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* bpo-35992: Use PySequence_GetItem only if sq_item is not NULL (GH-11857)Ivan Levkivskyi2019-02-171-2/+5
| | | | Not using `__class_getitem__()` fallback if there is a non-subcriptable metaclass was caused by a certain asymmetry between how `PySequenceMethods` and `PyMappingMethods` are used in `PyObject_GetItem`. This PR removes this asymmetry. No tests failed, so I assume it was not intentional.
* bpo-35961: Fix a crash in slice_richcompare() (GH-11830)Victor Stinner2019-02-131-24/+14
| | | | | | | | Fix a crash in slice_richcompare(): use strong references rather than stolen references for the two temporary internal tuples. The crash (or assertion error) occurred if a garbage collection occurred during slice_richcompare(), especially while calling PyObject_RichCompare(t1, t2, op).
* bpo-35911: add cell constructor (GH-11771)Pierre Glaser2019-02-071-1/+41
| | | | Add a cell constructor, expose the cell type in the types module.
* bpo-35845: Add order={'C', 'F', 'A'} parameter to memoryview.tobytes(). (#11730)Stefan Krah2019-02-021-9/+35
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* bpo-35224: PEP 572 Implementation (#10497)Emily Morehouse2019-01-241-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Add tokenization of := - Add token to Include/token.h. Add token to documentation in Doc/library/token.rst. - Run `./python Lib/token.py` to regenerate Lib/token.py. - Update Parser/tokenizer.c: add case to handle `:=`. * Add initial usage of := in grammar. * Update Python.asdl to match the grammar updates. Regenerated Include/Python-ast.h and Python/Python-ast.c * Update AST and compiler files in Python/ast.c and Python/compile.c. Basic functionality, this isn't scoped properly * Regenerate Lib/symbol.py using `./python Lib/symbol.py` * Tests - Fix failing tests in test_parser.py due to changes in token numbers for internal representation * Tests - Add simple test for := token * Tests - Add simple tests for named expressions using expr and suite * Tests - Update number of levels for nested expressions to prevent stack overflow * Update symbol table to handle NamedExpr * Update Grammar to allow assignment expressions in if statements. Regenerate Python/graminit.c accordingly using `make regen-grammar` * Tests - Add additional tests for named expressions in RoundtripLegalSyntaxTestCase, based on examples and information directly from PEP 572 Note: failing tests are currently commented out (4 out of 24 tests currently fail) * Tests - Add temporary syntax test failure tests in test_parser.py Note: There is an outstanding TODO for this -- syntax tests need to be moved to a different file (presumably test_syntax.py), but this is covering what needs to be tested at the moment, and it's more convenient to run a single test for the time being * Add support for allowing assignment expressions as function argument annotations. Uncomment tests for these cases because they all pass now! * Tests - Move existing syntax tests out of test_parser.py and into test_named_expressions.py. Refactor syntax tests to use unittest * Add TargetScopeError exception to extend SyntaxError Note: This simply creates the TargetScopeError exception, it is not yet used anywhere * Tests - Update tests per PEP 572 Continue refactoring test suite: The named expression test suite now checks for any invalid cases that throw exceptions (no longer limited to SyntaxErrors), assignment tests to ensure that variables are properly assigned, and scope tests to ensure that variable availability and values are correct Note: - There are still tests that are marked to skip, as they are not yet implemented - There are approximately 300 lines of the PEP that have not yet been addressed, though these may be deferred * Documentation - Small updates to XXX/todo comments - Remove XXX from child description in ast.c - Add comment with number of previously supported nested expressions for 3.7.X in test_parser.py * Fix assert in seq_for_testlist() * Cleanup - Denote "Not implemented -- No keyword args" on failing test case. Fix PEP8 error for blank lines at beginning of test classes in test_parser.py * Tests - Wrap all file opens in `with...as` to ensure files are closed * WIP: handle f(a := 1) * Tests and Cleanup - No longer skips keyword arg test. Keyword arg test now uses a simpler test case and does not rely on an external file. Remove print statements from ast.c * Tests - Refactor last remaining test case that relied on on external file to use a simpler test case without the dependency * Tests - Add better description of remaning skipped tests. Add test checking scope when using assignment expression in a function argument * Tests - Add test for nested comprehension, testing value and scope. Fix variable name in skipped comprehension scope test * Handle restriction of LHS for named expressions - can only assign to LHS of type NAME. Specifically, restrict assignment to tuples This adds an alternative set_context specifically for named expressions, set_namedexpr_context. Thus, context is now set differently for standard assignment versus assignment for named expressions in order to handle restrictions. * Tests - Update negative test case for assigning to lambda to match new error message. Add negative test case for