Decoding JSON

import json
struct Foo {
    x int
}
struct User {
    name      string
    age       int
    // Use the `skip` attribute to skip certain fields
    foo       Foo    [skip]
    // If the field name is different in JSON, it can be specified
    last_name string [json: lastName]
}
data := '{ "name": "Frodo", "lastName": "Baggins", "age": 25 }'
user := json.decode(User, data) or {
    eprintln('Failed to decode json')
    return
}
println(user.name)
println(user.last_name)
println(user.age)
// You can also decode JSON arrays:
sfoos := '[{"x":123},{"x":456}]'
foos := json.decode([]Foo, sfoos) ?
println(foos[0].x)
println(foos[1].x)

Because of the ubiquitous nature of JSON, support for it is built directly into V.

The json.decode function takes two arguments: the first is the type into which the JSON value should be decoded and the second is a string containing the JSON data.

V generates code for JSON encoding and decoding. No runtime reflection is used. This results in much better performance.