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from sympy.core.symbol import Symbol
from sympy.codegen.ast import Type
from sympy.codegen.cxxnodes import using
from sympy.printing import cxxcode

x = Symbol('x')

def test_using():
    v = Type('std::vector')
    u1 = using(v)
    assert cxxcode(u1) == 'using std::vector'

    u2 = using(v, 'vec')
    assert cxxcode(u2) == 'using vec = std::vector'