PKúS&8“×2EGG-INFO/dependency_links.txt PKúS&87SäBEGG-INFO/namespace_packages.txtpeak peak.util PKúS&8P¾ Á22EGG-INFO/PKG-INFOMetadata-Version: 1.0 Name: BytecodeAssembler Version: 0.3 Summary: Generate Python code objects by "assembling" bytecode (Now includes a functional/AST-oriented API, too!) Home-page: http://pypi.python.org/pypi/BytecodeAssembler Author: Phillip J. Eby Author-email: peak@eby-sarna.com License: PSF or ZPL Description: ``peak.util.assembler`` is a simple bytecode assembler module that handles most low-level bytecode generation details like jump offsets, stack size tracking, line number table generation, constant and variable name index tracking, etc. That way, you can focus your attention on the desired semantics of your bytecode instead of on these mechanical issues. In addition to a low-level opcode-oriented API for directly generating specific Python bytecodes, this module also offers an extensible mini-AST framework for generating code from high-level specifications. This framework does most of the work needed to transform tree-like structures into linear bytecode instructions, and includes the ability to do compile-time constant folding. Please see the `BytecodeAssembler reference manual`_ for more details. .. _BytecodeAssembler reference manual: http://peak.telecommunity.com/DevCenter/BytecodeAssembler#toc Changes since version 0.2: * Added ``Suite``, ``TryExcept``, and ``TryFinally`` node types * Added a ``Getattr`` node type that does static or dynamic attribute access and constant folding * Fixed ``code.from_function()`` not copying the ``co_filename`` attribute when ``copy_lineno`` was specified. * The ``repr()`` of AST nodes doesn't include a trailing comma for 1-argument node types any more. * Added a ``Pass`` symbol that generates no code, a ``Compare()`` node type that does n-way comparisons, and ``And()`` and ``Or()`` node types for doing logical operations. * The ``COMPARE_OP()`` method now accepts operator strings like ``"<="``, ``"not in"``, ``"exception match"``, and so on, as well as numeric opcodes. See the standard library's ``opcode`` module for a complete list of the strings accepted (in the ``cmp_op`` tuple). ``"<>"`` is also accepted as an alias for ``"!="``. * Added code to verify that forward jump offsets don't exceed a 64KB span, and support absolute backward jumps to locations >64KB. Changes since version 0.1: * Constant handling has been fixed so that it doesn't confuse equal values of differing types (e.g. ``1.0`` and ``True``), or equal unhashable objects (e.g. two empty lists). * Removed ``nil``, ``ast_curry()`` and ``folding_curry()``, replacing them with the ``nodetype()`` decorator and ``fold_args()``; please see the docs for more details. * Added stack tracking across jumps, globally verifying stack level prediction consistency and automatically rejecting attempts to generate dead code. It should now be virtually impossible to accidentally generate bytecode that can crash the interpreter. (If you find a way, let me know!) Changes since version 0.0.1: * Added massive quantities of new documentation and examples * Full block, loop, and closure support * High-level functional code generation from trees, with smart labels and blocks, constant folding, extensibility, smart local variable names, etc. * The ``.label()`` method was