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Auto merge of #95889 - Dylan-DPC:rollup-1cmywu4, r=Dylan-DPC

Browse Source 
Rollup of 7 pull requests

Successful merges:

 - #95566 (Avoid duplication of doc comments in `std::char` constants and functions)
 - #95784 (Suggest replacing `typeof(...)` with an actual type)
 - #95807 (Suggest adding a local for vector to fix borrowck errors)
 - #95849 (Check for git submodules in non-git source tree.)
 - #95852 (Fix missing space in lossy provenance cast lint)
 - #95857 (Allow multiple derefs to be splitted in deref_separator)
 - #95868 (rustdoc: Reduce allocations in a `html::markdown` function)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2022-04-10 21:01:13 +00:00
commit 1f7fb6413d
22 changed files with 333 additions and 235 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs
View File

@ -785,13 +785,22 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
issued_borrow: &BorrowData<'tcx>,
explanation: BorrowExplanation,
) {
let used_in_call =
matches!(explanation, BorrowExplanation::UsedLater(LaterUseKind::Call, _call_span, _));
let used_in_call = matches!(
explanation,
BorrowExplanation::UsedLater(LaterUseKind::Call | LaterUseKind::Other, _call_span, _)
);
if !used_in_call {
debug!("not later used in call");
return;
}
let use_span =
if let BorrowExplanation::UsedLater(LaterUseKind::Other, use_span, _) = explanation {
Some(use_span)
} else {
None
};
let outer_call_loc =
if let TwoPhaseActivation::ActivatedAt(loc) = issued_borrow.activation_location {
loc
@ -835,7 +844,10 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
debug!("===> outer_call_loc = {:?}, inner_call_loc = {:?}", outer_call_loc, inner_call_loc);
let inner_call_span = inner_call_term.source_info.span;
let outer_call_span = outer_call_stmt.either(|s| s.source_info, |t| t.source_info).span;
let outer_call_span = match use_span {
Some(span) => span,
None => outer_call_stmt.either(|s| s.source_info, |t| t.source_info).span,
};
if outer_call_span == inner_call_span || !outer_call_span.contains(inner_call_span) {
// FIXME: This stops the suggestion in some cases where it should be emitted.
// Fix the spans for those cases so it's emitted correctly.
@ -845,8 +857,20 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
);
return;
}
err.span_help(inner_call_span, "try adding a local storing this argument...");
err.span_help(outer_call_span, "...and then using that local as the argument to this call");
err.span_help(
inner_call_span,
&format!(
"try adding a local storing this{}...",
if use_span.is_some() { "" } else { " argument" }
),
);
err.span_help(
outer_call_span,
&format!(
"...and then using that local {}",
if use_span.is_some() { "here" } else { "as the argument to this call" }
),
);
}
fn suggest_split_at_mut_if_applicable(
@ -1912,11 +1936,9 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
} else {
"cannot assign twice to immutable variable"
};
if span != assigned_span {
if !from_arg {
if span != assigned_span && !from_arg {
err.span_label(assigned_span, format!("first assignment to {}", place_description));
}
}
if let Some(decl) = local_decl
&& let Some(name) = local_name
&& decl.can_be_made_mutable()

1
compiler/rustc_error_messages/locales/en-US/diagnostics.ftl
View File

@ -62,6 +62,7 @@ typeck-functional-record-update-on-non-struct =
typeck-typeof-reserved-keyword-used =
`typeof` is a reserved keyword but unimplemented
.suggestion = consider replacing `typeof(...)` with an actual type
.label = reserved keyword
typeck-return-stmt-outside-of-fn-body =

16
compiler/rustc_mir_transform/src/deref_separator.rs
View File

@ -11,6 +11,8 @@ pub fn deref_finder<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
for (i, stmt) in data.statements.iter_mut().enumerate() {
match stmt.kind {
StatementKind::Assign(box (og_place, Rvalue::Ref(region, borrow_knd, place))) => {
let mut place_local = place.local;
let mut last_len = 0;
for (idx, (p_ref, p_elem)) in place.iter_projections().enumerate() {
if p_elem == ProjectionElem::Deref && !p_ref.projection.is_empty() {
// The type that we are derefing.
@ -23,15 +25,18 @@ pub fn deref_finder<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
patch.add_statement(loc, StatementKind::StorageLive(temp));
// We are adding current p_ref's projections to our
// temp value.
let deref_place =
Place::from(p_ref.local).project_deeper(p_ref.projection, tcx);
// temp value, excluding projections we already covered.
let deref_place = Place::from(place_local)
.project_deeper(&p_ref.projection[last_len..], tcx);
patch.add_assign(
loc,
Place::from(temp),
Rvalue::Use(Operand::Move(deref_place)),
);
place_local = temp;
last_len = p_ref.projection.len();
// We are creating a place by using our temp value's location
// and copying derefed values which we need to create new statement.
let temp_place =
@ -50,11 +55,6 @@ pub fn deref_finder<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
// Since our job with the temp is done it should be gone
let loc = Location { block: block, statement_index: i + 1 };
patch.add_statement(loc, StatementKind::StorageDead(temp));
// As all projections are off the base projection, if there are
// multiple derefs in the middle of projection, it might cause
// unsoundness, to not let that happen we break the loop.
break;
}
}
}

