Struct easy_args::spec::ArgSpec

pub struct ArgSpec { /* fields omitted */ }

Specifies the valid arguments of the program and is used to parse the command-line arguments into an [Arg].

Implementations

impl ArgSpec

pub fn build() -> ArgSpecBuilder

Creates an ArgSpecBuilder that can be used to build the ArgSpec.

Example

use easy_args::spec::ArgSpec;

let spec = ArgSpec::build()
    .boolean("arg1")
    .done()
    .unwrap();

pub fn has_arg(&self, name: impl Into<String>, ty: ArgType) -> bool

Determines if an argument of a given name and ArgType exists within the ArgSpec.

Example

use easy_args::spec::{ArgSpec, ArgType};

let spec = ArgSpec::build()
    .string("username")
    .done()
    .unwrap();
if spec.has_arg("username", ArgType::String) {
    let args = spec.parse().unwrap();
    if let Some(username) = args.string("username") {
        // do something with username
    }
}

pub fn parse(&self) -> Result<Args>

Parses the command-line arguments and Returns [Ok(Args)] if there were no parse errors and [Err(Error)] if otherwise.

Example

use easy_args::spec::ArgSpec;

let spec = ArgSpec::build()
    .boolean("vsync")
    .done()
    .unwrap();
match spec.parse() {
    Ok(args) => {
        // do stuff with the arguments
    }
    Err(err) => eprintln!("{:?}", err),
}

Trait Implementations

impl Debug for ArgSpec

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.