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* This patch originated from an idea by Martin v. Loewis who submitted aMarc-André Lemburg2001-04-231-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | patch for sharing single character Unicode objects. Martin's patch had to be reworked in a number of ways to take Unicode resizing into consideration as well. Here's what the updated patch implements: * Single character Unicode strings in the Latin-1 range are shared (not only ASCII chars as in Martin's original patch). * The ASCII and Latin-1 codecs make use of this optimization, providing a noticable speedup for single character strings. Most Unicode methods can use the optimization as well (by virtue of using PyUnicode_FromUnicode()). * Some code cleanup was done (replacing memcpy with Py_UNICODE_COPY) * The PyUnicode_Resize() can now also handle the case of resizing unicode_empty which previously resulted in an error. * Modified the internal API _PyUnicode_Resize() and the public PyUnicode_Resize() API to handle references to shared objects correctly. The _PyUnicode_Resize() signature changed due to this. * Callers of PyUnicode_FromUnicode() may now only modify the Unicode object contents of the returned object in case they called the API with NULL as content template. Note that even though this patch passes the regression tests, there may still be subtle bugs in the sharing code.
* Mondo changes to the iterator stuff, without changing how Python codeGuido van Rossum2001-04-233-3/+18
| | | | | | | | | | | | | | | | | | | | | | | | sees it (test_iter.py is unchanged). - Added a tp_iternext slot, which calls the iterator's next() method; this is much faster for built-in iterators over built-in types such as lists and dicts, speeding up pybench's ForLoop with about 25% compared to Python 2.1. (Now there's a good argument for iterators. ;-) - Renamed the built-in sequence iterator SeqIter, affecting the C API functions for it. (This frees up the PyIter prefix for generic iterator operations.) - Added PyIter_Check(obj), which checks that obj's type has a tp_iternext slot and that the proper feature flag is set. - Added PyIter_Next(obj) which calls the tp_iternext slot. It has a somewhat complex return condition due to the need for speed: when it returns NULL, it may not have set an exception condition, meaning the iterator is exhausted; when the exception StopIteration is set (or a derived exception class), it means the same thing; any other exception means some other error occurred.
* Adding iterobject.[ch], which were accidentally not added. Sorry\!Guido van Rossum2001-04-201-0/+13
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* Iterators phase 1. This comprises:Guido van Rossum2001-04-205-4/+19
| | | | | | | | | | | | | | | | | | | | | | new slot tp_iter in type object, plus new flag Py_TPFLAGS_HAVE_ITER new C API PyObject_GetIter(), calls tp_iter new builtin iter(), with two forms: iter(obj), and iter(function, sentinel) new internal object types iterobject and calliterobject new exception StopIteration new opcodes for "for" loops, GET_ITER and FOR_ITER (also supported by dis.py) new magic number for .pyc files new special method for instances: __iter__() returns an iterator iteration over dictionaries: "for x in dict" iterates over the keys iteration over files: "for x in file" iterates over lines TODO: documentation test suite decide whether to use a different way to spell iter(function, sentinal) decide whether "for key in dict" is a good idea use iterators in map/filter/reduce, min/max, and elsewhere (in/not in?) speed tuning (make next() a slot tp_next???)
* Change the version to 2.2a0. This may look strange, but indicatesGuido van Rossum2001-04-181-4/+4
| | | | it's 2.2 before the first alpha release.
* Update the version to 2.1final (again :-).Guido van Rossum2001-04-161-4/+4
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* We need another release candidate after so many "small" changes.Guido van Rossum2001-04-161-2/+2
| | | | DO NOT CHECK ANYTHHING IN FROM NOW ON WITHOUT ASKING ME.
* Prepare for release candidate 1... aka 2.1c1.Guido van Rossum2001-04-121-3/+3
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* Add the necessary field for weak reference support to the function andFred Drake2001-03-232-0/+2
| | | | method types.
* Add sys.excepthook.Ka-Ping Yee2001-03-231-0/+1
| | | | | | | | Update docstring and library reference section on 'sys' module. New API PyErr_Display, just for displaying errors, called by excepthook. Uncaught exceptions now call sys.excepthook; if that fails, we fall back to calling PyErr_Display directly. Also comes with sys.__excepthook__ and sys.__displayhook__.
* A small change to the C API for weakly-referencable types: Such typesFred Drake2001-03-221-5/+1
| | | | | | | | must now initialize the extra field used by the weak-ref machinery to NULL themselves, to avoid having to require PyObject_INIT() to check if the type supports weak references and do it there. This causes less work to be done for all objects (the type object does not need to be consulted to check for the Py_TPFLAGS_HAVE_WEAKREFS bit).