12
compiler/rustc_typeck/src/astconv/mod.rs
View File

@ -2460,8 +2460,16 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
self.normalize_ty(ast_ty.span, array_ty)
}
hir::TyKind::Typeof(ref e) => {
tcx.sess.emit_err(TypeofReservedKeywordUsed { span: ast_ty.span });
tcx.type_of(tcx.hir().local_def_id(e.hir_id))
let ty = tcx.type_of(tcx.hir().local_def_id(e.hir_id));
let span = ast_ty.span;
tcx.sess.emit_err(TypeofReservedKeywordUsed {
span,
ty,
opt_sugg: Some((span, Applicability::MachineApplicable))
.filter(|_| ty.is_suggestable()),
});
ty
}
hir::TyKind::Infer => {
// Infer also appears as the type of arguments or return

7
compiler/rustc_typeck/src/errors.rs
View File

@ -1,5 +1,7 @@
//! Errors emitted by typeck.
use rustc_errors::Applicability;
use rustc_macros::SessionDiagnostic;
use rustc_middle::ty::Ty;
use rustc_span::{symbol::Ident, Span, Symbol};
#[derive(SessionDiagnostic)]
@ -127,10 +129,13 @@ pub struct FunctionalRecordUpdateOnNonStruct {
#[derive(SessionDiagnostic)]
#[error(code = "E0516", slug = "typeck-typeof-reserved-keyword-used")]
pub struct TypeofReservedKeywordUsed {
pub struct TypeofReservedKeywordUsed<'tcx> {
pub ty: Ty<'tcx>,
#[primary_span]
#[label]
pub span: Span,
#[suggestion_verbose(message = "suggestion", code = "{ty}")]
pub opt_sugg: Option<(Span, Applicability)>,
}
#[derive(SessionDiagnostic)]