renamed to ``.here()`` to distinguish it from the new smart ``Label`` objects. * Docs and tests were moved to README.txt instead of assembler.txt * Added a demo that implements a "switch"-like statement template that shows how to extend the code generation system and how to abuse ``END_FINALLY`` to implement a "computed goto" in bytecode. * Various bug fixes There are a few features that aren't tested yet, and not all opcodes may be fully supported. Also note the following limitations: * Jumps to as-yet-undefined labels cannot span a distance greater than 65,535 bytes. * The ``dis()`` module in Python 2.3 has a bug that makes it show incorrect line numbers when the difference between two adjacent line numbers is greater than 255. This causes two shallow failures in the current test suite when it's run under Python 2.3. (And there are two other expected failures under Python 2.3 due to an automatic optimization.) If you find any other issues, please let me know. Please also keep in mind that this is a work in progress, and the API may change if I come up with a better way to do something. Questions and discussion regarding this software should be directed to the `PEAK Mailing List `_. .. _toc: Platform: UNKNOWN PKúS&8M0x¥##EGG-INFO/requires.txtDecoratorTools>=1.2 SymbolType>=1.0PKúS&8¦,üû””EGG-INFO/SOURCES.txtREADME.txt setup.cfg setup.py test_assembler.py BytecodeAssembler.egg-info/PKG-INFO BytecodeAssembler.egg-info/SOURCES.txt BytecodeAssembler.egg-info/dependency_links.txt BytecodeAssembler.egg-info/namespace_packages.txt BytecodeAssembler.egg-info/requires.txt BytecodeAssembler.egg-info/top_level.txt ez_setup/README.txt ez_setup/__init__.py peak/__init__.py peak/util/__init__.py peak/util/assembler.pyPKúS&8†êÁEGG-INFO/top_level.txtpeak PKúS&8“×2EGG-INFO/zip-safe PK/·4‰kÔ<99peak/__init__.py__import__('pkg_resources').declare_namespace(__name__) PKúS&8M|ÍÍpeak/__init__.pyc;ò ûŠrDc@sedƒieƒdS(s pkg_resourcesN(s __import__sdeclare_namespaces__name__(((s&build\bdist.win32\egg\peak\__init__.pys?sPKúS&8M|ÍÍpeak/__init__.pyo;ò ûŠrDc@sedƒieƒdS(s pkg_resourcesN(s __import__sdeclare_namespaces__name__(((s&build\bdist.win32\egg\peak\__init__.pys?sPKiR&8f9j1!i!ipeak/util/assembler.pyfrom array import array from dis import * from new import code, function from types import CodeType from peak.util.symbols import Symbol __all__ = [ 'Code', 'Const', 'Return', 'Global', 'Local', 'Call', 'const_value', 'NotAConstant', 'Label', 'fold_args', 'nodetype', 'Node', 'Pass', 'Compare', 'And', 'Or', 'Getattr', 'TryExcept', 'TryFinally', 'Suite', ] opcode = {} for op in range(256): name=opname[op] if name.startswith('<'): continue if name.endswith('+0'): opcode[name[:-2]]=op opcode[name]=op globals().update(opcode) # opcodes are now importable at will # Flags from code.h CO_OPTIMIZED = 0x0001 # use LOAD/STORE_FAST instead of _NAME CO_NEWLOCALS = 0x0002 # only cleared for module/exec code CO_VARARGS = 0x0004 CO_VARKEYWORDS = 0x0008 CO_NESTED = 0x0010 # ??? CO_GENERATOR = 0x0020 CO_NOFREE = 0x0040 # set if no free or cell vars CO_GENERATOR_ALLOWED = 0x1000 # unused CO_FUTURE_DIVISION = 0x2000 CO_FUTURE_ABSOLUTE_IMPORT = 0x4000 # Python 2.5+ only CO_FUTURE_WITH_STATEMENT = 0x8000 # Python 2.5+ only __all__.extend([k for k in globals().keys() if k.startswith('CO_')]) class Const(object): """Wrapper to ensure constants