Prettify rustc_session fmt with capturing args (nfc)

8 files changed, 64 insertions, 86 deletions

diff --git a/compiler/rustc_session/src/cgu_reuse_tracker.rs b/compiler/rustc_session/src/cgu_reuse_tracker.rs
index a9e14754334..dd64e8ab71e 100644
--- a/compiler/rustc_session/src/cgu_reuse_tracker.rs
+++ b/compiler/rustc_session/src/cgu_reuse_tracker.rs
@@ -52,7 +52,7 @@ impl CguReuseTracker {
 
     pub fn set_actual_reuse(&self, cgu_name: &str, kind: CguReuse) {
         if let Some(ref data) = self.data {
-            debug!("set_actual_reuse({:?}, {:?})", cgu_name, kind);
+            debug!("set_actual_reuse({cgu_name:?}, {kind:?})");
 
             let prev_reuse = data.lock().unwrap().actual_reuse.insert(cgu_name.to_string(), kind);
 
@@ -74,7 +74,7 @@ impl CguReuseTracker {
         comparison_kind: ComparisonKind,
     ) {
         if let Some(ref data) = self.data {
-            debug!("set_expectation({:?}, {:?}, {:?})", cgu_name, expected_reuse, comparison_kind);
+            debug!("set_expectation({cgu_name:?}, {expected_reuse:?}, {comparison_kind:?})");
             let mut data = data.lock().unwrap();
 
             data.expected_reuse.insert(
@@ -100,17 +100,15 @@ impl CguReuseTracker {
                     if error {
                         let at_least = if at_least { "at least " } else { "" };
                         let msg = format!(
-                            "CGU-reuse for `{}` is `{:?}` but \
-                                           should be {}`{:?}`",
-                            cgu_user_name, actual_reuse, at_least, expected_reuse
+                            "CGU-reuse for `{cgu_user_name}` is `{actual_reuse:?}` but \
+                                           should be {at_least}`{expected_reuse:?}`"
                         );
                         diag.span_err(error_span.0, &msg);
                     }
                 } else {
                     let msg = format!(
-                        "CGU-reuse for `{}` (mangled: `{}`) was \
-                                       not recorded",
-                        cgu_user_name, cgu_name
+                        "CGU-reuse for `{cgu_user_name}` (mangled: `{cgu_name}`) was \
+                                       not recorded"
                     );
                     diag.span_fatal(error_span.0, &msg)
                 }
diff --git a/compiler/rustc_session/src/code_stats.rs b/compiler/rustc_session/src/code_stats.rs
index c263da69c35..aa2b1f48daf 100644
--- a/compiler/rustc_session/src/code_stats.rs
+++ b/compiler/rustc_session/src/code_stats.rs
@@ -99,7 +99,7 @@ impl CodeStats {
             let indent = "    ";
 
             let discr_size = if let Some(discr_size) = info.opt_discr_size {
-                println!("print-type-size {}discriminant: {} bytes", indent, discr_size);
+                println!("print-type-size {indent}discriminant: {discr_size} bytes");
                 discr_size
             } else {
                 0
@@ -123,10 +123,8 @@ impl CodeStats {
                         None => i.to_string(),
                     };
                     println!(
-                        "print-type-size {}variant `{}`: {} bytes",
-                        indent,
-                        name,
-                        size - discr_size
+                        "print-type-size {indent}variant `{name}`: {diff} bytes",
+                        diff = size - discr_size
                     );
                     "        "
                 } else {
@@ -149,25 +147,23 @@ impl CodeStats {
 
                     if offset > min_offset {
                         let pad = offset - min_offset;
-                        println!("print-type-size {}padding: {} bytes", indent, pad);
+                        println!("print-type-size {indent}padding: {pad} bytes");
                     }
 
                     if offset < min_offset {
                         // If this happens it's probably a union.
                         println!(
-                            "print-type-size {}field `.{}`: {} bytes, \
-                                  offset: {} bytes, \
-                                  alignment: {} bytes",
-                            indent, name, size, offset, align
+                            "print-type-size {indent}field `.{name}`: {size} bytes, \
+                                  offset: {offset} bytes, \
+                                  alignment: {align} bytes"
                         );
                     } else if info.packed || offset == min_offset {
-                        println!("print-type-size {}field `.{}`: {} bytes", indent, name, size);
+                        println!("print-type-size {indent}field `.{name}`: {size} bytes");
                     } else {
                         // Include field alignment in output only if it caused padding injection
                         println!(
-                            "print-type-size {}field `.{}`: {} bytes, \
-                                  alignment: {} bytes",
-                            indent, name, size, align
+                            "print-type-size {indent}field `.{name}`: {size} bytes, \
+                                  alignment: {align} bytes"
                         );
                     }
 
diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 2357f5ad903..44a2e2bdc85 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -659,7 +659,7 @@ impl OutputFilenames {
             single_output_file,
             temps_directory,
             outputs,
-            filestem: format!("{}{}", out_filestem, extra),
+            filestem: format!("{out_filestem}{extra}"),
         }
     }
 