139
library/core/src/char/convert.rs
View File

@ -6,52 +6,10 @@ use crate::fmt;
use crate::mem::transmute;
use crate::str::FromStr;
/// Converts a `u32` to a `char`.
///
/// Note that all [`char`]s are valid [`u32`]s, and can be cast to one with
/// `as`:
///
/// ```
/// let c = '💯';
/// let i = c as u32;
///
/// assert_eq!(128175, i);
/// ```
///
/// However, the reverse is not true: not all valid [`u32`]s are valid
/// [`char`]s. `from_u32()` will return `None` if the input is not a valid value
/// for a [`char`].
///
/// For an unsafe version of this function which ignores these checks, see
/// [`from_u32_unchecked`].
///
/// # Examples
///
/// Basic usage:
///
/// ```
/// use std::char;
///
/// let c = char::from_u32(0x2764);
///
/// assert_eq!(Some('❤'), c);
/// ```
///
/// Returning `None` when the input is not a valid [`char`]:
///
/// ```
/// use std::char;
///
/// let c = char::from_u32(0x110000);
///
/// assert_eq!(None, c);
/// ```
#[doc(alias = "chr")]
/// Converts a `u32` to a `char`. See [`char::from_u32`].
#[must_use]
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_const_unstable(feature = "const_char_convert", issue = "89259")]
pub const fn from_u32(i: u32) -> Option<char> {
pub(super) const fn from_u32(i: u32) -> Option<char> {
// FIXME: once Result::ok is const fn, use it here
match char_try_from_u32(i) {
Ok(c) => Some(c),
@ -59,44 +17,11 @@ pub const fn from_u32(i: u32) -> Option<char> {
}
}
/// Converts a `u32` to a `char`, ignoring validity.
///
/// Note that all [`char`]s are valid [`u32`]s, and can be cast to one with
/// `as`:
///
/// ```
/// let c = '💯';
/// let i = c as u32;
///
/// assert_eq!(128175, i);
/// ```
///
/// However, the reverse is not true: not all valid [`u32`]s are valid
/// [`char`]s. `from_u32_unchecked()` will ignore this, and blindly cast to
/// [`char`], possibly creating an invalid one.
///
/// # Safety
///
/// This function is unsafe, as it may construct invalid `char` values.
///
/// For a safe version of this function, see the [`from_u32`] function.
///
/// # Examples
///
/// Basic usage:
///
/// ```
/// use std::char;
///
/// let c = unsafe { char::from_u32_unchecked(0x2764) };
///
/// assert_eq!('❤', c);
/// ```
/// Converts a `u32` to a `char`, ignoring validity. See [`char::from_u32_unchecked`].
#[rustc_const_unstable(feature = "const_char_convert", issue = "89259")]
#[inline]
#[must_use]
#[stable(feature = "char_from_unchecked", since = "1.5.0")]
#[rustc_const_unstable(feature = "const_char_convert", issue = "89259")]
pub const unsafe fn from_u32_unchecked(i: u32) -> char {
pub(super) const unsafe fn from_u32_unchecked(i: u32) -> char {
// SAFETY: the caller must guarantee that `i` is a valid char value.
if cfg!(debug_assertions) { char::from_u32(i).unwrap() } else { unsafe { transmute(i) } }
}
@ -317,60 +242,10 @@ impl fmt::Display for CharTryFromError {
}
}
/// Converts a digit in the given radix to a `char`.
///
/// A 'radix' here is sometimes also called a 'base'. A radix of two
/// indicates a binary number, a radix of ten, decimal, and a radix of
/// sixteen, hexadecimal, to give some common values. Arbitrary
/// radices are supported.
///
/// `from_digit()` will return `None` if the input is not a digit in
/// the given radix.
///
/// # Panics
///
/// Panics if given a radix larger than 36.
///
/// # Examples
///
/// Basic usage:
///
/// ```
/// use std::char;
///
/// let c = char::from_digit(4, 10);
///
/// assert_eq!(Some('4'), c);
///
/// // Decimal 11 is a single digit in base 16
/// let c = char::from_digit(11, 16);
///
/// assert_eq!(Some('b'), c);
/// ```
///
/// Returning `None` when the input is not a digit:
///
/// ```
/// use std::char;
///
/// let c = char::from_digit(20, 10);
///
/// assert_eq!(None, c);
/// ```
///
/// Passing a large radix, causing a panic:
///
/// ```should_panic
/// use std::char;
///
/// // this panics
/// let c = char::from_digit(1, 37);
/// ```
/// Converts a digit in the given radix to a `char`. See [`char::from_digit`].
#[inline]
#[must_use]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_const_unstable(feature = "const_char_convert", issue = "89259")]
pub const fn from_digit(num: u32, radix: u32) -> Option<char> {
pub(super) const fn from_digit(num: u32, radix: u32) -> Option<char> {
if radix > 36 {
panic!("from_digit: radix is too high (maximum 36)");
}

49
library/core/src/char/decode.rs
View File

@ -30,54 +30,9 @@ pub struct DecodeUtf16Error {
}
/// Creates an iterator over the UTF-16 encoded code points in `iter`,
/// returning unpaired surrogates as `Err`s.
///
/// # Examples
///
/// Basic usage:
///
/// ```
/// use std::char::decode_utf16;
///
/// // 𝄞mus<invalid>ic<invalid>
/// let v = [
/// 0xD834, 0xDD1E, 0x006d, 0x0075, 0x0073, 0xDD1E, 0x0069, 0x0063, 0xD834,
/// ];
///
/// assert_eq!(
/// decode_utf16(v.iter().cloned())
/// .map(|r| r.map_err(|e| e.unpaired_surrogate()))
/// .collect::<Vec<_>>(),
/// vec![
/// Ok('𝄞'),
/// Ok('m'), Ok('u'), Ok('s'),
/// Err(0xDD1E),
/// Ok('i'), Ok('c'),
/// Err(0xD834)
/// ]
/// );
/// ```
///
/// A lossy decoder can be obtained by replacing `Err` results with the replacement character:
///
/// ```
/// use std::char::{decode_utf16, REPLACEMENT_CHARACTER};
///
/// // 𝄞mus<invalid>ic<invalid>
/// let v = [
/// 0xD834, 0xDD1E, 0x006d, 0x0075, 0x0073, 0xDD1E, 0x0069, 0x0063, 0xD834,
/// ];
///
/// assert_eq!(
/// decode_utf16(v.iter().cloned())
/// .map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))
/// .collect::<String>(),
/// "𝄞mus<75>ic<69>"
/// );
/// ```
#[stable(feature = "decode_utf16", since = "1.9.0")]
/// returning unpaired surrogates as `Err`s. See [`char::decode_utf16`].
#[inline]
pub fn decode_utf16<I: IntoIterator<Item = u16>>(iter: I) -> DecodeUtf16<I::IntoIter> {
pub(super) fn decode_utf16<I: IntoIterator<Item = u16>>(iter: I) -> DecodeUtf16<I::IntoIter> {
DecodeUtf16 { iter: iter.into_iter(), buf: None }
}

