Substruct

Description

This is a small proc-macro used to remove the specified fields from a struct. This is useful when you have relatively similar structs whose difference is that one has more fields than the other. For example a request to create a customer might take the shape

{ "name" : "John Smith", "address" : "New York", "currency" : "usd"}

while the response has

{ "id" : "83937220", "name" : "John Smith", "address" : "New York", "currency" : "usd"}

In such a case, one would define the struct with all the fields.

struct Customer {
    id : String,
    name : String,
    address : String,
    currency : String}

and then use this crate as where CreateCustomer is the name of the new struct without the id field [substruct(Customer, CreateCustomer ["id"])]