def main():
# parse an input string by parser with grammar loaded.
# REDUCE event is a good starting point if you want to handle.
g = pyauparser.Grammar.load_file("data/operator.egt")
p = pyauparser.Parser(g)
p.load_file("data/operator_sample_1.txt")
#p.trim_reduction = True
while True:
ret = p.parse_step()
if ret == pyauparser.ParseResultType.ACCEPT:
print("[Accept]")
break
elif ret == pyauparser.ParseResultType.SHIFT:
token = p.token
print("[Shift] {0} '{1}' ({2}:{3})".format(token.symbol.name,
token.lexeme,
token.position[0],
token.position[1]))
elif ret == pyauparser.ParseResultType.REDUCE:
print("[Reduce] {0}".format(p.reduction.production))
elif ret == pyauparser.ParseResultType.REDUCE_ELIMINATED:
print("[ReduceEliminated]")
elif ret == pyauparser.ParseResultType.ERROR:
print("[Error] {0}".format(p.error_info))
return
print("done", p.position)
def parse_and_write_dot_png(g, src_path, dot_path, png_path,
trim_reduction=False,
mark_id=False, simplified=False):
p = pyauparser.Parser(g)
p.trim_reduction = trim_reduction
p.load_file(src_path)
if simplified:
builder = pyauparser.SimplifiedTreeBuilder()
else:
builder = pyauparser.TreeBuilder()
if mark_id:
reduce_id = [0]
def mark_id_handler(handler):
def sub_handler(ret, p):
handler(ret, p)
if ret == pyauparser.ParseResultType.REDUCE:
reduce_id[0] += 1
p.reduction.head.data.id = reduce_id[0]
return sub_handler
builder_p = mark_id_handler(builder)
else:
builder_p = builder
ret = p.parse_all(builder_p)
if ret != pyauparser.ParseResultType.ACCEPT:
print p.error_info
return
print "* SRC:", src_path
result = builder.result
result.dump()
export_to_dot(result, r"dot.exe", dot_path, png_path)
print
def c_parse(cmd_args):
opts, args = getopt.getopt(cmd_args, "e:t")
encoding = None
trim_reduction = False
for o, a in opts:
if o == "-e":
encoding = a
elif o == "-t":
trim_reduction = True
egt_path = args[0]
data_path = args[1]
g = pyauparser.Grammar.load_file(egt_path)
p = pyauparser.Parser(g)
p.load_file(data_path, encoding=encoding)
p.trim_reduction = trim_reduction
while True:
ret = p.parse_step()
if ret == pyauparser.ParseResultType.ACCEPT:
print("Accept")
break
elif ret == pyauparser.ParseResultType.SHIFT:
token = p.token
print("Shift\t{0} ({1}:{2})".format(token, p.line, p.column))
elif ret == pyauparser.ParseResultType.REDUCE:
print("Reduce\t{0}".format(p.reduction.production))
elif ret == pyauparser.ParseResultType.REDUCE_ELIMINATED:
print("ReduceEliminated")
elif ret == pyauparser.ParseResultType.ERROR:
print("Error\t'{0}' ({1}:{2})".format(p.error_info, p.line,
p.column))
return