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2019-07-07syntax: Pre-intern names of all built-in macrosVadim Petrochenkov-1/+1
They always end up interned anyway
2019-07-06Rollup merge of #62329 - matklad:no-peeking, r=petrochenkovMazdak Farrokhzad-156/+93
Remove support for 1-token lookahead from the lexer `StringReader` maintained `peek_token` and `peek_span_src_raw` for look ahead. `peek_token` was used only by rustdoc syntax coloring. After moving peeking logic into highlighter, I was able to remove `peek_token` from the lexer. I tried to use `iter::Peekable`, but that wasn't as pretty as I hoped, due to buffered fatal errors. So I went with hand-rolled peeking. After that I've noticed that the only peeking behavior left was for raw tokens to test tt jointness. I've rewritten it in terms of trivia tokens, and not just spans. After that it became possible to simplify the awkward constructor of the lexer, which could return `Err` if the first peeked token contained error.
2019-07-05Rollup merge of #62292 - Centril:split-async-closures, r=cramertjMazdak Farrokhzad-0/+1
Move `async || ...` closures into `#![feature(async_closure)]` The `async || expr` syntax is moved out from `#![feature(async_await)]` into its own gate `#![feature(async_closure)]`. New tracking issue: https://github.com/rust-lang/rust/issues/62290 Closes https://github.com/rust-lang/rust/issues/62214. cc https://github.com/rust-lang/rust/issues/62149 r? @varkor
2019-07-04make unwrap_or_abort non-generic againAleksey Kladov-1/+1
2019-07-04remove unused mk_sp_and_rawAleksey Kladov-10/+3
2019-07-04don't rely on spans when checking tokens for jointnessAleksey Kladov-47/+29
2019-07-04slightly comment lexer APIAleksey Kladov-11/+18
2019-07-04move constructors to topAleksey Kladov-51/+51
2019-07-04cleanup lexer constructorsAleksey Kladov-14/+6
2019-07-04remove peek_span_src_raw from StringReaderAleksey Kladov-68/+45
2019-07-04remove peek_token from StringReaderAleksey Kladov-18/+8
2019-07-04remove StringReader::peekAleksey Kladov-4/+0
The reader itself doesn't need ability to peek tokens, so it's better if clients implement this functionality. This hopefully becomes especially easy once we use iterator interface for lexer, but this is not too easy at the moment, because of buffered errors.
2019-07-04Rollup merge of #62297 - matklad:peek-delimited, r=petrochenkovMazdak Farrokhzad-67/+72
refactor check_for_substitution No behavior change, just flatter and simpler code. r? @petrochenkov
2019-07-03Add separate 'async_closure' feature gate.Mazdak Farrokhzad-0/+1
2019-07-02refactor check_for_substitutionAleksey Kladov-67/+72
No behavior change, just flatter and simpler code
2019-06-25cleanup: rename name_from to symbol_fromAleksey Kladov-20/+19
Lexer uses Symbols for a lot of stuff, not only for identifiers, so the "name" terminology is just confusing.
2019-06-25refactor lexer to use idiomatic borrowingAleksey Kladov-121/+104
2019-06-23let_chains: Inline visit_expr_with_let_maybe_allowed.Mazdak Farrokhzad-0/+1
2019-06-12Auto merge of #60669 - c410-f3r:attrs-fn, r=petrochenkovbors-0/+1
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
2019-06-10Auto merge of #60793 - Xanewok:raw-string-cleanup, r=petrochenkovbors-100/+58
lexer: Disallow bare CR in raw byte strings Handles bare CR ~but doesn't translate `\r\n` to `\n` yet in raw strings yet~ and translates CRLF to LF in raw strings. As a side-note I think it'd be good to change the `unescape_` to return plain iterators to reduce some boilerplate (e.g. `has_error` could benefit from collecting `Result<T>` and aborting early on errors) but will do that separately, unless I missed something here that prevents it. @matklad @petrochenkov thoughts?
