Inline and remove HumanEmitter::stderr.

Because `HumanEmitter::new` is enough, in conjunction with the (renamed)
`stderr_destination` function.

Author: nnethercote

compiler/rustc_driver_impl/src/lib.rs

@@ -21,6 +21,7 @@ use rustc_codegen_ssa::{traits::CodegenBackend, CodegenErrors, CodegenResults};
 use rustc_data_structures::profiling::{
     get_resident_set_size, print_time_passes_entry, TimePassesFormat,
 };
+use rustc_errors::emitter::stderr_destination;
 use rustc_errors::registry::Registry;
 use rustc_errors::{
     markdown, ColorConfig, DiagCtxt, ErrCode, ErrorGuaranteed, FatalError, PResult,
@@ -1384,8 +1385,8 @@ fn report_ice(
 ) {
     let fallback_bundle =
         rustc_errors::fallback_fluent_bundle(crate::DEFAULT_LOCALE_RESOURCES.to_vec(), false);
-    let emitter = Box::new(rustc_errors::emitter::HumanEmitter::stderr(
-        rustc_errors::ColorConfig::Auto,
+    let emitter = Box::new(rustc_errors::emitter::HumanEmitter::new(
+        stderr_destination(rustc_errors::ColorConfig::Auto),
         fallback_bundle,
     ));
     let dcx = rustc_errors::DiagCtxt::new(emitter);

compiler/rustc_errors/src/emitter.rs

@@ -646,10 +646,6 @@ pub(crate) struct FileWithAnnotatedLines {
 }
 
 impl HumanEmitter {
-    pub fn stderr(color_config: ColorConfig, fallback_bundle: LazyFallbackBundle) -> HumanEmitter {
-        Self::new(from_stderr(color_config), fallback_bundle)
-    }
-
     pub fn new(dst: Destination, fallback_bundle: LazyFallbackBundle) -> HumanEmitter {
         HumanEmitter {
             dst: IntoDynSyncSend(dst),
@@ -2650,7 +2646,7 @@ impl WriteColor for Buffy {
     }
 }
 
-fn from_stderr(color: ColorConfig) -> Destination {
+pub fn stderr_destination(color: ColorConfig) -> Destination {
     let choice = color.to_color_choice();
     // On Windows we'll be performing global synchronization on the entire
     // system for emitting rustc errors, so there's no need to buffer

compiler/rustc_errors/src/json/tests.rs

@@ -1,6 +1,7 @@
 use super::*;
 
 use crate::DiagCtxt;
+use rustc_span::source_map::FilePathMapping;
 use rustc_span::BytePos;
 
 use std::str;

compiler/rustc_session/src/parse.rs

@@ -13,7 +13,7 @@ use crate::Session;
 use rustc_ast::node_id::NodeId;
 use rustc_data_structures::fx::{FxHashMap, FxIndexMap, FxIndexSet};
 use rustc_data_structures::sync::{AppendOnlyVec, Lock, Lrc};
-use rustc_errors::emitter::{HumanEmitter, SilentEmitter};
+use rustc_errors::emitter::{stderr_destination, HumanEmitter, SilentEmitter};
 use rustc_errors::{
     fallback_fluent_bundle, ColorConfig, Diag, DiagCtxt, DiagnosticMessage, EmissionGuarantee,
     MultiSpan, StashKey,
@@ -237,8 +237,10 @@ impl ParseSess {
     pub fn new(locale_resources: Vec<&'static str>, file_path_mapping: FilePathMapping) -> Self {
         let fallback_bundle = fallback_fluent_bundle(locale_resources, false);
         let sm = Lrc::new(SourceMap::new(file_path_mapping));
-        let emitter =
-            Box::new(HumanEmitter::stderr(ColorConfig::Auto, fallback_bundle).sm(Some(sm.clone())));
+        let emitter = Box::new(
+            HumanEmitter::new(stderr_destination(ColorConfig::Auto), fallback_bundle)
+                .sm(Some(sm.clone())),
+        );
         let dcx = DiagCtxt::new(emitter);
         ParseSess::with_dcx(dcx, sm)
     }
@@ -268,7 +270,8 @@ impl ParseSess {
     pub fn with_silent_emitter(fatal_note: String) -> Self {
         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 emitter =
+            Box::new(HumanEmitter::new(stderr_destination(ColorConfig::Auto), fallback_bundle));
         let fatal_dcx = DiagCtxt::new(emitter);
         let dcx =
             DiagCtxt::new(Box::new(SilentEmitter { fatal_dcx, fatal_note })).disable_warnings();

