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Stabilize the copy_closures and clone_closures features
In addition to the `Fn*` family of traits, closures now implement `Copy` (and similarly `Clone`) if all of the captures do.
Tracking issue: https://github.com/rust-lang/rust/issues/44490
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Better diagnostics for '..' pattern fragment not in the last position
Fixes #49257.
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Stabilize termination_trait, split out termination_trait_test
For #48453.
First time contribution, so I'd really appreciate any feedback on how this PR can be better.
Not sure exactly what kind of documentation update is needed. If there is no PR to update the reference, I can try doing that this week as I have time.
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In addition to the `Fn*` family of traits, closures now implement `Copy` (and similarly `Clone`) if all of the captures do.
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This commit adds a new attribute to the Rust compiler specific to the wasm
target (and no other targets). The `#[wasm_import_module]` attribute is used to
specify the module that a name is imported from, and is used like so:
#[wasm_import_module = "./foo.js"]
extern {
fn some_js_function();
}
Here the import of the symbol `some_js_function` is tagged with the `./foo.js`
module in the wasm output file. Wasm-the-format includes two fields on all
imports, a module and a field. The field is the symbol name (`some_js_function`
above) and the module has historically unconditionally been `"env"`. I'm not
sure if this `"env"` convention has asm.js or LLVM roots, but regardless we'd
like the ability to configure it!
The proposed ES module integration with wasm (aka a wasm module is "just another
ES module") requires that the import module of wasm imports is interpreted as an
ES module import, meaning that you'll need to encode paths, NPM packages, etc.
As a result, we'll need this to be something other than `"env"`!
Unfortunately neither our version of LLVM nor LLD supports custom import modules
(aka anything not `"env"`). My hope is that by the time LLVM 7 is released both
will have support, but in the meantime this commit adds some primitive
encoding/decoding of wasm files to the compiler. This way rustc postprocesses
the wasm module that LLVM emits to ensure it's got all the imports we'd like to
have in it.
Eventually I'd ideally like to unconditionally require this attribute to be
placed on all `extern { ... }` blocks. For now though it seemed prudent to add
it as an unstable attribute, so for now it's not required (as that'd force usage
of a feature gate). Hopefully it doesn't take too long to "stabilize" this!
cc rust-lang-nursery/rust-wasm#29
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This commit is an implementation of adding custom sections to wasm artifacts in
rustc. The intention here is to expose the ability of the wasm binary format to
contain custom sections with arbitrary user-defined data. Currently neither our
version of LLVM nor LLD supports this so the implementation is currently custom
to rustc itself.
The implementation here is to attach a `#[wasm_custom_section = "foo"]`
attribute to any `const` which has a type like `[u8; N]`. Other types of
constants aren't supported yet but may be added one day! This should hopefully
be enough to get off the ground with *some* custom section support.
The current semantics are that any constant tagged with `#[wasm_custom_section]`
section will be *appended* to the corresponding section in the final output wasm
artifact (and this affects dependencies linked in as well, not just the final
crate). This means that whatever is interpreting the contents must be able to
interpret binary-concatenated sections (or each constant needs to be in its own
custom section).
To test this change the existing `run-make` test suite was moved to a
`run-make-fulldeps` folder and a new `run-make` test suite was added which
applies to all targets by default. This test suite currently only has one test
which only runs for the wasm target (using a node.js script to use `WebAssembly`
in JS to parse the wasm output).
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lambda-building
This prevents explicit `-> _` return type annotations for closures generated by `lambda`.
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address some FIXME whose associated issues were marked as closed
part of #44366
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This reverts commit e5a55e74405dedf8bc0744300a8c506eea94bc18.
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Rollup of 17 pull requests
- Successful merges: #46518, #48810, #48834, #48902, #49004, #49092, #49096, #49099, #49104, #49125, #49139, #49152, #49157, #49161, #49166, #49176, #49184
- Failed merges:
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Merge `feature(advanced_slice_patterns)` into `feature(slice_patterns)`
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improve error message of inner attribute syntax
Fixes #49040
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Replace many of the last references to readmes
In particular, this removes the dep track readme, so it should not be merged before https://github.com/rust-lang-nursery/rustc-guide/pull/92
Fix #47935
cc #48478
r? @nikomatsakis
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Suggest removing `&`s
This implements the error message discussed in #47744.
We check whether removing each `&` yields a type that satisfies the requested obligation.
Also, it was created a new `NodeId` field in `ObligationCause` in order to iterate through the `&`s. The way it's implemented now, it iterates through the obligation snippet and counts the number of `&`.
r? @estebank
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This stabilizes `main` with non-() return types; see #48453.
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- Using `span_take_while` to implement others.
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- `span_suggestion` changed to `span_suggestion_short`;
- `Span` used changed to contain only `&` refs;
- Tests passing.
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MVP for chalkification
r? @nikomatsakis
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syntax: Make imports in AST closer to the source and cleanup their parsing
This is a continuation of https://github.com/rust-lang/rust/pull/45846 in some sense.
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Fix spans of root segments
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Add the root segment for name resolution purposes only
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Fix `unused_import_braces` lint false positive on `use prefix::{self as rename}`
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