assigning to tuple * Tests - Reorder test cases to group invalid syntax cases and named assignment target errors * Tests - Update test case for named expression in function argument - check that result and variable are set correctly * Todo - Add todo for TargetScopeError based on Guido's comment (https://github.com/python/cpython/commit/2b3acd37bdfc2d35e5094228c6684050d2aa8b0a#r30472562) * Tests - Add named expression tests for assignment operator in function arguments Note: One of two tests are skipped, as function arguments are currently treating an assignment expression inside of parenthesis as one child, which does not properly catch the named expression, nor does it count arguments properly * Add NamedStore to expr_context. Regenerate related code with `make regen-ast` * Add usage of NamedStore to ast_for_named_expr in ast.c. Update occurances of checking for Store to also handle NamedStore where appropriate * Add ste_comprehension to _symtable_entry to track if the namespace is a comprehension. Initialize ste_comprehension to 0. Set set_comprehension to 1 in symtable_handle_comprehension * s/symtable_add_def/symtable_add_def_helper. Add symtable_add_def to handle grabbing st->st_cur and passing it to symtable_add_def_helper. This now allows us to call the original code from symtable_add_def by instead calling symtable_add_def_helper with a different ste. * Refactor symtable_record_directive to take lineno and col_offset as arguments instead of stmt_ty. This allows symtable_record_directive to be used for stmt_ty and expr_ty * Handle elevating scope for named expressions in comprehensions. * Handle error for usage of named expression inside a class block * Tests - No longer skip scope tests. Add additional scope tests * Cleanup - Update error message for named expression within a comprehension within a class. Update comments. Add assert for symtable_extend_namedexpr_scope to validate that we always find at least a ModuleScope if we don't find a Class or FunctionScope * Cleanup - Add missing case for NamedStore in expr_context_name. Remove unused var in set_namedexpr_content * Refactor - Consolidate set_context and set_namedexpr_context to reduce duplicated code. Special cases for named expressions are handled by checking if ctx is NamedStore * Cleanup - Add additional use cases for ast_for_namedexpr in usage comment. Fix multiple blank lines in test_named_expressions * Tests - Remove unnecessary test case. Renumber test case function names * Remove TargetScopeError for now. Will add back if needed * Cleanup - Small comment nit for consistency * Handle positional argument check with named expression * Add TargetScopeError exception definition. Add documentation for TargetScopeError in c-api docs. Throw TargetScopeError instead of SyntaxError when using a named expression in a comprehension within a class scope * Increase stack size for parser by 200. This is a minimal change (approx. 5kb) and should not have an impact on any systems. Update parser test to allow 99 nested levels again * Add TargetScopeError to exception_hierarchy.txt for test_baseexception.py_ * Tests - Major update for named expression tests, both in test_named_expressions and test_parser - Add test for TargetScopeError - Add tests for named expressions in comprehension scope and edge cases - Add tests for named expressions in function arguments (declarations and call sites) - Reorganize tests to group them more logically * Cleanup - Remove unnecessary comment * Cleanup - Comment nitpicks * Explicitly disallow assignment expressions to a name inside parentheses, e.g.: ((x) := 0) - Add check for LHS types to detect a parenthesis then a name (see note) - Add test for this scenario - Update tests for changed error message for named assignment to a tuple (also, see note) Note: This caused issues with the previous error handling for named assignment to a LHS that contained an expression, such as a tuple. Thus, the check for the LHS of a named expression must be changed to be more specific if we wish to maintain the previous error messages * Cleanup - Wrap lines more strictly in test file * Revert "Explicitly disallow assignment expressions to a name inside parentheses, e.g.: ((x) := 0)" This reverts commit f1531400ca7d7a2d148830c8ac703f041740896d. * Add NEWS.d entry * Tests - Fix error in test_pickle.test_exceptions by adding TargetScopeError to list of exceptions * Tests - Update error message tests to reflect improved messaging convention (s/can't/cannot) * Remove cases that cannot be reached in compile.c. Small linting update. * Update Grammar/Tokens to add COLONEQUAL. Regenerate all files * Update TargetScopeError PRE_INIT and POST_INIT, as this was purposefully left out when fixing rebase conflicts * Add NamedStore back and regenerate files * Pass along line number and end col info for named expression * Simplify News entry * Fix compiler warning and explicity mark fallthrough
* bpo-35713: Reorganize sys module initialization (GH-11658)Victor Stinner2019-01-231-1/+1
| | | | | | | | | * Rename _PySys_BeginInit() to _PySys_InitCore(). * Rename _PySys_EndInit() to _PySys_InitMain(). * Add _PySys_Create(). It calls _PySys_InitCore() which becomes private. * Add _PySys_SetPreliminaryStderr(). * Rename _Py_ReadyTypes() to _PyTypes_Init(). * Misc code cleanup.
