Rollup merge of rust-lang#69375 - Menschenkindlein:master, r=Dylan-DPC

Rename CodeMap to SourceMap follow up

See rust-lang#51574

Author: Dylan-DPC

src/librustc/ich/hcx.rs

@@ -149,7 +149,7 @@ impl<'a> StableHashingContext<'a> {
     #[inline]
     pub fn source_map(&mut self) -> &mut CachingSourceMapView<'a> {
         match self.caching_source_map {
-            Some(ref mut cm) => cm,
+            Some(ref mut sm) => sm,
             ref mut none => {
                 *none = Some(CachingSourceMapView::new(self.raw_source_map));
                 none.as_mut().unwrap()

src/librustc/middle/stability.rs

@@ -106,10 +106,10 @@ pub fn report_unstable(
     };
 
     let msp: MultiSpan = span.into();
-    let cm = &sess.parse_sess.source_map();
+    let sm = &sess.parse_sess.source_map();
     let span_key = msp.primary_span().and_then(|sp: Span| {
         if !sp.is_dummy() {
-            let file = cm.lookup_char_pos(sp.lo()).file;
+            let file = sm.lookup_char_pos(sp.lo()).file;
             if file.name.is_macros() { None } else { Some(span) }
         } else {
             None

src/librustc_ast_pretty/pprust.rs

@@ -47,15 +47,15 @@ pub struct NoAnn;
 impl PpAnn for NoAnn {}
 
 pub struct Comments<'a> {
-    cm: &'a SourceMap,
+    sm: &'a SourceMap,
     comments: Vec<comments::Comment>,
     current: usize,
 }
 
 impl<'a> Comments<'a> {
-    pub fn new(cm: &'a SourceMap, filename: FileName, input: String) -> Comments<'a> {
-        let comments = comments::gather_comments(cm, filename, input);
-        Comments { cm, comments, current: 0 }
+    pub fn new(sm: &'a SourceMap, filename: FileName, input: String) -> Comments<'a> {
+        let comments = comments::gather_comments(sm, filename, input);
+        Comments { sm, comments, current: 0 }
     }
 
     pub fn next(&self) -> Option<comments::Comment> {
@@ -71,8 +71,8 @@ impl<'a> Comments<'a> {
             if cmnt.style != comments::Trailing {
                 return None;
             }
-            let span_line = self.cm.lookup_char_pos(span.hi());
-            let comment_line = self.cm.lookup_char_pos(cmnt.pos);
+            let span_line = self.sm.lookup_char_pos(span.hi());
+            let comment_line = self.sm.lookup_char_pos(cmnt.pos);
             let next = next_pos.unwrap_or_else(|| cmnt.pos + BytePos(1));
             if span.hi() < cmnt.pos && cmnt.pos < next && span_line.line == comment_line.line {
                 return Some(cmnt);
@@ -95,7 +95,7 @@ crate const INDENT_UNIT: usize = 4;
 /// Requires you to pass an input filename and reader so that
 /// it can scan the input text for comments to copy forward.
 pub fn print_crate<'a>(
-    cm: &'a SourceMap,
+    sm: &'a SourceMap,
     krate: &ast::Crate,
     filename: FileName,
     input: String,
@@ -106,7 +106,7 @@ pub fn print_crate<'a>(
 ) -> String {
     let mut s = State {
         s: pp::mk_printer(),
-        comments: Some(Comments::new(cm, filename, input)),
+        comments: Some(Comments::new(sm, filename, input)),
         ann,
         is_expanded,
     };
@@ -522,8 +522,8 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
                 self.hardbreak();
             }
         }
-        if let Some(cm) = self.comments() {
-            cm.current += 1;
+        if let Some(cmnts) = self.comments() {
+            cmnts.current += 1;
         }
     }
 

src/librustc_driver/pretty.rs

@@ -452,8 +452,8 @@ pub fn print_after_hir_lowering<'tcx>(
             call_with_pp_support_hir(&s, tcx, move |annotation, krate| {
                 debug!("pretty printing source code {:?}", s);
                 let sess = annotation.sess();
-                let cm = sess.source_map();
-                *out = pprust_hir::print_crate(cm, krate, src_name, src, annotation.pp_ann())
+                let sm = sess.source_map();
+                *out = pprust_hir::print_crate(sm, krate, src_name, src, annotation.pp_ann())
             })
         }
 

