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* Fix for implicit tuple + default arguments, courtesy of Michael Hudson.Jeremy Hylton2001-02-191-1/+3
| | | | SF patch #103749
* When running python -O, do not include blocks defined in asserts inJeremy Hylton2001-02-191-0/+11
| | | | | | | | the symbol table pass. These blocks were already ignored by the code gen pass. Both passes must visit the same set of blocks in the same order. Fixes SF buf 132820
* Tolerate ill-formed trees in symtable_assign(). Fixes SF bug 132510.Jeremy Hylton2001-02-191-5/+8
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* Bug #132313 error message confusing for assignment in lambda.Tim Peters2001-02-181-1/+8
| | | | | | | | They're actually complaining about something more specific, an assignment in a lambda as an actual argument, so that Python parses the lambda as if it were a keyword argument. Like f(lambda x: x[0]=42). The "lambda x: x[0]" part gets parsed as if it were a keyword, being bound to 42, and the resulting error msg didn't make much sense.
* Change temp names created by listcomps from [%d] to _[%d], so the one-linerTim Peters2001-02-171-2/+2
| | | | | [k for k in dir() if k[0] != "_"] can be used to get the non-private names (used to contain "[1]").
* In symtable_update_free_vars() do not modify the dictionary whileJeremy Hylton2001-02-121-7/+27
| | | | | | | iterating over it using PyDict_Next(). This bug fix brought to you by the letters b, c, d, g, h, ... and the reporter Ping.
* SF patch 103589: Fix handling of cell vars that are either * or ** parameters.Jeremy Hylton2001-02-091-8/+15
| | | | | | (Nick Mathewson) Remove to XXX comments
* Relax the rules for using 'from ... import *' and exec in the presenceJeremy Hylton2001-02-091-297/+112
| | | | | | | | | | | | | | | | | | | 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.
* Reindent a function that was somehow indented by 7 spaces. Also did aGuido van Rossum2001-02-091-15/+15
| | | | spaces->tab conversion for fields added to struct compiling.
* Fix symbol table pass to generation SyntaxError exceptions thatJeremy Hylton2001-02-021-32/+46
| | | | include the filename and line number.
* Move a bunch of definitions that were internal to compile.c toJeremy Hylton2001-02-021-116/+96
| | | | | | | | | | | | | | | | | | 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().
* add missing DECREF (thanks, Barry)Jeremy Hylton2001-02-021-0/+1
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* Allow 'continue' inside 'try' clauseJeremy Hylton2001-02-011-8/+13
| | | | SF patch 102989 by Thomas Wouters
* Undo recent change that banned using import to bind a global, as perJeremy Hylton2001-02-011-22/+25
| | | | | | | | | | | 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
* Enforce two illegal import statements that were outlawed in theJeremy Hylton2001-01-301-44/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | reference manual but not checked: Names bound by import statemants may not occur in global statements in the same scope. The from ... import * form may only occur in a module scope. I guess these changes could break code, but the reference manual warned about them. Several other small changes If a variable is declared global in the nearest enclosing scope of a free variable, then treat it is a global in the nested scope too. Get rid of com_mangle and symtable_mangle functions and call mangle directly. If errors occur during symtable table creation, return -1 from symtable_build(). Do not increment st_errors in assignment to lambda, because exception is not set. Add extra argument to symtable_assign(); the argument, flag, is ORed with DEF_LOCAL for each symtable_add_def() call.
* plug leak detected by BarryJeremy Hylton2001-01-291-0/+1
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* PEP 227 implementationJeremy Hylton2001-01-251-312/+768
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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.
* Fix bug reported by Ka-Ping Yee: The compiler botched parsing functionJeremy Hylton2001-01-251-12/+15
| | | | | | | | | parameters that contained both anonymous tuples and *arg or **arg. Ex: def f(a, (b, c), *d): pass Fix the symtable_params() to generate names in the right order for co_varnames slot of code object. Consider *arg and **arg before the "complex" names introduced by anonymous tuples.
* Visit the initial test element of the listmaker for a listJeremy Hylton2001-01-231-1/+2
| | | | comprehension. Fixes bug reported by Tim Peters.