69
library/core/src/char/mod.rs
View File

@ -23,18 +23,12 @@ mod decode;
mod methods;
// stable re-exports
#[stable(feature = "char_from_unchecked", since = "1.5.0")]
pub use self::convert::from_u32_unchecked;
#[stable(feature = "try_from", since = "1.34.0")]
pub use self::convert::CharTryFromError;
#[stable(feature = "char_from_str", since = "1.20.0")]
pub use self::convert::ParseCharError;
#[stable(feature = "rust1", since = "1.0.0")]
pub use self::convert::{from_digit, from_u32};
#[stable(feature = "decode_utf16", since = "1.9.0")]
pub use self::decode::{decode_utf16, DecodeUtf16, DecodeUtf16Error};
#[stable(feature = "unicode_version", since = "1.45.0")]
pub use crate::unicode::UNICODE_VERSION;
pub use self::decode::{DecodeUtf16, DecodeUtf16Error};
// perma-unstable re-exports
#[unstable(feature = "char_internals", reason = "exposed only for libstd", issue = "none")]
@ -89,30 +83,57 @@ const MAX_THREE_B: u32 = 0x10000;
Cn Unassigned a reserved unassigned code point or a noncharacter
*/
/// The highest valid code point a `char` can have, `'\u{10FFFF}'`.
///
/// # Examples
///
/// ```
/// # fn something_which_returns_char() -> char { 'a' }
/// let c: char = something_which_returns_char();
/// assert!(c <= char::MAX);
///
/// let value_at_max = char::MAX as u32;
/// assert_eq!(char::from_u32(value_at_max), Some('\u{10FFFF}'));
/// assert_eq!(char::from_u32(value_at_max + 1), None);
/// ```
/// The highest valid code point a `char` can have, `'\u{10FFFF}'`. Use [`char::MAX`] instead.
#[stable(feature = "rust1", since = "1.0.0")]
pub const MAX: char = char::MAX;
/// `U+FFFD REPLACEMENT CHARACTER` (<28>) is used in Unicode to represent a
/// decoding error.
///
/// It can occur, for example, when giving ill-formed UTF-8 bytes to
/// [`String::from_utf8_lossy`](../../std/string/struct.String.html#method.from_utf8_lossy).
/// decoding error. Use [`char::REPLACEMENT_CHARACTER`] instead.
#[stable(feature = "decode_utf16", since = "1.9.0")]
pub const REPLACEMENT_CHARACTER: char = char::REPLACEMENT_CHARACTER;
/// The version of [Unicode](https://www.unicode.org/) that the Unicode parts of
/// `char` and `str` methods are based on. Use [`char::UNICODE_VERSION`] instead.
#[stable(feature = "unicode_version", since = "1.45.0")]
pub const UNICODE_VERSION: (u8, u8, u8) = char::UNICODE_VERSION;
/// Creates an iterator over the UTF-16 encoded code points in `iter`, returning
/// unpaired surrogates as `Err`s. Use [`char::decode_utf16`] instead.
#[stable(feature = "decode_utf16", since = "1.9.0")]
#[inline]
pub fn decode_utf16<I: IntoIterator<Item = u16>>(iter: I) -> DecodeUtf16<I::IntoIter> {
self::decode::decode_utf16(iter)
}
/// Converts a `u32` to a `char`. Use [`char::from_u32`] instead.
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_const_unstable(feature = "const_char_convert", issue = "89259")]
#[must_use]
#[inline]
pub const fn from_u32(i: u32) -> Option<char> {
self::convert::from_u32(i)
}
/// Converts a `u32` to a `char`, ignoring validity. Use [`char::from_u32_unchecked`].
/// instead.
#[stable(feature = "char_from_unchecked", since = "1.5.0")]
#[rustc_const_unstable(feature = "const_char_convert", issue = "89259")]
#[must_use]
#[inline]
pub const unsafe fn from_u32_unchecked(i: u32) -> char {
// SAFETY: the safety contract must be upheld by the caller.
unsafe { self::convert::from_u32_unchecked(i) }
}
/// Converts a digit in the given radix to a `char`. Use [`char::from_digit`] instead.
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_const_unstable(feature = "const_char_convert", issue = "89259")]
#[must_use]
#[inline]
pub const fn from_digit(num: u32, radix: u32) -> Option<char> {
self::convert::from_digit(num, radix)
}
/// Returns an iterator that yields the hexadecimal Unicode escape of a
/// character, as `char`s.
///