* Set the line number correctly for a nested function with an exec orJeremy Hylton2001-03-221-0/+1
| | | | import *. Mark the offending stmt rather than the function def line.
* Extend support for from __future__ import nested_scopesJeremy Hylton2001-03-221-0/+13
| | | | | | | | | | | | | | | | | | | If a module has a future statement enabling nested scopes, they are also enable for the exec statement and the functions compile() and execfile() if they occur in the module. If Python is run with the -i option, which enters interactive mode after executing a script, and the script it runs enables nested scopes, they are also enabled in interactive mode. XXX The use of -i with -c "from __future__ import nested_scopes" is not supported. What's the point? To support these changes, many function variants have been added to pythonrun.c. All the variants names end with Flags and they take an extra PyCompilerFlags * argument. It is possible that this complexity will be eliminated in a future version of the interpreter in which nested scopes are not optional.
* If a code object is compiled with nested scopes, define the CO_NESTED flag.Jeremy Hylton2001-03-222-0/+2
| | | | | Add PyEval_GetNestedScopes() which returns a non-zero value if the code for the current interpreter frame has CO_NESTED defined.
* Move the code implementing isinstance() and issubclass() to new CGuido van Rossum2001-03-211-0/+7
| | | | | APIs, PyObject_IsInstance() and PyObject_IsSubclass() -- both returning an int, or -1 for errors.
* Bump version to 2.1b2.Guido van Rossum2001-03-201-3/+3
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* Variety of small INC/DECREF patches that fix reported memory leaksJeremy Hylton2001-03-131-2/+1
| | | | | | | | | | | | | | | | | | | | | with free variables. Thanks to Martin v. Loewis for finding two of the problems. This fixes SF buf 405583. There is also a C API change: PyFrame_New() is reverting to its pre-2.1 signature. The change introduced by nested scopes was a mistake. XXX Is this okay between beta releases? cell_clear(), the GC helper, must decref its reference to break cycles. frame_dealloc() must dealloc all cell vars and free vars in addition to locals. eval_code2() setup code must INCREF cells it copies out of the closure. The STORE_DEREF opcode implementation must DECREF the object it passes to PyCell_Set().
* RISCOS patch by dschwertbergerGuido van Rossum2001-03-021-0/+7
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* Useful future statement support for the interactive interpreterJeremy Hylton2001-03-012-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | (Also remove warning about module-level global decl, because we can't distinguish from code passed to exec.) Define PyCompilerFlags type contains a single element, cf_nested_scopes, that is true if a nested scopes future statement has been entered at the interactive prompt. New API functions: PyNode_CompileFlags() PyRun_InteractiveOneFlags() -- same as their non Flags counterparts except that the take an optional PyCompilerFlags pointer compile.c: In jcompile() use PyCompilerFlags argument. If cf_nested_scopes is true, compile code with nested scopes. If it is false, but the code has a valid future nested scopes statement, set it to true. pythonrun.c: Create a new PyCompilerFlags object in PyRun_InteractiveLoop() and thread it through to PyRun_InteractiveOneFlags().
* Here we go again, another round of version bumping...Guido van Rossum2001-03-011-4/+4
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* add DEF_BOUNDJeremy Hylton2001-02-281-1/+3
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* Add declaration for PyErr_WarnExplicit().Guido van Rossum2001-02-281-0/+2
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* Improve SyntaxErrors for bad future statements. Set file and locationJeremy Hylton2001-02-281-0/+4
| | | | | | | for errors raised in future.c. Move some helper functions from compile.c to errors.c and make them API functions: PyErr_SyntaxLocation() and PyErr_ProgramText().
* Presumed correct compiler pass for future statementsJeremy Hylton2001-02-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | XXX still need to integrate into symtable API compile.h: Remove ff_n_simple_stmt; obsolete. Add ff_found_docstring used internally to skip one and only one string at the beginning of a module. compile.c: Add check for from __future__ imports to far into the file. In symtable_global() check for -1 returned from symtable_lookup(), which signifies name not defined. Add missing DECERF in symtable_add_def. Free c->c_future. future.c: Add special handling for multiple statements joined on a single line using one or more semicolons; this form can include an illegal future statement that would otherwise be hard to detect. Add support for detecting and skipping doc strings.
* Improved __future__ parser; still more to doJeremy Hylton2001-02-272-3/+14
| | | | | | | | | | | | | | | Makefile.pre.in: add target future.o Include/compile.h: define PyFutureFeaters and PyNode_Future() add c_future slot to struct compiling Include/symtable.h: add st_future slot to struct symtable Python/future.c: implementation of PyNode_Future() Python/compile.c: use PyNode_Future() for nested_scopes support Python/symtable.c: include compile.h to pick up PyFutureFeatures decl
* Add Vladimir Marangozov's object allocator. It is disabled by default. ThisNeil Schemenauer2001-02-271-0/+7
| | | | closes SF patch #401229.