* prevent symtable_params() from dereferencing off the end of theJeremy Hylton2001-01-231-0/+2
| | | | varagslist node. based on fix from Thomas Wouters.
* com_init(): My entry into the smallest patch possible category.Barry Warsaw2001-01-221-1/+1
| | | | (cosmetic whitespace change).
* SF patch #103336: Missing cast.Tim Peters2001-01-201-1/+1
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* This patch introduces an extra pass to the compiler that generates aJeremy Hylton2001-01-191-284/+1036
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | symbol table for each top-level compilation unit. The information in the symbol table allows the elimination of the later optimize() pass; the bytecode generation emits the correct opcodes. The current version passes the complete regression test, but may still contain some bugs. It's a fairly substantial revision. The current code adds an assert() and a test that may lead to a Py_FatalError(). I expect to remove these before 2.1 beta 1. The symbol table (struct symtable) is described in comments in the code. The changes affects the several com_XXX() functions that were used to emit LOAD_NAME and its ilk. The primary interface for this bytecode is now com_addop_varname() which takes a kind and a name, where kind is one of VAR_LOAD, VAR_STORE, or VAR_DELETE. There are many other smaller changes: - The name mangling code is no longer contained in ifdefs. There are two functions that expose the mangling logical: com_mangle() and symtable_mangle(). - The com_error() function can accept NULL for its first argument; this is useful with is_constant_false() is called during symbol table generation. - The loop index names used by list comprehensions have been changed from __1__ to [1], so that they can not be accessed by Python code. - in com_funcdef(), com_argdefs() is now called before the body of the function is compiled. This provides consistency with com_lambdef() and symtable_funcdef(). - Helpers do_pad(), dump(), and DUMP() are added to aid in debugging the compiler.
* SF Patch #103250, by pj99: Optimize a strspn() out of startup.Guido van Rossum2001-01-191-4/+21
| | | | Minor startup speedup: avoid a call to strspn().
* Plug a memory leak in com_import_stmt(): the tuple created to hold theGuido van Rossum2000-11-271-1/+2
| | | | | | "..." in "from M import ..." was never DECREFed. Leak reported by James Slaughter and nailed by Barry, who also provided an earlier version of this patch.
* SF bug 119622: compile errors due to redundant atof decls. I don't understandTim Peters2000-11-141-1/+0
| | | | | | the bug report (for details, look at it), but agree there's no need for Python to declare atof itself: we #include stdlib.h, and ANSI C sez atof is declared there already.
* Rationalize use of limits.h, moving the inclusion to Python.h.Fred Drake2000-09-261-6/+0
| | | | | | | | Add definitions of INT_MAX and LONG_MAX to pyport.h. Remove includes of limits.h and conditional definitions of INT_MAX and LONG_MAX elsewhere. This closes SourceForge patch #101659 and bug #115323.
* com_continue_stmt(): Improve error message when continue is foundFred Drake2000-09-081-1/+22
| | | | | | in a try statement in a loop. This is related to SourceForge bug #110830.
* changed \x to consume exactly two hex digits. implements PEP-223Fredrik Lundh2000-09-021-16/+28
| | | | for 8-bit strings.
* REMOVED all CWI, CNRI and BeOpen copyright markings.Guido van Rossum2000-09-011-9/+0
| | | | This should match the situation in the 1.6b1 tree.
* Replace the run-time 'future-bytecode-stream-inspection' hack to find outThomas Wouters2000-08-271-2/+16
| | | | | | | how 'import' was called with a compiletime mechanism: create either a tuple of the import arguments, or None (in the case of a normal import), add it to the code-block constants, and load it onto the stack before calling IMPORT_NAME.
* Re-allow 'import mod.submod as s', and change its meaning to what it shouldThomas Wouters2000-08-271-2/+5
| | | | mean; the same as 'from mod import submod as s'.