2019-06-09Actually translate CRLF in raw byte strings and unify unescape implIgor Matuszewski-2/+2
2019-06-09Add a doc comment for scan_raw_stringIgor Matuszewski-0/+2
2019-06-09Allow attributes in formal function parametersCaio-0/+1
2019-06-09Translate CRLF -> LF in raw (byte) stringsIgor Matuszewski-2/+2
2019-06-08Prohibit bare CRs in raw byte stringsIgor Matuszewski-70/+24
2019-06-08Validate and transcribe raw strings via unescape moduleIgor Matuszewski-21/+24
2019-06-08syntax: Remove `Deref` impl from `Token`Vadim Petrochenkov-1/+1
2019-06-08syntax: Move most of the `TokenKind` methods to `Token`Vadim Petrochenkov-3/+3
2019-06-08Remove redundant, commented out codeIgor Matuszewski-6/+0
It was commented out as part of https://github.com/rust-lang/rust/commit/8a8e497ae786ffc032c1e68fc23da0edcf6fa5e3. Done probably by accident, since the code in question was moved to a match arm, along with newly introduced logic to detect bare CRs in raw strings.
2019-06-08Separate a `scan_raw_string` (similar `raw_byte` variant)Igor Matuszewski-77/+82
2019-06-08Clean up minor bitsIgor Matuszewski-1/+1
2019-06-06syntax: Remove duplicate span from `token::Ident`Vadim Petrochenkov-16/+6
2019-06-06syntax: Remove duplicate span from `token::Lifetime`Vadim Petrochenkov-9/+5
2019-06-06syntax: Add some helper methods to `Token`Vadim Petrochenkov-39/+26
2019-06-06syntax: Use `Token` in `StringReader` and `TokenTreesReader`Vadim Petrochenkov-46/+32
2019-06-06syntax: Use `Token` in `TokenTree::Token`Vadim Petrochenkov-23/+19
2019-06-06syntax: Rename `TokenAndSpan` into `Token`Vadim Petrochenkov-79/+64
2019-06-06syntax: Rename `Token` into `TokenKind`Vadim Petrochenkov-17/+17
2019-05-27Pre-intern "0", "1", ..., "9", and use where appropriate.Nicholas Nethercote-2/+2
2019-05-23syntax: Turn `token::Lit` into a structVadim Petrochenkov-54/+51
2019-05-21Move `edition` outside the hygiene lock and avoid accessing itJohn Kåre Alsaker-15/+16
2019-05-16Auto merge of #60763 - matklad:tt-parser, r=petrochenkovbors-37/+56
Move token tree related lexer state to a separate struct Just a types-based refactoring. We only used a bunch of fields when tokenizing into a token tree, so let's move them out of the base lexer
2019-05-13move raw span to tt readerAleksey Kladov-1/+2
See https://github.com/rust-lang/rust/pull/50838/files#r283296243 for explanation how jointness checking works with *next* pair
2019-05-13move span and token to tt readerAleksey Kladov-38/+34
2019-05-13Move token tree related lexer state to a separate structAleksey Kladov-44/+66
We only used a bunch of fields when tokenizing into a token tree, so let's move them out of the base lexer
2019-05-11Move literal parsing code into a separate fileVadim Petrochenkov-13/+6
Remove some dead code
2019-05-11Eliminate `comments::Literal`Vadim Petrochenkov-26/+3
2019-05-09Rollup merge of #60188 - estebank:recover-block, r=varkorMazdak Farrokhzad-1/+2
Identify when a stmt could have been parsed as an expr There are some expressions that can be parsed as a statement without a trailing semicolon depending on the context, which can lead to confusing errors due to the same looking code being accepted in some places and not others. Identify these cases and suggest enclosing in parenthesis making the parse non-ambiguous without changing the accepted grammar. Fix #54186, cc #54482, fix #59975, fix #47287.
2019-05-06review comments: fix typo and add commentsEsteban Küber-1/+1
2019-05-02introduce unescape moduleAleksey Kladov-443/+142
Currently, we deal with escape sequences twice: once when we lex a string, and a second time when we unescape literals. This PR aims to remove this duplication, by introducing a new `unescape` mode as a single source of truth for character escaping rules
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