* Preliminary support for future nested scopesJeremy Hylton2001-02-272-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | compile.h: #define NESTED_SCOPES_DEFAULT 0 for Python 2.1 __future__ feature name: "nested_scopes" symtable.h: Add st_nested_scopes slot. Define flags to track exec and import star. Lib/test/test_scope.py: requires nested scopes compile.c: Fiddle with error messages. Reverse the sense of ste_optimized flag on PySymtableEntryObjects. If it is true, there is an optimization conflict. Modify get_ref_type to respect st_nested_scopes flags. Refactor symtable_load_symbols() into several smaller functions, which use struct symbol_info to share variables. In new function symtable_update_flags(), raise an error or warning for import * or bare exec that conflicts with nested scopes. Also, modify handle for free variables to respect st_nested_scopes flag. In symtable_init() assign st_nested_scopes flag to NESTED_SCOPES_DEFAULT (defined in compile.h). Add preliminary and often incorrect implementation of symtable_check_future(). Add symtable_lookup() helper for future use.
* The return value from PyObject_ClearWeakRefs() is no longer meaningful,Fred Drake2001-02-261-1/+1
| | | | so make it void.
* _Py_ReleaseInternedStrings(): Private API function to decref andBarry Warsaw2001-02-231-0/+2
| | | | | | release the interned string dictionary. This is useful for memory use debugging because it eliminates a huge source of noise from the reports. Only defined when INTERN_STRINGS is defined.
* Relax the rules for using 'from ... import *' and exec in the presenceJeremy Hylton2001-02-091-37/+27
| | | | | | | | | | | | | | | | | | | of nested functions. Either is allowed in a function if it contains no defs or lambdas or the defs and lambdas it contains have no free variables. If a function is itself nested and has free variables, either is illegal. Revise the symtable to use a PySymtableEntryObject, which holds all the revelent information for a scope, rather than using a bunch of st_cur_XXX pointers in the symtable struct. The changes simplify the internal management of the current symtable scope and of the stack. Added new C source file: Python/symtable.c. (Does the Windows build process need to be updated?) As part of these changes, the initial _symtable module interface introduced in 2.1a2 is replaced. A dictionary of PySymtableEntryObjects are returned.
* Superseded by $(srcdir)/Makefile.pre.in.Neil Schemenauer2001-02-031-12/+0
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* bump to 2.1a2Jeremy Hylton2001-02-021-3/+3
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* Fix symbol table pass to generation SyntaxError exceptions thatJeremy Hylton2001-02-021-0/+1
| | | | include the filename and line number.
* Move a bunch of definitions that were internal to compile.c toJeremy Hylton2001-02-022-0/+100
| | | | | | | | | | | | | | | | | | symtable.h, so that they can be used by external module. Improve error handling in symtable_enter_scope(), which return an error code that went unchecked by most callers. XXX The error handling in symtable code is sloppy in general. Modify symtable to record the line number that begins each scope. This can help to identify which code block is being referred to when multiple blocks are bound to the same name. Add st_scopes dict that is used to preserve scope info when PyNode_CompileSymtable() is called. Otherwise, this information is tossed as soon as it is no longer needed. Add Py_SymtableString() to pythonrun; analogous to Py_CompileString().
* Use a type flag to determine the applicability of the tp_weaklistoffsetFred Drake2001-02-022-1/+10
| | | | | field. This should avoid binary incompatibility problems with older modules that have not been recompiled.
* Allow 'continue' inside 'try' clauseJeremy Hylton2001-02-011-0/+1
| | | | SF patch 102989 by Thomas Wouters
* Undo recent change that banned using import to bind a global, as perJeremy Hylton2001-02-011-0/+3
| | | | | | | | | | | discussion on python-dev. 'from mod import *' is still banned except at the module level. Fix value for special NOOPT entry in symtable. Initialze to 0 instead of None, so that later uses of PyInt_AS_LONG() are valid. (Bug reported by Donn Cave.) replace local REPR macros with PyObject_REPR in object.h
* PEP 205, Weak References -- initial checkin.Fred Drake2001-02-013-4/+17
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* Remove f_closure slot of frameobject and use f_localsplus instead.Jeremy Hylton2001-01-291-1/+3
| | | | | | | | | | | | This change eliminates an extra malloc/free when a frame with free variables is created. Any cell vars or free vars are stored in f_localsplus after the locals and before the stack. eval_code2() fills in the appropriate values after handling initialization of locals. To track the size the frame has an f_size member that tracks the total size of f_localsplus. It used to be implicitly f_nlocals + f_stacksize.
