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* bpo-36020: Remove snprintf macro in pyerrors.h (GH-20889)Victor Stinner2020-06-151-1/+1
| | | | | | | | | | On Windows, #include "pyerrors.h" no longer defines "snprintf" and "vsnprintf" macros. PyOS_snprintf() and PyOS_vsnprintf() should be used to get portable behavior. Replace snprintf() calls with PyOS_snprintf() and replace vsnprintf() calls with PyOS_vsnprintf().
* Improve readability and style in parser files (GH-20884)Pablo Galindo2020-06-152-119/+160
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* bpo-40939: Remove the old parser (GH-20768)Pablo Galindo2020-06-1120-26697/+24309
| | | This commit removes the old parser, the deprecated parser module, the old parser compatibility flags and environment variables and all associated support code and documentation.
* bpo-40939: Remove PEG parser easter egg (__new_parser__) (#20802)Lysandros Nikolaou2020-06-111-44/+10
| | | 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_...__`.
* bpo-40847: Consider a line with only a LINECONT a blank line (GH-20769)Lysandros Nikolaou2020-06-101-1/+2
| | | | | | | | | | A line with only a line continuation character should be considered a blank line at tokenizer level so that only a single NEWLINE token gets emitted. The old parser was working around the issue, but the new parser threw a `SyntaxError` for valid input. For example, an empty line following a line continuation character was interpreted as a `SyntaxError`. Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
* bpo-39465: Use _PyInterpreterState_GET() (GH-20788)Victor Stinner2020-06-101-9/+9
| | | | | | | | | | | | Replace _PyThreadState_GET() with _PyInterpreterState_GET() in: * get_small_int() * gcmodule.c: add also get_gc_state() function * _PyTrash_deposit_object() * _PyTrash_destroy_chain() * warnings_get_state() * Py_GetRecursionLimit() Cleanup listnode.c: add 'parser' variable.
* Raise specialised syntax error for invalid lambda parameters (GH-20776)Pablo Galindo2020-06-101-407/+712
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* bpo-40903: Handle multiple '=' in invalid assignment rules in the PEG parser ↵Pablo Galindo2020-06-082-234/+429
| | | | | (GH-20697) Automerge-Triggered-By: @pablogsal
* bpo-40904: Fix segfault in the new parser with f-string containing yield ↵Pablo Galindo2020-06-081-0/+3
| | | | statements with no value (GH-20701)
* bpo-40880: Fix invalid read in newline_in_string in pegen.c (#20666)Pablo Galindo2020-06-051-2/+2
| | | | | | | | | | | * bpo-40880: Fix invalid read in newline_in_string in pegen.c * Update Parser/pegen/pegen.c Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com> * Add NEWS entry Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
* bpo-40883: Fix memory leak in fstring_compile_expr in parse_string.c (GH-20667)Pablo Galindo2020-06-051-0/+2
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* bpo-40826: Add _PyOS_InterruptOccurred(tstate) function (GH-20599)Victor Stinner2020-06-031-4/+13
| | | | | | | | | | | | my_fgets() now calls _PyOS_InterruptOccurred(tstate) to check for pending signals, rather calling PyOS_InterruptOccurred(). my_fgets() is called with the GIL released, whereas PyOS_InterruptOccurred() must be called with the GIL held. test_repl: use text=True and avoid SuppressCrashReport in test_multiline_string_parsing(). Fix my_fgets() on Windows: fgets(fp) does crash if fileno(fp) is closed.
* bpo-40826: Fix GIL usage in PyOS_Readline() (GH-20579)Victor Stinner2020-06-011-29/+72
| | | | | | Fix GIL usage in PyOS_Readline(): lock the GIL to set an exception. Pass tstate to my_fgets() and _PyOS_WindowsConsoleReadline(). Cleanup these functions.
