This commit changes `syntax::fold::Folder` from a functional style
(where most methods take a `T` and produce a new `T`) to a more
imperative style (where most methods take and modify a `&mut T`), and
renames it `syntax::mut_visit::MutVisitor`.
The first benefit is speed. The functional style does not require any
reallocations, due to the use of `P::map` and
`MoveMap::move_{,flat_}map`. However, every field in the AST must be
overwritten; even those fields that are unchanged are overwritten with
the same value. This causes a lot of unnecessary memory writes. The
imperative style reduces instruction counts by 1--3% across a wide range
of workloads, particularly incremental workloads.
The second benefit is conciseness; the imperative style is usually more
concise. E.g. compare the old functional style:
```
fn fold_abc(&mut self, abc: ABC) {
ABC {
a: fold_a(abc.a),
b: fold_b(abc.b),
c: abc.c,
}
}
```
with the imperative style:
```
fn visit_abc(&mut self, ABC { a, b, c: _ }: &mut ABC) {
visit_a(a);
visit_b(b);
}
```
(The reductions get larger in more complex examples.)
Overall, the patch removes over 200 lines of code -- even though the new
code has more comments -- and a lot of the remaining lines have fewer
characters.
Some notes:
- The old style used methods called `fold_*`. The new style mostly uses
methods called `visit_*`, but there are a few methods that map a `T`
to something other than a `T`, which are called `flat_map_*` (`T` maps
to multiple `T`s) or `filter_map_*` (`T` maps to 0 or 1 `T`s).
- `move_map.rs`/`MoveMap`/`move_map`/`move_flat_map` are renamed
`map_in_place.rs`/`MapInPlace`/`map_in_place`/`flat_map_in_place` to
reflect their slightly changed signatures.
- Although this commit renames the `fold` module as `mut_visit`, it
keeps it in the `fold.rs` file, so as not to confuse git. The next
commit will rename the file.
HirIdification: add key HirId methods
This is another PR in a series dedicated to `HirId`-ification, i.e. deprecating `ast::NodeId`s after the AST > HIR lowering process. The bigger proof of concept can be seen in #57578.
**Phase 2**: add key `HirId` methods mirroring the `NodeId` ones.
These should be counterparts of the most widely used `Hir` methods using `NodeId`s. Note that this expands `hir::map::Definitions` with an additional `hir_to_def_index` map (with the intention of later removing `node_to_def_index`).
As a bonus there is also a small cleanup commit removing unnecessary calls to `node_to_hir_id` where `HirId` is already available.
r? @Zoxc
Cc @varkor
Transition liballoc to Rust 2018
This transitions liballoc to Rust 2018 edition and applies relevant idiom lints.
I also did a small bit of drive-by cleanup along the way.
r? @oli-obk
I started with liballoc since it seemed easiest. In particular, adding `edition = "2018"` to libcore gave me way too many errors due to stdsimd. Ideally we should be able to continue this crate-by-crate until all crates use 2018.
submodule: update clippy from 6ce78d1 to 3bda548
6ce78d1...3bda548
Rustup: unused trim result
Auto merge of #3727 - phansch:rustup_unused_trim, r=matthiaskrgr …
Travis: Don't run integration tests on every PR commit …
Auto merge of #3726 - phansch:some_renaming, r=oli-obk …
Fix ICE in vec_box lint and add run-rustfix …
Make vec_box MachineApplicable
Remove conditionals from base builds …
Adding lint for too many lines.
Updating number of lines for the failing test to be > 100. …
Running util/dev to update README/CHANGELOG
Reworking function logic, and adding doc example. …
Moving tests to ui-toml to make use of clippy.toml
rustfmt
Adding back tests, but also reducing threshold by 1
Updating to just warn for one test.
Fix test broken by removing comment.
Skipping check if in external macro.
Adding lint for too many lines.
Updating number of lines for the failing test to be > 100. …
Moving tests to ui-toml to make use of clippy.toml
rustfmt
Adding back tests, but also reducing threshold by 1
Updating to just warn for one test.
Fix test broken by removing comment.
Changing single character string to a character match.
Updated readme.
Updating code to ignore rustfmt issue.
phansch and avborhanian
Update clippy_lints/src/types.rs …
Update clippy_lints/src/types.rs …
Auto merge of #3732 - phansch:fix_ice_3720, r=oli-obk …
Auto merge of #3731 - phansch:travis, r=phansch …
Auto merge of #2857 - avborhanian:master, r=phansch …
Fix breakage due to rust-lang/rust#58079 …
Auto merge of #3736 - mikerite:fix-build-20190203, r=phansch …
related with: #58024
Update visibility of intermediate use items.
Fixes#57410 and fixes#53925 and fixes#47816.
