The regex library was largely used for non-critical aspects of the compiler and
various external tooling. The library at this point is duplicated with its
out-of-tree counterpart and as such imposes a bit of a maintenance overhead as
well as compile time hit for the compiler itself.
The last major user of the regex library is the libtest library, using regexes
for filters when running tests. This removal means that the filtering has gone
back to substring matching rather than using regexes.
This PR is intended as alternative to #20958. It fixes the same grammar inconsistencies, but does not increase the operator precedence of `..`, leaving it at the same level as the assignment operator.
For previous discussion, see #20811 and #20958.
Grammar changes:
* allow `for _ in 1..i {}` (fixes#20241)
* allow `for _ in 1.. {}` as infinite loop
* prevent use of range notation in contexts where only operators of high precedence are expected (fixes#20811)
Parser code cleanup:
* remove `RESTRICTION_NO_DOTS`
* make `AS_PREC` const and follow naming convention
* make `min_prec` inclusive
r? nikomatsakis
This should fix issue #20797 (but I don't want to close it automatically).
As the actual fix is very small this would be a perfect candidate for a rollup.
Grammar changes:
* allow 'for _ in 1..i {}' (fixes#20241)
* allow 'for _ in 1.. {}' as infinite loop
* prevent use of range notation in contexts where only operators of high
precedence are expected (fixes#20811)
Parser code cleanup:
* remove RESTRICTION_NO_DOTS
* make AS_PREC const and follow naming convention
* make min_prec inclusive
This is a bit of cleanup work to clean out some old deprecated flags and deprecated lint names from the compiler (they've been deprecated for quite awhile now).
This also notably puts `--pretty` behind the `-Z unstable-options` flag (where it was supposed to be previously).
This is little clean code of this PR: #21366. I patched the same thing as aochagavia but too slowly obviously. This is a merge of our two codes, more "rust-like".
closes#20953closes#21361
---
In the future, we will likely derive these `impl`s via syntax extensions or using compiler magic (see #20617). For the time being we can use these manual `impl`s.
r? @aturon
cc @burntsushi @Kroisse
There are two limitations to the macro that this addresses:
1. the expected type is not propagated, coercions don't trigger
2. references inside element expressions don't outlive the `Vec`
Both of these limitations are caused by the block in the
macro expansion, previously needed to trigger a coercion
from `Box<[T; N]>` to `Box<[T]>`, now possible with UFCS.
This does the bare minimum to make registration of error codes work again. After this patch, every call to `span_err!` with an error code gets that error code validated against a list in that crate and a new tidy script `errorck.py` validates that no error codes are duplicated globally.
There are further improvements to be made yet, detailed in #19624.
r? @nikomatsakis
This commit is an implementation of [RFC 565][rfc] which is a stabilization of
the `std::fmt` module and the implementations of various formatting traits.
Specifically, the following changes were performed:
[rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0565-show-string-guidelines.md
* The `Show` trait is now deprecated, it was renamed to `Debug`
* The `String` trait is now deprecated, it was renamed to `Display`
* Many `Debug` and `Display` implementations were audited in accordance with the
RFC and audited implementations now have the `#[stable]` attribute
* Integers and floats no longer print a suffix
* Smart pointers no longer print details that they are a smart pointer
* Paths with `Debug` are now quoted and escape characters
* The `unwrap` methods on `Result` now require `Display` instead of `Debug`
* The `Error` trait no longer has a `detail` method and now requires that
`Display` must be implemented. With the loss of `String`, this has moved into
libcore.
* `impl<E: Error> FromError<E> for Box<Error>` now exists
* `derive(Show)` has been renamed to `derive(Debug)`. This is not currently
warned about due to warnings being emitted on stage1+
While backwards compatibility is attempted to be maintained with a blanket
implementation of `Display` for the old `String` trait (and the same for
`Show`/`Debug`) this is still a breaking change due to primitives no longer
implementing `String` as well as modifications such as `unwrap` and the `Error`
trait. Most code is fairly straightforward to update with a rename or tweaks of
method calls.
[breaking-change]
Closes#21436
This commit removes a number of deprecated flags from the compiler:
* opt-level => -C opt-level
* debuginfo => -C debuginfo
* print-crate-name => --print crate-name
* print-file-name => --print file-names
* no-trans => -Z no-trans
* no-analysis => -Z no-analysis
* parse-only => -Z parse-only
* dep-info => --emit dep-info
This commit also moves the --pretty flag behind `-Z unstable-options` as the
pretty printer will likely not be stable for 1.0
cc #19051
The script is intended as a tool for doing every sort of verifications amenable to Rustdoc's HTML output. For example, link checkers would go to this script. It already parses HTML into a document tree form (with a slight caveat), so future tests can make use of it.
As an example, relevant `rustdoc-*` run-make tests have been updated to use `htmldocck.py` and got their `verify.sh` removed. In the future they may go to a dedicated directory with htmldocck running by default. The detailed explanation of test scripts is provided as a docstring of htmldocck.
cc #19723
