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Now, the lexer will categorize every byte in its input according to the
grammar. The parser skips over these while parsing, thus avoiding their
presence in the input to syntax extensions.
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This removes a bunch of token types. Tokens now store the original, unaltered
numeric literal (that is still checked for correctness), which is parsed into
an actual number later, as needed, when creating the AST.
This can change how syntax extensions work, but otherwise poses no visible
changes.
[breaking-change]
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This shuffles things around a bit so that LIT_CHAR and co store an Ident
which is the original, unaltered literal in the source. When creating the AST,
unescape and postprocess them.
This changes how syntax extensions can work, slightly, but otherwise poses no
visible changes. To get a useful value out of one of these tokens, call
`parse::{char_lit, byte_lit, bin_lit, str_lit}`
[breaking-change]
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formerly, the self identifier was being discarded during parsing, which
stymies hygiene. The best fix here seems to be to attach a self identifier
to ExplicitSelf_, a change that rippled through the rest of the compiler,
but without any obvious damage.
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I believe this comment is now irrelevant, as a result of
commit 6757053cffb585249105fbd76f
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should prevent future bugs
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This updates https://github.com/rust-lang/rust/pull/15075.
Rename `ToStr::to_str` to `ToString::to_string`. The naive renaming ends up with two `to_string` functions defined on strings in the prelude (the other defined via `collections::str::StrAllocating`). To remedy this I removed `StrAllocating::to_string`, making all conversions from `&str` to `String` go through `Show`. This has a measurable impact on the speed of this conversion, but the sense I get from others is that it's best to go ahead and unify `to_string` and address performance for all `to_string` conversions in `core::fmt`. `String::from_str(...)` still works as a manual fast-path.
Note that the patch was done with a script, and ended up renaming a number of other `*_to_str` functions, particularly inside of rustc. All the ones I saw looked correct, and I didn't notice any additional API breakage.
Closes #15046.
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[breaking-change]
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closes #13367
[breaking-change] Use `Sized?` to indicate a dynamically sized type parameter or trait (used to be `type`). E.g.,
```
trait Tr for Sized? {}
fn foo<Sized? X: Share>(x: X) {}
```
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Fix small bug introduced in e38cb972dcf: PatIdent span was incorrect
because self.last_span was being used before the ident token was
parsed.
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Fix small bug introduced in e38cb972dcf: PatIdent span was incorrect
because self.last_span was being used before the ident token was
parsed.
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This was parsed by the parser but completely ignored; not even stored in
the AST!
This breaks code that looks like:
static X: &'static [u8] = &'static [1, 2, 3];
Change this code to the shorter:
static X: &'static [u8] = &[1, 2, 3];
Closes #15312.
[breaking-change]
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Fixes #10536.
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Rationale: for what appear to be historical reasons only, the PatIdent contains
a Path rather than an Ident. This means that there are many places in the code
where an ident is artificially promoted to a path, and---much more problematically---
a bunch of elements from a path are simply thrown away, which seems like an invitation
to some really nasty bugs.
This commit replaces the Path in a PatIdent with a SpannedIdent, which just contains an ident
and a span.
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This change starts denying `*T` in the parser. All code using `*T` should ensure
that the FFI call does indeed take `const T*` on the other side before renaming
the type to `*const T`.
Otherwise, all code can rename `*T` to `*const T`.
[breaking-change]
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This does not yet change the compiler and libraries from `*T` to `*const T` as
it will require a snapshot to do so.
cc #7362
---
Note that the corresponding RFC, https://github.com/rust-lang/rfcs/pull/68, has not yet been accepted. It was [discussed at the last meeting](https://github.com/rust-lang/rust/wiki/Meeting-weekly-2014-06-10#rfc-pr-68-unsafe-pointers-rename-t-to-const-t) and decided to be accepted, however. I figured I'd get started on the preliminary work for the RFC that will be required regardless.
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`for...in`.
Closes #14803.
If you used a structure literal after one of these keywords, surround it
in parentheses.
[breaking-change]
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Unit-like structs are written as `struct Foo;`, but we erroneously
accepted `struct Foo();` and took it to mean the same thing. Now we
don't, so use the `struct Foo;` form!
[breaking-change]
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This will break code that looks like `Box<Trait+>`. Change that code to
`Box<Trait>` instead.
Closes #14925.
[breaking-change]
r? @brson
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This will break code that looks like `Box<Trait+>`. Change that code to
`Box<Trait>` instead.
Closes #14925.
[breaking-change]
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The parser already has special logic for parsing `>` tokens from `>>`, and this
commit extends the logic to the acquiring a `>` from the `>=` and `>>=` tokens
as well.
Closes #15043
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libsyntax: ExprField now contains a SpannedIdent rather than Ident.
[breaking-change]
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This does not yet change the compiler and libraries from `*T` to `*const T` as
it will require a snapshot to do so.
cc #7362
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This removes all remnants of `@` pointers from rustc. Additionally, this removes
the `GC` structure from the prelude as it seems odd exporting an experimental
type in the prelude by default.
Closes #14193
[breaking-change]
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Fix all violations in the Rust source tree of the stronger guarantee
of a unique access path for mutable borrows as described in #12624.
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Fixes #14857.
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RFC #27.
After a snapshot, the old syntax will be removed.
This can break some code that looked like `foo as &Trait:Send`. Now you
will need to write `foo as (&Trait+Send)`.
Closes #12778.
[breaking-change]
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the leading quote part of the identifier for the purposes of hygiene.
This adopts @jbclements' solution to #14539.
I'm not sure if this is a breaking change or not.
Closes #12512.
[breaking-change]
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* The select/plural methods from format strings are removed
* The # character no longer needs to be escaped
* The \-based escapes have been removed
* '{{' is now an escape for '{'
* '}}' is now an escape for '}'
Closes #14810
[breaking-change]
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* The select/plural methods from format strings are removed
* The # character no longer needs to be escaped
* The \-based escapes have been removed
* '{{' is now an escape for '{'
* '}}' is now an escape for '}'
Closes #14810
[breaking-change]
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The following features have been removed
* box [a, b, c]
* ~[a, b, c]
* box [a, ..N]
* ~[a, ..N]
* ~[T] (as a type)
* deprecated_owned_vector lint
All users of ~[T] should move to using Vec<T> instead.
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This is part of the ongoing renaming of the equality traits. See #12517 for more
details. All code using Eq/Ord will temporarily need to move to Partial{Eq,Ord}
or the Total{Eq,Ord} traits. The Total traits will soon be renamed to {Eq,Ord}.
cc #12517
[breaking-change]
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A number of functions/methods have been moved or renamed to align
better with rust standard conventions.
syntax::ext::mtwt::xorPush => xor_push
syntax::parse::parser::Parser => Parser::new
[breaking-change]
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Fixes #8537
Fixes #14499 (duplicate of #8537)
Old:
```rust
test.rs:2 pub extern "xxxxx" fn add(x: int, y: int) -> int {
^~
```
New:
```rust
test.rs:2 pub extern "xxxxx" fn add(x: int, y: int) -> int {
^~~~~~~
```
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Fixes #8537
Fixes #14499
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