code: def test_CXX11CodePrinter():
      assert CXX11CodePrinter().doprint(log1p(x)) == "std::log1p(x)"
  
      cxx11printer = CXX11CodePrinter()
      assert cxx11printer.language == "C++"
      assert cxx11printer.standard == "C++11"
      assert "operator" in cxx11printer.reserved_words
      assert "noexcept" in cxx11printer.reserved_words
      assert "concept" not in cxx11printer.reserved_words
  
file_path: sympy/sympy/printing/tests/test_cxx.py
imports: from sympy.core.numbers import Float, Integer, Rational
  from sympy.core.symbol import symbols
  from sympy.functions import beta, Ei, zeta, Max, Min, sqrt, riemann_xi, frac
  from sympy.printing.cxx import CXX98CodePrinter, CXX11CodePrinter, CXX17CodePrinter, cxxcode
  from sympy.codegen.cfunctions import log1p
label_desc: Use image node_id 2 for calling a global function with example usage: test_CXX11CodePrinter() without return types