def __new__(cls, *args):
"""
This constructor can be used in the grammar to create a parser for this
AST node.
"""
from langkit.parsers import _Row, _Transform
return _Transform(_Row(*args), T.Defer(cls._resolve, cls._name.camel))
def type_ref(self):
"""
TypeRepo.Defer instance for the ASTNodeType subclass corresponding
to this alternative.
"""
def get():
assert self._type
return self._type
return T.Defer(get, 'Alternative({})'.format(self.name.camel))
def entity(cls):
return T.Defer(lambda: cls._resolve().entity,
'{}.entity'.format(cls._name.camel))
def array(cls):
"""
Return the array type whose element type is `cls`.
"""
return T.Defer(lambda: cls._resolve().array,
'{}.array'.format(cls._name.camel))