src/librustc_errors/json.rs

@@ -373,13 +373,13 @@ impl DiagnosticSpan {
 
 impl DiagnosticSpanLine {
     fn line_from_source_file(
-        fm: &rustc_span::SourceFile,
+        sf: &rustc_span::SourceFile,
         index: usize,
         h_start: usize,
         h_end: usize,
     ) -> DiagnosticSpanLine {
         DiagnosticSpanLine {
-            text: fm.get_line(index).map_or(String::new(), |l| l.into_owned()),
+            text: sf.get_line(index).map_or(String::new(), |l| l.into_owned()),
             highlight_start: h_start,
             highlight_end: h_end,
         }
@@ -392,13 +392,13 @@ impl DiagnosticSpanLine {
         je.sm
             .span_to_lines(span)
             .map(|lines| {
-                let fm = &*lines.file;
+                let sf = &*lines.file;
                 lines
                     .lines
                     .iter()
                     .map(|line| {
                         DiagnosticSpanLine::line_from_source_file(
-                            fm,
+                            sf,
                             line.line_index,
                             line.start_col.0 + 1,
                             line.end_col.0 + 1,

src/librustc_errors/lib.rs

@@ -144,7 +144,7 @@ pub struct SubstitutionPart {
 impl CodeSuggestion {
     /// Returns the assembled code suggestions, whether they should be shown with an underline
     /// and whether the substitution only differs in capitalization.
-    pub fn splice_lines(&self, cm: &SourceMap) -> Vec<(String, Vec<SubstitutionPart>, bool)> {
+    pub fn splice_lines(&self, sm: &SourceMap) -> Vec<(String, Vec<SubstitutionPart>, bool)> {
         use rustc_span::{CharPos, Pos};
 
         fn push_trailing(
@@ -176,7 +176,7 @@ impl CodeSuggestion {
             .filter(|subst| {
                 // Suggestions coming from macros can have malformed spans. This is a heavy
                 // handed approach to avoid ICEs by ignoring the suggestion outright.
-                let invalid = subst.parts.iter().any(|item| cm.is_valid_span(item.span).is_err());
+                let invalid = subst.parts.iter().any(|item| sm.is_valid_span(item.span).is_err());
                 if invalid {
                     debug!("splice_lines: suggestion contains an invalid span: {:?}", subst);
                 }
@@ -193,7 +193,7 @@ impl CodeSuggestion {
                 let hi = substitution.parts.iter().map(|part| part.span.hi()).max()?;
                 let bounding_span = Span::with_root_ctxt(lo, hi);
                 // The different spans might belong to different contexts, if so ignore suggestion.
-                let lines = cm.span_to_lines(bounding_span).ok()?;
+                let lines = sm.span_to_lines(bounding_span).ok()?;
                 assert!(!lines.lines.is_empty());
 
                 // To build up the result, we do this for each span:
@@ -205,36 +205,36 @@ impl CodeSuggestion {
                 // - splice in the span substitution
                 //
                 // Finally push the trailing line segment of the last span
-                let fm = &lines.file;
-                let mut prev_hi = cm.lookup_char_pos(bounding_span.lo());
+                let sf = &lines.file;
+                let mut prev_hi = sm.lookup_char_pos(bounding_span.lo());
                 prev_hi.col = CharPos::from_usize(0);
 
-                let mut prev_line = fm.get_line(lines.lines[0].line_index);
+                let mut prev_line = sf.get_line(lines.lines[0].line_index);
                 let mut buf = String::new();
 
