ltl_args/
error.rs

1use std::{error::Error, fmt::Display};
2
3#[derive(Debug)]
4pub enum ParseError {
5    MissingProgramName,
6    BadInternalState,
7    MalformedOption(String),
8    UnexpectedOption(String),
9    MissingValue(String),
10}
11
12impl Display for ParseError {
13    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
14        match self {
15            ParseError::MissingProgramName => {
16                write!(f, "missing expected first argument (program name)")
17            }
18            ParseError::BadInternalState => {
19                write!(f, "bad internal state, possibly bug in opts lib")
20            }
21            ParseError::MalformedOption(arg) => write!(f, "malformed option; got '{}'", arg),
22            ParseError::UnexpectedOption(arg) => write!(f, "unexpected option; got '{}'", arg),
23            ParseError::MissingValue(arg) => write!(f, "missinfg value for {}", arg),
24        }
25    }
26}
27
28impl Error for ParseError {}
29
30#[derive(Debug)]
31pub enum ValueError {
32    WrongOptionType,
33    ConversionError(String),
34}
35
36impl Display for ValueError {
37    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
38        match self {
39            ValueError::WrongOptionType => write!(f, "wrong option type"),
40            ValueError::ConversionError(val) => {
41                write!(f, "error converting value '{}'", val)
42            }
43        }
44    }
45}
46
47impl Error for ValueError {}
ltl_args/error.rs

ltl_args/
error.rs
