#value #generic #rusty #primitive #derive #primitive-integer #enums

rusty-value

Create a generic inspectable value from any rust type

10 releases (5 breaking)

0.6.0 Oct 18, 2022
0.5.1 Oct 12, 2022
0.4.2 Oct 5, 2022
0.3.0 Oct 5, 2022
0.1.0 Oct 3, 2022

#2638 in Rust patterns


Used in 4 crates (3 directly)

Apache-2.0

25KB
573 lines

Rusty Value

This crate adds a RustyValue trait that can be derived for all types (except unions) to create a generic value that represents a rust value. This can be used to implement serialization of types without having to rely on serde.

Usage

The trait RustyValue allows one to create a rusty_value::Value for any type that implements it. This trait can be derived if the derive feature is enabled.

use rusty_value::*;

#[derive(RustyValue)]
struct MyStruct {
  foo: String,
  bar: u8,
}

fn main() {
  let value = MyStruct {
    foo: "Hello World".to_string(),
    bar: 12,
  }.into_rusty_value();

  match value {
      Value::Primitive(p) => match p {
          rusty_value::Primitive::Integer(_) => println!("is an integer"),
          rusty_value::Primitive::Float(_) => println!("is a float"),
          rusty_value::Primitive::String(_) => println!("is a string"),
          rusty_value::Primitive::OsString(_) => println!("is a os string"),
          rusty_value::Primitive::Char(_) => println!("is a char"),
          rusty_value::Primitive::Bool(_) => println!("is a boolean"),
      },
      Value::Struct(s) => println!("is a struct with name {}", s.name),
      Value::Enum(e) => println!("is an enum with name {} of variant {}", e.name, e.variant),
      Value::Map(_) => println!("is a map"),
      Value::List(_) => println!("is a list"),
      Value::None => println!("is none"),
  }
}

Converting a type into a rusty value cannot fail as rusty_value::RustyValue is able to represent any safe rust data type. The trait RustyValue is already implemented for most std types and can therefore be easily derived.

Dependencies

~0–275KB