How to use the pycparserext.ext_c_generator.GnuCGenerator function in pycparserext

def test_double_pointer():
    src = """
    typedef struct Error {
        int dummy;
    } Error;

    void func_with_p2pp(const char *, Error **);
    """
    import pycparserext.ext_c_parser as ext_c_parser
    import pycparserext.ext_c_generator as ext_c_generator

    parser = ext_c_parser.GnuCParser()
    ast = parser.parse(src)
    gen = ext_c_generator.GnuCGenerator()
    ast.show()
    assert gen.visit(ast).find("func_with_p2pp(const char *, Error **)") != -1

def test_asm_volatile_1():
    src = """
    void read_tsc(void) {
        long val;
        asm("rdtsc" : "=A" (val));
    }    """
    from pycparserext.ext_c_parser import GnuCParser
    p = GnuCParser()
    ast = p.parse(src)
    ast.show()

    from pycparserext.ext_c_generator import GnuCGenerator
    print(GnuCGenerator().visit(ast))

def test_funky_header_code_5():
    src = """ void  do_foo(void) __asm(__STRING(do_foo));"""

    from pycparserext.ext_c_parser import GnuCParser
    p = GnuCParser()
    ast = p.parse(src)
    ast.show()

    from pycparserext.ext_c_generator import GnuCGenerator
    print(GnuCGenerator().visit(ast))

int __m;
           if (__x == 0)
              __asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
           else
              __asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
           return __m & 0x8;
         }
        """

    from pycparserext.ext_c_parser import GnuCParser
    p = GnuCParser()
    ast = p.parse(src)
    ast.show()

    from pycparserext.ext_c_generator import GnuCGenerator
    print(GnuCGenerator().visit(ast))

def test_array_ptr_decl_attribute():
    src = """
    int* __attribute__((weak)) array[256];
    """
    from pycparserext.ext_c_parser import GnuCParser
    p = GnuCParser()
    ast = p.parse(src)
    ast.show()

    from pycparserext.ext_c_generator import GnuCGenerator
    print(GnuCGenerator().visit(ast))

def test_func_ret_ptr_decl_attribute():
    src = """
    extern void* memcpy(const void* src, const void *dst, int len)
    __attribute__((unused));
    """
    from pycparserext.ext_c_parser import GnuCParser
    p = GnuCParser()
    ast = p.parse(src)
    ast.show()

    from pycparserext.ext_c_generator import GnuCGenerator
    print(GnuCGenerator().visit(ast))

src = """
        extern __inline int __attribute__ ((__nothrow__)) __signbitf (float __x)
         {
           int __m;
           __asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
           return __m & 0x8;
         }
        """

    from pycparserext.ext_c_parser import GnuCParser
    p = GnuCParser()
    ast = p.parse(src)
    ast.show()

    from pycparserext.ext_c_generator import GnuCGenerator
    print(GnuCGenerator().visit(ast))

def test_lvalue_gnu_statement_expression():
    src = """
      int func(int a) {
        int ret=(int)({; ; *(int*)&a;});
        return ret;
     }
    """

    from pycparserext.ext_c_parser import GnuCParser
    p = GnuCParser()
    ast = p.parse(src)
    ast.show()

    from pycparserext.ext_c_generator import GnuCGenerator
    print(GnuCGenerator().visit(ast))