are hashable even if mutable""" __slots__ = 'value', 'hash', 'hashable' def __init__(self, value): self.value = value try: self.hash = hash(value) except TypeError: self.hash = hash(id(value)) self.hashable = False else: self.hashable = True def __repr__(self): return "Const(%s)" % repr(self.value) def __hash__(self): return self.hash def __eq__(self, other): if type(other) is not Const: return False if self.hashable: return self.value == other.value else: return self.value is other.value def __ne__(self, other): return not self==other def __call__(self, code): code.LOAD_CONST(self.value) class Node(tuple): """Base class for AST nodes""" __slots__ = [] def nodetype(*mixins, **kw): def callback(frame, name, func, old_locals): def __new__(cls, *args, **kw): result = func(*args, **kw) if type(result) is tuple: return tuple.__new__(cls, (cls,)+result) else: return result def __repr__(self): r = self.__class__.__name__ + tuple.__repr__(self[1:]) if len(self)==2: return r[:-2]+')' # nix trailing ',' return r def __call__(self, code): return func(*(self[1:]+(code,))) import inspect args = inspect.getargspec(func)[0] d = dict( __new__ = __new__, __repr__ = __repr__, __doc__=func.__doc__, __module__ = func.__module__, __args__ = args, __slots__ = [], __call__ = __call__ ) for p,a in enumerate(args[:-1]): # skip 'code' argument if isinstance(a,str): d[a] = property(lambda self, p=p+1: self[p]) d.update(kw) return type(name, mixins+(Node,), d) from peak.util.decorators import decorate_assignment return decorate_assignment(callback) nodetype() def Global(name, code=None): if code is None: return name, code.LOAD_GLOBAL(name) nodetype() def Local(name, code=None): if code is None: return name, if name in code.co_cellvars or name in code.co_freevars: return code.LOAD_DEREF(name) elif code.co_flags & CO_OPTIMIZED: return code.LOAD_FAST(name) else: return code.LOAD_NAME(name) nodetype() def Return(value=None, code=None): if code is None: return value, return code(value, Code.RETURN_VALUE) class _Pass(Symbol): def __call__(self, code=None): pass def __nonzero__(self): return False Pass = _Pass('Pass', __name__) nodetype() def Getattr(ob, name, code=None): try: name = const_value(name) except NotAConstant: return Call(Const(getattr), [ob, name]) if code is None: return fold_args(Getattr, ob, name) code(ob) code.LOAD_ATTR(name) nodetype() def Call(func, args=(),kwargs=(), star=None,dstar=None, fold=True, code=None): if code is None: data = ( func, tuple(args), tuple(kwargs), star or (), dstar or (), fold ) if fold and (args or kwargs or star or dstar): return fold_args(Call, *data) else: return data code(func, *args) for k,v in kwargs: code(k,v) argc = len(args) kwargc = len(kwargs) if star: if dstar: code(star, dstar) return code.CALL_FUNCTION_VAR_KW(argc, kwargc) else: code(star) return code.CALL_FUNCTION_VAR(argc, kwargc) else: if dstar: code(dstar) return code.CALL_FUNCTION_KW(argc, kwargc) else: return code.CALL_FUNCTION(argc, kwargc) nodetype() def TryExcept(body, handlers, else_=Pass, code=None): if code is None: return body, tuple(handlers), else_ okay = Label() done = Label() code( okay.SETUP_EXCEPT, body, okay.POP_BLOCK ) for typ, handler in handlers: next_test = Label() Compare(Code.DUP_TOP, [('exception match', typ)], code) code( next_test.JUMP_IF_FALSE, Code.POP_TOP, # remove condition