                 for part in &substitution.parts {
-                    let cur_lo = cm.lookup_char_pos(part.span.lo());
+                    let cur_lo = sm.lookup_char_pos(part.span.lo());
                     if prev_hi.line == cur_lo.line {
                         push_trailing(&mut buf, prev_line.as_ref(), &prev_hi, Some(&cur_lo));
                     } else {
                         push_trailing(&mut buf, prev_line.as_ref(), &prev_hi, None);
                         // push lines between the previous and current span (if any)
                         for idx in prev_hi.line..(cur_lo.line - 1) {
-                            if let Some(line) = fm.get_line(idx) {
+                            if let Some(line) = sf.get_line(idx) {
                                 buf.push_str(line.as_ref());
                                 buf.push('\n');
                             }
                         }
-                        if let Some(cur_line) = fm.get_line(cur_lo.line - 1) {
+                        if let Some(cur_line) = sf.get_line(cur_lo.line - 1) {
                             let end = std::cmp::min(cur_line.len(), cur_lo.col.to_usize());
                             buf.push_str(&cur_line[..end]);
                         }
                     }
                     buf.push_str(&part.snippet);
-                    prev_hi = cm.lookup_char_pos(part.span.hi());
-                    prev_line = fm.get_line(prev_hi.line - 1);
+                    prev_hi = sm.lookup_char_pos(part.span.hi());
+                    prev_line = sf.get_line(prev_hi.line - 1);
                 }
-                let only_capitalization = is_case_difference(cm, &buf, bounding_span);
+                let only_capitalization = is_case_difference(sm, &buf, bounding_span);
                 // if the replacement already ends with a newline, don't print the next line
                 if !buf.ends_with('\n') {
                     push_trailing(&mut buf, prev_line.as_ref(), &prev_hi, None);
@@ -363,23 +363,23 @@ impl Handler {
         color_config: ColorConfig,
         can_emit_warnings: bool,
         treat_err_as_bug: Option<usize>,
-        cm: Option<Lrc<SourceMap>>,
+        sm: Option<Lrc<SourceMap>>,
     ) -> Self {
         Self::with_tty_emitter_and_flags(
             color_config,
-            cm,
+            sm,
             HandlerFlags { can_emit_warnings, treat_err_as_bug, ..Default::default() },
         )
     }
 
     pub fn with_tty_emitter_and_flags(
         color_config: ColorConfig,
-        cm: Option<Lrc<SourceMap>>,
+        sm: Option<Lrc<SourceMap>>,
         flags: HandlerFlags,
     ) -> Self {
         let emitter = Box::new(EmitterWriter::stderr(
             color_config,
-            cm,
+            sm,
             false,
             false,
             None,

src/librustc_hir/print.rs

@@ -140,13 +140,13 @@ pub const INDENT_UNIT: usize = 4;
 /// Requires you to pass an input filename and reader so that
 /// it can scan the input text for comments to copy forward.
 pub fn print_crate<'a>(
-    cm: &'a SourceMap,
+    sm: &'a SourceMap,
     krate: &hir::Crate<'_>,
     filename: FileName,
     input: String,
     ann: &'a dyn PpAnn,
 ) -> String {
-    let mut s = State::new_from_input(cm, filename, input, ann);
+    let mut s = State::new_from_input(sm, filename, input, ann);
 
     // When printing the AST, we sometimes need to inject `#[no_std]` here.
     // Since you can't compile the HIR, it's not necessary.
@@ -158,12 +158,12 @@ pub fn print_crate<'a>(
 
 impl<'a> State<'a> {
     pub fn new_from_input(
-        cm: &'a SourceMap,
+        sm: &'a SourceMap,
         filename: FileName,
         input: String,
         ann: &'a dyn PpAnn,
     ) -> State<'a> {
-        State { s: pp::mk_printer(), comments: Some(Comments::new(cm, filename, input)), ann }
+        State { s: pp::mk_printer(), comments: Some(Comments::new(sm, filename, input)), ann }
     }
 }
 

src/librustc_infer/infer/error_reporting/mod.rs

@@ -194,7 +194,7 @@ fn msg_span_from_early_bound_and_free_regions(
     tcx: TyCtxt<'tcx>,
     region: ty::Region<'tcx>,
 ) -> (String, Option<Span>) {
-    let cm = tcx.sess.source_map();
+    let sm = tcx.sess.source_map();
 
