1 unstable release
Uses old Rust 2015
0.1.0 | Apr 20, 2018 |
---|
#130 in #tokens
7KB
63 lines
static-json-pointer
Macro to extract Rust tokens and literals from a JSON schema
If you have a file schema.json
:
{
"person": {
"name": {
"type": "String",
"value": "Zazu"
},
"age": {
"type": "Option<u32>",
"value": 42
}
}
}
You can use a JSON pointer to specify the field for extracting a token or literal from JSON at compile time:
#![feature(proc_macro)]
extern crate static_json_pointer;
use static_json_pointer::json_token;
// let name = String::from("Zazu");
let name = json_token!("schema.json", "/person/name/type")::from(json_literal!("schema.json", "/person/name/value"));
// let age = Option<u32>::from(42);
let age = json_token!("schema.json", "/person/age/type")::from(json_literal!("schema.json", "/person/age/value"));
assert_eq!(name, "Zazu".to_string());
assert_eq!(age, Some(42));
The deserialized JSON is cached during build to prevent redundant reading and parsing during build.
Dependencies
~0.7–1.2MB
~26K SLoC