules.remove(0);
             info!("no in-memory regular modules to choose from, parsing {:?}", name);
             ModuleCodegen {
-                module_llvm: GccContext::parse(cgcx, &name, buffer.data(), diag_handler)?,
+                module_llvm: GccContext::parse(cgcx, &name, buffer.data(), dcx)?,
                 name: name.into_string().unwrap(),
                 kind: ModuleKind::Regular,
             }*/

compiler/rustc_codegen_gcc/src/back/write.rs

@@ -13,7 +13,7 @@ use rustc_target::spec::SplitDebuginfo;
 use crate::{GccCodegenBackend, GccContext};
 use crate::errors::CopyBitcode;
 
-pub(crate) unsafe fn codegen(cgcx: &CodegenContext<GccCodegenBackend>, diag_handler: &DiagCtxt, module: ModuleCodegen<GccContext>, config: &ModuleConfig) -> Result<CompiledModule, FatalError> {
+pub(crate) unsafe fn codegen(cgcx: &CodegenContext<GccCodegenBackend>, dcx: &DiagCtxt, module: ModuleCodegen<GccContext>, config: &ModuleConfig) -> Result<CompiledModule, FatalError> {
     let _timer = cgcx.prof.generic_activity_with_arg("GCC_module_codegen", &*module.name);
     {
         let context = &module.module_llvm.context;
@@ -127,12 +127,12 @@ pub(crate) unsafe fn codegen(cgcx: &CodegenContext<GccCodegenBackend>, diag_hand
             EmitObj::Bitcode => {
                 debug!("copying bitcode {:?} to obj {:?}", bc_out, obj_out);
                 if let Err(err) = link_or_copy(&bc_out, &obj_out) {
-                    diag_handler.emit_err(CopyBitcode { err });
+                    dcx.emit_err(CopyBitcode { err });
                 }
 
                 if !config.emit_bc {
                     debug!("removing_bitcode {:?}", bc_out);
-                    ensure_removed(diag_handler, &bc_out);
+                    ensure_removed(dcx, &bc_out);
                 }
             }
 
@@ -148,7 +148,7 @@ pub(crate) unsafe fn codegen(cgcx: &CodegenContext<GccCodegenBackend>, diag_hand
     ))
 }
 
-pub(crate) fn link(_cgcx: &CodegenContext<GccCodegenBackend>, _diag_handler: &DiagCtxt, mut _modules: Vec<ModuleCodegen<GccContext>>) -> Result<ModuleCodegen<GccContext>, FatalError> {
+pub(crate) fn link(_cgcx: &CodegenContext<GccCodegenBackend>, _dcx: &DiagCtxt, mut _modules: Vec<ModuleCodegen<GccContext>>) -> Result<ModuleCodegen<GccContext>, FatalError> {
     unimplemented!();
 }
 

compiler/rustc_codegen_gcc/src/errors.rs

@@ -112,8 +112,8 @@ pub(crate) struct TargetFeatureDisableOrEnable<'a> {
 pub(crate) struct MissingFeatures;
 
 impl IntoDiagnostic<'_, ErrorGuaranteed> for TargetFeatureDisableOrEnable<'_> {
-    fn into_diagnostic(self, handler: &'_ DiagCtxt) -> DiagnosticBuilder<'_, ErrorGuaranteed> {
-        let mut diag = handler.struct_err(fluent::codegen_gcc_target_feature_disable_or_enable);
+    fn into_diagnostic(self, dcx: &'_ DiagCtxt) -> DiagnosticBuilder<'_, ErrorGuaranteed> {
+        let mut diag = dcx.struct_err(fluent::codegen_gcc_target_feature_disable_or_enable);
         if let Some(span) = self.span {
             diag.set_span(span);
         };