session: diagnostic migration lint on more fns

Apply the diagnostic migration lint to more functions on `Session`.

Signed-off-by: David Wood <david.wood@huawei.com>

Author: davidtwco

compiler/rustc_driver/src/lib.rs

@@ -1205,6 +1205,9 @@ static DEFAULT_HOOK: LazyLock<Box<dyn Fn(&panic::PanicInfo<'_>) + Sync + Send +
 ///
 /// When `install_ice_hook` is called, this function will be called as the panic
 /// hook.
+// FIXME(translation): need struct diagnostics implemented on `Handler`
+#[allow(rustc::untranslatable_diagnostic)]
+#[allow(rustc::diagnostic_outside_of_impl)]
 pub fn report_ice(info: &panic::PanicInfo<'_>, bug_report_url: &str) {
     let fallback_bundle =
         rustc_errors::fallback_fluent_bundle(rustc_errors::DEFAULT_LOCALE_RESOURCES, false);

compiler/rustc_error_messages/locales/en-US/interface.ftl

@@ -41,3 +41,13 @@ interface_rustc_error_unexpected_annotation =
 
 interface_failed_writing_file =
     failed to write file {$path}: {$error}"
+
+interface_unsupported_crate_type_for_target =
+    dropping unsupported crate type `{$crate_type}` for target `{$target_triple}`
+
+interface_multiple_output_types_adaption =
+    due to multiple output types requested, the explicitly specified output file name will be adapted for each output type
+
+interface_ignoring_extra_filename = ignoring -C extra-filename flag due to -o flag
+
+interface_ignoring_out_dir = ignoring --out-dir flag due to -o flag

compiler/rustc_error_messages/locales/en-US/monomorphize.ftl

@@ -24,3 +24,9 @@ monomorphize_large_assignments =
 
 monomorphize_requires_lang_item =
     requires `{$lang_item}` lang_item
+
+monomorphize_encountered_error_while_instantiating =
+    the above error was encountered while instantiating `{$formatted_item}`
+
+monomorphize_unknown_cgu_collection_mode =
+    unknown codegen-item collection mode '{$mode}', falling back to 'lazy' mode

compiler/rustc_error_messages/locales/en-US/session.ftl

@@ -66,3 +66,5 @@ session_crate_name_invalid = crate names cannot start with a `-`, but `{$s}` has
 session_crate_name_empty = crate name must not be empty
 
 session_invalid_character_in_create_name = invalid character `{$character}` in crate name: `{$crate_name}`
+
+session_optimization_fuel_exhausted = optimization-fuel-exhausted: {$msg}

compiler/rustc_errors/src/lib.rs

@@ -941,6 +941,7 @@ impl Handler {
         self.emit_diag_at_span(Diagnostic::new(Bug, msg), span);
     }
 
+    #[rustc_lint_diagnostics]
     pub fn span_note_without_error(
         &self,
         span: impl Into<MultiSpan>,
@@ -949,6 +950,7 @@ impl Handler {
         self.emit_diag_at_span(Diagnostic::new(Note, msg), span);
     }
 
+    #[rustc_lint_diagnostics]
     pub fn span_note_diag(
         &self,
         span: Span,
@@ -960,19 +962,23 @@ impl Handler {
     }
 
     // NOTE: intentionally doesn't raise an error so rustc_codegen_ssa only reports fatal errors in the main thread
+    #[rustc_lint_diagnostics]
     pub fn fatal(&self, msg: impl Into<DiagnosticMessage>) -> FatalError {
         self.inner.borrow_mut().fatal(msg)
     }
 
+    #[rustc_lint_diagnostics]
     pub fn err(&self, msg: impl Into<DiagnosticMessage>) -> ErrorGuaranteed {
         self.inner.borrow_mut().err(msg)
     }
 
+    #[rustc_lint_diagnostics]
     pub fn warn(&self, msg: impl Into<DiagnosticMessage>) {
         let mut db = DiagnosticBuilder::new(self, Warning(None), msg);
         db.emit();
     }
 
+    #[rustc_lint_diagnostics]
     pub fn note_without_error(&self, msg: impl Into<DiagnosticMessage>) {
         DiagnosticBuilder::new(self, Note, msg).emit();
     }

compiler/rustc_interface/Cargo.toml

@@ -45,6 +45,7 @@ rustc_plugin_impl = { path = "../rustc_plugin_impl" }
 rustc_privacy = { path = "../rustc_privacy" }
 rustc_query_impl = { path = "../rustc_query_impl" }
 rustc_resolve = { path = "../rustc_resolve" }
+rustc_target = { path = "../rustc_target" }
 rustc_trait_selection = { path = "../rustc_trait_selection" }
 rustc_ty_utils = { path = "../rustc_ty_utils" }
 
@@ -54,9 +55,6 @@ libc = "0.2"
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3", features = ["libloaderapi"] }
 