compiler/rustc_session/src/session.rs

@@ -18,7 +18,7 @@ use rustc_data_structures::sync::{
     AtomicU64, DynSend, DynSync, Lock, Lrc, MappedReadGuard, ReadGuard, RwLock,
 };
 use rustc_errors::annotate_snippet_emitter_writer::AnnotateSnippetEmitter;
-use rustc_errors::emitter::{DynEmitter, HumanEmitter, HumanReadableErrorType};
+use rustc_errors::emitter::{stderr_destination, DynEmitter, HumanEmitter, HumanReadableErrorType};
 use rustc_errors::json::JsonEmitter;
 use rustc_errors::registry::Registry;
 use rustc_errors::{
@@ -982,7 +982,7 @@ fn default_emitter(
                 );
                 Box::new(emitter.ui_testing(sopts.unstable_opts.ui_testing))
             } else {
-                let emitter = HumanEmitter::stderr(color_config, fallback_bundle)
+                let emitter = HumanEmitter::new(stderr_destination(color_config), fallback_bundle)
                     .fluent_bundle(bundle)
                     .sm(Some(source_map))
                     .short_message(short)
@@ -1473,7 +1473,10 @@ fn mk_emitter(output: ErrorOutputType) -> Box<DynEmitter> {
     let emitter: Box<DynEmitter> = match output {
         config::ErrorOutputType::HumanReadable(kind) => {
             let (short, color_config) = kind.unzip();
-            Box::new(HumanEmitter::stderr(color_config, fallback_bundle).short_message(short))
+            Box::new(
+                HumanEmitter::new(stderr_destination(color_config), fallback_bundle)
+                    .short_message(short),
+            )
         }
         config::ErrorOutputType::Json { pretty, json_rendered } => Box::new(JsonEmitter::basic(
             pretty,

src/librustdoc/core.rs

@@ -1,7 +1,7 @@
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::sync::Lrc;
 use rustc_data_structures::unord::UnordSet;
-use rustc_errors::emitter::{DynEmitter, HumanEmitter};
+use rustc_errors::emitter::{stderr_destination, DynEmitter, HumanEmitter};
 use rustc_errors::json::JsonEmitter;
 use rustc_errors::{codes::*, ErrorGuaranteed, TerminalUrl};
 use rustc_feature::UnstableFeatures;
@@ -141,7 +141,7 @@ pub(crate) fn new_dcx(
         ErrorOutputType::HumanReadable(kind) => {
             let (short, color_config) = kind.unzip();
             Box::new(
-                HumanEmitter::stderr(color_config, fallback_bundle)
+                HumanEmitter::new(stderr_destination(color_config), fallback_bundle)
                     .sm(source_map.map(|sm| sm as _))
                     .short_message(short)
                     .teach(unstable_opts.teach)

src/librustdoc/doctest.rs

@@ -1,6 +1,7 @@
 use rustc_ast as ast;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::sync::Lrc;
+use rustc_errors::emitter::stderr_destination;
 use rustc_errors::{ColorConfig, ErrorGuaranteed, FatalError};
 use rustc_hir::def_id::{LocalDefId, CRATE_DEF_ID, LOCAL_CRATE};
 use rustc_hir::{self as hir, intravisit, CRATE_HIR_ID};
@@ -577,7 +578,8 @@ pub(crate) fn make_test(
                 false,
             );
             supports_color =
-                HumanEmitter::stderr(ColorConfig::Auto, fallback_bundle.clone()).supports_color();
+                HumanEmitter::new(stderr_destination(ColorConfig::Auto), fallback_bundle.clone())
+                    .supports_color();
 
             let emitter = HumanEmitter::new(Box::new(io::sink()), fallback_bundle);
 

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

@@ -3,7 +3,7 @@ use std::path::Path;
 use std::sync::atomic::{AtomicBool, Ordering};
 
 use rustc_data_structures::sync::{IntoDynSyncSend, Lrc};
-use rustc_errors::emitter::{DynEmitter, Emitter, HumanEmitter};
+use rustc_errors::emitter::{stderr_destination, DynEmitter, Emitter, HumanEmitter};
 use rustc_errors::translation::Translate;
 use rustc_errors::{
     ColorConfig, Diag, DiagCtxt, DiagInner, ErrorGuaranteed, Level as DiagnosticLevel,
@@ -152,7 +152,10 @@ fn default_dcx(
             rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
             false,
         );
-        Box::new(HumanEmitter::stderr(emit_color, fallback_bundle).sm(Some(source_map.clone())))
+        Box::new(
+            HumanEmitter::new(stderr_destination(emit_color), fallback_bundle)
+                .sm(Some(source_map.clone())),
+        )
     };
     DiagCtxt::new(Box::new(SilentOnIgnoredFilesEmitter {
         has_non_ignorable_parser_errors: false,