def visit(self, node):
self.code.append(LabelIL(self.cur_class, node.name, True))
#This has being push already before calling dispatch
# El self se adiciona en el class node
variables = Variables()
variables.add_var('self') #Self its alway the first parameter
for p in node.params:
variables.add_var(p.name)
variables.add_temp() # return address
self.visit(node.body, variables)
self.code.append(ReturnIL())
def create_constructor(self, attrs):
self.code.append(LabelIL(self.cur_class, 'Constructor', True))
variables = Variables()
variables.add_var('self')
variables.add_temp() # return address
for node in attrs:
if node.value == None:
continue
self.visit(node.value, variables)
p = variables.peek_last()
idx = self.vt.get_attr_id(self.cur_class, node.name.value)
self.code.append(VarToMemoIL(variables.id('self'), variables.id(p), idx))
variables.pop_var()
self.code.append(PopIL(1))
self.code.append(PushIL()) #No result, but needed in logic
self.code.append(ReturnIL())
def unary_op(self, node, variables : Variables , symb : str):
self.code.append(CommentIL('Unary_op'))
res = variables.add_temp()
self.code.append(PushIL())
self.visit(node.expr, variables)
l = variables.peek_last()
self.code.append(UnaryOpIL(variables.id(res), variables.id(l), symb))
variables.pop_var()
self.code.append(PopIL(1))
def visit(self, node, variables : Variables):
self.code.append(PushIL())
res = variables.add_temp()
child_vars = variables.get_copy()
for expr in node.let_part:
self.visit(expr, child_vars)
child_vars = child_vars.get_copy()
self.visit(node.in_part, child_vars)
p = child_vars.peek_last()
self.code.append(VarToVarIL(res, p))
self.code.append(PopIL(len(node.let_part) + 1))
def bin_op(self, node, variables : Variables, sym : str):
self.code.append(CommentIL('Binary_op'))
self.code.append(PushIL(0))
res = variables.add_temp()
self.visit(node.left, variables)
l = variables.peek_last()
self.visit(node.right, variables)
r = variables.peek_last()
self.code.append(BinOpIL(variables.id(res), variables.id(l), variables.id(r), sym))
variables.pop_var()
variables.pop_var()
self.code.append(PopIL(2))