15
src/bootstrap/bootstrap.py
View File

@ -1097,8 +1097,19 @@ class RustBuild(object):
def update_submodules(self):
"""Update submodules"""
if (not os.path.exists(os.path.join(self.rust_root, ".git"))) or \
self.get_toml('submodules') == "false":
has_git = os.path.exists(os.path.join(self.rust_root, ".git"))
# This just arbitrarily checks for cargo, but any workspace member in
# a submodule would work.
has_submodules = os.path.exists(os.path.join(self.rust_root, "src/tools/cargo/Cargo.toml"))
if not has_git and not has_submodules:
print("This is not a git repository, and the requisite git submodules were not found.")
print("If you downloaded the source from https://github.com/rust-lang/rust/releases,")
print("those sources will not work. Instead, consider downloading from the source")
print("releases linked at")
print("https://forge.rust-lang.org/infra/other-installation-methods.html#source-code")
print("or clone the repository at https://github.com/rust-lang/rust/.")
raise SystemExit(1)
if not has_git or self.get_toml('submodules') == "false":
return
default_encoding = sys.getdefaultencoding()

12
src/librustdoc/html/markdown.rs
View File

@ -251,7 +251,7 @@ impl<'a, I: Iterator<Item = Event<'a>>> Iterator for CodeBlocks<'_, 'a, I> {
}
}
let lines = origtext.lines().filter_map(|l| map_line(l).for_html());
let text = lines.collect::<Vec<Cow<'_, str>>>().join("\n");
let text = lines.intersperse("\n".into()).collect::<String>();
let parse_result = match kind {
CodeBlockKind::Fenced(ref lang) => {
@ -291,15 +291,13 @@ impl<'a, I: Iterator<Item = Event<'a>>> Iterator for CodeBlocks<'_, 'a, I> {
let test = origtext
.lines()
.map(|l| map_line(l).for_code())
.collect::<Vec<Cow<'_, str>>>()
.join("\n");
.intersperse("\n".into())
.collect::<String>();
let krate = krate.as_ref().map(|s| &**s);
let (test, _, _) =
doctest::make_test(&test, krate, false, &Default::default(), edition, None);
let channel = if test.contains("#![feature(") { "&amp;version=nightly" } else { "" };
let edition_string = format!("&amp;edition={}", edition);
// These characters don't need to be escaped in a URI.
// FIXME: use a library function for percent encoding.
fn dont_escape(c: u8) -> bool {
@ -325,8 +323,8 @@ impl<'a, I: Iterator<Item = Event<'a>>> Iterator for CodeBlocks<'_, 'a, I> {
}
}
Some(format!(
r#"<a class="test-arrow" target="_blank" href="{}?code={}{}{}">Run</a>"#,
url, test_escaped, channel, edition_string
r#"<a class="test-arrow" target="_blank" href="{}?code={}{}&amp;edition={}">Run</a>"#,
url, test_escaped, channel, edition,
))
});

100
src/test/mir-opt/derefer_test_multiple.main.Derefer.diff Normal file
View File