@@ -1514,7 +1514,7 @@ pub fn get_cmd_lint_options(
 
     let lint_cap = matches.opt_str("cap-lints").map(|cap| {
         lint::Level::from_str(&cap)
-            .unwrap_or_else(|| early_error(error_format, &format!("unknown lint level: `{}`", cap)))
+            .unwrap_or_else(|| early_error(error_format, &format!("unknown lint level: `{cap}`")))
     });
 
     (lint_opts, describe_lints, lint_cap)
@@ -1533,8 +1533,7 @@ pub fn parse_color(matches: &getopts::Matches) -> ColorConfig {
             ErrorOutputType::default(),
             &format!(
                 "argument for `--color` must be auto, \
-                 always or never (instead was `{}`)",
-                arg
+                 always or never (instead was `{arg}`)"
             ),
         ),
     }
@@ -1579,7 +1578,7 @@ pub fn parse_json(matches: &getopts::Matches) -> JsonConfig {
                 "future-incompat" => json_future_incompat = true,
                 s => early_error(
                     ErrorOutputType::default(),
-                    &format!("unknown `--json` option `{}`", s),
+                    &format!("unknown `--json` option `{s}`"),
                 ),
             }
         }
@@ -1619,8 +1618,7 @@ pub fn parse_error_format(
                 ErrorOutputType::HumanReadable(HumanReadableErrorType::Default(color)),
                 &format!(
                     "argument for `--error-format` must be `human`, `json` or \
-                     `short` (instead was `{}`)",
-                    arg
+                     `short` (instead was `{arg}`)"
                 ),
             ),
         }
@@ -1654,8 +1652,7 @@ pub fn parse_crate_edition(matches: &getopts::Matches) -> Edition {
                 ErrorOutputType::default(),
                 &format!(
                     "argument for `--edition` must be one of: \
-                     {}. (instead was `{}`)",
-                    EDITION_NAME_LIST, arg
+                     {EDITION_NAME_LIST}. (instead was `{arg}`)"
                 ),
             )
         }),
@@ -1670,7 +1667,7 @@ pub fn parse_crate_edition(matches: &getopts::Matches) -> Edition {
                 edition, LATEST_STABLE_EDITION
             )
         } else {
-            format!("edition {} is unstable and only available with -Z unstable-options", edition)
+            format!("edition {edition} is unstable and only available with -Z unstable-options")
         };
         early_error(ErrorOutputType::default(), &msg)
     }
@@ -1718,9 +1715,8 @@ fn parse_output_types(
                     early_error(
                         error_format,
                         &format!(
-                            "unknown emission type: `{}` - expected one of: {}",
-                            shorthand,
-                            OutputType::shorthands_display(),
+                            "unknown emission type: `{shorthand}` - expected one of: {display}",
+                            display = OutputType::shorthands_display(),
                         ),
                     )
                 });
@@ -1758,9 +1754,8 @@ fn should_override_cgus_and_disable_thinlto(
                         early_warn(
                             error_format,
                             &format!(
-                                "`--emit={}` with `-o` incompatible with \
+                                "`--emit={ot}` with `-o` incompatible with \
                                  `-C codegen-units=N` for N > 1",
-                                ot
                             ),
                         );
                     }
@@ -1835,7 +1830,7 @@ fn collect_print_requests(
             }
         }
         "link-args" => PrintRequest::LinkArgs,
-        req => early_error(error_format, &format!("unknown print request `{}`", req)),
+        req => early_error(error_format, &format!("unknown print request `{req}`")),
     }));
 
