Auto merge of rust-lang#77867 - JohnTitor:rollup-0odg1n4, r=JohnTitor

Rollup of 10 pull requests

Successful merges:

 - rust-lang#77550 (add shims for WithOptConstParam query calls)
 - rust-lang#77699 (Add word wrap for short descriptions)
 - rust-lang#77724 (Implement `AsRawFd` for `StdinLock` etc. on WASI.)
 - rust-lang#77746 (Fix `x.py setup` sets `changelog-seen`)
 - rust-lang#77784 (Fix intra-docs link in core::ffi::VaList)
 - rust-lang#77811 (rustdoc: Make some functions private that don't need to be public)
 - rust-lang#77818 (Mono collector: replace pair of ints with Range)
 - rust-lang#77831 (Use std methods on char instead of open coding them)
 - rust-lang#77852 (update url in bootstrap README (gcc-rs -> cc-rs))
 - rust-lang#77863 (Remove `mark-i-m` from rustc-dev-guide maintainers)

Failed merges:

r? `@ghost`

Author: bors

compiler/rustc_builtin_macros/src/format_foreign.rs

@@ -385,7 +385,7 @@ pub mod printf {
         if let Start = state {
             match c {
                 '1'..='9' => {
-                    let end = at_next_cp_while(next, is_digit);
+                    let end = at_next_cp_while(next, char::is_ascii_digit);
                     match end.next_cp() {
                         // Yes, this *is* the parameter.
                         Some(('$', end2)) => {
@@ -427,7 +427,7 @@ pub mod printf {
                     move_to!(next);
                 }
                 '1'..='9' => {
-                    let end = at_next_cp_while(next, is_digit);
+                    let end = at_next_cp_while(next, char::is_ascii_digit);
                     state = Prec;
                     width = Some(Num::from_str(at.slice_between(end).unwrap(), None));
                     move_to!(end);
@@ -441,7 +441,7 @@ pub mod printf {
         }
 
         if let WidthArg = state {
-            let end = at_next_cp_while(at, is_digit);
+            let end = at_next_cp_while(at, char::is_ascii_digit);
             match end.next_cp() {
                 Some(('$', end2)) => {
                     state = Prec;
@@ -473,7 +473,7 @@ pub mod printf {
         if let PrecInner = state {
             match c {
                 '*' => {
-                    let end = at_next_cp_while(next, is_digit);
+                    let end = at_next_cp_while(next, char::is_ascii_digit);
                     match end.next_cp() {
                         Some(('$', end2)) => {
                             state = Length;
@@ -488,7 +488,7 @@ pub mod printf {
                     }
                 }
                 '0'..='9' => {
-                    let end = at_next_cp_while(next, is_digit);
+                    let end = at_next_cp_while(next, char::is_ascii_digit);
                     state = Length;
                     precision = Some(Num::from_str(at.slice_between(end).unwrap(), None));
                     move_to!(end);
@@ -563,12 +563,12 @@ pub mod printf {
 
     fn at_next_cp_while<F>(mut cur: Cur<'_>, mut pred: F) -> Cur<'_>
     where
-        F: FnMut(char) -> bool,
+        F: FnMut(&char) -> bool,
     {
         loop {
             match cur.next_cp() {
                 Some((c, next)) => {
-                    if pred(c) {
+                    if pred(&c) {
                         cur = next;
                     } else {
                         return cur;
@@ -579,14 +579,7 @@ pub mod printf {
         }
     }
 
-    fn is_digit(c: char) -> bool {
-        match c {
-            '0'..='9' => true,
-            _ => false,
-        }
-    }
-
-    fn is_flag(c: char) -> bool {
+    fn is_flag(c: &char) -> bool {
         match c {
             '0' | '-' | '+' | ' ' | '#' | '\'' => true,
             _ => false,
@@ -723,17 +716,11 @@ pub mod shell {
     }
 
     fn is_ident_head(c: char) -> bool {
-        match c {
-            'a'..='z' | 'A'..='Z' | '_' => true,
-            _ => false,
-        }
+        c.is_ascii_alphabetic() || c == '_'
     }
 
     fn is_ident_tail(c: char) -> bool {
-        match c {
-            '0'..='9' => true,
-            c => is_ident_head(c),
-        }
+        c.is_ascii_alphanumeric() || c == '_'
     }
 
     #[cfg(test)]

compiler/rustc_middle/src/mir/query.rs

@@ -1,9 +1,10 @@
 //! Values computed by queries that use MIR.
 