@ -0,0 +1,100 @@
- // MIR for `main` before Derefer
+ // MIR for `main` after Derefer
fn main() -> () {
let mut _0: (); // return place in scope 0 at $DIR/derefer_test_multiple.rs:2:12: 2:12
let mut _1: (i32, i32); // in scope 0 at $DIR/derefer_test_multiple.rs:3:9: 3:14
let mut _3: &mut (i32, i32); // in scope 0 at $DIR/derefer_test_multiple.rs:4:22: 4:28
let mut _5: &mut (i32, &mut (i32, i32)); // in scope 0 at $DIR/derefer_test_multiple.rs:5:22: 5:28
let mut _7: &mut (i32, &mut (i32, &mut (i32, i32))); // in scope 0 at $DIR/derefer_test_multiple.rs:6:22: 6:28
+ let mut _10: &mut (i32, &mut (i32, &mut (i32, i32))); // in scope 0 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ let mut _11: &mut (i32, &mut (i32, i32)); // in scope 0 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ let mut _12: &mut (i32, i32); // in scope 0 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ let mut _13: &mut (i32, &mut (i32, &mut (i32, i32))); // in scope 0 at $DIR/derefer_test_multiple.rs:8:13: 8:30
+ let mut _14: &mut (i32, &mut (i32, i32)); // in scope 0 at $DIR/derefer_test_multiple.rs:8:13: 8:30
+ let mut _15: &mut (i32, i32); // in scope 0 at $DIR/derefer_test_multiple.rs:8:13: 8:30
scope 1 {
debug a => _1; // in scope 1 at $DIR/derefer_test_multiple.rs:3:9: 3:14
let mut _2: (i32, &mut (i32, i32)); // in scope 1 at $DIR/derefer_test_multiple.rs:4:9: 4:14
scope 2 {
debug b => _2; // in scope 2 at $DIR/derefer_test_multiple.rs:4:9: 4:14
let mut _4: (i32, &mut (i32, &mut (i32, i32))); // in scope 2 at $DIR/derefer_test_multiple.rs:5:9: 5:14
scope 3 {
debug c => _4; // in scope 3 at $DIR/derefer_test_multiple.rs:5:9: 5:14
let mut _6: (i32, &mut (i32, &mut (i32, &mut (i32, i32)))); // in scope 3 at $DIR/derefer_test_multiple.rs:6:9: 6:14
scope 4 {
debug d => _6; // in scope 4 at $DIR/derefer_test_multiple.rs:6:9: 6:14
let _8: &mut i32; // in scope 4 at $DIR/derefer_test_multiple.rs:7:9: 7:10
scope 5 {
debug x => _8; // in scope 5 at $DIR/derefer_test_multiple.rs:7:9: 7:10
let _9: &mut i32; // in scope 5 at $DIR/derefer_test_multiple.rs:8:9: 8:10
scope 6 {
debug y => _9; // in scope 6 at $DIR/derefer_test_multiple.rs:8:9: 8:10
}
}
}
}
}
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/derefer_test_multiple.rs:3:9: 3:14
(_1.0: i32) = const 42_i32; // scope 0 at $DIR/derefer_test_multiple.rs:3:17: 3:25
(_1.1: i32) = const 43_i32; // scope 0 at $DIR/derefer_test_multiple.rs:3:17: 3:25
StorageLive(_2); // scope 1 at $DIR/derefer_test_multiple.rs:4:9: 4:14
StorageLive(_3); // scope 1 at $DIR/derefer_test_multiple.rs:4:22: 4:28
_3 = &mut _1; // scope 1 at $DIR/derefer_test_multiple.rs:4:22: 4:28
(_2.0: i32) = const 99_i32; // scope 1 at $DIR/derefer_test_multiple.rs:4:17: 4:29
(_2.1: &mut (i32, i32)) = move _3; // scope 1 at $DIR/derefer_test_multiple.rs:4:17: 4:29
StorageDead(_3); // scope 1 at $DIR/derefer_test_multiple.rs:4:28: 4:29
StorageLive(_4); // scope 2 at $DIR/derefer_test_multiple.rs:5:9: 5:14
StorageLive(_5); // scope 2 at $DIR/derefer_test_multiple.rs:5:22: 5:28
_5 = &mut _2; // scope 2 at $DIR/derefer_test_multiple.rs:5:22: 5:28
(_4.0: i32) = const 11_i32; // scope 2 at $DIR/derefer_test_multiple.rs:5:17: 5:29
(_4.1: &mut (i32, &mut (i32, i32))) = move _5; // scope 2 at $DIR/derefer_test_multiple.rs:5:17: 5:29
StorageDead(_5); // scope 2 at $DIR/derefer_test_multiple.rs:5:28: 5:29
