This changes the `ToTokens` implementations for expressions, statements,
etc. with almost-trivial ones that produce `Interpolated(*Nt(...))`
pseudo-tokens. In this way, quasiquote now works the same way as macros
do: already-parsed AST fragments are used as-is, not reparsed.
The `ToSource` trait is removed. Quasiquote no longer involves
pretty-printing at all, which removes the need for the
`encode_with_hygiene` hack. All associated machinery is removed.
A new `Nonterminal` is added, NtArm, which the parser now interpolates.
This is just for quasiquote, not macros (although it could be in the
future).
`ToTokens` is no longer implemented for `Arg` (although this could be
added again) and `Generics` (which I don't think makes sense).
This breaks any compiler extensions that relied on the ability of
`ToTokens` to turn AST fragments back into inspectable token trees. For
this reason, this closes#16987.
As such, this is a [breaking-change].
Fixes#16472.
Fixes#15962.
Fixes#17397.
Fixes#16617.
As part of the audit for #22820 the following duplicate feature
gate tests were removed:
* `box_patterns`
* `simd_ffi`
These tests for `box_patterns` and `simd_ffi` were added in #23578,
however there were existing tests in #20723 and #21233 respectively.
r? @nrc
As part of the audit for #22820 the following feature gate tests have been
added:
* `negate_unsigned`
* `on_unimplemented`
* `optin_builtin_traits`
* `plugin`
* `rustc_attrs`
* `rustc_diagnostic_macros`
* `slice_patterns`
In addition some feature gate error message typos fixed.
Rather than storing the relations between free-regions in a global
table, introduce a `FreeRegionMap` data structure. regionck computes the
`FreeRegionMap` for each fn and stores the result into the tcx so that
borrowck can use it (this could perhaps be refactored to have borrowck
recompute the map, but it's a bid tedious to recompute due to the
interaction of closures and free fns). The main reason to do this is
because of #22779 -- using a global table was incorrect because when
validating impl method signatures, we want to use the free region
relationships from the *trait*, not the impl.
Fixes#22779.
Changes the style guidelines regarding unit tests to recommend using a
sub-module named "tests" instead of "test" for unit tests as "test"
might clash with imports of libtest.
As part of the audit for #22820 the following duplicate feature
gate tests were removed:
* `box_patterns`
* `simd_ffi`
These tests for `box_patterns` and `simd_ffi` were added in #23578,
however there were existing tests in #20723 and #21233 respectively.
As part of the audit for #22820 the following feature gate tests have
been added:
* `negate_unsigned`
* `on_unimplemented`
* `optin_builtin_traits`
* `plugin`
* `rustc_attrs`
* `slice_patterns`
This required fixing the `pretty-rpass-full` tests to have the same `$$(CSREQ$(1)_T_$(2)_H_$(3))` dependencies as the `rpass-full` and `cfail-full` tests. It also required fixing the `run-make/simd-ffi` test to use unique names for its output files.
The problem is that rustdoc searches for external crates using the host
triple, not the target triple. It's actually unclear to me whether this is
correct behavior or not, but it is necessary to get cross-compiled tests
working.
These tests fail, in general, for cross-compilation, because they require
the rustc crates to exist for the target, and they don't. We can't compile
them for the target unless we also compile LLVM for the target (we don't).
Android is a subset of cross-compilation.
The other fulldeps tests, on the other hand, work fine for
cross-compilation, and in fact, are verifying that rustc correctly searches
for a host plugin crate, not a target plugin crate.
This PR uses the inline error suggestions introduced in #24242 to modify a few existing `help` messages. The new errors look like this:
foobar.rs:5:12: 5:25 error: expected a path on the left-hand side of `+`,
not `&'static Copy` [E0178]
foobar.rs:5 let x: &'static Copy + 'static;
^~~~~~~~~~~~~
foobar.rs:5:12: 5:35 help: try adding parentheses (per RFC 438):
foobar.rs: let x: &'static (Copy + 'static);
foobar.rs:2:13: 2:23 error: cast to unsized type: `&_` as `core::marker::Copy`
foobar.rs:2 let x = &1 as Copy;
^~~~~~~~~~
foobar.rs:2:19: 2:23 help: try casting to a reference instead:
foobar.rs: let x = &1 as &Copy;
foobar.rs:7:24: 7:25 error: expected expression, found `;`
foobar.rs:7 let x = box (1 + 1);
^
foobar.rs:7:13: 7:16 help: try using `box()` instead:
foobar.rs: let x = box() (1 + 1);
This also modifies compiletest to give the ability to directly test suggestions given by error messages.
This is an implementation of [RFC 1030][rfc] which adds these traits to the
prelude and additionally removes all inherent `into_iter` methods on collections
in favor of the trait implementation (which is now accessible by default).
[rfc]: https://github.com/rust-lang/rfcs/pull/1030
This is technically a breaking change due to the prelude additions and removal
of inherent methods, but it is expected that essentially no code breaks in
practice.
[breaking-change]
Closes#24538
For now, words() is left in (but deprecated), and Words is a type alias for
struct SplitWhitespace.
Also cleaned up references to str.words() throughout codebase.
Closes#15628
When linking an archive statically to an rlib, the compiler will extract all
contents of the archive and add them all to the rlib being generated. The
current method of extraction is to run `ar x`, dumping all files into a
temporary directory. Object archives, however, are allowed to have multiple
entries with the same file name, so there is no method for them to extract their
contents into a directory in a lossless fashion.
This commit adds iterator support to the `ArchiveRO` structure which hooks into
LLVM's support for reading object archives. This iterator is then used to
inspect each object in turn and extract it to a unique location for later
assembly.
Check for duplicate loop labels in function bodies.
See also: http://internals.rust-lang.org/t/psa-rejecting-duplicate-loop-labels/1833
The change, which we are putting in as future-proofing in preparation for future potential additions to the language (namely labeling arbitrary blocks and using those labels in borrow expressions), means that code like this will start emitting warnings:
```rust
fn main() {
{ 'a: loop { break; } }
{ 'a: loop { break; } }
}
```
To make the above code compile without warnings, write this instead:
```rust
fn main() {
{ 'a: loop { break; } }
{ 'b: loop { break; } }
}
```
Since this change is only introducing a new warnings, this change is non-breaking.
Fix#21633
For now, words() is left in (but deprecated), and Words is a type alias for
struct SplitWhitespace.
Also cleaned up references to s.words() throughout codebase.
Closes#15628
When linking an archive statically to an rlib, the compiler will extract all
contents of the archive and add them all to the rlib being generated. The
current method of extraction is to run `ar x`, dumping all files into a
temporary directory. Object archives, however, are allowed to have multiple
entries with the same file name, so there is no method for them to extract their
contents into a directory in a lossless fashion.
This commit adds iterator support to the `ArchiveRO` structure which hooks into
LLVM's support for reading object archives. This iterator is then used to
inspect each object in turn and extract it to a unique location for later
assembly.