* Added prototype for PyInstance_NewRaw().Fred Drake2001-01-281-0/+1
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* It's unclear whether PyMarshal_XXX() are part of the public or private API.Tim Peters2001-01-281-0/+1
| | | | | | | | | | They're named as if public, so I did a Bad Thing by changing PyMarshal_ReadObjectFromFile() to suck up the remainder of the file in one gulp: anyone who counted on that leaving the file pointer merely at the end of the next object would be screwed. So restored PyMarshal_ReadObjectFromFile() to its earlier state, renamed the new greedy code to PyMarshal_ReadLastObjectFromFile(), and changed Python internals to call the latter instead.
* The addition of new parameters to functions in the Python/C API requiresFred Drake2001-01-251-2/+5
| | | | that PYTHON_API_VERSION be incremented.
* PEP 227 implementationJeremy Hylton2001-01-254-7/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The majority of the changes are in the compiler. The mainloop changes primarily to implement the new opcodes and to pass a function's closure to eval_code2(). Frames and functions got new slots to hold the closure. Include/compile.h Add co_freevars and co_cellvars slots to code objects. Update PyCode_New() to take freevars and cellvars as arguments Include/funcobject.h Add func_closure slot to function objects. Add GetClosure()/SetClosure() functions (and corresponding macros) for getting at the closure. Include/frameobject.h PyFrame_New() now takes a closure. Include/opcode.h Add four new opcodes: MAKE_CLOSURE, LOAD_CLOSURE, LOAD_DEREF, STORE_DEREF. Remove comment about old requirement for opcodes to fit in 7 bits. compile.c Implement changes to code objects for co_freevars and co_cellvars. Modify symbol table to use st_cur_name (string object for the name of the current scope) and st_cur_children (list of nested blocks). Also define st_nested, which might more properly be called st_cur_nested. Add several DEF_XXX flags to track def-use information for free variables. New or modified functions of note: com_make_closure(struct compiling *, PyCodeObject *) Emit LOAD_CLOSURE opcodes as needed to pass cells for free variables into nested scope. com_addop_varname(struct compiling *, int, char *) Emits opcodes for LOAD_DEREF and STORE_DEREF. get_ref_type(struct compiling *, char *name) Return NAME_CLOSURE if ref type is FREE or CELL symtable_load_symbols(struct compiling *) Decides what variables are cell or free based on def-use info. Can now raise SyntaxError if nested scopes are mixed with exec or from blah import *. make_scope_info(PyObject *, PyObject *, int, int) Helper functions for symtable scope stack. symtable_update_free_vars(struct symtable *) After a code block has been analyzed, it must check each of its children for free variables that are not defined in the block. If a variable is free in a child and not defined in the parent, then it is defined by block the enclosing the current one or it is a global. This does the right logic. symtable_add_use() is now a macro for symtable_add_def() symtable_assign(struct symtable *, node *) Use goto instead of for (;;) Fixed bug in symtable where name of keyword argument in function call was treated as assignment in the scope of the call site. Ex: def f(): g(a=2) # a was considered a local of f ceval.c eval_code2() now take one more argument, a closure. Implement LOAD_CLOSURE, LOAD_DEREF, STORE_DEREF, MAKE_CLOSURE> Also: When name error occurs for global variable, report that the name was global in the error mesage. Objects/frameobject.c Initialize f_closure to be a tuple containing space for cellvars and freevars. f_closure is NULL if neither are present. Objects/funcobject.c Add support for func_closure. Python/import.c Change the magic number. Python/marshal.c Track changes to code objects.
* PEP 227 implementationJeremy Hylton2001-01-252-0/+29
| | | | | | A cell contains a reference to a single PyObject. It could be implemented as a mutable, one-element sequence, but the separate type has less overhead.
* Add a flag to indicate the presence of the tp_richcompare field, andGuido van Rossum2001-01-241-2/+7
| | | | add it to the default flags.
* PyGC_Dump() -> _PyGC_Dump()Barry Warsaw2001-01-241-1/+1
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* PyObject_Dump() -> _PyObject_Dump()Barry Warsaw2001-01-241-1/+1
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* Add prototype for PyGC_Dump() -- but only inside the #ifdefBarry Warsaw2001-01-231-0/+2
| | | | WITH_CYCLE_GC.
* Add prototype for PyObject_Dump().Barry Warsaw2001-01-231-0/+1
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* Add a new API, PyThreadState_DeleteCurrent() that combinesGuido van Rossum2001-01-231-0/+3
| | | | | PyThreadState_Delete() and PyEval_ReleaseLock(). It is only defined if WITH_THREAD is defined.
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