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0e4de4ceb0
In [137653], the lang and libs-API teams did a joint FCP to deprecate
and eventually remove the long-unstable `concat_idents!` macro. The
deprecation is landing in 1.88, so do the removal here (target version
1.90).
This macro has been superseded by the more recent `${concat(...)}`
metavariable expression language feature, which avoids some of the
limitations of `concat_idents!`. The metavar expression is unstably
available under the [`macro_metavar_expr_concat`] feature.
History is mildly interesting here: `concat_idents!` goes back to 2011
when it was introduced with 513276e595f8 ("Add #concat_idents[] and
about the same:
let asdf_fdsa = "<.<";
assert(#concat_idents[asd,f_f,dsa] == "<.<");
assert(#ident_to_str[use_mention_distinction]
== "use_mention_distinction");
(That test existed from introduction until its removal here.)
Closes: https://www.github.com/rust-lang/rust/issues/29599
[137653]: https://www.github.com/rust-lang/rust/pull/137653
[`macro_metavar_expr_concat`]: https://www.github.com/rust-lang/rust/issues/124225
260 lines
7.1 KiB
Plaintext
260 lines
7.1 KiB
Plaintext
error: the `#[default]` attribute may only be used on unit enum variants
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--> $DIR/macros-nonfatal-errors.rs:13:5
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LL | #[default]
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| ^^^^^^^^^^
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= help: consider a manual implementation of `Default`
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error: the `#[default]` attribute may only be used on unit enum variants
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--> $DIR/macros-nonfatal-errors.rs:18:36
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LL | struct DefaultInnerAttrTupleStruct(#[default] ());
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| ^^^^^^^^^^
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= help: consider a manual implementation of `Default`
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error: the `#[default]` attribute may only be used on unit enum variants
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--> $DIR/macros-nonfatal-errors.rs:22:1
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LL | #[default]
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| ^^^^^^^^^^
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= help: consider a manual implementation of `Default`
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error: the `#[default]` attribute may only be used on unit enum variants
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--> $DIR/macros-nonfatal-errors.rs:26:1
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LL | #[default]
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| ^^^^^^^^^^
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= help: consider a manual implementation of `Default`
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error: the `#[default]` attribute may only be used on unit enum variants
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--> $DIR/macros-nonfatal-errors.rs:36:11
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LL | Foo = #[default] 0,
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| ^^^^^^^^^^
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= help: consider a manual implementation of `Default`
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error: the `#[default]` attribute may only be used on unit enum variants
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--> $DIR/macros-nonfatal-errors.rs:37:14
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LL | Bar([u8; #[default] 1]),
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| ^^^^^^^^^^
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= help: consider a manual implementation of `Default`
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error[E0665]: `#[derive(Default)]` on enum with no `#[default]`
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--> $DIR/macros-nonfatal-errors.rs:42:10
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LL | #[derive(Default)]
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| ^^^^^^^
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LL | / enum NoDeclaredDefault {
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LL | | Foo,
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LL | | Bar,
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LL | | }
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| |_- this enum needs a unit variant marked with `#[default]`
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help: make this unit variant default by placing `#[default]` on it
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LL | #[default] Foo,
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| ++++++++++
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help: make this unit variant default by placing `#[default]` on it
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LL | #[default] Bar,
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| ++++++++++
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error[E0665]: `#[derive(Default)]` on enum with no `#[default]`
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--> $DIR/macros-nonfatal-errors.rs:48:10
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LL | #[derive(Default)]
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| ^^^^^^^
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LL | / enum NoDeclaredDefaultWithoutUnitVariant {
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LL | | Foo(i32),
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LL | | Bar(i32),
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LL | | }
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| |_- this enum needs a unit variant marked with `#[default]`
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error: multiple declared defaults
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--> $DIR/macros-nonfatal-errors.rs:54:10
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LL | #[derive(Default)]
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| ^^^^^^^
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...
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LL | Foo,
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| --- first default
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LL | #[default]
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LL | Bar,
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| --- additional default
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LL | #[default]
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LL | Baz,
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| --- additional default
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= note: only one variant can be default
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error: `#[default]` attribute does not accept a value
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--> $DIR/macros-nonfatal-errors.rs:66:5
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LL | #[default = 1]
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| ^^^^^^^^^^^^^^
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= help: try using `#[default]`
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error: multiple `#[default]` attributes
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--> $DIR/macros-nonfatal-errors.rs:74:5
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LL | #[default]
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| ---------- `#[default]` used here
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LL | #[default]
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| ---------- `#[default]` used again here
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LL | Foo,
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| ^^^
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= note: only one `#[default]` attribute is needed
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help: try removing this
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--> $DIR/macros-nonfatal-errors.rs:73:5
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LL | #[default]
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| ^^^^^^^^^^
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error: multiple `#[default]` attributes
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--> $DIR/macros-nonfatal-errors.rs:84:5
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LL | #[default]
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| ---------- `#[default]` used here
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LL | #[default]
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| ---------- `#[default]` used again here
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...
