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"""lispify_ast - returns a tuple representation of the AST
Uses 2.5's _ast, not other AST implementations in CPython, since these
are not used by the compilation phase. And that's what we're
interested in.
Since this is a tuple, we can directly compare, and this is going to
be handy when comparing Jython's implementation vs CPython.
"""
import _ast
import os
import globwalk
def lispify_ast(node):
return tuple(lispify_ast2(node))
def lispify_ast2(node):
yield node.__class__.__name__
try:
for field in node._fields:
yield tuple(lispify_field(field, getattr(node, field)))
except:
pass
def lispify_field(field, child):
yield field
if not isinstance(child, list):
children = [child]
else:
children = child
for node in children:
if isinstance(node, _ast.AST):
yield lispify_ast(node)
else:
if isinstance(node, float):
#stringify floats so they match Java's float representation better
yield str(node)
else:
yield node
if __name__ == '__main__':
import sys
from pprint import pprint
code_path = sys.argv[1]
ast = compile(open(code_path).read(), code_path, "exec", _ast.PyCF_ONLY_AST)
lispified = lispify_ast(ast)
pprint(lispified)
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