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2019-06-23Auto merge of #60861 - Centril:let-chains-ast-intro, r=petrochenkovbors-1/+3
[let_chains, 2/6] Introduce `Let(..)` in AST, remove IfLet + WhileLet and parse let chains Here we remove `ast::ExprKind::{IfLet, WhileLet}` and introduce `ast::ExprKind::Let`. Moreover, we also: + connect the parsing logic for let chains + introduce the feature gate + rewire HIR lowering a bit. However, this does not connect the new syntax to semantics in HIR. That will be the subject of a subsequent PR. Per https://github.com/rust-lang/rust/issues/53667#issuecomment-471583239. Next step after https://github.com/rust-lang/rust/pull/59288. cc @Manishearth re. Clippy. r? @oli-obk
2019-06-23Run rustfmtJulien Cretin-235/+273
2019-06-23Rollup merge of #62068 - ia0:fix_meta_var, r=petrochenkovMazdak Farrokhzad-6/+6
Fix meta-variable binding errors in macros The errors are either: - The meta-variable used in the right-hand side is not bound (or defined) in the left-hand side. - The meta-variable used in the right-hand side does not repeat with the same kleene operator as its binder in the left-hand side. Either it does not repeat enough, or it uses a different operator somewhere. This change should have no semantic impact. Found by https://github.com/rust-lang/rust/pull/62008
2019-06-23let_chains: note re. back-compat wrt. expr beginning.Mazdak Farrokhzad-1/+3
2019-06-23Fix meta-variable binding errors in macrosJulien Cretin-6/+6
The errors are either: - The meta-variable used in the right-hand side is not bound (or defined) in the left-hand side. - The meta-variable used in the right-hand side does not repeat with the same kleene operator as its binder in the left-hand side. Either it does not repeat enough, or it uses a different operator somewhere. This change should have no semantic impact.
2019-06-23let_chains: readd kw::let to ident_can_begin_expr.Mazdak Farrokhzad-1/+1
2019-06-22Lint empty 'derive()' as unused attribute.Mazdak Farrokhzad-4/+0
2019-06-19Rollup merge of #61547 - petrochenkov:cfgen, r=CentrilMazdak Farrokhzad-3/+3
Support `cfg` and `cfg_attr` on generic parameters `cfg` attributes are supported in all other positions where attributes are accepted at all. They were previously prohibited in https://github.com/rust-lang/rust/pull/51283 because they weren't implemented correctly before that and were simply ignored.
2019-06-19Support `cfg` and `cfg_attr` on generic parametersVadim Petrochenkov-3/+3
2019-06-19Rollup merge of #61898 - petrochenkov:sekind, r=eddybMazdak Farrokhzad-245/+134
syntax: Factor out common fields from `SyntaxExtension` variants And some other related cleanups. Continuation of https://github.com/rust-lang/rust/pull/61606. This will also help to unblock https://github.com/rust-lang/rust/pull/61877.