* bpo-35713: Split _Py_InitializeCore into subfunctions (GH-11650)Victor Stinner2019-01-226-248/+148
| | | | | | | | | | | | | | * Split _Py_InitializeCore_impl() into subfunctions: add multiple pycore_init_xxx() functions * Preliminary sys.stderr is now set earlier to get an usable sys.stderr ealier. * Move code into _Py_Initialize_ReconfigureCore() to be able to call it from _Py_InitializeCore(). * Split _PyExc_Init(): create a new _PyBuiltins_AddExceptions() function. * Call _PyExc_Init() earlier in _Py_InitializeCore_impl() and new_interpreter() to get working exceptions earlier. * _Py_ReadyTypes() now returns _PyInitError rather than calling Py_FatalError(). * Misc code cleanup
* bpo-35713: Rework Python initialization (GH-11647)Victor Stinner2019-01-223-213/+225
| | | | | | | | | | | | | | | | | | | * The PyByteArray_Init() and PyByteArray_Fini() functions have been removed. They did nothing since Python 2.7.4 and Python 3.2.0, were excluded from the limited API (stable ABI), and were not documented. * Move "_PyXXX_Init()" and "_PyXXX_Fini()" declarations from Include/cpython/pylifecycle.h to Include/internal/pycore_pylifecycle.h. Replace "PyAPI_FUNC(TYPE)" with "extern TYPE". * _PyExc_Init() now returns an error on failure rather than calling Py_FatalError(). Move macros inside _PyExc_Init() and undefine them when done. Rewrite macros to make them look more like statement: add ";" when using them, add "do { ... } while (0)". * _PyUnicode_Init() now returns a _PyInitError error rather than call Py_FatalError(). * Move stdin check from _PySys_BeginInit() to init_sys_streams(). * _Py_ReadyTypes() now returns a _PyInitError error rather than calling Py_FatalError().
* bpo-35552: Fix reading past the end in PyUnicode_FromFormat() and ↵Serhiy Storchaka2019-01-122-6/+18
| | | | | | PyBytes_FromFormat(). (GH-11276) Format characters "%s" and "%V" in PyUnicode_FromFormat() and "%s" in PyBytes_FromFormat() no longer read memory past the limit if precision is specified.
* bpo-33817: Fix _PyBytes_Resize() for empty bytes object. (GH-11516)Serhiy Storchaka2019-01-121-0/+13
| | | | Add also tests for PyUnicode_FromFormat() and PyBytes_FromFormat() with empty result.
* bpo-35582: Argument Clinic: Optimize the "all boring objects" case. (GH-11520)Serhiy Storchaka2019-01-118-59/+109
| | | | | Use _PyArg_CheckPositional() and inlined code instead of PyArg_UnpackTuple() and _PyArg_UnpackStack() if all parameters are positional and use the "object" converter.
* bpo-35582: Argument Clinic: inline parsing code for positional parameters. ↵Serhiy Storchaka2019-01-119-58/+509
| | | | (GH-11313)
* bpo-35560: Remove assertion from format(float, "n") (GH-11288)Xtreak2019-01-071-1/+1
| | | | | Fix an assertion error in format() in debug build for floating point formatting with "n" format, zero padding and small width. Release build is not impacted. Patch by Karthikeyan Singaravelan.
* bpo-35636: Remove redundant check in unicode_hash(). (GH-11402)animalize2019-01-021-10/+1
| | | | _Py_HashBytes() does the check for empty string.
* closes bpo-35623: Fix integer overflow when sorting large lists (GH-11380)sth2019-01-021-1/+0
| | | | | There is already a `Py_ssize_t i` defined at function scope that is used for similar loops. By removing the local `int i` declaration that `i` is used, which has the appropriate type.