-use crate::mir::{Body, Promoted};
+use crate::mir::{abstract_const, Body, Promoted};
 use crate::ty::{self, Ty, TyCtxt};
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::sync::Lrc;
+use rustc_errors::ErrorReported;
 use rustc_hir as hir;
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_index::bit_set::BitMatrix;
@@ -407,7 +408,12 @@ pub struct CoverageInfo {
     pub num_expressions: u32,
 }
 
+/// Shims which make dealing with `WithOptConstParam` easier.
+///
+/// For more information on why this is needed, consider looking
+/// at the docs for `WithOptConstParam` itself.
 impl<'tcx> TyCtxt<'tcx> {
+    #[inline]
     pub fn mir_borrowck_opt_const_arg(
         self,
         def: ty::WithOptConstParam<LocalDefId>,
@@ -419,6 +425,7 @@ impl<'tcx> TyCtxt<'tcx> {
         }
     }
 
+    #[inline]
     pub fn mir_const_qualif_opt_const_arg(
         self,
         def: ty::WithOptConstParam<LocalDefId>,
@@ -430,7 +437,8 @@ impl<'tcx> TyCtxt<'tcx> {
         }
     }
 
-    pub fn promoted_mir_of_opt_const_arg(
+    #[inline]
+    pub fn promoted_mir_opt_const_arg(
         self,
         def: ty::WithOptConstParam<DefId>,
     ) -> &'tcx IndexVec<Promoted, Body<'tcx>> {
@@ -440,4 +448,28 @@ impl<'tcx> TyCtxt<'tcx> {
             self.promoted_mir(def.did)
         }
     }
+
+    #[inline]
+    pub fn optimized_mir_opt_const_arg(
+        self,
+        def: ty::WithOptConstParam<DefId>,
+    ) -> &'tcx Body<'tcx> {
+        if let Some((did, param_did)) = def.as_const_arg() {
+            self.optimized_mir_of_const_arg((did, param_did))
+        } else {
+            self.optimized_mir(def.did)
+        }
+    }
+
+    #[inline]
+    pub fn mir_abstract_const_opt_const_arg(
+        self,
+        def: ty::WithOptConstParam<DefId>,
+    ) -> Result<Option<&'tcx [abstract_const::Node<'tcx>]>, ErrorReported> {
+        if let Some((did, param_did)) = def.as_const_arg() {
+            self.mir_abstract_const_of_const_arg((did, param_did))
+        } else {
+            self.mir_abstract_const(def.did)
+        }
+    }
 }

compiler/rustc_middle/src/ty/mod.rs

@@ -2953,13 +2953,7 @@ impl<'tcx> TyCtxt<'tcx> {
     /// Returns the possibly-auto-generated MIR of a `(DefId, Subst)` pair.
     pub fn instance_mir(self, instance: ty::InstanceDef<'tcx>) -> &'tcx Body<'tcx> {
         match instance {
-            ty::InstanceDef::Item(def) => {
-                if let Some((did, param_did)) = def.as_const_arg() {
-                    self.optimized_mir_of_const_arg((did, param_did))
-                } else {
-                    self.optimized_mir(def.did)
-                }
-            }
+            ty::InstanceDef::Item(def) => self.optimized_mir_opt_const_arg(def),
             ty::InstanceDef::VtableShim(..)
             | ty::InstanceDef::ReifyShim(..)
             | ty::InstanceDef::Intrinsic(..)

compiler/rustc_mir/src/const_eval/eval_queries.rs

@@ -343,7 +343,7 @@ pub fn eval_to_allocation_raw_provider<'tcx>(
                     // deny-by-default lint
                     _ => {
                         if let Some(p) = cid.promoted {
-                            let span = tcx.promoted_mir_of_opt_const_arg(def.to_global())[p].span;
+                            let span = tcx.promoted_mir_opt_const_arg(def.to_global())[p].span;
                             if let err_inval!(ReferencedConstant) = err.error {
                                 Err(err.report_as_error(
                                     tcx.at(span),

compiler/rustc_mir/src/interpret/eval_context.rs

@@ -477,16 +477,12 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         }
         trace!("load mir(instance={:?}, promoted={:?})", instance, promoted);
         if let Some(promoted) = promoted {
-            return Ok(&self.tcx.promoted_mir_of_opt_const_arg(def)[promoted]);
+            return Ok(&self.tcx.promoted_mir_opt_const_arg(def)[promoted]);
         }
         match instance {
             ty::InstanceDef::Item(def) => {
                 if self.tcx.is_mir_available(def.did) {
-                    if let Some((did, param_did)) = def.as_const_arg() {
-                        Ok(self.tcx.optimized_mir_of_const_arg((did, param_did)))
-                    } else {
-                        Ok(self.tcx.optimized_mir(def.did))
-                    }
+                    Ok(self.tcx.optimized_mir_opt_const_arg(def))
                 } else {
                     throw_unsup!(NoMirFor(def.did))
                 }

compiler/rustc_mir/src/monomorphize/collector.rs

@@ -197,6 +197,7 @@ use rustc_session::config::EntryFnType;
 use rustc_span::source_map::{dummy_spanned, respan, Span, Spanned, DUMMY_SP};
 use smallvec::SmallVec;
 use std::iter;
+use std::ops::Range;
 use std::path::PathBuf;
 
 #[derive(PartialEq)]
@@ -210,9 +211,8 @@ pub enum MonoItemCollectionMode {
 pub struct InliningMap<'tcx> {
     // Maps a source mono item to the range of mono items
     // accessed by it.
-    // The two numbers in the tuple are the start (inclusive) and
-    // end index (exclusive) within the `targets` vecs.
-    index: FxHashMap<MonoItem<'tcx>, (usize, usize)>,
+    // The range selects elements within the `targets` vecs.
+    index: FxHashMap<MonoItem<'tcx>, Range<usize>>,
     targets: Vec<MonoItem<'tcx>>,
 