Code.POP_TOP, Code.POP_TOP, Code.POP_TOP, # remove exc info handler ) if code.stack_size is not None: code(done.JUMP_FORWARD) code(next_test, Code.POP_TOP) # remove condition code(Code.END_FINALLY) code.stack_unknown() # force stack level to come from end of body code(okay, else_, done) nodetype() def Suite(body, code=None): if code is None: if body: return tuple(body), return Pass code(*body) nodetype() def TryFinally(body, handler, code=None): if code is None: return body, handler code( Code.SETUP_FINALLY, body, Code.POP_BLOCK, handler, Code.END_FINALLY ) nodetype() def Compare(expr, ops, code=None): if code is None: return fold_args(Compare, expr, tuple(ops)) if len(ops)==1: op, arg = ops[0] code(expr, arg) return code.COMPARE_OP(op) fail = Label() finish = Label() code(expr) for op, arg in ops[:-1]: code(arg) code.DUP_TOP() code.ROT_THREE() code.COMPARE_OP(op) fail.JUMP_IF_FALSE(code) code.POP_TOP() op, arg = ops[-1] code(arg) code.COMPARE_OP(op) finish.JUMP_FORWARD(code) fail(code) code.ROT_TWO() code.POP_TOP() return finish(code) nodetype() def And(values, code=None): if code is None: return fold_args(And, tuple(values)) end = Label() for value in values[:-1]: try: if const_value(value): continue # true constants can be skipped except NotAConstant: # but non-constants require code code(value, end.JUMP_IF_FALSE, Code.POP_TOP) else: # and false constants end the chain right away return code(value, end) code(values[-1], end) nodetype() def Or(values, code=None): if code is None: return fold_args(Or, tuple(values)) end = Label() for value in values[:-1]: try: if not const_value(value): continue # false constants can be skipped except NotAConstant: # but non-constants require code code(value, end.JUMP_IF_TRUE, Code.POP_TOP) else: # and true constants end the chain right away return code(value, end) code(values[-1], end) def with_name(f, name): try: f.__name__=name return f except (TypeError,AttributeError): return function( f.func_code, f.func_globals, name, f.func_defaults, f.func_closure ) class Label(object): """A forward-referenceable location in a ``Code`` object""" __slots__ = 'backpatches', 'resolution' def __init__(self): self.backpatches = [] self.resolution = None def SETUP_EXCEPT(self, code): code.SETUP_EXCEPT(); self.backpatches.append(code.blocks[-1][-1]) def SETUP_FINALLY(self, code): code.SETUP_FINALLY(); self.backpatches.append(code.blocks[-1][-1]) def SETUP_LOOP(self, code): code.SETUP_LOOP(); self.backpatches.append(code.blocks[-1][-1]) def POP_BLOCK(self, code): self.backpatches[0] = code.POP_BLOCK() for op in hasjrel+hasjabs: if opname[op] not in locals(): def do_jump(self, code, op=op): method = getattr(code, opname[op]) if self.resolution is None: return self.backpatches.append(method()) else: return method(self.resolution) locals()[opname[op]] = with_name(do_jump, opname[op]) del do_jump def __call__(self, code): if self.resolution is not None: raise AssertionError("Label previously defined") self.resolution = resolution = len(code.co_code) for p in self.backpatches: if p: p() class Code(object): co_argcount = 0 co_stacksize = 0 co_flags = CO_OPTIMIZED | CO_NEWLOCALS # typical usage co_filename = '' co_name = '' co_firstlineno = 0 co_freevars = () co_cellvars = () _last_lineofs = 0 _ss = 0 def __init__(self): self.co_code = array('B') self.co_consts = [None] self.co_names = [] self.co_varnames = [] self.co_lnotab = array('B') self.emit = self.co_code.append self.blocks = [] self.stack_history = [] def emit_arg(self, op, arg): emit = self.emit if arg>0xFFFF: emit(EXTENDED_ARG) emit((arg>>16)&255) emit((arg>>24)&255) emit(op) emit(arg&255) emit((arg>>8)&255) def set_lineno(self, lno): if not self.co_firstlineno: self.co_firstlineno = self._last_line = lno return append = self.co_lnotab.append incr_line = lno - self._last_line incr_addr = len(self.co_code) - self._last_lineofs if not incr_line: return assert incr_addr>=0 and incr_line>=0 while incr_addr>255: append(255) append(0) incr_addr -= 255 while incr_line>255: append(incr_addr) append(255) incr_line -= 255 incr_addr = 0 if incr_addr or incr_line: append(incr_addr) append(incr_line) self._last_line = lno self._last_lineofs = len(self.co_code) def LOAD_CONST(self, const): self.stackchange((0,1)) pos = 0 hashable = True try: hash(const) except TypeError: hashable = False while 1: try: arg = self.co_consts.index(const, pos) it = self.co_consts[arg] except ValueError: arg = len(self.co_consts) self.co_consts.append(const) break else: if type(it) is type(const) and (hashable or it is const): break pos = arg+1 continue return self.emit_arg(LOAD_CONST, arg) def CALL_FUNCTION(self, argc=0, kwargc=0, op=CALL_FUNCTION, extra=0): self.stackchange((1+argc+2*kwargc+extra,1)) emit = self.emit emit(op); emit(argc); emit(kwargc) def CALL_FUNCTION_VAR(self, argc=0, kwargc=0): self.CALL_FUNCTION(argc,kwargc,CALL_FUNCTION_VAR, 1) # 1 for *args def CALL_FUNCTION_KW(self, argc=0, kwargc=0): self.CALL_FUNCTION(argc,kwargc,CALL_FUNCTION_KW, 1) # 1 for **kw def CALL_FUNCTION_VAR_KW(self, argc=0, kwargc=0): self.CALL_FUNCTION(argc,kwargc,CALL_FUNCTION_VAR_KW, 2) # 2 *args,**kw def BUILD_TUPLE(self, count): self.stackchange((count,1)) self.emit_arg(BUILD_TUPLE,count) def BUILD_LIST(self, count): self.stackchange((count,1)) self.emit_arg(BUILD_LIST,count) def UNPACK_SEQUENCE(self, count): self.stackchange((1,count)) self.emit_arg(UNPACK_SEQUENCE,count) def RETURN_VALUE(self): self.stackchange((1,0)) self.emit(RETURN_VALUE) self.stack_unknown() def BUILD_SLICE(self, count): assert count in (2,3), "Invalid number of arguments for BUILD_SLICE" self.stackchange((count,1)) self.emit_arg(BUILD_SLICE,count) def DUP_TOPX(self, count): self.stackchange((count,count*2)) self.emit_arg(DUP_TOPX,count) def RAISE_VARARGS(self, argc): assert 0<=argc<=3, "Invalid number of arguments for RAISE_VARARGS" self.stackchange((argc,0)) self.emit_arg(RAISE_VARARGS,argc) def MAKE_FUNCTION(self, ndefaults): self.stackchange((1+ndefaults,1)) self.emit_arg(MAKE_FUNCTION, ndefaults) def MAKE_CLOSURE(self, ndefaults, freevars): self.stackchange((1+freevars+ndefaults,1)) self.emit_arg(MAKE_CLOSURE, ndefaults) def here(self): return len(self.co_code) def set_stack_size(self, size): if size<0: raise AssertionError("Stack underflow") if size>self.co_stacksize: self.co_stacksize = size bytes = len(self.co_code) - len(self.stack_history) + 1 if bytes>0: self.stack_history.extend([self._ss]*bytes) self._ss = size def get_stack_size(self): return self._ss stack_size = property(get_stack_size, set_stack_size) def stackchange(self, (inputs,outputs)): if self._ss is None: raise AssertionError("Unknown stack size at this location") self.stack_size -= inputs # check