def visit_VarAccessNode(self, node, context):
res = RTResult()
var_name = node.var_name_tok.value
value = context.symbol_table.get(var_name)
if not value:
return res.failure(
RTError(node.pos_start, node.pos_end,
f"'{var_name}' is not defined", context))
value = value.copy().set_pos(node.pos_start, node.pos_end)
return res.success(value)
def visit_UnaryOpNode(self, node, context):
res = RTResult()
number = res.register(self.visit(node.node, context))
if res.error: return res
error = None
if node.op_tok.type == TT_MINUS:
number, error = number.multed_by(Number(-1))
elif node.op_tok.matches(TT_KEYWORD, 'NOT'):
number, error = number.notted()
if error:
return res.failure(error)
else:
return res.success(number.set_pos(node.pos_start, node.pos_end))
def visit_BinOpNode(self, node, context):
res = RTResult()
left = res.register(self.visit(node.left_node, context))
if res.error: return res
right = res.register(self.visit(node.right_node, context))
if res.error: return res
if node.op_tok.type == TT_PLUS:
result, error = left.added_to(right)
elif node.op_tok.type == TT_MINUS:
result, error = left.subbed_by(right)
elif node.op_tok.type == TT_MUL:
result, error = left.multed_by(right)
elif node.op_tok.type == TT_DIV:
result, error = left.dived_by(right)
elif node.op_tok.type == TT_POW:
result, error = left.powed_by(right)
elif node.op_tok.type == TT_EE:
result, error = left.get_comparison_eq(right)
elif node.op_tok.type == TT_NE:
result, error = left.get_comparison_ne(right)
elif node.op_tok.type == TT_LT:
result, error = left.get_comparison_lt(right)
elif node.op_tok.type == TT_GT:
result, error = left.get_comparison_gt(right)
elif node.op_tok.type == TT_LTE:
result, error = left.get_comparison_lte(right)
elif node.op_tok.type == TT_GTE:
result, error = left.get_comparison_gte(right)
elif node.op_tok.matches(TT_KEYWORD, 'AND'):
result, error = left.anded_by(right)
elif node.op_tok.matches(TT_KEYWORD, 'OR'):
result, error = left.ored_by(right)
if error:
return res.failure(error)
else:
return res.success(result.set_pos(node.pos_start, node.pos_end))