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libarena -> librustc_arena
libfmt_macros -> librustc_parse_format
libgraphviz -> librustc_graphviz
libserialize -> librustc_serialize
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Previously:
error: invalid format string: invalid argument name `_x`
--> src/main.rs:2:16
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2 | println!("{_x}", a=0);
| ^^ invalid argument name in format string
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= note: argument names cannot start with an underscore
Not supporting identifiers starting with underscore appears to have been
an arbitrary limitation from 2013 in code that was most likely never
reviewed:
https://github.com/rust-lang/rust/pull/8245/files#diff-0347868ef389c805e97636623e4a4ea6R277
The error message was dutifully improved in #50610 but is there any
reason that leading underscore would be a special case?
This commit updates the format_args parser to accept identifiers with
leading underscores.
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When a formatting string contains an invalid descriptor, point at it
instead of the argument:
```
error: unknown format trait `foo`
--> $DIR/ifmt-bad-arg.rs:86:17
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LL | println!("{:foo}", 1);
| ^^^
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= note: the only appropriate formatting traits are:
- ``, which uses the `Display` trait
- `?`, which uses the `Debug` trait
- `e`, which uses the `LowerExp` trait
- `E`, which uses the `UpperExp` trait
- `o`, which uses the `Octal` trait
- `p`, which uses the `Pointer` trait
- `b`, which uses the `Binary` trait
- `x`, which uses the `LowerHex` trait
- `X`, which uses the `UpperHex` trait
```
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On the call site, `rustc_lexer::is_whitespace` reads much better than
`character_properties::is_whitespace`.
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They are only used by rustc_lexer, and are not needed elsewhere.
So we move the relevant definitions into rustc_lexer (while the actual
unicode data comes from the unicode-xid crate) and make the rest of
the compiler use it.
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On `format!()` arg count mismatch provide extra info
When positional width and precision formatting flags are present in a
formatting string that has an argument count mismatch, provide extra
information pointing at them making it easiser to understand where the
problem may lay:
```
error: 4 positional arguments in format string, but there are 3 arguments
--> $DIR/ifmt-bad-arg.rs:78:15
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LL | println!("{} {:.*} {}", 1, 3.2, 4);
| ^^ ^^--^ ^^ --- this parameter corresponds to the precision flag
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| this precision flag adds an extra required argument at position 1, which is why there are 4 arguments expected
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= note: positional arguments are zero-based
= note: for information about formatting flags, visit https://doc.rust-lang.org/std/fmt/index.html
error: 4 positional arguments in format string, but there are 3 arguments
--> $DIR/ifmt-bad-arg.rs:81:15
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LL | println!("{} {:07$.*} {}", 1, 3.2, 4);
| ^^ ^^-----^ ^^ --- this parameter corresponds to the precision flag
| | |
| | this precision flag adds an extra required argument at position 1, which is why there are 4 arguments expected
| this width flag expects an `usize` argument at position 7, but there are 3 arguments
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= note: positional arguments are zero-based
= note: for information about formatting flags, visit https://doc.rust-lang.org/std/fmt/index.html
error: invalid reference to positional argument 7 (there are 3 arguments)
--> $DIR/ifmt-bad-arg.rs:84:18
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LL | println!("{} {:07$} {}", 1, 3.2, 4);
| ^^^--^
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| this width flag expects an `usize` argument at position 7, but there are 3 arguments
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= note: positional arguments are zero-based
= note: for information about formatting flags, visit https://doc.rust-lang.org/std/fmt/index.html
```
Fix #49384.