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LL | Foo,
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| ^^^
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= note: only one `#[default]` attribute is needed
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help: try removing these
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--> $DIR/macros-nonfatal-errors.rs:81:5
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LL | #[default]
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| ^^^^^^^^^^
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LL | #[default]
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| ^^^^^^^^^^
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LL | #[default]
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| ^^^^^^^^^^
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error: the `#[default]` attribute may only be used on unit enum variants
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--> $DIR/macros-nonfatal-errors.rs:91:5
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LL | Foo {},
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| ^^^
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= help: consider a manual implementation of `Default`
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error: default variant must be exhaustive
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--> $DIR/macros-nonfatal-errors.rs:99:5
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LL | #[non_exhaustive]
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| ----------------- declared `#[non_exhaustive]` here
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LL | Foo,
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| ^^^
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= help: consider a manual implementation of `Default`
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error: asm template must be a string literal
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--> $DIR/macros-nonfatal-errors.rs:104:10
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LL | asm!(invalid);
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| ^^^^^^^
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error: argument must be a string literal
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--> $DIR/macros-nonfatal-errors.rs:107:17
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LL | option_env!(invalid);
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| ^^^^^^^
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error: expected string literal
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--> $DIR/macros-nonfatal-errors.rs:108:10
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LL | env!(invalid);
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| ^^^^^^^
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error: `env!()` takes 1 or 2 arguments
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--> $DIR/macros-nonfatal-errors.rs:109:5
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LL | env!(foo, abr, baz);
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| ^^^^^^^^^^^^^^^^^^^
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error: environment variable `RUST_HOPEFULLY_THIS_DOESNT_EXIST` not defined at compile time
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--> $DIR/macros-nonfatal-errors.rs:110:5
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LL | env!("RUST_HOPEFULLY_THIS_DOESNT_EXIST");
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= help: use `std::env::var("RUST_HOPEFULLY_THIS_DOESNT_EXIST")` to read the variable at run time
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error: format argument must be a string literal
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--> $DIR/macros-nonfatal-errors.rs:112:13
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LL | format!(invalid);
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| ^^^^^^^
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help: you might be missing a string literal to format with
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LL | format!("{}", invalid);
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| +++++
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error: argument must be a string literal
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--> $DIR/macros-nonfatal-errors.rs:114:14
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LL | include!(invalid);
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| ^^^^^^^
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error: argument must be a string literal
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--> $DIR/macros-nonfatal-errors.rs:116:18
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LL | include_str!(invalid);
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| ^^^^^^^
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error: couldn't read `$DIR/i'd be quite surprised if a file with this name existed`: $FILE_NOT_FOUND_MSG
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--> $DIR/macros-nonfatal-errors.rs:117:5
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LL | include_str!("i'd be quite surprised if a file with this name existed");
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: argument must be a string literal
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--> $DIR/macros-nonfatal-errors.rs:118:20
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LL | include_bytes!(invalid);
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| ^^^^^^^
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error: couldn't read `$DIR/i'd be quite surprised if a file with this name existed`: $FILE_NOT_FOUND_MSG
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--> $DIR/macros-nonfatal-errors.rs:119:5
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LL | include_bytes!("i'd be quite surprised if a file with this name existed");
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: trace_macros! accepts only `true` or `false`
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--> $DIR/macros-nonfatal-errors.rs:121:5
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LL | trace_macros!(invalid);
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| ^^^^^^^^^^^^^^^^^^^^^^
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error: default variant must be exhaustive
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--> $DIR/macros-nonfatal-errors.rs:131:9
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LL | #[non_exhaustive]
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| ----------------- declared `#[non_exhaustive]` here
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LL | Foo,
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| ^^^
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= help: consider a manual implementation of `Default`
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error: cannot find macro `llvm_asm` in this scope
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--> $DIR/macros-nonfatal-errors.rs:105:5
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LL | llvm_asm!(invalid);
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| ^^^^^^^^
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error: aborting due to 28 previous errors
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For more information about this error, try `rustc --explain E0665`.
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