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unicode-table-generator panicked while populating distinct_indices
because of duplicated indices. This was introduced by swapping the
order of canonical_words.push(...) and canonical_words.len().
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make char::is_whitespace unstably const
I am adding this to the existing https://github.com/rust-lang/rust/issues/132241 feature gate, since `is_digit` and `is_whitespace` seem similar enough that one can group them together.
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unicode_data.rs: show command for generating file
https://github.com/rust-lang/rust/pull/131647 made this an easily runnable tool, now we just have to mention that in the comment. :)
Fixes https://github.com/rust-lang/rust/issues/131640.
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Register `src/tools/unicode-table-generator` as a runnable tool
It seems like `src/tools/unicode-table-generator` is not currently managed by bootstrap. This PR wires it up with bootstrap as a runnable tool.
This tool seems to take two possible args:
1. (Mandatory) path to `library/core/src/unicode/unicode_data.rs`, and
2. (Optional) path to generate a test file.
I only passed the mandatory path to `unicode_data.rs` in bootstrap and didn't do anything about (2). I'm not sure about how this tool is supposed to be run.
`Cargo.lock` is modified because I renamed `unicode-table-generator`'s bin name to match the tool name, as bootstrap's tool running logic expects the bin name to be derived from the tool name.
I also added a triagebot message to remind to not manually edit the library source file and edit the tool then regenerate instead, but this should probably be a tidy check (if that's desirable then that can be in a follow-up PR, though may be overkill).
Helps with #131640 but does not close it because still no docs.
r? `@Mark-Simulacrum` (since I think you authored this tool?)
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These comments were updated on master but not through this tool, so the
comments in the tool became outdated. Sync the comments to stay
consistent.
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Bootstrap assumes that the binary name is the same as tool name, just
makes everyone's lives easier.
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The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
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This adds a dedicated check for the lower bound
(if it is outside of ASCII range) to the output of the `unicode-table-generator` tool.
This generalized the ASCII-only fast-path, but only for the `Grapheme_Extend` property for now,
as that is the only one with a lower bound outside of ASCII.
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The indices are encoded as `u32`s in the range of invalid `char`s, so
that we know that if any mapping fails to parse as a `char` we should
use the value for lookup in the multi-table.
This avoids the second binary search in cases where a multi-`char`
mapping is needed.
Idea from @nikic
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The majority of char case replacements are single char replacements,
so storing them as [char; 3] wastes a lot of space.
This commit splits the replacement tables for both `to_lower` and
`to_upper` into two separate tables, one with single-character mappings
and one with multi-character mappings.
This reduces the binary size for programs using all of these tables
with roughly 24K bytes.
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Since ascii chars are already handled by a special case in the
`to_lower` and `to_upper` functions, there's no need to waste space on
them in the LUTs.
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Implements #101400.
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Avoid cloning a collection only to iterate over it
`@rustbot` label: +C-cleanup
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Smaller improvements of tidy and the unicode generator
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Reduce duplication by moving fetching logic into a dedicated function.
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This updates the standard library's documentation to use the new syntax. The
documentation is worthwhile to update as it should be more idiomatic
(particularly for features like this, which are nice for users to get acquainted
with). The general codebase is likely more hassle than benefit to update: it'll
hurt git blame, and generally updates can be done by folks updating the code if
(and when) that makes things more readable with the new format.
A few places in the compiler and library code are updated (mostly just due to
already having been done when this commit was first authored).
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The "Alphabetic" property in Unicode 14 grew too big for the bitset
representation, panicking "cannot pack 264 into 8 bits". However, we
were already choosing the skiplist for that anyway, so this doesn't need
to be a hard failure. That panic is now a returned `Err`, and then in
`emit_codepoints` we automatically defer to skiplist.
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Since RFC 3052 soft deprecated the authors field anyway, hiding it from
crates.io, docs.rs, and making Cargo not add it by default, and it is
not generally up to date/useful information, we should remove it from
crates in this repo.
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clippy::useless_format, clippy:::for_kv_map
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