…n in the rustc book.

We relax the assumption that the discriminant is always field 0, in
preparations for layouts like generators where this is not going to be
the case.

This adds some extra docs for the `no-prefer-dynamic` header.

And also a `s/must_compile_successfully/compile_pass`.

`must_compile_successfully` has been renamed to `compile_pass` at some
point in the past and this comment was still referring to the old name.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

…ble compiler flags, instead of flags for debugging.

Fix lifetime on LocalInternedString::get function

cc @eddyb @nnethercote

…petrochenkov

Properly parse '--extern-private' with name and path

It turns out that rust-lang#57586 didn't properly parse `--extern-private name=path`.

This PR properly implements the `--extern-private` option. I've added a new `extern-private` option to `compiletest`, which causes an `--extern-private` option to be passed to the compiler with the proper path.

Part of rust-lang#44663

Move back::link and debuginfo::type_names to cg ssa

r? @eddyb

…rch, r=QuietMisdreavus

Ensure that exact matches come first in rustdoc search

Fixes rust-lang#59287.

cc @scottmcm

r? @QuietMisdreavus

 Add discr_index to multi-variant layouts

We remove the assumption that the discriminant is always field 0, in
preparations for layouts like generators where this is not (always) going to be
the case.

Specifically, upvars are going to go before the discriminant. In theory, it's possible to remove _that_ assumption instead and keep the discriminant at field index 0, but one assumption or the other had to go :)

There is one place I know of in the debuginfo code where we'll still need to remove assumptions that the discriminant is the _only_ field. I was planning on doing this along with the upcoming generator change, which will also include tests that exercise the code changing in this PR.

r? @eddyb
cc @oli-obk
cc @cramertj

Use a proc macro to declare preallocated symbols

r? @petrochenkov

…mertj

Document the -Z flag to the rustc book

# Description

Changes:
- Added new documentation on the `-Z` flag of rustc in the command-line arguments section of the rustc book.

If I need to rephrase anything or if you have any improvements, please let me know! I deliberately did not create an exhaustive list of all options since they are likely to change over time and per toolchain version.

closes rust-lang#41142

…-mut, r=pnkfelix

Mark variables captured by reference as mutable correctly

Closes rust-lang#59620

r? @pnkfelix

…ietMisdreavus

Add back the substring test

Fixes rust-lang#58331.

r? @QuietMisdreavus

Final (one can only hope) futures_api adjustments

Based on rust-lang#59119 -- this change is only the latter two commits.
cc rust-lang#59725

r? @withoutboats

compiletest: Improve no_prefer_dynamic docs

This adds some extra docs for the `no-prefer-dynamic` header.

And also a `s/must_compile_successfully/compile_pass`.

`must_compile_successfully` has been renamed to `compile_pass` at some
point in the past and this comment was still referring to the old name.

Kill dead code dominator code.

Hi,

Whilst fiddling around in the dominator code, I found some (I think) unused code. This code *was* used at the time it was imported, but over time it seems to have become redundant.

I've tested a build up to stage 1 with no problems. Maybe the tests will turn up something though.

P.S.

There is a FIXME comment in `dominators/mod.rs`:
```
    pub fn is_dominated_by(&self, node: Node, dom: Node) -> bool {
        // FIXME -- could be optimized by using post-order-rank
        self.dominators(node).any(|n| n == dom)
    }
```

I'm not sure of the intention of this comment. The `Dominators` struct already operates over post-order rank nodes. Any ideas?

…idtwco

improve unknown enum variant errors

Fixes rust-lang#56517.

Remove strange formatting in `Ordering` docs.

I can't really fathom what the intent of the brackets is. The [original PR](rust-lang#12956) doesn't give any hints. I think it seems fine without them.

std::ops::Div examples: correct nominator to numerator

SGX target: fix cfg(test) build