* Oops, one pop too many.Thomas Wouters2000-08-271-1/+0
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* Fix allowable node-types for assignment, need to add 'listmaker'.Thomas Wouters2000-08-251-1/+1
| | | | | | | (This fix is a bit broken, just as the test already was: the test for testlist and listmaker are done always, whereas the test for exprlist and the actual abort() are only done if Py_DEBUG is defined. Suggestions welcome, I guess ;)
* Support for three-token characters (**=, >>=, <<=) which was written byThomas Wouters2000-08-241-33/+188
| | | | | Michael Hudson, and support in general for the augmented assignment syntax. The graminit.c patch is large!
* Charles G. Waldman <cgw@fnal.gov>:Fred Drake2000-08-241-2/+32
| | | | | | | | | Add the EXTENDED_ARG opcode to the virtual machine, allowing 32-bit arguments to opcodes instead of being forced to stick to the 16-bit limit. This is especially useful for machine-generated code, which can be too long for the SET_LINENO parameter to fit into 16 bits. This closes the implementation portion of SourceForge patch #100893.
* require list comprehensions to start with a for clauseSkip Montanaro2000-08-221-4/+4
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* com_print_stmt(): Guido rightly points out that the stream expressionBarry Warsaw2000-08-211-5/+22
| | | | | in extended prints should only be evaluated once. This patch plays stack games (documented!) to fix this.
* PEP 214, Extended print Statement, has been accepted by the BDFL.Barry Warsaw2000-08-211-8/+36
| | | | | | com_print_stmt(): Implement recognition of, and byte compilation for, extended print using new byte codes PRINT_ITEM_TO and PRINT_NEWLINE_TO.
* Disallow "import mod.submod as m", because the result is ambiguous. Does itThomas Wouters2000-08-191-1/+2
| | | | | | | | | | load mod.submod as m, or mod as m ? Both can be achieved differently, and unambiguously. Also attempt to document this restriction (editor appreciated!) Note that this is an artificial check during compile, because incorporating this in the grammar is hard, and then adjusting the compiler to do the right thing with the right nodes is harder.
* com_error(): Quiet gcc -Wall warning.Barry Warsaw2000-08-181-1/+0
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* Apply SF patch #101135, adding 'import module as m' and 'from module importThomas Wouters2000-08-171-6/+38
| | | | | | | | name as n'. By doing some twists and turns, "as" is not a reserved word. There is a slight change in semantics for 'from module import name' (it will now honour the 'global' keyword) but only in cases that are explicitly undocumented.
* Fix new compiler warnings. Unused var in compile.c. Argsize mismatchesTim Peters2000-08-151-1/+0
| | | | | | in binascii.c (only on platforms with signed chars -- although Py_CHARMASK is documented as returning an int, it only does so on platforms with signed chars).
* Remove the osdefs.h #include; it was not needed in the final version ofFred Drake2000-08-151-1/+0
| | | | my last set of changes.
* When raising a SyntaxError, make a best-effort attempt to set theFred Drake2000-08-151-9/+29
| | | | | | | | | | filename and lineno attributes, but do not mask the SyntaxError if we fail. This is part of what is needed to close SoruceForge bug #110628 (Jitterbug PR#278). Wrap a long line to fit in under 80 columns.
* The list comp patch checked for the second child node of the 'listmaker'Thomas Wouters2000-08-131-1/+1
| | | | | node, without checking if the node actually had more than one child. It can have only one node, though: '[' test ']'. This fixes it.
* The list comprehensions patch partly reversed the removal of UNPACK_LIST,Thomas Wouters2000-08-121-13/+0
| | | | re-introducing com_assign_list, now unused. Removed it.
* list comprehensions. seeSkip Montanaro2000-08-121-14/+129
| | | | | | http://sourceforge.net/patch/?func=detailpatch&patch_id=100654&group_id=5470 for details.
* Merge UNPACK_LIST and UNPACK_TUPLE into a single UNPACK_SEQUENCE, since theyThomas Wouters2000-08-111-18/+5
| | | | | | | did the same anyway. I'm not sure what to do with Tools/compiler/compiler/* -- that isn't part of distutils, is it ? Should it try to be compatible with old bytecode version ?
* When returning an error from jcompile() (which is passed through byGuido van Rossum2000-08-071-0/+8
| | | | | PyNode_Compile()), make sure that an exception is actually set -- otherwise someone stomped on our error. [2.0 checkin of this fix.]
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