     let scope = region.free_region_binding_scope(tcx);
     let node = tcx.hir().as_local_hir_id(scope).unwrap_or(hir::DUMMY_HIR_ID);
@@ -207,7 +207,7 @@ fn msg_span_from_early_bound_and_free_regions(
     };
     let (prefix, span) = match *region {
         ty::ReEarlyBound(ref br) => {
-            let mut sp = cm.def_span(tcx.hir().span(node));
+            let mut sp = sm.def_span(tcx.hir().span(node));
             if let Some(param) =
                 tcx.hir().get_generics(scope).and_then(|generics| generics.get_named(br.name))
             {
@@ -216,7 +216,7 @@ fn msg_span_from_early_bound_and_free_regions(
             (format!("the lifetime `{}` as defined on", br.name), sp)
         }
         ty::ReFree(ty::FreeRegion { bound_region: ty::BoundRegion::BrNamed(_, name), .. }) => {
-            let mut sp = cm.def_span(tcx.hir().span(node));
+            let mut sp = sm.def_span(tcx.hir().span(node));
             if let Some(param) =
                 tcx.hir().get_generics(scope).and_then(|generics| generics.get_named(name))
             {
@@ -230,7 +230,7 @@ fn msg_span_from_early_bound_and_free_regions(
             }
             _ => (
                 format!("the lifetime `{}` as defined on", region),
-                cm.def_span(tcx.hir().span(node)),
+                sm.def_span(tcx.hir().span(node)),
             ),
         },
         _ => bug!(),

src/librustc_parse/parser/expr.rs

@@ -1625,10 +1625,10 @@ impl<'a> Parser<'a> {
         let hi = self.token.span;
 
         if require_comma {
-            let cm = self.sess.source_map();
+            let sm = self.sess.source_map();
             self.expect_one_of(&[token::Comma], &[token::CloseDelim(token::Brace)]).map_err(
                 |mut err| {
-                    match (cm.span_to_lines(expr.span), cm.span_to_lines(arm_start_span)) {
+                    match (sm.span_to_lines(expr.span), sm.span_to_lines(arm_start_span)) {
                         (Ok(ref expr_lines), Ok(ref arm_start_lines))
                             if arm_start_lines.lines[0].end_col == expr_lines.lines[0].end_col
                                 && expr_lines.lines.len() == 2

src/librustc_passes/liveness.rs

@@ -144,11 +144,11 @@ enum LiveNodeKind {
 }
 
 fn live_node_kind_to_string(lnk: LiveNodeKind, tcx: TyCtxt<'_>) -> String {
-    let cm = tcx.sess.source_map();
+    let sm = tcx.sess.source_map();
     match lnk {
-        UpvarNode(s) => format!("Upvar node [{}]", cm.span_to_string(s)),
-        ExprNode(s) => format!("Expr node [{}]", cm.span_to_string(s)),
-        VarDefNode(s) => format!("Var def node [{}]", cm.span_to_string(s)),
+        UpvarNode(s) => format!("Upvar node [{}]", sm.span_to_string(s)),
+        ExprNode(s) => format!("Expr node [{}]", sm.span_to_string(s)),
+        VarDefNode(s) => format!("Var def node [{}]", sm.span_to_string(s)),
         ExitNode => "Exit node".to_owned(),
     }
 }

src/librustc_resolve/diagnostics.rs

@@ -90,9 +90,9 @@ impl<'tcx> Into<MissingLifetimeSpot<'tcx>> for &'tcx hir::Generics<'tcx> {
 /// *Attention*: the method used is very fragile since it essentially duplicates the work of the
 /// parser. If you need to use this function or something similar, please consider updating the
 /// `source_map` functions and this function to something more robust.
-fn reduce_impl_span_to_impl_keyword(cm: &SourceMap, impl_span: Span) -> Span {
-    let impl_span = cm.span_until_char(impl_span, '<');
-    let impl_span = cm.span_until_whitespace(impl_span);
+fn reduce_impl_span_to_impl_keyword(sm: &SourceMap, impl_span: Span) -> Span {
+    let impl_span = sm.span_until_char(impl_span, '<');
+    let impl_span = sm.span_until_whitespace(impl_span);
     impl_span
 }
 
@@ -136,14 +136,14 @@ impl<'a> Resolver<'a> {
                 );
                 err.span_label(span, format!("use of generic parameter from outer function"));
 
