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Attempt to document the MAKE_FUNCTION/MAKE_LAMBDA mess...

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in Python 3.0+
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rocky
2017-06-09 06:52:14 -04:00
parent 28ee3f1257
commit 6a991833a3
1 changed files with 30 additions and 6 deletions
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36
uncompyle6/semantics/make_function.py
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@@ -428,10 +428,30 @@ def make_function2(self, node, isLambda, nested=1, codeNode=None):
def make_function3(self, node, isLambda, nested=1, codeNode=None):
"""Dump function definition, doc string, and function body."""
"""Dump function definition, doc string, and function body in
Python version 3.0 and above
"""
# FIXME: call make_function3 if we are self.version >= 3.0
# and then simplify the below.
# For Python 3.3, the evaluation stack in MAKE_FUNCTION is:
# * default argument objects in positional order
# * pairs of name and default argument, with the name just below
# the object on the stack, for keyword-only parameters
# * parameter annotation objects
# * a tuple listing the parameter names for the annotations
# (only if there are ony annotation objects)
# * the code associated with the function (at TOS1)
# * the qualified name of the function (at TOS)
# For Python 3.0 .. 3.2 the evaluation stack is:
# * The function object is defined to have argc default parameters,
# which are found below TOS.
# Note: There is no qualified name at TOS
# MAKE_CLOSURE adds an additional closure slot
# Thank you, Python, for a such a well-thought out system that has
# changed 4 or so times.
def build_param(ast, name, default):
"""build parameters:
@@ -451,27 +471,31 @@ def make_function3(self, node, isLambda, nested=1, codeNode=None):
# MAKE_FUNCTION_... or MAKE_CLOSURE_...
assert node[-1].type.startswith('MAKE_')
# Python 3.3+ adds a qualified name at TOS (-1)
# moving down the LOAD_LAMBDA instruction
if 3.0 <= self.version <= 3.2:
lambda_index = -2
elif 3.03 <= self.version:
lambda_index = -3
else:
lambda_index = None
args_node = node[-1]
if isinstance(args_node.attr, tuple):
pos_args, kw_args, annotate_argc = args_node.attr
if self.version <= 3.3 and len(node) > 2 and node[lambda_index] != 'LOAD_LAMBDA':
# positional args are after kwargs
# *args are after kwargs ?
defparams = node[1:args_node.attr[0]+1]
else:
# positional args are before kwargs
# *args are before kwargs ?
defparams = node[:args_node.attr[0]]
else:
if self.version < 3.6:
defparams = node[:args_node.attr]
else:
default, kw, annotate, closure = args_node.attr
# FIXME: start here.
# FIXME: start here for Python 3.6 and above:
defparams = []
# if default:
# defparams = node[-(2 + kw + annotate + closure)]