     prints
@@ -1849,7 +1844,7 @@ pub fn parse_target_triple(
         Some(target) if target.ends_with(".json") => {
             let path = Path::new(&target);
             TargetTriple::from_path(&path).unwrap_or_else(|_| {
-                early_error(error_format, &format!("target file {:?} does not exist", path))
+                early_error(error_format, &format!("target file {path:?} does not exist"))
             })
         }
         Some(target) => TargetTriple::TargetTriple(target),
@@ -1892,8 +1887,7 @@ fn parse_opt_level(
                     error_format,
                     &format!(
                         "optimization level needs to be \
-                            between 0-3, s or z (instead was `{}`)",
-                        arg
+                            between 0-3, s or z (instead was `{arg}`)"
                     ),
                 );
             }
@@ -1927,8 +1921,7 @@ fn select_debuginfo(
                     error_format,
                     &format!(
                         "debug info level needs to be between \
-                         0-2 (instead was `{}`)",
-                        arg
+                         0-2 (instead was `{arg}`)"
                     ),
                 );
             }
@@ -1943,10 +1936,9 @@ crate fn parse_assert_incr_state(
     match opt_assertion {
         Some(s) if s.as_str() == "loaded" => Some(IncrementalStateAssertion::Loaded),
         Some(s) if s.as_str() == "not-loaded" => Some(IncrementalStateAssertion::NotLoaded),
-        Some(s) => early_error(
-            error_format,
-            &format!("unexpected incremental state assertion value: {}", s),
-        ),
+        Some(s) => {
+            early_error(error_format, &format!("unexpected incremental state assertion value: {s}"))
+        }
         None => None,
     }
 }
@@ -1991,7 +1983,7 @@ fn parse_native_lib_kind(
         }
         s => early_error(
             error_format,
-            &format!("unknown library kind `{}`, expected one of dylib, framework, or static", s),
+            &format!("unknown library kind `{s}`, expected one of dylib, framework, or static"),
         ),
     };
     match modifiers {
@@ -2066,9 +2058,8 @@ fn parse_native_lib_modifiers(
             _ => early_error(
                 error_format,
                 &format!(
-                    "unrecognized linking modifier `{}`, expected one \
-                    of: bundle, verbatim, whole-archive, as-needed",
-                    modifier
+                    "unrecognized linking modifier `{modifier}`, expected one \
+                    of: bundle, verbatim, whole-archive, as-needed"
                 ),
             ),
         }
@@ -2109,7 +2100,7 @@ fn parse_borrowck_mode(dopts: &DebuggingOptions, error_format: ErrorOutputType)
     match dopts.borrowck.as_ref() {
         "migrate" => BorrowckMode::Migrate,
         "mir" => BorrowckMode::Mir,
-        m => early_error(error_format, &format!("unknown borrowck mode `{}`", m)),
+        m => early_error(error_format, &format!("unknown borrowck mode `{m}`")),
     }
 }
 
@@ -2197,7 +2188,7 @@ pub fn parse_externs(
                             );
                         }
                     }
-                    _ => early_error(error_format, &format!("unknown --extern option `{}`", opt)),
+                    _ => early_error(error_format, &format!("unknown --extern option `{opt}`")),
                 }
             }
         }
@@ -2234,7 +2225,7 @@ fn parse_extern_dep_specs(
         let loc = parts.next().unwrap_or_else(|| {
             early_error(
                 error_format,
-                &format!("`--extern-location`: specify location for extern crate `{}`", name),
+                &format!("`--extern-location`: specify location for extern crate `{name}`"),
             )
         });
 
@@ -2255,14 +2246,14 @@ fn parse_extern_dep_specs(
                 let json = json::from_str(raw).unwrap_or_else(|_| {
                     early_error(
                         error_format,
-                        &format!("`--extern-location`: malformed json location `{}`", raw),
+                        &format!("`--extern-location`: malformed json location `{raw}`"),
                     )
                 });
                 ExternDepSpec::Json(json)
             }
             [bad, ..] => early_error(
                 error_format,
-                &format!("unknown location type `{}`: use `raw` or `json`", bad),
+                &format!("unknown location type `{bad}`: use `raw` or `json`"),
             ),
             [] => early_error(error_format, "missing location specification"),
         };
@@ -2527,9 +2518,7 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
         && !target_triple.triple().contains("apple")
         && cg.split_debuginfo.is_some()
     {
-        {
-            early_error(error_format, "`-Csplit-debuginfo` is unstable on this platform");
-        }
+        early_error(error_format, "`-Csplit-debuginfo` is unstable on this platform");
     }
 
     // Try to find a directory containing the Rust `src`, for more details see
@@ -2561,7 +2550,7 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
     };
 
     let working_dir = std::env::current_dir().unwrap_or_else(|e| {
-        early_error(error_format, &format!("Current directory is invalid: {}", e));
+        early_error(error_format, &format!("Current directory is invalid: {e}"));
     });
 
     let (path, remapped) =
@@ -2636,12 +2625,11 @@ fn parse_pretty(debugging_opts: &DebuggingOptions, efmt: ErrorOutputType) -> Opt
                 "argument to `unpretty` must be one of `normal`, `identified`, \
                             `expanded`, `expanded,identified`, `expanded,hygiene`, \
                             `ast-tree`, `ast-tree,expanded`, `hir`, `hir,identified`, \
-                            `hir,typed`, `hir-tree`, `thir-tree`, `mir` or `mir-cfg`; got {}",
-                name
+                            `hir,typed`, `hir-tree`, `thir-tree`, `mir` or `mir-cfg`; got {name}"
             ),
         ),
     };
-    tracing::debug!("got unpretty option: {:?}", first);
+    tracing::debug!("got unpretty option: {first:?}");
     Some(first)
 }
 