StorageLive(_6); // scope 3 at $DIR/derefer_test_multiple.rs:6:9: 6:14
StorageLive(_7); // scope 3 at $DIR/derefer_test_multiple.rs:6:22: 6:28
_7 = &mut _4; // scope 3 at $DIR/derefer_test_multiple.rs:6:22: 6:28
(_6.0: i32) = const 13_i32; // scope 3 at $DIR/derefer_test_multiple.rs:6:17: 6:29
(_6.1: &mut (i32, &mut (i32, &mut (i32, i32)))) = move _7; // scope 3 at $DIR/derefer_test_multiple.rs:6:17: 6:29
StorageDead(_7); // scope 3 at $DIR/derefer_test_multiple.rs:6:28: 6:29
StorageLive(_8); // scope 4 at $DIR/derefer_test_multiple.rs:7:9: 7:10
- _8 = &mut ((*((*((*(_6.1: &mut (i32, &mut (i32, &mut (i32, i32))))).1: &mut (i32, &mut (i32, i32)))).1: &mut (i32, i32))).1: i32); // scope 4 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ StorageLive(_10); // scope 4 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ _10 = move (_6.1: &mut (i32, &mut (i32, &mut (i32, i32)))); // scope 4 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ StorageLive(_11); // scope 4 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ _11 = move ((*_10).1: &mut (i32, &mut (i32, i32))); // scope 4 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ StorageLive(_12); // scope 4 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ _12 = move ((*_11).1: &mut (i32, i32)); // scope 4 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ _8 = &mut ((*_12).1: i32); // scope 4 at $DIR/derefer_test_multiple.rs:7:13: 7:30
+ StorageDead(_10); // scope 5 at $DIR/derefer_test_multiple.rs:8:9: 8:10
+ StorageDead(_11); // scope 5 at $DIR/derefer_test_multiple.rs:8:9: 8:10
+ StorageDead(_12); // scope 5 at $DIR/derefer_test_multiple.rs:8:9: 8:10
StorageLive(_9); // scope 5 at $DIR/derefer_test_multiple.rs:8:9: 8:10
- _9 = &mut ((*((*((*(_6.1: &mut (i32, &mut (i32, &mut (i32, i32))))).1: &mut (i32, &mut (i32, i32)))).1: &mut (i32, i32))).1: i32); // scope 5 at $DIR/derefer_test_multiple.rs:8:13: 8:30
+ StorageLive(_13); // scope 5 at $DIR/derefer_test_multiple.rs:8:13: 8:30
+ _13 = move (_6.1: &mut (i32, &mut (i32, &mut (i32, i32)))); // scope 5 at $DIR/derefer_test_multiple.rs:8:13: 8:30
+ StorageLive(_14); // scope 5 at $DIR/derefer_test_multiple.rs:8:13: 8:30
+ _14 = move ((*_13).1: &mut (i32, &mut (i32, i32))); // scope 5 at $DIR/derefer_test_multiple.rs:8:13: 8:30
+ StorageLive(_15); // scope 5 at $DIR/derefer_test_multiple.rs:8:13: 8:30
+ _15 = move ((*_14).1: &mut (i32, i32)); // scope 5 at $DIR/derefer_test_multiple.rs:8:13: 8:30
+ _9 = &mut ((*_15).1: i32); // scope 5 at $DIR/derefer_test_multiple.rs:8:13: 8:30
+ StorageDead(_13); // scope 0 at $DIR/derefer_test_multiple.rs:2:12: 9:2
+ StorageDead(_14); // scope 0 at $DIR/derefer_test_multiple.rs:2:12: 9:2
+ StorageDead(_15); // scope 0 at $DIR/derefer_test_multiple.rs:2:12: 9:2
_0 = const (); // scope 0 at $DIR/derefer_test_multiple.rs:2:12: 9:2
StorageDead(_9); // scope 5 at $DIR/derefer_test_multiple.rs:9:1: 9:2
StorageDead(_8); // scope 4 at $DIR/derefer_test_multiple.rs:9:1: 9:2
StorageDead(_6); // scope 3 at $DIR/derefer_test_multiple.rs:9:1: 9:2
StorageDead(_4); // scope 2 at $DIR/derefer_test_multiple.rs:9:1: 9:2
StorageDead(_2); // scope 1 at $DIR/derefer_test_multiple.rs:9:1: 9:2
StorageDead(_1); // scope 0 at $DIR/derefer_test_multiple.rs:9:1: 9:2
return; // scope 0 at $DIR/derefer_test_multiple.rs:9:2: 9:2
+ }
+
+ bb1 (cleanup): {
+ resume; // scope 0 at $DIR/derefer_test_multiple.rs:2:1: 9:2
}
}

