new_expr = Const(v)
return new_expr
p = Process()
# p.const("a1", 1)
# p.const("b1", 6)
# p.const("k", 12)
# p.const("one", 1)
# p.const("two", 2)
list2const = ['Const', 'Const']
list1const = ['Const']
p.symbol("a0", "a0")
p.symbol("b0", "b0")
p.symbol("a1", "a1")
p.symbol("b1", "b1")
p.symbol("a2", "a2")
p.symbol("b2", "b2")
p.const("true", 1)
p.const("false", 0)
p.const("fake", 0)
p.define("add", [["a0", "b0"]], ["fake"], True, add_func,
['Const', 'Const', 'Const'])
p.define("mul", [["a1", "b1"]], ["fake"], True, mul_func,
['Const', 'Const', 'Const'])
p.define("neg", [["a2"]], ["fake"], True, neg_func, ['Const', 'Const'])
p.text_define()
lol = p.eval('main')
print(lol.to_str(p))