@@ -2667,7 +2655,7 @@ pub fn parse_crate_types_from_list(list_list: Vec<String>) -> Result<Vec<CrateTy
                 "cdylib" => CrateType::Cdylib,
                 "bin" => CrateType::Executable,
                 "proc-macro" => CrateType::ProcMacro,
-                _ => return Err(format!("unknown crate type: `{}`", part)),
+                _ => return Err(format!("unknown crate type: `{part}`")),
             };
             if !crate_types.contains(&new_part) {
                 crate_types.push(new_part)
diff --git a/compiler/rustc_session/src/filesearch.rs b/compiler/rustc_session/src/filesearch.rs
index 9200be363ad..c973e3140ce 100644
--- a/compiler/rustc_session/src/filesearch.rs
+++ b/compiler/rustc_session/src/filesearch.rs
@@ -85,7 +85,7 @@ pub fn get_or_default_sysroot() -> PathBuf {
                 p.pop();
                 p
             }
-            Err(e) => panic!("failed to get current_exe: {}", e),
+            Err(e) => panic!("failed to get current_exe: {e}"),
         }
     }
 
diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs
index 0289b962a5a..463c5c9d8b5 100644
--- a/compiler/rustc_session/src/options.rs
+++ b/compiler/rustc_session/src/options.rs
@@ -345,14 +345,13 @@ fn build_options<O: Default>(
                         Some(value) => early_error(
                             error_format,
                             &format!(
-                                "incorrect value `{}` for {} option `{}` - {} was expected",
-                                value, outputname, key, type_desc
+                                "incorrect value `{value}` for {outputname} option `{key}` - {type_desc} was expected"
                             ),
                         ),
                     }
                 }
             }
-            None => early_error(error_format, &format!("unknown {} option: `{}`", outputname, key)),
+            None => early_error(error_format, &format!("unknown {outputname} option: `{key}`")),
         }
     }
     return op;
diff --git a/compiler/rustc_session/src/output.rs b/compiler/rustc_session/src/output.rs
index 7f696da86f2..c6648f9d740 100644
--- a/compiler/rustc_session/src/output.rs
+++ b/compiler/rustc_session/src/output.rs
@@ -63,8 +63,7 @@ pub fn find_crate_name(sess: &Session, attrs: &[ast::Attribute], input: &Input)
             if name.as_str() != s {
                 let msg = format!(
                     "`--crate-name` and `#[crate_name]` are \
-                                   required to match, but `{}` != `{}`",
-                    s, name
+                                   required to match, but `{s}` != `{name}`"
                 );
                 sess.span_err(attr.span, &msg);
             }
@@ -80,8 +79,7 @@ pub fn find_crate_name(sess: &Session, attrs: &[ast::Attribute], input: &Input)
             if s.starts_with('-') {
                 let msg = format!(
                     "crate names cannot start with a `-`, but \
-                                   `{}` has a leading hyphen",
-                    s
+                                   `{s}` has a leading hyphen"
                 );
                 sess.err(&msg);
             } else {
@@ -113,7 +111,7 @@ pub fn validate_crate_name(sess: &Session, s: &str, sp: Option<Span>) {
             if c == '_' {
                 continue;
             }
-            say(&format!("invalid character `{}` in crate name: `{}`", c, s));
+            say(&format!("invalid character `{c}` in crate name: `{s}`"));
         }
     }
 
@@ -137,7 +135,7 @@ pub fn filename_for_metadata(
     let out_filename = outputs
         .single_output_file
         .clone()
-        .unwrap_or_else(|| outputs.out_directory.join(&format!("lib{}.rmeta", libname)));
+        .unwrap_or_else(|| outputs.out_directory.join(&format!("lib{libname}.rmeta")));
 
     check_file_is_writeable(&out_filename, sess);
 
