Use assoc integer constants in librustc_*

src/librustc_codegen_ssa/back/write.rs

@@ -1528,7 +1528,7 @@ fn start_executing_work<B: ExtraBackendMethods>(
     }
 }
 
-pub const CODEGEN_WORKER_ID: usize = ::std::usize::MAX;
+pub const CODEGEN_WORKER_ID: usize = usize::MAX;
 
 /// `FatalError` is explicitly not `Send`.
 #[must_use]

src/librustc_codegen_ssa/base.rs

@@ -507,7 +507,7 @@ fn get_argc_argv<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
     }
 }
 
-pub const CODEGEN_WORKER_ID: usize = ::std::usize::MAX;
+pub const CODEGEN_WORKER_ID: usize = usize::MAX;
 
 pub fn codegen_crate<B: ExtraBackendMethods>(
     backend: B,

src/librustc_errors/emitter.rs

@@ -1361,7 +1361,7 @@ impl EmitterWriter {
                 let mut multilines = FxHashMap::default();
 
                 // Get the left-side margin to remove it
-                let mut whitespace_margin = std::usize::MAX;
+                let mut whitespace_margin = usize::MAX;
                 for line_idx in 0..annotated_file.lines.len() {
                     let file = annotated_file.file.clone();
                     let line = &annotated_file.lines[line_idx];
@@ -1373,19 +1373,19 @@ impl EmitterWriter {
                         }
                     }
                 }
-                if whitespace_margin == std::usize::MAX {
+                if whitespace_margin == usize::MAX {
                     whitespace_margin = 0;
                 }
 
                 // Left-most column any visible span points at.
-                let mut span_left_margin = std::usize::MAX;
+                let mut span_left_margin = usize::MAX;
                 for line in &annotated_file.lines {
                     for ann in &line.annotations {
                         span_left_margin = min(span_left_margin, ann.start_col);
                         span_left_margin = min(span_left_margin, ann.end_col);
                     }
                 }
-                if span_left_margin == std::usize::MAX {
+                if span_left_margin == usize::MAX {
                     span_left_margin = 0;
                 }
 
@@ -1421,7 +1421,7 @@ impl EmitterWriter {
                 } else {
                     termize::dimensions()
                         .map(|(w, _)| w.saturating_sub(code_offset))
-                        .unwrap_or(std::usize::MAX)
+                        .unwrap_or(usize::MAX)
                 };
 
                 let margin = Margin::new(

src/librustc_index/bit_set.rs

@@ -307,7 +307,7 @@ impl<'a, T: Idx> BitIter<'a, T> {
         // additional state about whether we have started.
         BitIter {
             word: 0,
-            offset: std::usize::MAX - (WORD_BITS - 1),
+            offset: usize::MAX - (WORD_BITS - 1),
             iter: words.iter(),
             marker: PhantomData,
         }

src/librustc_trait_selection/traits/object_safety.rs

@@ -616,7 +616,7 @@ fn receiver_is_dispatchable<'tcx>(
     // FIXME(mikeyhew) this is a total hack. Once object_safe_for_dispatch is stabilized, we can
     // replace this with `dyn Trait`
     let unsized_self_ty: Ty<'tcx> =
-        tcx.mk_ty_param(::std::u32::MAX, Symbol::intern("RustaceansAreAwesome"));
+        tcx.mk_ty_param(u32::MAX, Symbol::intern("RustaceansAreAwesome"));
 
     // `Receiver[Self => U]`
     let unsized_receiver_ty =

src/librustc_trait_selection/traits/select.rs

@@ -3625,11 +3625,7 @@ struct ProvisionalEvaluation {
 
 impl<'tcx> Default for ProvisionalEvaluationCache<'tcx> {
     fn default() -> Self {
-        Self {
-            dfn: Cell::new(0),
-            reached_depth: Cell::new(std::usize::MAX),
-            map: Default::default(),
-        }
+        Self { dfn: Cell::new(0), reached_depth: Cell::new(usize::MAX), map: Default::default() }
     }
 }
 
@@ -3728,7 +3724,7 @@ impl<'tcx> ProvisionalEvaluationCache<'tcx> {
             op(fresh_trait_ref, eval.result);
         }
 
-        self.reached_depth.set(std::usize::MAX);
+        self.reached_depth.set(usize::MAX);
     }
 }
 

src/librustc_typeck/collect.rs

@@ -2620,13 +2620,13 @@ fn check_link_ordinal(tcx: TyCtxt<'_>, attr: &ast::Attribute) -> Option<usize> {
         _ => None,
     };
     if let Some(Lit { kind: LitKind::Int(ordinal, LitIntType::Unsuffixed), .. }) = sole_meta_list {
-        if *ordinal <= std::usize::MAX as u128 {
+        if *ordinal <= usize::MAX as u128 {
             Some(*ordinal as usize)
         } else {
             let msg = format!("ordinal value in `link_ordinal` is too large: `{}`", &ordinal);
             tcx.sess
                 .struct_span_err(attr.span, &msg)
-                .note("the value may not exceed `std::usize::MAX`")
+                .note("the value may not exceed `usize::MAX`")
                 .emit();
             None
         }

src/test/ui/rfc-2627-raw-dylib/link-ordinal-too-large.stderr

@@ -12,7 +12,7 @@ error: ordinal value in `link_ordinal` is too large: `18446744073709551616`
 LL |     #[link_ordinal(18446744073709551616)]
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = note: the value may not exceed `std::usize::MAX`
+   = note: the value may not exceed `usize::MAX`
 
 error: aborting due to previous error