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```
error: cannot find attribute `sede` in this scope
--> $DIR/missing-derive-3.rs:20:7
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LL | #[sede(untagged)]
| ^^^^
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help: the derive macros `Deserialize` and `Serialize` accept the similarly named `serde` attribute
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LL | #[serde(untagged)]
| +
error: cannot find attribute `serde` in this scope
--> $DIR/missing-derive-3.rs:14:7
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LL | #[serde(untagged)]
| ^^^^^
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note: `serde` is imported here, but it is a crate, not an attribute
--> $DIR/missing-derive-3.rs:4:1
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LL | extern crate serde;
| ^^^^^^^^^^^^^^^^^^^
help: `serde` is an attribute that can be used by the derive macros `Deserialize` and `Serialize`, you might be missing a `derive` attribute
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LL + #[derive(Deserialize, Serialize)]
LL | enum B {
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```
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Review everything that uses `MacroKind`, and switch anything that could
refer to more than one kind to use `MacroKinds`.
Add a new `SyntaxExtensionKind::MacroRules` for `macro_rules!` macros,
using the concrete `MacroRulesMacroExpander` type, and have it track
which kinds it can handle. Eliminate the separate optional `attr_ext`,
now that a `SyntaxExtension` can handle multiple macro kinds.
This also avoids the need to downcast when calling methods on
`MacroRulesMacroExpander`, such as `get_unused_rule`.
Integrate macro kind checking into name resolution's
`sub_namespace_match`, so that we only find a macro if it's the right
type, and eliminate the special-case hack for attributes.
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When trying to construct a struct that has a public field of a private type, suggest using `..` if that field has a default value.
```
error[E0603]: struct `Priv1` is private
--> $DIR/non-exhaustive-ctor.rs:25:39
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LL | let _ = S { field: (), field1: m::Priv1 {} };
| ------ ^^^^^ private struct
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| while setting this field
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note: the struct `Priv1` is defined here
--> $DIR/non-exhaustive-ctor.rs:14:4
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LL | struct Priv1 {}
| ^^^^^^^^^^^^
help: the field `field1` you're trying to set has a default value, you can use `..` to use it
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LL | let _ = S { field: (), .. };
| ~~
```
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remove `P`
Previous work: rust-lang/rust#141603
MCP: https://github.com/rust-lang/compiler-team/issues/878
cc `@nnethercote`
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exported_symbols
The metadata symbol must not be encoded in the crate metadata, and must
be exported from proc-macros. Handling the export of the metadata symbol
in exported_symbols handles both things at once without requiring manual
fixups elsewhere.
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It's only used there.
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Tracks association between `self.sess.opts.externs` (aliases in `--extern alias=rlib`) and resolved `CrateNum`
Intended to allow Rustdoc match the aliases in `--extern-html-root-url`
Force-injected extern crates aren't included, since they're meant for the linker only
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Some `let chains` clean-up
Not sure if this kind of clean-up is welcoming because of size, but I decided to try out one
r? compiler
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Signed-off-by: Jonathan Brouwer <jonathantbrouwer@gmail.com>
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Split exported_symbols for generic and non-generic symbols
This reduces metadata decoder overhead during the monomorphization collector.
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It's like `Symbol` but for byte strings. The interner is now used for
both `Symbol` and `ByteSymbol`. E.g. if you intern `"dog"` and `b"dog"`
you'll get a `Symbol` and a `ByteSymbol` with the same index and the
characters will only be stored once.
The motivation for this is to eliminate the `Arc`s in `ast::LitKind`, to
make `ast::LitKind` impl `Copy`, and to avoid the need to arena-allocate
`ast::LitKind` in HIR. The latter change reduces peak memory by a
non-trivial amount on literal-heavy benchmarks such as `deep-vector` and
`tuple-stress`.
`Encoder`, `Decoder`, `SpanEncoder`, and `SpanDecoder` all get some
changes so that they can handle normal strings and byte strings.
This change does slow down compilation of programs that use
`include_bytes!` on large files, because the contents of those files are
now interned (hashed). This makes `include_bytes!` more similar to
`include_str!`, though `include_bytes!` contents still aren't escaped,
and hashing is still much cheaper than escaping.
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Reduce special casing for the panic runtime
See the individual commits for more info.
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This reduces metadata decoder overhead during the monomorphization collector.
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This used to be necessary for a correct linker order, but ever since the
introduction of symbols.o adding the symbols in question to symbols.o
would work just as well. We do still add dependencies on the panic runtime
to the local crate, but not for #![needs_panic_runtime] crates.
This also removes the runtime-depends-on-needs-runtime test.
inject_dependency_if used to emit this error, but with symbols.o it is
no longer important that there is no dependency and in fact it may be
nice to have panic_abort and panic_unwind directly depend on libstd in
the future for calling std::process::abort().
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To make it match `-Zmacro-stats`, and work better if you have enabled it
for multiple crates.
- Print each crate's name.
- Print a `===` banner at the start and end for separation.
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Currently they have the largest items at the end. I believe the
rationale is that it saves you scrolling up through terminal output
because the important stuff is at the bottom. But it's also surprising
and a bit confusing, and I think the obvious order (big things at the
top) is better.
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Taking inspiration from `-Zmacro-stats`:
- Use "{prefix}" consistently.
- Use names for column widths.
- Write output in a single `eprint!` call, in an attempt to minimize
interleaving of output from different rustc processes.
- Use `repeat` for the long `---` banners.
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Try unremapping compiler sources
See [#t-compiler/help > Span pointing to wrong file location (`rustc-dev` component)](https://rust-lang.zulipchat.com/#narrow/channel/182449-t-compiler.2Fhelp/topic/Span.20pointing.20to.20wrong.20file.20location.20.28.60rustc-dev.60.20component.29/with/521087083).
This PR is a follow-up to rust-lang/rust#141751 regarding the compiler side.
Specifically we now take into account the `CFG_VIRTUAL_RUSTC_DEV_SOURCE_BASE_DIR` env from rust-lang/rust#141751 when trying to unremap sources from `$sysroot/lib/rustlib/rustc-src/rust` (the `rustc-dev` component install directory).
Best reviewed commit by commit.
cc ``@samueltardieu``
r? ``@jieyouxu``
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Introduce `-Zmacro-stats`
Introduce `-Zmacro-stats`.
It collects data about macro expansions and prints them in a table after expansion finishes. It's very useful for detecting macro bloat, especially for proc macros.
r? `@petrochenkov`
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It currently only inserts separators into `usize`s, because that's all
that has been needed so far. `-Zmacro-stats` will need `isize` and `f64`
handling, so this commit adds that.
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r=nnethercote
cstore: Use IndexSet as backing store for postorder dependencies
`<rustc_metadata::creader::CStore>::push_dependencies_in_postorder` showed up in new benchmarks from https://github.com/rust-lang/rustc-perf/pull/2143, hence I gave it a shot to remove an obvious O(n) there.
r? nnethercote
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<rustc_metadata::creader::CStore>::push_dependencies_in_postorder showed up in new benchmarks from https://github.com/rust-lang/rustc-perf/pull/2143, hence I gave it a shot to remove an obvious O(n) there.
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With the stage0 refactor the proc_macro version found in the sysroot
will no longer always match the proc_macro version that proc-macros get
compiled with by the rustc executable that uses this proc_macro. This
will cause problems as soon as the ABI of the bridge gets changed to
implement new features or change the way existing features work.
To fix this, this commit changes rustc crates to depend directly on the
local version of proc_macro which will also be used in the sysroot that
rustc will build.
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disabled
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