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rust/src/libsyntax
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bors 4edff843dd Auto merge of #61347 - Centril:stabilize-underscore_const_names, r=petrochenkov 
Stabilize underscore_const_names in 1.37.0

You are now permitted to write:

```rust
const _: $type_expression = $term_expression;
```

That is, we change the [grammar of items](9d1984d7ae/grammar/item.lyg (L3-L42)), as written in [the *`.lyg`* notation](263bf161da (grammar)), from:

```java
Item = attrs:OuterAttr* vis:Vis? kind:ItemKind;
ItemKind =
  | ...
  | Const:{ "const" name:IDENT ":" ty:Type "=" value:Expr ";" }
  | ...
  ;
```

into:

```java
Item = attrs:OuterAttr* vis:Vis? kind:ItemKind;
ItemKind =
  | ...
  | Const:{ "const" name:IdentOrUnderscore ":" ty:Type "=" value:Expr ";" }
  | ...
  ;

IdentOrUnderscore =
  | Named:IDENT
  | NoName:"_"
  ;
```

r? @petrochenkov
2019-06-16 20:33:55 +00:00
..
attr
Auto merge of #60669 - c410-f3r:attrs-fn, r=petrochenkov
2019-06-12 07:38:01 +00:00
diagnostics
Rollup merge of #61813 - matthewjasper:remove-unnecessary-symbol-ops, r=petrochenkov
2019-06-15 17:45:02 +02:00
ext
Rollup merge of #61866 - sinkuu:redundant_clone, r=petrochenkov
2019-06-16 06:05:18 +02:00
parse
Auto merge of #61612 - nnethercote:improve-parse_bottom_expr, r=petrochenkov
2019-06-12 16:30:05 +00:00
print
syntax: Remove Deref impl from Token
2019-06-08 22:38:23 +03:00
util
Change ... to ..= where applicable
2019-06-14 12:24:38 -05:00
ast.rs
Change ... to ..= where applicable
2019-06-14 12:24:38 -05:00
build.rs
Remove licenses
2018-12-25 21:08:33 -07:00
Cargo.toml
Preallocate BUILTIN_ATTRIBUTES symbols and use a hash map instead of looping
2019-04-15 15:20:05 +02:00
config.rs
Allow attributes in formal function parameters
2019-06-09 07:58:40 -03:00
early_buffered_lints.rs
Some code cleanup and tidy/test fixes
2019-06-06 14:04:02 +03:00
entry.rs
Remove the equality operation between Symbol and strings.
2019-05-13 09:31:30 +10:00
error_codes.rs
Added the E0704 error with a link to the Rust reference.
2019-05-01 12:01:52 +02:00
feature_gate.rs
Auto merge of #61347 - Centril:stabilize-underscore_const_names, r=petrochenkov
2019-06-16 20:33:55 +00:00
json.rs
Make -Zemit-artifact-notifications also emit the artifact type
2019-05-21 13:51:36 -07:00
lib.rs
Add deny(unused_lifetimes) to all the crates that have deny(internal).
2019-06-11 14:11:59 +03:00
mut_visit.rs
Allow attributes in formal function parameters
2019-06-09 07:58:40 -03:00
ptr.rs
Aggregation of drive-by cosmetic changes.
2019-06-05 21:09:26 +01:00
README.md
…
show_span.rs
Rename rustc_errors dependency in rust 2018 crates
2019-02-13 00:28:52 +09:00
source_map.rs
syntax/rustc: move mark_span_with_reason back.
2019-06-03 10:20:35 +01:00
std_inject.rs
Avoid unnecessary internings.
2019-05-27 13:58:38 +10:00
test_snippet.rs
Move edition outside the hygiene lock and avoid accessing it
2019-05-21 18:17:05 +02:00
test.rs
Avoid some unnecessary symbol interner operations
2019-06-14 18:54:58 +01:00
tokenstream.rs
put back the workarounds for #60846
2019-06-14 12:19:26 +02:00
visit.rs
Allow attributes in formal function parameters
2019-06-09 07:58:40 -03:00

README.md

The syntax crate contains those things concerned purely with syntax – that is, the AST ("abstract syntax tree"), parser, pretty-printer, lexer, macro expander, and utilities for traversing ASTs.

For more information about how these things work in rustc, see the rustc guide: