Derive Macro CoreOptions

#[derive(CoreOptions)]
{
    // Attributes available to this derive:
    #[options]
    #[categories]
}

Implements the CoreOptions trait by generating a set_core_options() implementation that checks whether the frontend supports “options v2” or “options v1” and uses retro_variables as fallback.

Initializes the following data structures from the given input:

• retro_core_option_definition
• retro_variable
• retro_core_option_v2_category
• retro_core_option_v2_definition
• retro_core_options_v2

Examples

#[derive(CoreOptions)]
#[options({
    "foo_option_1",
    "Speed hack coprocessor X",
    "Provides increased performance at the expense of reduced accuracy",
    {
        { "false" },
        { "true" },
        { "unstable", "Turbo (Unstable)" },
    },
    "true"
}, {
    "foo_option_2",
    "Speed hack main processor Y",
    "Provides increased performance at the expense of reduced accuracy",
    {
        { "false" },
        { "true" },
        { "unstable", "Turbo (Unstable)" },
    },
})]
struct TestCore;

TODO:

• Add V2 (category support) documentation
• Support *_intl variants