Enum yaccas::parser::Result

pub enum Result {
    Success(Vec<String>),
    Aborted(&'static str),
    NotSufficient,
    InvalidArgument,
    InvalidValue,
}

An enum of all possible results after parsing.

Example

use yaccas::arguments::{Command, Flag, Value};
use yaccas::parser::{Parser, FreeArgumentSupport, Result};
use yaccas::scanner::Unix;

let mut parser = Parser::default();

let flag = Flag::default();
let value = Value::new::<u32>();
let command = Command::new(|| Some("A fancy name for abort"));

parser.register(&["option", "o1", "o2"], flag);
parser.register(&["abort"], command);
parser.register(&["value", "v"], value);

assert_eq!(parser.parse(Unix::new(&["-value", "not_a_number"])), Result::InvalidValue);
assert_eq!(parser.parse(Unix::new(&[""])), Result::NotSufficient);
assert_eq!(parser.parse(Unix::new(&["-value", "1", "free_variable"])), Result::Success(vec!["free_variable".to_owned()]));
assert_eq!(parser.parse(Unix::new(&["-abort"])), Result::Aborted("A fancy name for abort"));

parser.free_arguments = FreeArgumentSupport::None;
assert_eq!(parser.parse(Unix::new(&["-not_registered"])), Result::InvalidArgument);

Variants

Success(Vec<String>)

Parsing was successful, a list of free arguments is returned.

Aborted(&'static str)

A registered Command aborted the parsing.

NotSufficient

A registered Value got neither a value from Scanner nor a default value.

InvalidArgument

An unknown name appears which could not be parsed as free argument.

InvalidValue

A registered Value got a value not matching its type and no default value was set.

Trait Implementations

impl Debug for Result

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl PartialEq for Result

fn eq(&self, __arg_0: &Result) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &Result) -> bool

This method tests for !=.

impl Eq for Result