     // Contains one bit per mono item in the `targets` field. That bit
@@ -245,7 +245,7 @@ impl<'tcx> InliningMap<'tcx> {
         }
 
         let end_index = self.targets.len();
-        assert!(self.index.insert(source, (start_index, end_index)).is_none());
+        assert!(self.index.insert(source, start_index..end_index).is_none());
     }
 
     // Internally iterate over all items referenced by `source` which will be
@@ -254,9 +254,9 @@ impl<'tcx> InliningMap<'tcx> {
     where
         F: FnMut(MonoItem<'tcx>),
     {
-        if let Some(&(start_index, end_index)) = self.index.get(&source) {
-            for (i, candidate) in self.targets[start_index..end_index].iter().enumerate() {
-                if self.inlines.contains(start_index + i) {
+        if let Some(range) = self.index.get(&source) {
+            for (i, candidate) in self.targets[range.clone()].iter().enumerate() {
+                if self.inlines.contains(range.start + i) {
                     f(*candidate);
                 }
             }
@@ -268,8 +268,8 @@ impl<'tcx> InliningMap<'tcx> {
     where
         F: FnMut(MonoItem<'tcx>, &[MonoItem<'tcx>]),
     {
-        for (&accessor, &(start_index, end_index)) in &self.index {
-            f(accessor, &self.targets[start_index..end_index])
+        for (&accessor, range) in &self.index {
+            f(accessor, &self.targets[range.clone()])
         }
     }
 }

compiler/rustc_mir/src/transform/mod.rs

@@ -287,11 +287,7 @@ fn mir_promoted(
     // this point, before we steal the mir-const result.
     // Also this means promotion can rely on all const checks having been done.
     let _ = tcx.mir_const_qualif_opt_const_arg(def);
-    let _ = if let Some(param_did) = def.const_param_did {
-        tcx.mir_abstract_const_of_const_arg((def.did, param_did))
-    } else {
-        tcx.mir_abstract_const(def.did.to_def_id())
-    };
+    let _ = tcx.mir_abstract_const_opt_const_arg(def.to_global());
     let mut body = tcx.mir_const(def).steal();
 
     let mut required_consts = Vec::new();

compiler/rustc_trait_selection/src/traits/const_evaluatable.rs

@@ -147,11 +147,7 @@ pub fn is_const_evaluatable<'cx, 'tcx>(
     if concrete.is_ok() && substs.has_param_types_or_consts() {
         match infcx.tcx.def_kind(def.did) {
             DefKind::AnonConst => {
-                let mir_body = if let Some(def) = def.as_const_arg() {
-                    infcx.tcx.optimized_mir_of_const_arg(def)
-                } else {
-                    infcx.tcx.optimized_mir(def.did)
-                };
+                let mir_body = infcx.tcx.optimized_mir_opt_const_arg(def);
 
                 if mir_body.is_polymorphic {
                     future_compat_lint();
@@ -212,13 +208,7 @@ impl AbstractConst<'tcx> {
         def: ty::WithOptConstParam<DefId>,
         substs: SubstsRef<'tcx>,
     ) -> Result<Option<AbstractConst<'tcx>>, ErrorReported> {
-        let inner = match (def.did.as_local(), def.const_param_did) {
-            (Some(did), Some(param_did)) => {
-                tcx.mir_abstract_const_of_const_arg((did, param_did))?
-            }
-            _ => tcx.mir_abstract_const(def.did)?,
-        };
-
+        let inner = tcx.mir_abstract_const_opt_const_arg(def)?;
         Ok(inner.map(|inner| AbstractConst { inner, substs }))
     }
 

library/core/src/ffi.rs

@@ -280,7 +280,7 @@ impl<'a, 'f: 'a> DerefMut for VaList<'a, 'f> {
 // within a private module. Once RFC 2145 has been implemented look into
 // improving this.
 mod sealed_trait {
-    /// Trait which permits the allowed types to be used with [VaList::arg].
+    /// Trait which permits the allowed types to be used with [super::VaListImpl::arg].
     #[unstable(
         feature = "c_variadic",
         reason = "the `c_variadic` feature has not been properly tested on \

library/std/src/sys/wasi/ext/io.rs

@@ -160,3 +160,21 @@ impl AsRawFd for io::Stderr {
         sys::stdio::Stderr.as_raw_fd()
     }
 }
+
+impl<'a> AsRawFd for io::StdinLock<'a> {
+    fn as_raw_fd(&self) -> RawFd {
+        sys::stdio::Stdin.as_raw_fd()
+    }
+}
+
+impl<'a> AsRawFd for io::StdoutLock<'a> {
+    fn as_raw_fd(&self) -> RawFd {
+        sys::stdio::Stdout.as_raw_fd()
+    }
+}
+
+impl<'a> AsRawFd for io::StderrLock<'a> {
+    fn as_raw_fd(&self) -> RawFd {
+        sys::stdio::Stderr.as_raw_fd()
+    }
+}