-                let cm = self.session.source_map();
+                let sm = self.session.source_map();
                 match outer_res {
                     Res::SelfTy(maybe_trait_defid, maybe_impl_defid) => {
                         if let Some(impl_span) =
                             maybe_impl_defid.and_then(|def_id| self.definitions.opt_span(def_id))
                         {
                             err.span_label(
-                                reduce_impl_span_to_impl_keyword(cm, impl_span),
+                                reduce_impl_span_to_impl_keyword(sm, impl_span),
                                 "`Self` type implicitly declared here, by this `impl`",
                             );
                         }
@@ -180,15 +180,15 @@ impl<'a> Resolver<'a> {
                     // Try to retrieve the span of the function signature and generate a new
                     // message with a local type or const parameter.
                     let sugg_msg = &format!("try using a local generic parameter instead");
-                    if let Some((sugg_span, snippet)) = cm.generate_local_type_param_snippet(span) {
+                    if let Some((sugg_span, snippet)) = sm.generate_local_type_param_snippet(span) {
                         // Suggest the modification to the user
                         err.span_suggestion(
                             sugg_span,
                             sugg_msg,
                             snippet,
                             Applicability::MachineApplicable,
                         );
-                    } else if let Some(sp) = cm.generate_fn_name_span(span) {
+                    } else if let Some(sp) = sm.generate_fn_name_span(span) {
                         err.span_label(
                             sp,
                             format!("try adding a local generic parameter in this method instead"),

src/librustc_resolve/late/diagnostics.rs

@@ -725,21 +725,21 @@ impl<'a> LateResolutionVisitor<'a, '_, '_> {
 
     /// Only used in a specific case of type ascription suggestions
     fn get_colon_suggestion_span(&self, start: Span) -> Span {
-        let cm = self.r.session.source_map();
-        start.to(cm.next_point(start))
+        let sm = self.r.session.source_map();
+        start.to(sm.next_point(start))
     }
 
     fn type_ascription_suggestion(&self, err: &mut DiagnosticBuilder<'_>, base_span: Span) {
-        let cm = self.r.session.source_map();
-        let base_snippet = cm.span_to_snippet(base_span);
+        let sm = self.r.session.source_map();
+        let base_snippet = sm.span_to_snippet(base_span);
         if let Some(sp) = self.diagnostic_metadata.current_type_ascription.last() {
             let mut sp = *sp;
             loop {
                 // Try to find the `:`; bail on first non-':' / non-whitespace.
-                sp = cm.next_point(sp);
-                if let Ok(snippet) = cm.span_to_snippet(sp.to(cm.next_point(sp))) {
-                    let line_sp = cm.lookup_char_pos(sp.hi()).line;
-                    let line_base_sp = cm.lookup_char_pos(base_span.lo()).line;
+                sp = sm.next_point(sp);
+                if let Ok(snippet) = sm.span_to_snippet(sp.to(sm.next_point(sp))) {
+                    let line_sp = sm.lookup_char_pos(sp.hi()).line;
+                    let line_base_sp = sm.lookup_char_pos(base_span.lo()).line;
                     if snippet == ":" {
                         let mut show_label = true;
                         if line_sp != line_base_sp {
@@ -753,7 +753,7 @@ impl<'a> LateResolutionVisitor<'a, '_, '_> {
                             let colon_sp = self.get_colon_suggestion_span(sp);
                             let after_colon_sp =
                                 self.get_colon_suggestion_span(colon_sp.shrink_to_hi());
-                            if !cm
+                            if !sm
                                 .span_to_snippet(after_colon_sp)
                                 .map(|s| s == " ")
                                 .unwrap_or(false)
@@ -770,8 +770,8 @@ impl<'a> LateResolutionVisitor<'a, '_, '_> {
                                 let mut sp = after_colon_sp;
                                 for _ in 0..100 {
                                     // Try to find an assignment
-                                    sp = cm.next_point(sp);
-                                    let snippet = cm.span_to_snippet(sp.to(cm.next_point(sp)));
+                                    sp = sm.next_point(sp);
+                                    let snippet = sm.span_to_snippet(sp.to(sm.next_point(sp)));
                                     match snippet {
                                         Ok(ref x) if x.as_str() == "=" => {
                                             err.span_suggestion(

src/librustc_save_analysis/dump_visitor.rs

@@ -1233,8 +1233,8 @@ impl<'l, 'tcx> Visitor<'l> for DumpVisitor<'l, 'tcx> {
         let qualname =
             format!("::{}", self.tcx.def_path_str(self.tcx.hir().local_def_id_from_node_id(id)));
 
