Auto merge of #114104 - oli-obk:syn2, r=compiler-errors

bors · bors · commit e3d6bf8daa5b · 2023-08-04T18:46:19.000Z
Lots of tiny incremental simplifications of `EmitterWriter` internals ignore the first commit, it's #114088 squashed and rebased, but it's needed to use to use `derive_setters`, as they need a newer `syn` version. Then this PR starts out with removing many arguments that are almost always defaulted to `None` or `false` and replace them with builder methods that can set these fields in the few cases that want to set them. After that it's one commit after the other that removes or merges things until everything becomes some very simple trait objects
diff --git a/src/parse/session.rs b/src/parse/session.rs
@@ -4,7 +4,7 @@ use std::sync::atomic::{AtomicBool, Ordering};
 use rustc_data_structures::sync::{Lrc, Send};
 use rustc_errors::emitter::{Emitter, EmitterWriter};
 use rustc_errors::translation::Translate;
-use rustc_errors::{ColorConfig, Diagnostic, Handler, Level as DiagnosticLevel, TerminalUrl};
+use rustc_errors::{ColorConfig, Diagnostic, Handler, Level as DiagnosticLevel};
 use rustc_session::parse::ParseSess as RawParseSess;
 use rustc_span::{
     source_map::{FilePathMapping, SourceMap},
@@ -139,18 +139,7 @@ fn default_handler(
             rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
             false,
         );
-        Box::new(EmitterWriter::stderr(
-            emit_color,
-            Some(source_map.clone()),
-            None,
-            fallback_bundle,
-            false,
-            false,
-            None,
-            false,
-            false,
-            TerminalUrl::No,
-        ))
+        Box::new(EmitterWriter::stderr(emit_color, fallback_bundle).sm(Some(source_map.clone())))
     };
     Handler::with_emitter(Box::new(SilentOnIgnoredFilesEmitter {
         has_non_ignorable_parser_errors: false,
