wca 0.46.0

The tool to make CLI ( commands user interface ). It is able to aggregate external binary applications, as well as functions, which are written in your language. 
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//! Using this feature, when calling a command with an invalid name, the error text will contain
//! a sentence with a correction, e.g. if you type :
//!
//! ```shell
//! cargo run --features on_unknown_suggest --example wca_suggest .echoooo
//! ```
//!
//! you will see the message :
//!
//! ```text
//! Validation error. Can not identify a command.
//! Details: Command not found. Maybe you mean `.echo`?
//! ```
//!
//! Otherwise
//!
//! ```text
//! Validation error. Can not identify a command.
//! Details: Command not found. Please use `.` command to see the list of available commands.
//! ```
//!

use wca :: { CommandsAggregator, Type, VerifiedCommand };

fn main() -> error_tools ::error ::untyped ::Result< () > 
{
  let ca = CommandsAggregator ::former()
  .command("echo")
  .hint("prints all subjects and properties")
  .subject()
  .kind(Type ::String)
  .optional(true)
  .end()
  .property("property")
  .hint("simple property")
  .kind(Type ::String)
  .optional(true)
  .end()
  .routine(|o: VerifiedCommand| {
   println!("= Args\n{:?}\n\n= Properties\n{:?}\n", o.args, o.props);
 })
  .end()
  .perform();

  let args: Vec< String > = std ::env ::args().skip(1).collect();
  ca.perform(args.join(" "))?;

  Ok(())
}