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Adding docstrings for some of llnumba.

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This commit is contained in:
Jon Riehl 2012-10-15 15:21:53 -05:00
commit fe1ba06698
4 changed files with 68 additions and 0 deletions
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15
byte_flow.py
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@ -10,6 +10,19 @@ import opcode_util
# ______________________________________________________________________
class BytecodeFlowBuilder (BytecodeIterVisitor):
'''Transforms a bytecode vector into a bytecode "flow tree".
The flow tree is a Python dictionary, described loosely by the
following set of productions:
* `flow_tree` ``:=`` ``{`` `blocks` ``*`` ``}``
* `blocks` ``:=`` `block_index` ``:`` ``[`` `bytecode_tree` ``*`` ``]``
* `bytecode_tree` ``:=`` ``(`` `opcode_index` ``,`` `opcode` ``,``
`opname` ``,`` `arg` ``,`` ``[`` `bytecode_tree` ``*`` ``]`` ``)``
The primary purpose of this transformation is to simulate the
value stack, removing it and any stack-specific opcodes.'''
def __init__ (self, *args, **kws):
super(BytecodeFlowBuilder, self).__init__(*args, **kws)
om_items = opcode_util.OPCODE_MAP.items()
@ -195,6 +208,8 @@ class BytecodeFlowBuilder (BytecodeIterVisitor):
# ______________________________________________________________________
def build_flow (func):
'''Given a Python function, return a bytecode flow tree for that
function.'''
return BytecodeFlowBuilder().visit(opcode_util.get_code_object(func))
# ______________________________________________________________________