@@ -153,14 +151,14 @@ pub fn filename_for_input(
     let libname = format!("{}{}", crate_name, sess.opts.cg.extra_filename);
 
     match crate_type {
-        CrateType::Rlib => outputs.out_directory.join(&format!("lib{}.rlib", libname)),
+        CrateType::Rlib => outputs.out_directory.join(&format!("lib{libname}.rlib")),
         CrateType::Cdylib | CrateType::ProcMacro | CrateType::Dylib => {
             let (prefix, suffix) = (&sess.target.dll_prefix, &sess.target.dll_suffix);
-            outputs.out_directory.join(&format!("{}{}{}", prefix, libname, suffix))
+            outputs.out_directory.join(&format!("{prefix}{libname}{suffix}"))
         }
         CrateType::Staticlib => {
             let (prefix, suffix) = (&sess.target.staticlib_prefix, &sess.target.staticlib_suffix);
-            outputs.out_directory.join(&format!("{}{}{}", prefix, libname, suffix))
+            outputs.out_directory.join(&format!("{prefix}{libname}{suffix}"))
         }
         CrateType::Executable => {
             let suffix = &sess.target.exe_suffix;
diff --git a/compiler/rustc_session/src/parse.rs b/compiler/rustc_session/src/parse.rs
index 36bbccf1b90..6f0c4761841 100644
--- a/compiler/rustc_session/src/parse.rs
+++ b/compiler/rustc_session/src/parse.rs
@@ -120,14 +120,13 @@ pub fn add_feature_diagnostics_for_issue<'a>(
 ) {
     if let Some(n) = find_feature_issue(feature, issue) {
         err.note(&format!(
-            "see issue #{} <https://github.com/rust-lang/rust/issues/{}> for more information",
-            n, n,
+            "see issue #{n} <https://github.com/rust-lang/rust/issues/{n}> for more information"
         ));
     }
 
     // #23973: do not suggest `#![feature(...)]` if we are in beta/stable
     if sess.unstable_features.is_nightly_build() {
-        err.help(&format!("add `#![feature({})]` to the crate attributes to enable", feature));
+        err.help(&format!("add `#![feature({feature})]` to the crate attributes to enable"));
     }
 }
 
diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs
index 7eeb6f90f99..799e3822c29 100644
--- a/compiler/rustc_session/src/session.rs
+++ b/compiler/rustc_session/src/session.rs
@@ -88,7 +88,7 @@ impl From<usize> for Limit {
 
 impl fmt::Display for Limit {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}", self.0)
+        self.0.fmt(f)
     }
 }
 
@@ -252,8 +252,8 @@ impl Session {
             let mut diag = self.struct_warn("skipping const checks");
             for &(span, feature_gate) in unleashed_features.iter() {
                 // FIXME: `span_label` doesn't do anything, so we use "help" as a hack.
-                if let Some(feature_gate) = feature_gate {
-                    diag.span_help(span, &format!("skipping check for `{}` feature", feature_gate));
+                if let Some(gate) = feature_gate {
+                    diag.span_help(span, &format!("skipping check for `{gate}` feature"));
                     // The unleash flag must *not* be used to just "hack around" feature gates.
                     must_err = true;
                 } else {
@@ -1204,7 +1204,7 @@ pub fn build_session(
     let target_cfg = config::build_target_config(&sopts, target_override, &sysroot);
     let host_triple = TargetTriple::from_triple(config::host_triple());
     let (host, target_warnings) = Target::search(&host_triple, &sysroot).unwrap_or_else(|e| {
-        early_error(sopts.error_format, &format!("Error loading host specification: {}", e))
+        early_error(sopts.error_format, &format!("Error loading host specification: {e}"))
     });
     for warning in target_warnings.warning_messages() {
         early_warn(sopts.error_format, &warning)
@@ -1243,7 +1243,7 @@ pub fn build_session(
         match profiler {
             Ok(profiler) => Some(Arc::new(profiler)),
             Err(e) => {
-                early_warn(sopts.error_format, &format!("failed to create profiler: {}", e));
+                early_warn(sopts.error_format, &format!("failed to create profiler: {e}"));
                 None
             }
         }
@@ -1407,7 +1407,7 @@ fn validate_commandline_args_with_session_available(sess: &Session) {
     // Cannot mix and match sanitizers.
     let mut sanitizer_iter = sess.opts.debugging_opts.sanitizer.into_iter();
     if let (Some(first), Some(second)) = (sanitizer_iter.next(), sanitizer_iter.next()) {
-        sess.err(&format!("`-Zsanitizer={}` is incompatible with `-Zsanitizer={}`", first, second));
+        sess.err(&format!("`-Zsanitizer={first}` is incompatible with `-Zsanitizer={second}`"));
     }
 
     // Cannot enable crt-static with sanitizers on Linux