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When positional width and precision formatting flags are present in a
formatting string that has an argument count mismatch, provide extra
information pointing at them making it easiser to understand where the
problem may lay:
```
error: 4 positional arguments in format string, but there are 3 arguments
--> $DIR/ifmt-bad-arg.rs:78:15
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LL | println!("{} {:.*} {}", 1, 3.2, 4);
| ^^ ^^--^ ^^ --- this parameter corresponds to the precision flag
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| this precision flag adds an extra required argument at position 1, which is why there are 4 arguments expected
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= note: positional arguments are zero-based
= note: for information about formatting flags, visit https://doc.rust-lang.org/std/fmt/index.html
error: 4 positional arguments in format string, but there are 3 arguments
--> $DIR/ifmt-bad-arg.rs:81:15
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LL | println!("{} {:07$.*} {}", 1, 3.2, 4);
| ^^ ^^-----^ ^^ --- this parameter corresponds to the precision flag
| | |
| | this precision flag adds an extra required argument at position 1, which is why there are 4 arguments expected
| this width flag expects an `usize` argument at position 7, but there are 3 arguments
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= note: positional arguments are zero-based
= note: for information about formatting flags, visit https://doc.rust-lang.org/std/fmt/index.html
error: 3 positional arguments in format string, but there are 3 arguments
--> $DIR/ifmt-bad-arg.rs:84:15
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LL | println!("{} {:07$} {}", 1, 3.2, 4);
| ^^ ^^---^ ^^
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| this width flag expects an `usize` argument at position 7, but there are 3 arguments
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= note: positional arguments are zero-based
= note: for information about formatting flags, visit https://doc.rust-lang.org/std/fmt/index.html
```
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I think this was left out by accident from the "convert everything to
rlibs" commit, there's no need for this to be a dylib just as everything
else doesn't need to be a dylib!
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rustbuild
Remove some random unnecessary lint `allow`s
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At the moment, `rustc_private` as a (library) feature exists by
accident: `char::is_xid_start`, `char::is_xid_continue` methods in
libcore define it.
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Now that procedural macros no longer link transitively to libsyntax,
this shouldn't be needed any more! This commit is an experiment in
removing all dynamic libraries from rustc except for librustc_driver
itself. Let's see how far we can get with that!
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Use Symbol, Span in libfmt_macros
I'm not super happy with this, personally, but I think it might be a decent start -- happy to take suggestions as to how to expand this or change things further.
r? @estebank
Fixes #60795
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This should be used when trying to get at subsets of a larger span,
especially when the larger span is not available in the code attempting
to work with those subsets (especially common in the fmt_macros crate).
This is usually a good replacement for (BytePos, BytePos) and (usize,
usize) tuples.
This commit also removes from_inner_byte_pos, since it took usize
arguments, which is error prone.
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- libfmt_macros
- librustdoc
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Fix some minor warnings
Since apparently RLS works when initialized in the root repository (:tada:) I decided to fix some of the issues it caught.
There are a lot of unused attribute warnings left on `rustc_on_unimplemented` and `rustc_layout_scalar_valid_range_start` but I imagine we can't do much about it due to 2-stage compilation?
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name old2 ns/iter new2 ns/iter diff ns/iter diff % speedup
fmt::write_str_macro1 12,295 12,308 13 0.11% x 1.00
fmt::write_str_macro2 24,079 21,451 -2,628 -10.91% x 1.12
fmt::write_str_macro_debug 238,363 230,807 -7,556 -3.17% x 1.03
fmt::write_str_ref 6,203 6,064 -139 -2.24% x 1.02
fmt::write_str_value 6,225 6,075 -150 -2.41% x 1.02
fmt::write_vec_macro1 17,144 17,121 -23 -0.13% x 1.00
fmt::write_vec_macro2 29,845 26,703 -3,142 -10.53% x 1.12
fmt::write_vec_macro_debug 248,840 242,117 -6,723 -2.70% x 1.03
fmt::write_vec_ref 5,954 6,438 484 8.13% x 0.92
fmt::write_vec_value 5,959 6,439 480 8.06% x 0.93
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When a format string has escaped whitespace characters format
arguments were shifted by one per each escaped character. Account
for these escaped characters when synthesizing the spans.
Fix #55155.
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- Point at opening mismatched formatting brace
- Account for differences between raw and regular strings
- Account for differences between the code snippet and `InternedString`
- Add more tests
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Fixes #53836.
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Co-authored-by: nikomatsakis
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