def matrix_parser():
cell = many1(digit()).parsecmap(''.join).parsecmap(int)
height = yield cell
yield (string(",") << spaces())
width = yield cell
yield string('\n')
row = separated(cell, string(",") << spaces(), mint=width, maxt=width)
rows = separated(row, string('\n'), mint=height, maxt=height)
return rows
def ratio():
[num, den] = yield (separated(number, string("/"), 2, maxt=2, end=False)
| na.result([0, 0]))
if den:
return num / den
else:
return None
def parser_by_count(value):
try:
num_cells = int(value)
return separated(cell,
string(",") << spaces(),
mint=num_cells,
maxt=num_cells)
except ValueError:
return Parser(
lambda index, text: Value.failure(index, "expected a number"))
parse_meta = parsec.spaces().parsecmap(lambda _: CodeGenKind('meta'))
parse_plain = (parsec.spaces() >>
(name_pattern + star_pattern) << parsec.spaces()
).parsecmap(lambda value: CodeGenKind('plain', value))
parse_list = (parsec.string('[') >>
(name_pattern + star_pattern) << parsec.string(']')
).parsecmap(lambda value: CodeGenKind('list', value))
parse_dlist = (parsec.string('[[') >>
(name_pattern + star_pattern) << parsec.string(']]')
).parsecmap(lambda value: CodeGenKind('dlist', value))
parse_set = (parsec.string('{') >>
(name_pattern + star_pattern) << parsec.string('}')
).parsecmap(lambda value: CodeGenKind('set', value))
parse_dict = (parsec.string('{') >> parsec.separated(
(name_pattern + star_pattern), parsec.string(':'), 2, 2) <<
parsec.string('}')
).parsecmap(lambda values: CodeGenKind('dict', tuple(values)))
codegen_spec_parser = parse_dict ^ parse_set ^ parse_dlist ^ parse_list ^ parse_plain ^ parse_meta
def parse_codegen_spec(kind):
if kind.startswith('vineyard'):
kind = kind[len('vineyard'):]
if kind.startswith('codegen'):
kind = kind[len('codegen'):]
if kind.startswith(':'):
kind = kind[1:]
return codegen_spec_parser.parse(kind)
return '[reg %s]' % self.reg
class Computer:
def __init__(self, program, registers):
self.program = program
self.registers = registers
self.ip = 0
def run_program(self):
while self.ip < len(self.program):
self.program[self.ip].apply(self)
self.ip = self.ip + 1
parse_value = parsec.choice(parsec.letter().parsecmap(Register),
parsec.regex(r'-?\d+').parsecmap(int).parsecmap(Literal))
parse_args = parsec.separated(parse_value, parsec.space(), 1, maxt=2)
instructions = {'cpy': Cpy, 'inc': Inc, 'dec': Dec, 'jnz': Jnz}
parse_instr = reduce(parsec.choice, [parsec.string(k).result(v) for (k, v) in instructions.items()])
def apply_args(ctor):
return (parsec.space()
.compose(parse_args.parsecmap(lambda args: ctor(*args))))
parse_line = parse_instr.bind(apply_args)
def regex_parse(line):
def arg(x):
m = regex.match(r'-?\d+', x)
if m:
return Literal(int(x))
return Register(x)
def words(self, n=1):
return psc.separated(self.word(), psc.spaces(), n, n,
end=False).parsecmap(lambda x: ' '.join(x))