* bpo-40614: Respect feature version for f-string debug expressions (GH-20196)Shantanu2020-05-271-0/+5
| | | | Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com> Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
* Refactor error handling code in Parser/pegen/pegen.c (GH-20440)Lysandros Nikolaou2020-05-271-3/+8
| | | | | | Set p->error_indicator in various places, where it's needed, but it's not done. Automerge-Triggered-By: @gvanrossum
* bpo-40217: Ensure Py_VISIT(Py_TYPE(self)) is always called for ↵Pablo Galindo2020-05-271-0/+1
| | | | | | | | | PyType_FromSpec types (reverts GH-19414) (GH-20264) Heap types now always visit the type in tp_traverse. See added docs for details. This reverts commit 0169d3003be3d072751dd14a5c84748ab63a249f. Automerge-Triggered-By: @encukou
* Fix lookahead of soft keywords in the PEG parser (GH-20436)Pablo Galindo2020-05-262-0/+10
| | | Automerge-Triggered-By: @gvanrossum
* Add soft keywords (GH-20370)Guido van Rossum2020-05-262-0/+25
| | | | | | | These are like keywords but they only work in context; they are not reserved except when there is an exact match. This would enable things like match statements without reserving `match` (which would be bad for the `re.match()` function and probably lots of other places). Automerge-Triggered-By: @gvanrossum
* Fix peg_generator compiler warnings under MSVC (GH-20405)Ammar Askar2020-05-261-4/+0
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* bpo-38964: Print correct filename on a SyntaxError in an fstring (GH-20399)Lysandros Nikolaou2020-05-261-5/+2
| | | | | | | | When a `SyntaxError` in the expression part of a fstring is found, the filename attribute of the `SyntaxError` is always `<fstring>`. With this commit, it gets changed to always have the name of the file the fstring resides in. Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
* bpo-40750: Do not expand the new parser debug flags if Py_BUILD_CORE is not ↵Pablo Galindo2020-05-251-1/+1
| | | | defined (GH-20393)
* bpo-40750: Support -d flag in the new parser (GH-20340)Pablo Galindo2020-05-253-23/+4378
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* bpo-36290: Fix keytword collision handling in AST node constructors (GH-12382)Rémi Lapeyre2020-05-241-3/+24
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* Use Py_ssize_t for the column number in the PEG support code (GH-20341)Pablo Galindo2020-05-241-1/+1
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* bpo-40334: Produce better error messages for non-parenthesized genexps ↵Lysandros Nikolaou2020-05-223-1/+73
| | | | | | (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 Taskaya2020-05-211-203/+293
| | | | | 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 Taskaya2020-05-211-150/+207
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* Regenerate the parser (#20195)Pablo Galindo2020-05-181-0/+3
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* bpo-40334: Reproduce error message for type comments on bare '*' in the new ↵Lysandros Nikolaou2020-05-183-23/+44
| | | | parser (GH-20151)
* bpo-40528: Improve AST generation script to do builds simultaneously (GH-19968)Batuhan Taskaya2020-05-181-85/+73
| | | | | | - Switch from getopt to argparse. - Removed the limitation of not being able to produce both C and H simultaneously. This will make it run faster since it parses the asdl definition once and uses the generated tree to generate both the header and the C source.
