https://github.com/anowell/static-json-pointer

Rust macro to extract literals and tokens from JSON at compile time
https://github.com/anowell/static-json-pointer

Last synced: about 2 months ago
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Rust macro to extract literals and tokens from JSON at compile time

• Host: GitHub
• URL: https://github.com/anowell/static-json-pointer
• Owner: anowell
• License: mit
• Created: 2018-04-11T06:22:32.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2018-04-20T06:33:11.000Z (over 6 years ago)
• Last Synced: 2024-11-17T14:49:14.766Z (about 2 months ago)
• Language: Rust
• Homepage:
• Size: 9.77 KB
• Stars: 4
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
## static-json-pointer

Macro to extract Rust tokens and literals from a JSON schema

If you have a file `schema.json`:

```json

{

    "person": {

        "name": {

            "type": "String",

            "value": "Zazu"

        },

        "age": {

            "type": "Option",

            "value": 42

        }

    }

}

```

You can use a JSON pointer to specify the field for extracting a token or literal from JSON at compile time:

```rust

#![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::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.