/usr/share/doc/swig4.0-examples/Examples/test-suite/cpp_enum.i

/*
The primary purpose of this testcase is to ensure that enums used along with the 'enum' keyword compile under c++.
*/

%module cpp_enum

%inline %{

#if __GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
/* for anonymous enums */
/* dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing] */
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
#endif

enum SOME_ENUM {ENUM_ONE, ENUM_TWO};

struct StructWithEnums {
    StructWithEnums() : some_enum(ENUM_ONE) {};
    enum SOME_ENUM some_enum;
    void enum_test1(enum SOME_ENUM param1, enum SOME_ENUM* param2, enum SOME_ENUM& param3) {};
    void enum_test2(SOME_ENUM param1, SOME_ENUM* param2, SOME_ENUM& param3) {};

    SOME_ENUM enum_test3() { return ENUM_ONE; };
    enum SOME_ENUM enum_test4() { return ENUM_TWO; };

    SOME_ENUM* enum_test5() { return &some_enum; };
    enum SOME_ENUM* enum_test6() { return &some_enum; };

    SOME_ENUM& enum_test7() { return some_enum; };
    enum SOME_ENUM& enum_test8() { return some_enum; };
};

 struct Foo
 {   
   enum {Hi, Hello } hola;
   
   Foo() 
     : hola(Hello)
   {
   }
 };

extern "C"
{
 enum {Hi, Hello } hi;
}

%}

// Using true and false in enums is legal in C++. Quoting the standard:
// [dcl.enum]
//     ... The constant-expression shall be of integral or enumeration type.
// [basic.fundamental]
//     ... Types bool, char, wchar_t, and the signed and unsigned integer
//     types are collectively called integral types.
// So this shouldn't lead to a warning, at least in C++ mode.
%inline %{
typedef enum { PLAY = true, STOP = false } play_state;
%}

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