tailcall-valid

This crate helps to collect all possible errors instead of returning the first error encountered. This is useful when you want to know all the errors in a single go.

Valid could be initiated with an Option, Result, success, or a failure.

Examples

From success

use tailcall_valid::*;

fn main() {
    let result: Valid<i32, &str> = Valid::succeed(1);
    assert_eq!(result, Valid::succeed(1));
}

From failure

use tailcall_valid::*;

fn main() {
    let err = "Expected a value";
    let result: Valid<i32, &str> = Valid::fail(err);
    assert_eq!(result, Valid::from_vec_cause(vec![Cause::new(err)]));
}

From Option

use tailcall_valid::*;

fn main() {
    // Case when Option is None
    let err = "Expected a value";
    let option: Option<i32> = None;
    let result = Valid::from_option(option, err);
    assert_eq!(result, Valid::from_vec_cause(vec![Cause::new(err)]));

    // Case when Option is Some
    let option: Option<i32> = Some(1);
    let result = Valid::from_option(option, err);
    assert_eq!(result, Valid::succeed(1));
}

From Result

use tailcall_valid::*;

fn main() {
    // Case when Result is Err
    let err = "Expected a value";
    let result: Result<i32, &str> = Err(err);
    let result = result.map_err(ValidationError::new);
    let result = Valid::from(result);
    assert_eq!(result, Valid::from_vec_cause(vec![Cause::new(err)]));

    // Case when Result is Ok
    let result: Result<i32, &str> = Ok(1);
    let result = result.map_err(ValidationError::new);
    let result = Valid::from(result);
    assert_eq!(result, Valid::succeed(1));
}