def ct_mypgen (name, src, env):
assert name is not None
grammar_obj = pgen_to_grammar_obj(src)
env = env.copy()
env["quote_%s" % name] = makequote(
PyPgen.PyPgenParser(grammar_obj).parseString)
ast, env = env["myfrontend"]("from basil.parsing.PyPgen import "
"PyPgenParser\n%s_gobj = %s\n"
"%s_parser = PyPgenParser(%s_gobj)\n" %
(name, pprint.pformat(grammar_obj), name,
name), env)
return ast.body, env
def test_makequote_with_mutation (self):
DUMMY_VALUE = "kookamungous"
def myotherprocessor (source, env):
if "sideeffectuals" in env:
env["sideeffectuals"]["otherval"] = DUMMY_VALUE
return DUMMY_VALUE, env
env = mybuiltins.initial_environment()
env["sideeffectuals"] = {}
env["myquote2"] = mybuiltins.makequote(myotherprocessor, True)
_, env = env["myfront"](None, "quote [myquote2] myval2: anything2\n\n",
env)
self.assertEquals(env["myval2"], env["sideeffectuals"]["otherval"])
self.assertEquals(env["myval2"], DUMMY_VALUE)
del env["myval2"]
env["sideeffectuals"] = {}
_, env = env["myfront"](None, "quote [myquote2]:\n\tI'm serious,\n\t"
"anything.\n\n", env)
self.assertEquals(env["sideeffectuals"]["otherval"], DUMMY_VALUE)
self.failUnlessRaises(KeyError, env.__getitem__, "myval2")
grammar_obj_to_python_src = pprint.pformat
def pgen_to_python (source):
return grammar_obj_to_python_src(pgen_to_grammar_obj(source))
def ct_mypgen (name, src, env):
assert name is not None
grammar_obj = pgen_to_grammar_obj(src)
env = env.copy()
env["quote_%s" % name] = makequote(
PyPgen.PyPgenParser(grammar_obj).parseString)
ast, env = env["myfrontend"]("from basil.parsing.PyPgen import "
"PyPgenParser\n%s_gobj = %s\n"
"%s_parser = PyPgenParser(%s_gobj)\n" %
(name, pprint.pformat(grammar_obj), name,
name), env)
return ast.body, env
mypgen = makequote(pgen_to_grammar_obj)
DEMO_GRAMMAR = """start: term ('+' term)*
term: atom ('*' atom)*
atom: NAME | NUMBER
"""
if __name__ == "__main__":
print pgen_to_python(DEMO_GRAMMAR)
# ______________________________________________________________________
# End of mypgen.py
#! /usr/bin/env python
# ______________________________________________________________________
from basil.lang.mython import mybuiltins
def nonquote_myboth (src, env = None):
if env is None:
env = mybuiltins.initial_environment()
ast, env = env["myfrontend"](src, env)
env = env.copy()
_, env = env["myeval"](ast, env)
return ast.body, env
def myboth (name, src, env):
ast_list, env = nonquote_myboth(src, env)
if name is not None:
env[name] = ast_list
return ast_list, env
mystring = mybuiltins.makequote(str)
# ______________________________________________________________________
# End of myutils.py