2019-06-18rustc: remove 'x: 'y bounds (except from comments/strings).Eduard-Mihai Burtescu-5/+5
2019-06-18resolve/expand: Move expansion info setting to a single earlier pointVadim Petrochenkov-30/+4
2019-06-18syntax: Move `default_transparency` into `ExpnInfo`Vadim Petrochenkov-1/+2
2019-06-18syntax: Introduce `default`/`with_unstable` constructors for `ExpnInfo`Vadim Petrochenkov-9/+4
2019-06-18syntax: Remove `DummyResolver`Vadim Petrochenkov-25/+0
2019-06-18syntax: Factor out common fields from `SyntaxExtension` variantsVadim Petrochenkov-198/+142
2019-06-16Rollup merge of #61866 - sinkuu:redundant_clone, r=petrochenkovMazdak Farrokhzad-2/+3
Remove redundant `clone()`s
2019-06-15Rollup merge of #61813 - matthewjasper:remove-unnecessary-symbol-ops, ↵Mazdak Farrokhzad-11/+11
r=petrochenkov Remove some unnecessary symbol interner ops * Don't gensym symbols that don't need to worry about colliding with other symbols * Use symbol constants instead of interning string literals in a few places. * Don't generate a module in `__register_diagnostic` r? @petrochenkov
2019-06-15Use `slice::from_ref` instead of cloningShotaro Yamada-2/+3
2019-06-14Avoid some unnecessary symbol interner operationsMatthew Jasper-11/+11
2019-06-12Auto merge of #60669 - c410-f3r:attrs-fn, r=petrochenkovbors-2/+8
Allow attributes in formal function parameters Implements https://github.com/rust-lang/rust/issues/60406. This is my first contribution to the compiler and since this is a large and complex project, I am not fully aware of the consequences of the changes I have made. **TODO** - [x] Forbid some built-in attributes. - [x] Expand cfg/cfg_attr
2019-06-10syntax: Rename variants of `SyntaxExtension` for consistencyVadim Petrochenkov-45/+41
2019-06-10syntax: Improve documentation of `SyntaxExtension`Vadim Petrochenkov-36/+54
2019-06-10syntax: Remove `SyntaxExtension::DeclMacro`Vadim Petrochenkov-77/+61
It's a less powerful duplicate of `SyntaxExtension::NormalTT`
2019-06-10syntax: Use `MultiItemModifier` for built-in derivesVadim Petrochenkov-25/+22
2019-06-10syntax: Remove `SyntaxExtension::MultiDecorator` and `MultiItemDecorator`Vadim Petrochenkov-43/+1
2019-06-10syntax: Remove `SyntaxExtension::IdentTT` and `IdentMacroExpander`Vadim Petrochenkov-60/+0
2019-06-09Allow attributes in formal function parametersCaio-2/+8
2019-06-09pacify tidy.Mazdak Farrokhzad-1/+1
2019-06-09Some more cleanup in libsyntax::ext::tt::quotedMazdak Farrokhzad-11/+8
2019-06-09Cleanups in parse_sep_and_kleene_op.Mazdak Farrokhzad-12/+4
2019-06-09Support ? Kleene operator in 2015.Mazdak Farrokhzad-167/+4
2019-06-09Rollup merge of #61669 - petrochenkov:tokderef2, r=oli-obkMazdak Farrokhzad-66/+51
syntax: Remove `Deref` impl from `Token` Follow up to https://github.com/rust-lang/rust/pull/61541 r? @oli-obk
2019-06-09Rollup merge of #61646 - L117:master, r=CentrilMazdak Farrokhzad-15/+15
Remove useless allocations in macro_rules follow logic. Closes #61543
2019-06-08syntax: Remove `Deref` impl from `Token`Vadim Petrochenkov-23/+13
2019-06-08syntax: Move most of the `TokenKind` methods to `Token`Vadim Petrochenkov-9/+9
2019-06-08syntax: Keep full `Token`s for `macro_rules` separatorsVadim Petrochenkov-35/+30
2019-06-08Remove useless allocations in macro_rules follow logic.L117-15/+15
2019-06-07parser: `self.span` -> `self.token.span`Vadim Petrochenkov-11/+11
2019-06-06Address review commentsVadim Petrochenkov-12/+9
2019-06-06Some code cleanup and tidy/test fixesVadim Petrochenkov-21/+22
2019-06-06syntax: Switch function parameter order in `TokenTree::token`Vadim Petrochenkov-18/+19
2019-06-06syntax: Remove duplicate span from `token::Ident`Vadim Petrochenkov-32/+26
2019-06-06syntax: Remove duplicate span from `token::Lifetime`Vadim Petrochenkov-2/+2
2019-06-06syntax: Add some helper methods to `Token`Vadim Petrochenkov-8/+7
2019-06-06syntax: Use `Token` in `Parser`Vadim Petrochenkov-17/+16
2019-06-06syntax: Use `Token` in `TokenTree::Token`Vadim Petrochenkov-69/+74
2019-06-06syntax: Rename `Token` into `TokenKind`Vadim Petrochenkov-21/+21
2019-06-06Always use token kinds through `token` module rather than `Token` typeVadim Petrochenkov-23/+23
2019-06-05Implemented for function bounds, type bounds, and named existential types.Alexander Regueiro-8/+8
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