underflow self.stack_size += outputs # update maximum height def stack_unknown(self): self._ss = None def branch_stack(self, location, expected): if location >= len(self.stack_history): if location > len(self.co_code): raise AssertionError("Forward-looking stack prediction!", location, len(self.co_code) ) actual = self.stack_size if actual is None: self.stack_size = actual = expected self.stack_history[location] = actual else: actual = self.stack_history[location] if actual is None: self.stack_history[location] = actual = expected if actual != expected: raise AssertionError( "Stack level mismatch: actual=%s expected=%s" % (actual, expected) ) def jump(self, op, arg=None): def jump_target(offset): target = offset if op not in hasjabs: target = target - (posn+3) assert target>=0, "Relative jumps can't go backwards" if target>0xFFFF: target = offset - (posn+6) return target def backpatch(offset): target = jump_target(offset) if target>0xFFFF: raise AssertionError("Forward jump span must be <64K bytes") self.co_code[posn+1] = target & 255 self.co_code[posn+2] = (target>>8) & 255 self.branch_stack(offset, old_level) old_level = self.stack_size posn = self.here() if arg is not None: self.emit_arg(op, jump_target(arg)) self.branch_stack(arg, old_level) lbl = None else: self.emit_arg(op, 0) def lbl(code=None): backpatch(self.here()) if op in (JUMP_FORWARD, JUMP_ABSOLUTE, CONTINUE_LOOP): self.stack_unknown() return lbl def COMPARE_OP(self, op): self.stackchange((2,1)) self.emit_arg(COMPARE_OP, compares[op]) def setup_block(self, op): jmp = self.jump(op) self.blocks.append((op,self.stack_size,jmp)) return jmp def SETUP_EXCEPT(self): ss = self.stack_size self.stack_size = ss+3 # simulate the level at "except:" time self.setup_block(SETUP_EXCEPT) self.stack_size = ss # restore the current level def SETUP_FINALLY(self): ss = self.stack_size self.stack_size = ss+3 # allow for exceptions self.stack_size = ss+1 # simulate the level after the None is pushed self.setup_block(SETUP_FINALLY) self.stack_size = ss # restore original level def SETUP_LOOP(self): self.setup_block(SETUP_LOOP) def POP_BLOCK(self): if not self.blocks: raise AssertionError("Not currently in a block") why, level, fwd = self.blocks.pop() self.emit(POP_BLOCK) if why!=SETUP_LOOP: if why==SETUP_FINALLY: self.LOAD_CONST(None) fwd() else: self.stack_size = level-3 # stack level resets here else_ = self.JUMP_FORWARD() fwd() return else_ else: return fwd def assert_loop(self): for why,level,fwd in self.blocks: if why==SETUP_LOOP: return raise AssertionError("Not inside a loop") def BREAK_LOOP(self): self.assert_loop(); self.emit(BREAK_LOOP) self.stack_unknown() def CONTINUE_LOOP(self, label): self.assert_loop() if self.blocks[-1][0]==SETUP_LOOP: op = JUMP_ABSOLUTE # more efficient if not in a nested block else: op = CONTINUE_LOOP return self.jump(op, label) def __call__(self, *args): last = None for ob in args: if callable(ob): last = ob(self) else: try: f = generate_types[type(ob)] except KeyError: raise TypeError("Can't generate", ob) else: last = f(self, ob) return last def return_(self, ob=None): return self(ob, Code.RETURN_VALUE) def from_function(cls, function, copy_lineno=False): code = cls.from_code(function.func_code, copy_lineno) return code from_function = classmethod(from_function) def from_code(cls, code, copy_lineno=False): self = cls() if copy_lineno: self.set_lineno(code.co_firstlineno) self.co_filename = code.co_filename import inspect args, var, kw = inspect.getargs(code) self.co_varnames.extend(args) if var: self.co_varnames.append(var) self.co_flags |= CO_VARARGS if kw: self.co_varnames.append(kw) self.co_flags |= CO_VARKEYWORDS def tuple_arg(args): self.UNPACK_SEQUENCE(len(args)) for arg in args: if isinstance(arg, list): tuple_arg(arg) else: self.STORE_FAST(arg) for narg, arg in enumerate(args): if isinstance(arg,list): dummy_name = '.'+str(narg) self.co_varnames[narg] = dummy_name self.LOAD_FAST(dummy_name) tuple_arg(arg) self.co_argcount = code.co_argcount self.co_name = code.co_name self.co_freevars = code.co_freevars return self from_code = classmethod(from_code) def code(self): if self.blocks: raise AssertionError("%d unclosed block(s)" % len(self.blocks)) flags = self.co_flags & ~CO_NOFREE if not self.co_freevars and not self.co_cellvars: flags |= CO_NOFREE return code( self.co_argcount, len(self.co_varnames), self.co_stacksize, flags, self.co_code.tostring(), tuple(self.co_consts), tuple(self.co_names), tuple(self.co_varnames), self.co_filename, self.co_name, self.co_firstlineno, self.co_lnotab.tostring(), self.co_freevars, self.co_cellvars ) for op in hasfree: if not hasattr(Code, opname[op]): def do_free(self, varname, op=op): self.stackchange(stack_effects[op]) try: arg = list(self.co_cellvars+self.co_freevars).index(varname) except ValueError: raise NameError("Undefined free or cell var", varname) self.emit_arg(op, arg) setattr(Code, opname[op], with_name(do_free, opname[op])) compares = {} for value, name in enumerate(cmp_op): compares[value] = value compares[name] = value compares['<>'] = compares['!='] for op in hasname: if not hasattr(Code, opname[op]): def do_name(self, name, op=op): self.stackchange(stack_effects[op]) try: arg = self.co_names.index(name) except ValueError: arg = len(self.co_names) self.co_names.append(name) self.emit_arg(op, arg) if op in (LOAD_NAME, STORE_NAME, DELETE_NAME): # Can't use optimized local vars, so reset flags self.co_flags &= ~CO_OPTIMIZED setattr(Code, opname[op], with_name(do_name, opname[op])) for op in haslocal: if not hasattr(Code, opname[op]): def do_local(self, varname, op=op): if not self.co_flags & CO_OPTIMIZED: raise AssertionError( "co_flags must include CO_OPTIMIZED to use fast locals" ) self.stackchange(stack_effects[op]) try: arg = self.co_varnames.index(varname) except ValueError: arg = len(self.co_varnames) self.co_varnames.append(varname) self.emit_arg(op, arg) setattr(Code, opname[op], with_name(do_local, opname[op])) for op in hasjrel+hasjabs: if not hasattr(Code, opname[op]): def do_jump(self, address=None, op=op): self.stackchange(stack_effects[op]) return self.jump(op, address) setattr(Code, opname[op], with_name(do_jump, opname[op])) def gen_map(code, ob): code.BUILD_MAP(0) for k,v in ob.items(): code.DUP_TOP() code(k, v) code.ROT_THREE() code.STORE_SUBSCR() def gen_tuple(code, ob): code(*ob) return code.BUILD_TUPLE(len(ob)) def gen_list(code, ob): code(*ob) return code.BUILD_LIST(len(ob)) generate_types = { int: Code.LOAD_CONST, long: Code.LOAD_CONST, bool: Code.LOAD_CONST, CodeType: Code.LOAD_CONST, str: Code.LOAD_CONST, unicode: Code.LOAD_CONST, complex: Code.LOAD_CONST, float: Code.LOAD_CONST, type(None): Code.LOAD_CONST, tuple: