cluStaticData 1.2.0

Initializers of static values. Manual initialization, automatic initialization.
Documentation 
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#[macro_use]
extern crate cluStaticData;
use cluStaticData::err::StaticErr;

static_data! {
	pub(crate) static ref TEST: TestValue = TestValue::Unk;
}

#[derive(Debug, Clone, Copy, PartialEq)]
pub enum TestValue {
	Unk,
	RuntimeValue(usize),
}

fn main() {
	assert_eq!(*TEST, TestValue::Unk);
	println!("OK #1 {:?}", TEST);
	
	let result = TEST.set(TestValue::RuntimeValue(10));
	assert_eq!(result.is_ok(), true);
	println!("OK #2 {:?}", TEST);
	
	let result = TEST.set(TestValue::RuntimeValue(20));
	assert_eq!(result.is_ok(), false);
	assert_eq!(*TEST, TestValue::RuntimeValue(10));
	println!("OK #3 {:?}", TEST);
	
	let result = TEST.replace(TestValue::Unk);
	assert_eq!(result, Err(StaticErr::prev(TestValue::Unk)));
	println!("OK #4 {:?}", result);
}