-        let cm = self.tcx.sess.source_map();
-        let filename = cm.span_to_filename(span);
+        let sm = self.tcx.sess.source_map();
+        let filename = sm.span_to_filename(span);
         let data_id = id_from_node_id(id, &self.save_ctxt);
         let children = m.items.iter().map(|i| id_from_node_id(i.id, &self.save_ctxt)).collect();
         let span = self.span_from_span(span);

src/librustc_save_analysis/lib.rs

@@ -66,9 +66,9 @@ impl<'l, 'tcx> SaveContext<'l, 'tcx> {
     fn span_from_span(&self, span: Span) -> SpanData {
         use rls_span::{Column, Row};
 
-        let cm = self.tcx.sess.source_map();
-        let start = cm.lookup_char_pos(span.lo());
-        let end = cm.lookup_char_pos(span.hi());
+        let sm = self.tcx.sess.source_map();
+        let start = sm.lookup_char_pos(span.lo());
+        let end = sm.lookup_char_pos(span.hi());
 
         SpanData {
             file_name: start.file.name.to_string().into(),
@@ -258,8 +258,8 @@ impl<'l, 'tcx> SaveContext<'l, 'tcx> {
                     self.tcx.def_path_str(self.tcx.hir().local_def_id_from_node_id(item.id))
                 );
 
-                let cm = self.tcx.sess.source_map();
-                let filename = cm.span_to_filename(m.inner);
+                let sm = self.tcx.sess.source_map();
+                let filename = sm.span_to_filename(m.inner);
 
                 filter!(self.span_utils, item.ident.span);
 

src/librustc_session/parse.rs

@@ -124,9 +124,9 @@ pub struct ParseSess {
 
 impl ParseSess {
     pub fn new(file_path_mapping: FilePathMapping) -> Self {
-        let cm = Lrc::new(SourceMap::new(file_path_mapping));
-        let handler = Handler::with_tty_emitter(ColorConfig::Auto, true, None, Some(cm.clone()));
-        ParseSess::with_span_handler(handler, cm)
+        let sm = Lrc::new(SourceMap::new(file_path_mapping));
+        let handler = Handler::with_tty_emitter(ColorConfig::Auto, true, None, Some(sm.clone()));
+        ParseSess::with_span_handler(handler, sm)
     }
 
     pub fn with_span_handler(handler: Handler, source_map: Lrc<SourceMap>) -> Self {
@@ -148,9 +148,9 @@ impl ParseSess {
     }
 
     pub fn with_silent_emitter() -> Self {
-        let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
+        let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
         let handler = Handler::with_emitter(false, None, Box::new(SilentEmitter));
-        ParseSess::with_span_handler(handler, cm)
+        ParseSess::with_span_handler(handler, sm)
     }
 
     #[inline]

src/librustc_span/caching_source_map_view.rs

@@ -13,14 +13,14 @@ struct CacheEntry {
 }
 
 #[derive(Clone)]
-pub struct CachingSourceMapView<'cm> {
-    source_map: &'cm SourceMap,
+pub struct CachingSourceMapView<'sm> {
+    source_map: &'sm SourceMap,
     line_cache: [CacheEntry; 3],
     time_stamp: usize,
 }
 
-impl<'cm> CachingSourceMapView<'cm> {
-    pub fn new(source_map: &'cm SourceMap) -> CachingSourceMapView<'cm> {
+impl<'sm> CachingSourceMapView<'sm> {
+    pub fn new(source_map: &'sm SourceMap) -> CachingSourceMapView<'sm> {
         let files = source_map.files();
         let first_file = files[0].clone();
         let entry = CacheEntry {