* bpo-33234: Simplify list_preallocate_exact() (GH-11220)Sergey Fedoseev2018-12-291-14/+3
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* bpo-23867: Argument Clinic: inline parsing code for a single positional ↵Serhiy Storchaka2018-12-257-21/+103
| | | | parameter. (GH-9689)
* Clarify the behavior of the staticmethod builtin (GH-4362)Jess Shapiro2018-12-241-2/+4
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* bpo-34193: Fix pluralization in getargs.c and test cases. (GH-8438)Xtreak2018-12-211-1/+1
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* bpo-35504: Fix segfaults and SystemErrors when deleting certain attrs. ↵Zackery Spytz2018-12-171-0/+4
| | | | (GH-11175)
* bpo-35504: Fix a SystemError when delete the characters_written attribute of ↵Serhiy Storchaka2018-12-171-0/+8
| | | | an OSError. (GH-11172)
* Remove an unused variable after bpo-35444. (GH-11117)Serhiy Storchaka2018-12-111-1/+0
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* bpo-35454: Fix miscellaneous minor issues in error handling. (#11077)Serhiy Storchaka2018-12-111-9/+9
| | | | | | * bpo-35454: Fix miscellaneous minor issues in error handling. * Fix a null pointer dereference.
* bpo-35444: Unify and optimize the helper for getting a builtin object. ↵Serhiy Storchaka2018-12-1114-60/+43
| | | | | | | | (GH-11047) This speeds up pickling of some iterators. This fixes also error handling in pickling methods when fail to look up builtin "getattr".
* bpo-35436: Add missing PyErr_NoMemory() calls and other minor bug fixes. ↵Zackery Spytz2018-12-071-1/+1
| | | | | | (GH-11015) Set MemoryError when appropriate, add missing failure checks, and fix some potential leaks.
* bpo-35365: Use a wchar_t* buffer in the code page decoder. (GH-10837)Serhiy Storchaka2018-12-041-60/+52
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* bpo-35372: Fix the code page decoder for input > 2 GiB. (GH-10848)Serhiy Storchaka2018-12-031-5/+4
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* Fix compiler warning in structseq_repr() (GH-10841)Victor Stinner2018-12-011-3/+3
| | | | | | | | | | | | Replace strncpy() with memcpy() in structseq_repr() to fix the following compiler warning: Objects/structseq.c:187:5: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-overflow=] strncpy(pbuf, typ->tp_name, len); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Objects/structseq.c:185:11: note: length computed here len = strlen(typ->tp_name) > TYPE_MAXSIZE ? TYPE_MAXSIZE : The function writes the terminating NUL byte later.
* bpo-34523, bpo-35322: Fix unicode_encode_locale() (GH-10759)Victor Stinner2018-11-281-7/+5
| | | | | | | | | Fix memory leak in PyUnicode_EncodeLocale() and PyUnicode_EncodeFSDefault() on error handling. Changes: * Fix unicode_encode_locale() error handling * Fix test_codecs.LocaleCodecTest
* bpo-33012: Fix more invalid function cast warnings with gcc 8. (GH-10751)Serhiy Storchaka2018-11-272-3/+3
| | | Fix warnings with gcc 8 for wrapperfunc <-> wrapperfunc_kwds casts.
* bpo-33029: Fix signatures of getter and setter functions. (GH-10746)Serhiy Storchaka2018-11-277-51/+56
| | | Fix also return type for few other functions (clear, releasebuffer).
* bpo-33954: Fix compiler warning in _PyUnicode_FastFill() (GH-10737)Victor Stinner2018-11-271-1/+4
| | | | | | | 'data' argument of unicode_fill() is modified, so it must not be constant. Add more assertions to unicode_fill(): check the maximum character value.
* bpo-33012: Fix invalid function cast warnings with gcc 8. (GH-6749)Serhiy Storchaka2018-11-276-23/+23
| | | | | | Fix invalid function cast warnings with gcc 8 for method conventions different from METH_NOARGS, METH_O and METH_VARARGS excluding Argument Clinic generated code.
* bpo-33012: Fix signatures of METH_NOARGS funstions. (GH-10736)Serhiy Storchaka2018-11-272-3/+3
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* bpo-33012: Fix invalid function cast warnings with gcc 8 in Argument Clinic. ↵Serhiy Storchaka2018-11-2710-66/+66
| | | | | | | | (GH-6748) Fix invalid function cast warnings with gcc 8 for method conventions different from METH_NOARGS, METH_O and METH_VARARGS in Argument Clinic generated code.
* bpo-33954: Fix _PyUnicode_InsertThousandsGrouping() (GH-10623)Victor Stinner2018-11-262-231/+200
| | | | | | | | | | | | Fix str.format(), float.__format__() and complex.__format__() methods for non-ASCII decimal point when using the "n" formatter. Changes: * Rewrite _PyUnicode_InsertThousandsGrouping(): it now requires a _PyUnicodeWriter object for the buffer and a Python str object for digits. * Rename FILL() macro to unicode_fill(), convert it to static inline function, add "assert(0 <= start);" and rework its code.