-[dev-dependencies]
-rustc_target = { path = "../rustc_target" }
-
 [features]
 llvm = ['rustc_codegen_llvm']
 rustc_use_parallel_compiler = ['rayon', 'rustc-rayon-core', 'rustc_query_impl/rustc_use_parallel_compiler']

compiler/rustc_interface/src/errors.rs

@@ -1,5 +1,7 @@
 use rustc_macros::Diagnostic;
+use rustc_session::config::CrateType;
 use rustc_span::{Span, Symbol};
+use rustc_target::spec::TargetTriple;
 
 use std::io;
 use std::path::Path;
@@ -87,3 +89,22 @@ pub struct FailedWritingFile<'a> {
     pub path: &'a Path,
     pub error: io::Error,
 }
+
+#[derive(Diagnostic)]
+#[diag(interface::unsupported_crate_type_for_target)]
+pub struct UnsupportedCrateTypeForTarget<'a> {
+    pub crate_type: CrateType,
+    pub target_triple: &'a TargetTriple,
+}
+
+#[derive(Diagnostic)]
+#[diag(interface::multiple_output_types_adaption)]
+pub struct MultipleOutputTypesAdaption;
+
+#[derive(Diagnostic)]
+#[diag(interface::ignoring_extra_filename)]
+pub struct IgnoringExtraFilename;
+
+#[derive(Diagnostic)]
+#[diag(interface::ignoring_out_dir)]
+pub struct IgnoringOutDir;

compiler/rustc_interface/src/util.rs

@@ -1,3 +1,4 @@
+use crate::errors;
 use info;
 use libloading::Library;
 use rustc_ast as ast;
@@ -572,16 +573,15 @@ pub fn collect_crate_types(session: &Session, attrs: &[ast::Attribute]) -> Vec<C
     }
 
     base.retain(|crate_type| {
-        let res = !output::invalid_output_for_target(session, *crate_type);
-
-        if !res {
-            session.warn(&format!(
-                "dropping unsupported crate type `{}` for target `{}`",
-                *crate_type, session.opts.target_triple
-            ));
+        if output::invalid_output_for_target(session, *crate_type) {
+            session.emit_warning(errors::UnsupportedCrateTypeForTarget {
+                crate_type: *crate_type,
+                target_triple: &session.opts.target_triple,
+            });
+            false
+        } else {
+            true
         }
-
-        res
     });
 
     base
@@ -624,19 +624,16 @@ pub fn build_output_filenames(
             let unnamed_output_types =
                 sess.opts.output_types.values().filter(|a| a.is_none()).count();
             let ofile = if unnamed_output_types > 1 {
-                sess.warn(
-                    "due to multiple output types requested, the explicitly specified \
-                     output file name will be adapted for each output type",
-                );
+                sess.emit_warning(errors::MultipleOutputTypesAdaption);
                 None
             } else {
                 if !sess.opts.cg.extra_filename.is_empty() {
-                    sess.warn("ignoring -C extra-filename flag due to -o flag");
+                    sess.emit_warning(errors::IgnoringExtraFilename);
                 }
                 Some(out_file.clone())
             };
             if *odir != None {
-                sess.warn("ignoring --out-dir flag due to -o flag");
+                sess.emit_warning(errors::IgnoringOutDir);
             }
 
             OutputFilenames::new(

compiler/rustc_monomorphize/src/collector.rs

@@ -201,7 +201,10 @@ use std::iter;
 use std::ops::Range;
 use std::path::PathBuf;
 
-use crate::errors::{LargeAssignmentsLint, RecursionLimit, RequiresLangItem, TypeLengthLimit};
+use crate::errors::{
+    EncounteredErrorWhileInstantiating, LargeAssignmentsLint, RecursionLimit, RequiresLangItem,
+    TypeLengthLimit,
+};
 
 #[derive(PartialEq)]
 pub enum MonoItemCollectionMode {
@@ -524,10 +527,10 @@ fn collect_items_rec<'tcx>(
         && starting_point.node.is_user_defined()
     {
         let formatted_item = with_no_trimmed_paths!(starting_point.node.to_string());
-        tcx.sess.span_note_without_error(
-            starting_point.span,
-            &format!("the above error was encountered while instantiating `{}`", formatted_item),
-        );
+        tcx.sess.emit_note(EncounteredErrorWhileInstantiating {
+            span: starting_point.span,
+            formatted_item,
+        });
     }
     inlining_map.lock_mut().record_accesses(starting_point.node, &neighbors.items);
 

compiler/rustc_monomorphize/src/errors.rs

@@ -83,3 +83,17 @@ pub struct SymbolAlreadyDefined {
     pub span: Option<Span>,
     pub symbol: String,
 }
+
+#[derive(Diagnostic)]
+#[diag(monomorphize::encountered_error_while_instantiating)]
+pub struct EncounteredErrorWhileInstantiating {
+    #[primary_span]
+    pub span: Span,
+    pub formatted_item: String,
+}
+
+#[derive(Diagnostic)]
+#[diag(monomorphize::unknown_cgu_collection_mode)]
+pub struct UnknownCguCollectionMode<'a> {
+    pub mode: &'a str,
+}