Currently, the target of a use statement will be updated with
the visibility of the use statement itself (if the use statement was
visible).
This PR ensures that if the path to the target item is via another
use statement then that intermediate use statement will also have the
visibility updated like the target. This silences incorrect
`unreachable_pub` lints with inactionable suggestions.
Fix `std::os::fortanix_sgx::usercalls::raw::UsercallNrs`
It was 0-indexed but should be 1-indexed. This PR just removes the duplicate code and re-exports the internal enum.
Fixes https://github.com/fortanix/rust-sgx/issues/88
r? @joshtriplett
hir: add HirId to main Hir nodes
This is the 1st PR in a series dedicated to `HirId`-ification, i.e. deprecating `ast::NodeId`s after the AST > HIR lowering process. The bigger proof of concept can be seen in https://github.com/rust-lang/rust/pull/57578.
**Phase 1**: store `HirId` in all remaining (some already have it) main HIR nodes (excluding `*Id` objects).
- [x] `Field`
- [x] `FieldPat`
- [x] `ForeignItem`
- [x] `GenericParam`
- [x] `Lifetime`
- [x] `MacroDef`
- [x] `PathSegment`
- [x] `PatKind::Binding`
- [x] `Stmt`
- [x] `StructField`
- [x] `TypeBinding`
- [x] `VariantData`
- [x] `WhereClause`
- [x] `WhereEqPredicate`
r? @Zoxc
Cc @varkor
Currently, the target of a use statement will be updated with
the visibility of the use statement itself (if the use statement was
visible).
This commit ensures that if the path to the target item is via another
use statement then that intermediate use statement will also have the
visibility updated like the target. This silences incorrect
`unreachable_pub` lints with inactionable suggestions.
targets: aarch64-unknown-none: Add +strict-align
On AArch64, an unaligned access causes a synchronous exception. In the current
state of the target, the compiler might generate unaligned accesses, see
https://github.com/rust-embedded/rust-raspi3-tutorial/issues/10.
Since this is a bare-metal target, it is possible that there is no exception
handling in place (yet) to recover from this case, causing a binary to just
silently fail.
Add `+strict-align` to avoid this case.
NVPTX target specification
This change adds a built-in `nvptx64-nvidia-cuda` GPGPU no-std target specification and a basic PTX assembly smoke tests.
The approach is taken here and the target spec is based on `ptx-linker`, a project started about 1.5 years ago. Key feature: bitcode object files being linked with LTO into the final module on the linker's side.
Prior to this change, the linker used a `ld` linker-flavor, but I think, having the special CLI convention is a more reliable way.
Questions about further progress on reliable CUDA workflow with Rust:
1. Is it possible to create a test suite `codegen-asm` to verify end-to-end integration with LLVM backend?
1. How would it be better to organise no-std `compile-fail` tests: add `#![no_std]` where possible and mark others as `ignore-nvptx` directive, or alternatively, introduce `compile-fail-no-std` test suite?
1. Can we have the `ptx-linker` eventually be integrated as `rls` or `clippy`? Hopefully, this should allow to statically link against LLVM used in Rust and get rid of the [current hacky solution](https://github.com/denzp/rustc-llvm-proxy).
1. Am I missing some methods from `rustc_codegen_ssa:🔙:linker::Linker` that can be useful for bitcode-only linking?
Currently, there are no major public CUDA projects written in Rust I'm aware of, but I'm expecting to have a built-in target will create a solid foundation for further experiments and awesome crates.
Related to #38789Fixes#38787Fixes#38786
On AArch64, an unaligned access causes a synchronous exception. In the current
state of the target, the compiler might generate unaligned accesses, see
https://github.com/rust-embedded/rust-raspi3-tutorial/issues/10.
Since this is a bare-metal target, it is possible that there is no exception
handling in place (yet) to recover from this case, causing a binary to just
silently fail.
Add `+strict-align` to avoid this case.
Implement public/private dependency feature
Implements https://github.com/rust-lang/rust/issues/44663
The core implementation is done - however, there are a few issues that still need to be resolved:
- [x] The `EXTERNAL_PRIVATE_DEPENDENCY` lint currently does notthing when the `public_private_dependencies` is not enabled. Should mentioning the lint (in an `allow` or `deny` attribute) be an error if the feature is not enabled? (Resolved- the feature was removed)
- [x] Crates with the name `core` and `std` are always marked public, without the need to explcitily specify them on the command line. Is this what we want to do? Do we want to allow`no_std`/`no_core` crates to explicitly control this in some way? (Resolved - private crates are now explicitly specified)
- [x] Should I add additional UI tests? (Resolved - added more tests)
- [x] Does it make sense to be able to allow/deny the `EXTERNAL_PRIVATE_DEPENDENCY` on an individual item? (Resolved - this is implemented)
