Enums

ruby-bindgen generates Rice enum bindings for both scoped and unscoped C++ enums. For details on the generated Ruby enum API (comparison, conversion, bitwise operations), see the Rice Enums documentation.

Scoped Enums (enum class)

enum class Color
{
    Red, Green, Blue
};

Generates a Rice enum with properly scoped values.

Unscoped Enums

Unscoped enums in namespaces have values at namespace scope:

namespace cv
{
    enum BorderType
    {
        BORDER_CONSTANT, BORDER_REPLICATE
    };
}
// Values are cv::BORDER_CONSTANT, not cv::BorderType::BORDER_CONSTANT

Unscoped enums inside classes have values qualified with the enum name:

class Buffer
{
    enum Target
    {
        ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER
    };
};
// Values are Buffer::Target::ARRAY_BUFFER