9
src/test/mir-opt/derefer_test_multiple.rs Normal file
View File

@ -0,0 +1,9 @@
// EMIT_MIR derefer_test_multiple.main.Derefer.diff
fn main () {
let mut a = (42, 43);
let mut b = (99, &mut a);
let mut c = (11, &mut b);
let mut d = (13, &mut c);
let x = &mut (*d.1).1.1.1;
let y = &mut (*d.1).1.1.1;
}

4
src/test/ui/borrowck/suggest-local-var-for-vector.rs Normal file
View File

@ -0,0 +1,4 @@
fn main() {
let mut vec = vec![0u32; 420];
vec[vec.len() - 1] = 123; //~ ERROR cannot borrow `vec` as immutable because it is also borrowed as mutable
}

24
src/test/ui/borrowck/suggest-local-var-for-vector.stderr Normal file
View File

@ -0,0 +1,24 @@
error[E0502]: cannot borrow `vec` as immutable because it is also borrowed as mutable
--> $DIR/suggest-local-var-for-vector.rs:3:9
|
LL | vec[vec.len() - 1] = 123;
| ----^^^^^^^^^-----
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
| mutable borrow later used here
|
help: try adding a local storing this...
--> $DIR/suggest-local-var-for-vector.rs:3:9
|
LL | vec[vec.len() - 1] = 123;
| ^^^^^^^^^
help: ...and then using that local here
--> $DIR/suggest-local-var-for-vector.rs:3:5
|
LL | vec[vec.len() - 1] = 123;
| ^^^^^^^^^^^^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0502`.

4
src/test/ui/borrowck/suggest-storing-local-var-for-vector.rs Normal file
View File

@ -0,0 +1,4 @@
fn main() {
let mut vec = vec![0u32; 420];
vec[vec.len() - 1] = 123; //~ ERROR cannot borrow `vec` as immutable because it is also borrowed as mutable
}

24
src/test/ui/borrowck/suggest-storing-local-var-for-vector.stderr Normal file
View File

@ -0,0 +1,24 @@
error[E0502]: cannot borrow `vec` as immutable because it is also borrowed as mutable
--> $DIR/suggest-storing-local-var-for-vector.rs:3:9
|
LL | vec[vec.len() - 1] = 123;
| ----^^^^^^^^^-----
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
| mutable borrow later used here
|
help: try adding a local storing this...
--> $DIR/suggest-storing-local-var-for-vector.rs:3:9
|
LL | vec[vec.len() - 1] = 123;
| ^^^^^^^^^
help: ...and then using that local here
--> $DIR/suggest-storing-local-var-for-vector.rs:3:5
|
LL | vec[vec.len() - 1] = 123;
| ^^^^^^^^^^^^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0502`.

22
src/test/ui/borrowck/two-phase-nonrecv-autoref.nll.stderr
View File

@ -54,6 +54,17 @@ LL | i[i[3]] = 4;
| | immutable borrow occurs here
| mutable borrow occurs here
| mutable borrow later used here
|
help: try adding a local storing this...
--> $DIR/two-phase-nonrecv-autoref.rs:138:7
|
LL | i[i[3]] = 4;
| ^^^^
help: ...and then using that local here
--> $DIR/two-phase-nonrecv-autoref.rs:138:5
|
LL | i[i[3]] = 4;
| ^^^^^^^
error[E0502]: cannot borrow `i` as immutable because it is also borrowed as mutable
--> $DIR/two-phase-nonrecv-autoref.rs:143:7
@ -64,6 +75,17 @@ LL | i[i[3]] = i[4];
| | immutable borrow occurs here
| mutable borrow occurs here
| mutable borrow later used here
|
help: try adding a local storing this...
--> $DIR/two-phase-nonrecv-autoref.rs:143:7
|
LL | i[i[3]] = i[4];
| ^^^^
help: ...and then using that local here
--> $DIR/two-phase-nonrecv-autoref.rs:143:5
|
LL | i[i[3]] = i[4];
| ^^^^^^^
error: aborting due to 7 previous errors

5
src/test/ui/error-codes/E0516.stderr
View File

@ -3,6 +3,11 @@ error[E0516]: `typeof` is a reserved keyword but unimplemented
|
LL | let x: typeof(92) = 92;
| ^^^^^^^^^^ reserved keyword
|
help: consider replacing `typeof(...)` with an actual type
|
LL | let x: i32 = 92;
| ~~~
error: aborting due to previous error

5
src/test/ui/issues/issue-29184.stderr
View File

@ -3,6 +3,11 @@ error[E0516]: `typeof` is a reserved keyword but unimplemented
|
LL | let x: typeof(92) = 92;
| ^^^^^^^^^^ reserved keyword
|
help: consider replacing `typeof(...)` with an actual type
|
LL | let x: i32 = 92;
| ~~~
error: aborting due to previous error

5
src/test/ui/typeof/type_mismatch.stderr
View File

@ -3,6 +3,11 @@ error[E0516]: `typeof` is a reserved keyword but unimplemented
|
LL | let b: typeof(a) = 1i8;
| ^^^^^^^^^ reserved keyword
|
help: consider replacing `typeof(...)` with an actual type
|
LL | let b: u8 = 1i8;
| ~~
error[E0308]: mismatched types
--> $DIR/type_mismatch.rs:5:24