src/librustc_typeck/check/demand.rs

@@ -324,13 +324,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         hir_id: hir::HirId,
         sp: Span,
     ) -> bool {
-        let cm = self.sess().source_map();
+        let sm = self.sess().source_map();
         let parent_id = self.tcx.hir().get_parent_node(hir_id);
         if let Some(parent) = self.tcx.hir().find(parent_id) {
             // Account for fields
             if let Node::Expr(hir::Expr { kind: hir::ExprKind::Struct(_, fields, ..), .. }) = parent
             {
-                if let Ok(src) = cm.span_to_snippet(sp) {
+                if let Ok(src) = sm.span_to_snippet(sp) {
                     for field in *fields {
                         if field.ident.as_str() == src && field.is_shorthand {
                             return true;
@@ -364,9 +364,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         checked_ty: Ty<'tcx>,
         expected: Ty<'tcx>,
     ) -> Option<(Span, &'static str, String)> {
-        let cm = self.sess().source_map();
+        let sm = self.sess().source_map();
         let sp = expr.span;
-        if !cm.span_to_filename(sp).is_real() {
+        if !sm.span_to_filename(sp).is_real() {
             // Ignore if span is from within a macro #41858, #58298. We previously used the macro
             // call span, but that breaks down when the type error comes from multiple calls down.
             return None;
@@ -388,7 +388,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     if arr == self.tcx.types.u8 =>
                 {
                     if let hir::ExprKind::Lit(_) = expr.kind {
-                        if let Ok(src) = cm.span_to_snippet(sp) {
+                        if let Ok(src) = sm.span_to_snippet(sp) {
                             if src.starts_with("b\"") {
                                 return Some((
                                     sp,
@@ -403,7 +403,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     if arr == self.tcx.types.u8 =>
                 {
                     if let hir::ExprKind::Lit(_) = expr.kind {
-                        if let Ok(src) = cm.span_to_snippet(sp) {
+                        if let Ok(src) = sm.span_to_snippet(sp) {
                             if src.starts_with("\"") {
                                 return Some((
                                     sp,
@@ -450,7 +450,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             sugg_sp = arg.span;
                         }
                     }
-                    if let Ok(src) = cm.span_to_snippet(sugg_sp) {
+                    if let Ok(src) = sm.span_to_snippet(sugg_sp) {
                         let needs_parens = match expr.kind {
                             // parenthesize if needed (Issue #46756)
                             hir::ExprKind::Cast(_, _) | hir::ExprKind::Binary(_, _, _) => true,
@@ -480,7 +480,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                                 //                                   |     |
                                 //    consider dereferencing here: `*opt`  |
                                 // expected mutable reference, found enum `Option`
-                                if let Ok(src) = cm.span_to_snippet(left_expr.span) {
+                                if let Ok(src) = sm.span_to_snippet(left_expr.span) {
                                     return Some((
                                         left_expr.span,
                                         "consider dereferencing here to assign to the mutable \
@@ -516,8 +516,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             {
                 // We have `&T`, check if what was expected was `T`. If so,
                 // we may want to suggest removing a `&`.
-                if !cm.span_to_filename(expr.span).is_real() {
-                    if let Ok(code) = cm.span_to_snippet(sp) {
+                if !sm.span_to_filename(expr.span).is_real() {
+                    if let Ok(code) = sm.span_to_snippet(sp) {
                         if code.chars().next() == Some('&') {
                             return Some((
                                 sp,
@@ -528,7 +528,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     }
                     return None;
                 }
-                if let Ok(code) = cm.span_to_snippet(expr.span) {
+                if let Ok(code) = sm.span_to_snippet(expr.span) {
                     return Some((sp, "consider removing the borrow", code));
                 }
             }
@@ -562,7 +562,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 let is_copy = self.infcx.type_is_copy_modulo_regions(self.param_env, expected, sp);
 
                 if is_copy && impls_deref {
-                    if let Ok(code) = cm.span_to_snippet(sp) {
+                    if let Ok(code) = sm.span_to_snippet(sp) {
                         let message = if checked_ty.is_region_ptr() {
                             "consider dereferencing the borrow"
                         } else {

src/librustc_typeck/coherence/orphan.rs

@@ -33,8 +33,8 @@ impl ItemLikeVisitor<'v> for OrphanChecker<'tcx> {
             );
             let trait_ref = self.tcx.impl_trait_ref(def_id).unwrap();
             let trait_def_id = trait_ref.def_id;
-            let cm = self.tcx.sess.source_map();
-            let sp = cm.def_span(item.span);
+            let sm = self.tcx.sess.source_map();
+            let sp = sm.def_span(item.span);
             match traits::orphan_check(self.tcx, def_id) {
                 Ok(()) => {}
                 Err(traits::OrphanCheckErr::NonLocalInputType(tys)) => {

