This is a derive procedural macro that will let you add custom derive and attributes over structs, enums and unions. This derive will add two impl on the type. The as_string() method returns a json serialized string representation of the type with any meta information annotated with structype_meta("key"=val) attribute, while the print_fields() method will print the same to STDOUT. This macro will panic at compile time if annotated over tuple and unit structs.

Example:

use structype_derive::StrucType;
#[derive(StrucType)]
// #[structype_meta("labelover_ride=name")] This will panic the macro
struct UserStruct {
#[structype_meta(override_name="Primary ID", order="1")]
id: i64,
#[structype_meta(override_name="name", order="0")]
username: String,
org: String,
details: Details,
}

#[derive(StrucType)]
struct Details {
user_attributes: std::collections::HashMap<String, String>,
}

fn print_struct_fields() {
UserStruct::print_fields();
let data = UserStruct::as_string();
println!("{}", data);
Details::print_fields();
let data = Details::as_string();
println!("{}", data);
}

The above will generate and return a json serialized string representation where the key is the struct's field name and the value is a HashMap<String, String> of structype_meta's key-val. If the structype_meta is absent, the field's associated value would be an empty {}.

Output:

[
{
"id": {
"override_name": "Primary ID",
"order": "1"
}
},
{
"username": {
"override_name": "name",
"order": "0"
}
},
{
"org": {}
},
{
"details": {}
}
]