Derive Macro InfoSection

#[derive(InfoSection)]

Implements a corresponding From for this struct, to convert objects of this struct to an information object to be sent to the [redis_module::InfoContext] as a reply.

Example:

#[derive(InfoSection)]
struct Info {
    field_1: String,
    field_2: u64,
    dictionary_1: BTreeMap<String, String>,
}

This procedural macro only implements an easy way to convert objects of this struct, it doesn’t automatically do anything. To actually make use of this, we must return an object of this struct from the corresponding handler (info handler):

static mut INFO: Info = Info::new();

#[info_command_handler]
fn info_command_handler(
    ctx: &InfoContext,
    _for_crash_report: bool) -> RedisResult
{
    ctx.build_one_section(INFO)
}

Notes

1. The name of the struct is taken “as is”, so if it starts with a capital letter (written in the “Upper Camel Case”), like in this example - Info, then it will be compiled into a string prefixed with the module name, ending up being "module_name_Info"-named section. The fields of the struct are also prefixed with the module name, so the field_1 will be prefixed with module_name_ as well.
2. In dictionaries, the type of dictionaries supported varies, for now it is std::collections::BTreeMap and std::collections::HashMap.
3. In dictionaries, the value type can be anything that can be converted into an object of type [redis_module::InfoContextBuilderFieldBottomLevelValue], for example, a std::string::String or u64. Please, refer to [redis_module::InfoContextBuilderFieldBottomLevelValue] for more information.