def set_sequence(compiler, cont, sequence):
old_parse_state = compiler.new_var(il.ConstLocalVar('old_parse_state'))
sequence = sequence.interlang()
return il.begin(il.Assign(old_parse_state, il.parse_state),
il.SetParseState(il.Tuple(sequence, il.Integer(0))),
il.append_failcont(compiler, il.SetParseState(old_parse_state)),
cont(TRUE))
def string_on_predicate1(compiler, cont, test):
'''return current char and step if @test succeed, where
@test: a python function with one argument, which tests on one char and return True or False
@test must be registered with register_function'''
test = test.interlang()
text = compiler.new_var(il.ConstLocalVar('text'))
pos = compiler.new_var(il.ConstLocalVar('pos'))
length = compiler.new_var(il.ConstLocalVar('length'))
p = compiler.new_var(il.LocalVar('p'))
if not isinstance(test, il.PyFunction):
raise DaoCompileTypeError(test)
return il.Begin((
il.AssignFromList(text, pos, il.parse_state),
il.Assign(length, il.Len(text)),
il.If(il.Ge(pos, length),
il.failcont(il.FALSE),
il.If(il.Call(test, il.GetItem(text, pos)),
il.begin(
il.Assign(p, il.add(pos, il.Integer(1))),
il.While(il.And(il.Lt(p, length), il.Call(test, il.GetItem(text, p))),
il.AddAssign(p, il.Integer(1))),
il.SetParseState(il.Tuple(text, p)),
il.append_failcont(compiler,
il.SetParseState(il.Tuple(text, pos))),
cont(il.GetItem(text, il.Slice2(pos, p)))),
il.failcont(il.FALSE)))))
def skip(compiler, cont, n=il.Integer(1)):
# return element after skip
text = compiler.new_var(il.ConstLocalVar('text'))
pos = compiler.new_var(il.ConstLocalVar('pos'))
return il.Begin((
il.AssignFromList(text, pos, il.parse_state),
il.append_failcont(compiler, il.SetParseState(il.Tuple(text, pos))),
il.SetParseState(il.Tuple(text, il.add(pos, n))),
cont(il.GetItem(text, il.add(pos, n)))))
def goto(compiler, cont, position):
text = compiler.new_var(il.ConstLocalVar('text'))
pos = compiler.new_var(il.ConstLocalVar('pos'))
position = il.Integer(position.item)
return il.Begin((
il.AssignFromList(text, pos, il.parse_state),
il.append_failcont(compiler, il.SetParseState(il.Tuple(text, pos))),
il.SetParseState(il.Tuple(text, position)),
cont(il.GetItem(text, position))))
def parse(compiler, cont, predicate, parse_state):
old_parse_state = compiler.new_var(il.ConstLocalVar('old_parse_state'))
v = compiler.new_var(il.ConstLocalVar('v'))
return il.begin(il.Assign(old_parse_state, il.parse_state),
il.SetParseState(parse_state),
il.append_failcont(compiler, il.SetParseState(old_parse_state)),
predicate.cps(compiler,
il.clamda(v,
il.Assign(il.parse_state, old_parse_state),
cont(v))))
def parse_sequence(compiler, cont, predicate, sequence):
old_parse_state = compiler.new_var(il.ConstLocalVar('old_parse_state'))
v = compiler.new_var(il.ConstLocalVar('v'))
sequence = sequence.interlang()
return il.begin(il.Assign(old_parse_state, il.parse_state),
il.SetParseState(il.Tuple(sequence, il.Integer(0))),
il.append_failcont(compiler, il.SetParseState(old_parse_state)),
predicate.cps(compiler,
il.clamda(v,
il.SetParseState(old_parse_state),
cont(v))))
def follow(compiler, cont, item):
parse_state = compiler.new_var(il.ConstLocalVar('parse_state'))
v = compiler.new_var(il.ConstLocalVar('v'))
return il.begin(
il.Assign(parse_state, il.parse_state),
item.cps(compiler, il.clamda(v, il.SetParseState(parse_state),
cont(v))))
def literal(compiler, cont, arg):
'''any given instance string'''
text = compiler.new_var(il.ConstLocalVar('text'))
pos = compiler.new_var(il.ConstLocalVar('pos'))
p = compiler.new_var(il.LocalVar('p'))
i = compiler.new_var(il.LocalVar('i'))
x = compiler.new_var(il.ConstLocalVar('x'))
length = compiler.new_var(il.ConstLocalVar('length'))
length2 = compiler.new_var(il.ConstLocalVar('length2'))
if isinstance(arg, Var):
return il.Begin((
il.Assign(x, il.Deref(arg)),
il.AssignFromList(text, pos, il.parse_state),
il.Assign(length, il.Len(text)),
il.Assign(length, il.Len(x)),
il.Assign(i, il.Integer(0)),
il.Assign(p, pos),
il.while_(il.and_(il.Lt(i, length2), il.Lt(p, length), il.Eq(il.GetItem(text, p), il.GetItem(x, i))),
il.AddAssign(p, il.Integer(1))),
il.If(il.Lt(i, length2),
il.failcont(il.NONE),
il.begin(il.append_failcont(compiler,
il.SetParseState(il.Tuple(text, pos))),
il.SetParseState(il.Tuple(text, p)),
cont(arg)))))
elif isinstance(arg, String):
arg = arg.interlang()
return il.Begin((
il.AssignFromList(text, pos, il.parse_state),
il.Assign(length, il.Len(text)),