* bpo-35081: Add Include/internal/pycore_tupleobject.h (GH-10705)Victor Stinner2018-11-254-0/+4
| | | | Move _PyTuple_ITEMS() to a new header file: Include/internal/pycore_tupleobject.h
* bpo-35059: PyObject_INIT() casts to PyObject* (GH-10674)Victor Stinner2018-11-236-9/+9
| | | | | | PyObject_INIT() and PyObject_INIT_VAR() now cast their first argument to PyObject*, as done in Python 3.7. Revert partially commit b4435e20a92af474f117b78b98ddc6f515363af5.
* bpo-9263: Fix _PyObject_Dump() for freed object (#10661)Victor Stinner2018-11-221-0/+5
| | | | | | | If _PyObject_Dump() detects that the object is freed, don't try to dump it (exit immediately). Enhance also _PyObject_IsFreed(): it now detects if the pointer itself looks like freed memory.
* bpo-35059: Cast void* to PyObject* (GH-10650)Victor Stinner2018-11-221-3/+6
| | | Don't pass void* to Python macros: use _PyObject_CAST().
* bpo-35059: Cleanup usage of Python macros (GH-10648)Victor Stinner2018-11-221-1/+2
| | | | | | | | | | | | | Don't pass complex expressions but regular variables to Python macros. * _datetimemodule.c: split single large "if" into two "if" in date_new(), time_new() and datetime_new(). * _pickle.c, load_extension(): flatten complex "if" expression into more regular C code. * _ssl.c: addbool() now uses a temporary bool_obj to only evaluate the value once. * weakrefobject.c: replace "Py_INCREF(result = proxy);" with "result = proxy; Py_INCREF(result);"
* bpo-35059: Enhance _PyObject_AssertFailed() (GH-10642)Victor Stinner2018-11-211-10/+14
| | | | | | Enhance _PyObject_AssertFailed() * Exchange 'expr' and 'msg' parameters * 'expr' and 'func' arguments can now be NULL
* bpo-35081: Add Include/internal/pycore_object.h (GH-10640)Victor Stinner2018-11-2121-0/+21
| | | | Move _PyObject_GC_TRACK() and _PyObject_GC_UNTRACK() from Include/objimpl.h to Include/internal/pycore_object.h.
* bpo-35269: Fix a possible segfault involving a newly-created coroutine ↵Zackery Spytz2018-11-181-1/+1
| | | | | | | | | | | (GH-10585) coro->cr_origin wasn't initialized if compute_cr_origin() failed in PyCoro_New(), which would cause a crash during the coroutine's deallocation. https://bugs.python.org/issue35269
* bpo-34784: Implement correct cleanup in PyStructSequence new implementation ↵Pablo Galindo2018-11-151-0/+5
| | | | | | (GH-10536) PyTuple_Pack can fail and return NULL. If this happens, then PyType_FromSpecWithBases will incorrectly create a new type without bases. Also, it will crash on the Py_DECREF that follows. Also free members and type in error conditions.
* bpo-35230: dict: Remove some macros (GH-10513)INADA Naoki2018-11-141-42/+59
| | | | Remove _Py_REF_DEBUG_COMMA, DK_DEBUG_INCREF, and DK_DEBUG_DECREF. Convert DK_INCREF and DK_DECREF to static inline functions.
* bpo-35214: Fix OOB memory access in unicode escape parser (GH-10506)Gregory P. Smith2018-11-131-1/+1
| | | | | | Discovered using clang's MemorySanitizer when it ran python3's test_fstring test_misformed_unicode_character_name. An msan build will fail by simply executing: ./python -c 'u"\N"'
* bpo-34784: Fix PyStructSequence_NewType with heap-allocated StructSequence ↵Eddie Elizondo2018-11-132-96/+157
| | | | (GH-9665)
* bpo-35214: Add _Py_ prefix to MEMORY_SANITIZER def. (GH-10503)Gregory P. Smith2018-11-131-1/+1
| | | | Rename our new MEMORY_SANITIZER define to _Py_MEMORY_SANITIZER. Project based C Preprocessor namespacing at its finest. :P
* Disable getc_unlocked() with MemorySanitizer. (GH-10499)Gregory P. Smith2018-11-131-1/+2
| | | | clang's MemorySanitizer understand getc() but does not understand getc_unlocked(). Workaround: Don't use it on msan builds.
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