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* bpo-40769: Allow extra surrounding parentheses for invalid annotated ↵Batuhan Taskaya2020-06-271-2/+10
| | | | assignment rule (GH-20387)
* bpo-41119: Output correct error message for list/tuple followed by colon ↵Lysandros Nikolaou2020-06-261-5/+5
| | | | (GH-21160)
* bpo-41060: Avoid SEGFAULT when calling GET_INVALID_TARGET in the grammar ↵Lysandros Nikolaou2020-06-211-19/+4
| | | | | | | | | (GH-21020) `GET_INVALID_TARGET` might unexpectedly return `NULL`, which if not caught will cause a SEGFAULT. Therefore, this commit introduces a new inline function `RAISE_SYNTAX_ERROR_INVALID_TARGET` that always checks for `GET_INVALID_TARGET` returning NULL and can be used in the grammar, replacing the long C ternary operation used till now.
* bpo-40334: Produce better error messages on invalid targets (GH-20106)Lysandros Nikolaou2020-06-191-25/+52
| | | | | | | | | | | | | | The following error messages get produced: - `cannot delete ...` for invalid `del` targets - `... is an illegal 'for' target` for invalid targets in for statements - `... is an illegal 'with' target` for invalid targets in with statements Additionally, a few `cut`s were added in various places before the invocation of the `invalid_*` rule, in order to speed things up. Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
* Remove unnecessary grammar decorations and change header (GH-20819)Pablo Galindo2020-06-121-2/+1
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* bpo-40939: Remove PEG parser easter egg (__new_parser__) (#20802)Lysandros Nikolaou2020-06-111-1/+0
| | | It no longer serves a purpose (there's only one parser) and having "new" in any name will eventually look odd. Also, it impinges on a potential sub-namespace, `__new_...__`.
* Raise specialised syntax error for invalid lambda parameters (GH-20776)Pablo Galindo2020-06-101-1/+8
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* bpo-40903: Handle multiple '=' in invalid assignment rules in the PEG parser ↵Pablo Galindo2020-06-071-2/+3
| | | | | (GH-20697) Automerge-Triggered-By: @pablogsal
* bpo-40334: Produce better error messages for non-parenthesized genexps ↵Lysandros Nikolaou2020-05-221-0/+3
| | | | | | (GH-20153) The error message, generated for a non-parenthesized generator expression in function calls, was still the generic `invalid syntax`, when the generator expression wasn't appearing as the first argument in the call. With this patch, even on input like `f(a, b, c for c in d, e)`, the correct error message gets produced.
* bpo-40715: Reject dict unpacking on dict comprehensions (GH-20292)Batuhan Taskaya2020-05-211-5/+10
| | | | | Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com> Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
* bpo-40176: Improve error messages for trailing comma on from import (GH-20294)Batuhan Taskaya2020-05-211-1/+5
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* bpo-40334: Reproduce error message for type comments on bare '*' in the new ↵Lysandros Nikolaou2020-05-181-0/+1
| | | | parser (GH-20151)
* bpo-40334: Correctly identify invalid target in assignment errors (GH-20076)Pablo Galindo2020-05-151-2/+11
| | | Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
* bpo-40618: Disallow invalid targets in augassign and except clauses (GH-20083)Lysandros Nikolaou2020-05-141-9/+8
| | | | | | | | | This commit fixes the new parser to disallow invalid targets in the following scenarios: - Augmented assignments must only accept a single target (Name, Attribute or Subscript), but no tuples or lists. - `except` clauses should only accept a single `Name` as a target. Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
* bpo-40334: Always show the caret on SyntaxErrors (GH-20050)Lysandros Nikolaou2020-05-131-12/+17
| | | | | | | | | | | | | | This commit fixes SyntaxError locations when the caret is not displayed, by doing the following: - `col_number` always gets set to the location of the offending node/expr. When no caret is to be displayed, this gets achieved by setting the object holding the error line to None. - Introduce a new function `_PyPegen_raise_error_known_location`, which can be called, when an arbitrary `lineno`/`col_offset` needs to be passed. This function then gets used in the grammar (through some new macros and inline functions) so that SyntaxError locations of the new parser match that of the old.
* bpo-40334: produce specialized errors for invalid del targets (GH-19911)Shantanu2020-05-111-3/+10
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* bpo-40334: Error message for invalid default args in function call (GH-19973)Lysandros Nikolaou2020-05-071-0/+4
| | | | | When parsing something like `f(g()=2)`, where the name of a default arg is not a NAME, but an arbitrary expression, a specialised error message is emitted.
* bpo-40334: Allow trailing comma in parenthesised context managers (GH-19964)Pablo Galindo2020-05-061-2/+2
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* bpo-40334: Add type to the assignment rule in the grammar file (GH-19963)Lysandros Nikolaou2020-05-061-1/+1
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* bpo-40334: Spacialized error message for invalid args after bare '*' (GH-19865)Lysandros Nikolaou2020-05-041-0/+6
| | | When parsing things like `def f(*): pass` the old parser used to output `SyntaxError: named arguments must follow bare *`, which the new parser wasn't able to do.
* bpo-40493: fix function type comment parsing (GH-19894)Shantanu2020-05-031-0/+4
| | | | | The grammar for func_type_input rejected things like `(*t1) ->t2`. This fixes that. Automerge-Triggered-By: @gvanrossum
* bpo-40334: Refactor lambda_parameters similar to parameters (GH-19830)Guido van Rossum2020-05-011-20/+34
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* bpo-40334: Correct return value of func_type_comment (GH-19833)Pablo Galindo2020-05-011-1/+1
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* bpo-40334: Improve column offsets for thrown syntax errors by Pegen (GH-19782)Batuhan Taskaya2020-05-011-1/+1
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* bpo-40334: Add support for feature_version in new PEG parser (GH-19827)Lysandros Nikolaou2020-04-301-29/+51
| | | | | | | | | | | | | | | | | | | `ast.parse` and `compile` support a `feature_version` parameter that tells the parser to parse the input string, as if it were written in an older Python version. The `feature_version` is propagated to the tokenizer, which uses it to handle the three different stages of support for `async` and `await`. Additionally, it disallows the following at parser level: - The '@' operator in < 3.5 - Async functions in < 3.5 - Async comprehensions in < 3.6 - Underscores in numeric literals in < 3.6 - Await expression in < 3.5 - Variable annotations in < 3.6 - Async for-loops in < 3.5 - Async with-statements in < 3.5 - F-strings in < 3.6 Closes we-like-parsers/cpython#124.
* bpo-40334: Support type comments (GH-19780)Guido van Rossum2020-04-301-32/+77
| | | | | | | | | | This implements full support for # type: <type> comments, # type: ignore <stuff> comments, and the func_type parsing mode for ast.parse() and compile(). Closes https://github.com/we-like-parsers/cpython/issues/95. (For now, you need to use the master branch of mypy, since another issue unique to 3.9 had to be fixed there, and there's no mypy release yet.) The only thing missing is `feature_version=N`, which is being tracked in https://github.com/we-like-parsers/cpython/issues/124.
* bpo-40334: Support CO_FUTURE_BARRY_AS_BDFL in the new parser (GH-19721)Pablo Galindo2020-04-271-1/+2
| | | This commit also allows to pass flags to the new parser in all interfaces and fixes a bug in the parser generator that was causing to inline rules with actions, making them disappear.
* bpo-40334: PEP 617 implementation: New PEG parser for CPython (GH-19503)Pablo Galindo2020-04-221-0/+555
Co-authored-by: Guido van Rossum <guido@python.org> Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
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