/
expr.py
65 lines (57 loc) · 1.74 KB
/
expr.py
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from abc import ABC, abstractmethod
class Expr:
class Visitor(ABC):
@abstractmethod
def visit_assign_expr(self, expr): pass
@abstractmethod
def visit_listed_expr(self, expr): pass
@abstractmethod
def visit_group_expr(self, expr): pass
@abstractmethod
def visit_literal_expr(self, expr): pass
@abstractmethod
def visit_variable_expr(self, expr): pass
@abstractmethod
def visit_cast_expr(self, expr): pass
@abstractmethod
def visit_call_expr(self, expr): pass
class Listed:
def __init__(self, operator, children=[]):
self.operator = operator
self.children = children
def accept(self, visitor):
return visitor.visit_listed_expr(self)
class Assign:
def __init__(self, name, value):
self.name = name
self.value = value
def accept(self, visitor):
return visitor.visit_assign_expr(self)
class Cast:
def __init__(self, name, kind):
self.name = name
self.kind = kind
def accept(self, visitor):
return visitor.visit_cast_expr(self)
class Call:
def __init__(self, callee, paren, args):
self.callee = callee
self.paren = paren
self.args = args
def accept(self, visitor):
return visitor.visit_call_expr(self)
class Literal:
def __init__(self, value):
self.value = value
def accept(self, visitor):
return visitor.visit_literal_expr(self)
class Grouping:
def __init__(self, expression):
self.expression = expression
def accept(self, visitor):
return visitor.visit_group_expr(self)
class Variable:
def __init__(self, name, value=None):
self.name = name
def accept(self, visitor):
return visitor.visit_variable_expr(self)