src/librustdoc/clean/mod.rs

@@ -263,9 +263,9 @@ impl Clean<Item> for doctree::Module<'_> {
         // determine if we should display the inner contents or
         // the outer `mod` item for the source code.
         let whence = {
-            let cm = cx.sess().source_map();
-            let outer = cm.lookup_char_pos(self.where_outer.lo());
-            let inner = cm.lookup_char_pos(self.where_inner.lo());
+            let sm = cx.sess().source_map();
+            let outer = sm.lookup_char_pos(self.where_outer.lo());
+            let inner = sm.lookup_char_pos(self.where_inner.lo());
             if outer.file.start_pos == inner.file.start_pos {
                 // mod foo { ... }
                 self.where_outer
@@ -1917,10 +1917,10 @@ impl Clean<Span> for rustc_span::Span {
             return Span::empty();
         }
 
-        let cm = cx.sess().source_map();
-        let filename = cm.span_to_filename(*self);
-        let lo = cm.lookup_char_pos(self.lo());
-        let hi = cm.lookup_char_pos(self.hi());
+        let sm = cx.sess().source_map();
+        let filename = sm.span_to_filename(*self);
+        let lo = sm.lookup_char_pos(self.lo());
+        let hi = sm.lookup_char_pos(self.hi());
         Span {
             filename,
             loline: lo.line,

src/librustdoc/core.rs

@@ -177,7 +177,7 @@ pub fn new_handler(
             Box::new(
                 EmitterWriter::stderr(
                     color_config,
-                    source_map.map(|cm| cm as _),
+                    source_map.map(|sm| sm as _),
                     short,
                     debugging_opts.teach,
                     debugging_opts.terminal_width,

src/librustdoc/html/highlight.rs

@@ -38,11 +38,11 @@ pub fn render_with_highlighting(
     }
 
     let sess = ParseSess::with_silent_emitter();
-    let fm = sess
+    let sf = sess
         .source_map()
         .new_source_file(FileName::Custom(String::from("rustdoc-highlighting")), src.to_owned());
     let highlight_result = rustc_driver::catch_fatal_errors(|| {
-        let lexer = lexer::StringReader::new(&sess, fm, None);
+        let lexer = lexer::StringReader::new(&sess, sf, None);
         let mut classifier = Classifier::new(lexer, sess.source_map());
 
         let mut highlighted_source = vec![];

src/librustdoc/passes/check_code_block_syntax.rs

@@ -32,9 +32,9 @@ impl<'a, 'tcx> SyntaxChecker<'a, 'tcx> {
 
         let emitter = BufferEmitter { messages: Lrc::clone(&buffered_messages) };
 
-        let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
+        let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
         let handler = Handler::with_emitter(false, None, Box::new(emitter));
-        let sess = ParseSess::with_span_handler(handler, cm);
+        let sess = ParseSess::with_span_handler(handler, sm);
         let source_file = sess.source_map().new_source_file(
             FileName::Custom(String::from("doctest")),
             dox[code_block.code].to_owned(),

src/librustdoc/test.rs

@@ -402,12 +402,12 @@ pub fn make_test(
 
             // Any errors in parsing should also appear when the doctest is compiled for real, so just
             // send all the errors that libsyntax emits directly into a `Sink` instead of stderr.
-            let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
+            let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
             let emitter =
                 EmitterWriter::new(box io::sink(), None, false, false, false, None, false);
             // FIXME(misdreavus): pass `-Z treat-err-as-bug` to the doctest parser
             let handler = Handler::with_emitter(false, None, box emitter);
-            let sess = ParseSess::with_span_handler(handler, cm);
+            let sess = ParseSess::with_span_handler(handler, sm);
 
             let mut found_main = false;
             let mut found_extern_crate = cratename.is_none();

src/libsyntax/util/comments.rs

@@ -189,8 +189,8 @@ fn split_block_comment_into_lines(text: &str, col: CharPos) -> Vec<String> {
 // it appears this function is called only from pprust... that's
 // probably not a good thing.
 pub fn gather_comments(sm: &SourceMap, path: FileName, src: String) -> Vec<Comment> {
-    let cm = SourceMap::new(sm.path_mapping().clone());
-    let source_file = cm.new_source_file(path, src);
+    let sm = SourceMap::new(sm.path_mapping().clone());
+    let source_file = sm.new_source_file(path, src);
     let text = (*source_file.src.as_ref().unwrap()).clone();
 
     let text: &str = text.as_str();