il.Assign(length2, il.Len(arg)),
il.Assign(i, il.Integer(0)),
il.Assign(p, pos),
il.while_(il.and_(il.Lt(i, length2), il.Lt(p, length), il.Eq(il.GetItem(text, p), il.GetItem(arg, i))),
il.AddAssign(p, il.Integer(1)),
il.AddAssign(i, il.Integer(1)),
),
il.If(il.Lt(i, length2),
il.failcont(il.NONE),
il.begin(il.append_failcont(compiler,
il.SetParseState(il.Tuple(text, pos))),
il.SetParseState(il.Tuple(text, p)),
cont(arg)))))
else:
raise CompileTypeError
def integer(compiler, cont, arg):
'''integer'''
text = compiler.new_var(il.ConstLocalVar('text'))
pos = compiler.new_var(il.ConstLocalVar('pos'))
p = compiler.new_var(il.LocalVar('p'))
length = compiler.new_var(il.ConstLocalVar('length'))
if isinstance(arg, Var):
arg = arg.interlang()
x = compiler.new_var(il.ConstLocalVar('x'))
return il.Begin((
il.AssignFromList(text, pos, il.parse_state),
il.Assign(length, il.Len(text)),
il.If(il.Ge(pos, length),
il.failcont(il.FALSE),
il.If(il.Not(il.Cle(il.String('0'), il.GetItem(text, pos), il.String('9'))),
il.failcont(il.FALSE),
il.Begin((
il.Assign(p, il.add(pos, il.Integer(1))),
il.while_(il.And(il.Lt(p, length),
il.Cle(il.String('0'),il.GetItem(text, p),il.String('9'))),
il.AddAssign(p, il.Integer(1))),
il.Assign(x, il.Deref(arg)),
il.If(il.IsLogicVar(x),
il.begin(il.SetParseState(il.Tuple(text, p)),
il.SetBinding(x, il.GetItem(text, il.Slice2(pos, p))),
il.append_failcont(compiler,
il.SetParseState(il.Tuple(text, pos)),
il.DelBinding(x)),
cont(il.GetItem(text, pos))),
il.If(il.Isinstance(x, il.String('str')),
il.If(il.Eq(x, il.GetItem(text, il.Slice2(pos, p))),
il.begin(il.append_failcont(compiler,
il.SetParseState(il.Tuple(text, pos))),
il.SetParseState(il.Tuple(text, p)),
cont(il.GetItem(text, pos))),
il.failcont(il.NONE)),
il.RaiseTypeError(x)))))))))
elif isinstance(arg, il.String):
return il.Begin((
il.AssignFromList(text, pos, il.parse_state),
il.Assign(length, il.Len(text)),
il.If(il.Ge(pos, length),
il.failcont(il.FALSE),
il.If(il.Not(il.Cle(il.String('0'), il.GetItem(text, pos), il.String('9'))),
il.failcont(il.FALSE),
il.Begin((
il.Assign(p, il.add(pos, il.Integer(1))),
il.while_(il.And(il.Lt(p, length),
il.Cle(il.String('0'),il.GetItem(text, p),il.String('9'))),
il.AddAssign(p, il.Integer(1))),
il.If(il.Eq(arg, il.GetItem(text, il.Slice2(pos, p))),
il.begin(il.append_failcont(compiler,
il.SetParseState(il.Tuple(text, pos))),
il.SetParseState(il.Tuple(text, p)),
cont(arg)),
il.failcont(il.NONE))))))))
else:
raise CompileTypeError
def char(compiler, cont, argument):
text = compiler.new_var(il.ConstLocalVar('text'))
pos = compiler.new_var(il.ConstLocalVar('pos'))
if isinstance(argument, String):
argument = argument.interlang()
return il.Begin((
il.AssignFromList(text, pos, il.parse_state),
il.If(il.Ge(pos, il.Len(text)),
il.failcont(il.NONE),
il.If(il.Eq(argument, il.GetItem(text, pos)),
il.begin(il.append_failcont(compiler,
il.SetParseState(il.Tuple(text, pos))),
il.SetParseState(il.Tuple(text, il.add(pos, il.Integer(1)))),
cont(il.GetItem(text, pos))),
il.failcont(il.NONE)))))
elif isinstance(argument, Var):
v = compiler.new_var(il.ConstLocalVar('v'))
argument = argument.interlang()
argument1 = compiler.new_var(il.ConstLocalVar('argument'))
return il.Begin((
il.AssignFromList(text, pos, il.parse_state),
il.If(il.Ge(pos,il.Len(text)),
il.failcont(il.FALSE),
il.Begin((
il.Assign(argument1, il.Deref(argument)),
#il.Prin(text), il.Prin(pos), il.PrintLn(argument1),
il.If(il.Isinstance(argument1, il.Symbol('str')),
il.If(il.Eq(argument1, il.GetItem(text, pos)),
il.begin(il.append_failcont(compiler,
il.SetParseState(il.Tuple(text, pos))),
il.SetParseState(il.Tuple(text, il.add(pos, il.Integer(1)))),
cont(il.GetItem(text, pos))),
il.failcont(il.NONE)),
il.If(il.IsLogicVar(argument1),
il.begin(il.SetParseState(il.Tuple(text, il.add(pos, il.Integer(1)))),
il.SetBinding(argument1, il.GetItem(text, pos)),
il.append_failcont(compiler,
il.SetParseState(il.Tuple(text, pos)),
il.DelBinding(argument1)),
cont(il.GetItem(text, pos))),
il.RaiseTypeError(argument1))))))))
# elif isinstance(argument, il.LogicVar) #how about this? It should be include above.
else: raise CompileTypeError(argument)
def set_parse_state(compiler, cont, parse_state):
old_parse_state = compiler.new_var(il.ConstLocalVar('old_parse_state'))
return il.begin(il.Assign(old_parse_state, il.parse_state),
il.SetParseState(parse_state),
il.append_failcont(compiler, il.SetParseState(old_parse_state)),
cont(TRUE))