gen_tuple, list: gen_list, dict: gen_map, } class NotAConstant(Exception): """The supplied value is not a constant expression tree""" def const_value(value): """Return the constant value -- if any -- of an expression tree Raises NotAConstant if the value or any child of the value are not constants. """ t = type(value) if t is Const: value = value.value elif t is tuple: t = tuple(map(const_value,value)) if t==value: return value return t elif generate_types.get(t) != Code.LOAD_CONST: raise NotAConstant(value) return value def fold_args(f, *args): """Return a folded ``Const`` or an argument tuple""" try: for arg in args: if arg is not Pass and arg is not None: const_value(arg) except NotAConstant: return args else: c = Code() f(*args+(c,)) c.RETURN_VALUE() return Const(eval(c.code())) class _se: """Quick way of defining static stack effects of opcodes""" POP_TOP = END_FINALLY = 1,0 ROT_TWO = 2,2 ROT_THREE = 3,3 ROT_FOUR = 4,4 DUP_TOP = 1,2 UNARY_POSITIVE = UNARY_NEGATIVE = UNARY_NOT = UNARY_CONVERT = \ UNARY_INVERT = GET_ITER = LOAD_ATTR = IMPORT_FROM = 1,1 BINARY_POWER = BINARY_MULTIPLY = BINARY_DIVIDE = BINARY_FLOOR_DIVIDE = \ BINARY_TRUE_DIVIDE = BINARY_MODULO = BINARY_ADD = BINARY_SUBTRACT = \ BINARY_SUBSCR = BINARY_LSHIFT = BINARY_RSHIFT = BINARY_AND = \ BINARY_XOR = BINARY_OR = COMPARE_OP = 2,1 INPLACE_POWER = INPLACE_MULTIPLY = INPLACE_DIVIDE = \ INPLACE_FLOOR_DIVIDE = INPLACE_TRUE_DIVIDE = INPLACE_MODULO = \ INPLACE_ADD = INPLACE_SUBTRACT = INPLACE_LSHIFT = INPLACE_RSHIFT = \ INPLACE_AND = INPLACE_XOR = INPLACE_OR = 2,1 SLICE_0, SLICE_1, SLICE_2, SLICE_3 = \ (1,1),(2,1),(2,1),(3,1) STORE_SLICE_0, STORE_SLICE_1, STORE_SLICE_2, STORE_SLICE_3 = \ (2,0),(3,0),(3,0),(4,0) DELETE_SLICE_0, DELETE_SLICE_1, DELETE_SLICE_2, DELETE_SLICE_3 = \ (1,0),(2,0),(2,0),(3,0) STORE_SUBSCR = 3,0 DELETE_SUBSCR = STORE_ATTR = 2,0 DELETE_ATTR = STORE_DEREF = 1,0 PRINT_EXPR = PRINT_ITEM = PRINT_NEWLINE_TO = IMPORT_STAR = 1,0 RETURN_VALUE = YIELD_VALUE = STORE_NAME = STORE_GLOBAL = STORE_FAST = 1,0 PRINT_ITEM_TO = LIST_APPEND = 2,0 LOAD_LOCALS = LOAD_CONST = LOAD_NAME = LOAD_GLOBAL = LOAD_FAST = \ LOAD_CLOSURE = LOAD_DEREF = IMPORT_NAME = BUILD_MAP = 0,1 EXEC_STMT = BUILD_CLASS = 3,0 JUMP_IF_TRUE = JUMP_IF_FALSE = 1,1 stack_effects = [(0,0)]*256 for name in opcode: op = opcode[name] name = name.replace('+','_') if hasattr(_se,name): # update stack effects table from the _se class stack_effects[op] = getattr(_se,name) if not hasattr(Code,name): # Create default method for Code class if op>=HAVE_ARGUMENT: def do_op(self,arg,op=op,se=stack_effects[op]): self.stackchange(se); self.emit_arg(op,arg) else: def do_op(self,op=op,se=stack_effects[op]): self.stackchange(se); self.emit(op) setattr(Code, name, with_name(do_op, name)) PKúS&8Z=]ç  peak/util/assembler.pyc;ò wñ€Gc@s`dklZdkTdklZlZdklZdklZddddd d d d d dddddddddddgZ hZ xae dƒD]SZ e e Zeidƒoq–neidƒoe e ed e:e e e8e=e e ƒƒqqWhZ?x.e@eAƒD] \ZBZeBe?eBe:e e e8eDe e ƒƒq¢q¢WxTeED]LZ e<e:e e ƒ o1e d@„ZFe>e:e e e8eFe e ƒƒqùqùWx[eGeHD]OZ e<e:e e ƒ o4e(e dA„ZIe>e:e e e8eIe e ƒƒqTqTWdB„ZJdC„ZKdD„ZLheMe:iN<eOe:iN<ePe:iN<ee:iN<eQe:iN<eRe:iN<eSe:iN<eTe:iN<eUe(ƒe:iN<e%eK<eVeL<eWeJe:ee8ebeƒƒqªqªWdOS(P(sarray(s*(scodesfunction(sCodeType(sSymbolsCodesConstsReturnsGlobalsLocalsCalls const_values NotAConstantsLabels 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