* bpo-40661: Fix segfault when parsing invalid input (GH-20165)Lysandros Nikolaou2020-05-181-0/+1590
| | | | | | Fix segfaults when parsing very complex invalid input, like `import äˆ ð£„¯ð¢·žð±‹á”€ð””ð‘©±å®ä±¬ð©¾\n𗶽`. Co-authored-by: Guido van Rossum <guido@python.org> Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
* bpo-40334: Improvements to error-handling code in the PEG parser (GH-20003)Lysandros Nikolaou2020-05-171-365/+657
| | | | | | | | The following improvements are implemented in this commit: - `p->error_indicator` is set, in case malloc or realloc fail. - Avoid memory leaks in the case that realloc fails. - Call `PyErr_NoMemory()` instead of `PyErr_Format()`, because it requires no memory. Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
* bpo-40334: Correctly identify invalid target in assignment errors (GH-20076)Pablo Galindo2020-05-153-14/+86
| | | Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
* bpo-40618: Disallow invalid targets in augassign and except clauses (GH-20083)Lysandros Nikolaou2020-05-141-36/+33
| | | | | | | | | 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-40619: Correctly handle error lines in programs without file mode (GH-20090)Pablo Galindo2020-05-141-25/+5
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* bpo-40334: Always show the caret on SyntaxErrors (GH-20050)Lysandros Nikolaou2020-05-133-171/+270
| | | | | | | | | | | | | | 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-40593: Improve syntax errors for invalid characters in source code. ↵Serhiy Storchaka2020-05-122-12/+37
| | | | (GH-20033)
* bpo-40334: produce specialized errors for invalid del targets (GH-19911)Shantanu2020-05-111-170/+292
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* bpo-40585: Normalize errors messages in codeop when comparing them (GH-20030)Pablo Galindo2020-05-111-0/+6
| | | | | | With the new parser, the error message contains always the trailing newlines, causing the comparison of the repr of the error messages in codeop to fail. This commit makes the new parser mirror the old parser's behaviour regarding trailing newlines.
* bpo-40334: Avoid collisions between parser variables and grammar variables ↵Pablo Galindo2020-05-102-5638/+5638
| | | | | | | | | | | | | | | (GH-19987) This is for the C generator: - Disallow rule and variable names starting with `_` - Rename most local variable names generated by the parser to start with `_` Exceptions: - Renaming `p` to `_p` will be a separate PR - There are still some names that might clash, e.g. - anything starting with `Py` - C reserved words (`if` etc.) - Macros like `EXTRA` and `CHECK`
* bpo-40502: Initialize n->n_col_offset (GH-19988)Joannah Nanjekye2020-05-081-0/+1
| | | | | | | | | | * initialize n->n_col_offset * 📜🤖 Added by blurb_it. * Move initialization Co-authored-by: nanjekyejoannah <joannah.nanjekye@ibm.com> Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
* bpo-40555: Check for p->error_indicator in loop rules after the main loop is ↵Pablo Galindo2020-05-081-27/+27
| | | | done (GH-19986)
* bpo-40334: Error message for invalid default args in function call (GH-19973)Lysandros Nikolaou2020-05-071-157/+213
| | | | | 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: Fix error location upon parsing an invalid string literal (GH-19962)Lysandros Nikolaou2020-05-074-23/+30
| | | | | | | When parsing a string with an invalid escape, the old parser used to point to the beginning of the invalid string. This commit changes the new parser to match that behaviour, since it's currently pointing to the end of the string (or to be more precise, to the beginning of the next token).
* bpo-40334: Generate comments in the parser code to improve debugging (GH-19966)Pablo Galindo2020-05-061-1074/+1074
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* bpo-40334: Allow trailing comma in parenthesised context managers (GH-19964)Pablo Galindo2020-05-061-4/+12
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* bpo-40334: Add type to the assignment rule in the grammar file (GH-19963)Lysandros Nikolaou2020-05-061-4/+4
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* bpo-40528: Improve and clear several aspects of the ASDL definition code for ↵Batuhan Taskaya2020-05-063-12/+5
| | | | the AST (GH-19952)
* bpo-40246: Revert reporting of invalid string prefixes (GH-19888)Lysandros Nikolaou2020-05-042-7/+0
| | | | Due to backwards compatibility concerns regarding keywords immediately followed by a string without whitespace between them (like in `bg="#d00" if clear else"#fca"`) will fail to parse, commit 41d5b94af44e34ac05d4cd57460ed104ccf96628 has to be reverted.
* bpo-40334: Spacialized error message for invalid args after bare '*' (GH-19865)Lysandros Nikolaou2020-05-041-206/+456
| | | 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.
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