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macros.rs
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macros.rs
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/// Create mappings for enum variants and corresponding string representations
#[macro_export]
macro_rules! make_lily_str_map {
($(#[$outer:meta])* $name:ident;
$err:ident::$err_variant:ident;
$($(#[$inner:meta])* $key:ident, $main:literal $(, $string:literal)*);*;
) => {
#[derive(Debug, Clone, PartialEq, Eq)]
$(#[$outer])*
pub enum $name {
$($(#[$inner])* $key),*
}
impl $crate::ListOptions for $name {
fn list_options() {
$(output!("{} {} {}", stringify!($key), $main, stringify!($($string)*));)*
}
}
impl std::str::FromStr for $name {
type Err = $err;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
$($main | stringify!($key) $(|$string)* => Ok($name::$key),)*
_ => Err($err::$err_variant(s.into())),
}
}
}
impl std::convert::TryFrom<&str> for $name {
type Error = $err;
fn try_from(value: &str) -> Result<Self, Self::Error> {
<Self as std::str::FromStr>::from_str(value)
}
}
impl TryFrom<$name> for &str {
type Error = String;
fn try_from(value: $name) -> Result<Self, Self::Error> {
match value {
$($name::$key => Ok($main)),*
}
}
}
impl clap::ValueEnum for $name {
fn value_variants<'a>() -> &'a [Self] {
&[$($name::$key),*]
}
fn to_possible_value(&self) -> Option<clap::builder::PossibleValue> {
Some(match self {
$($name::$key => clap::builder::PossibleValue::new($main).help(stringify!($key))),*
})
}
}
};
}
#[macro_export]
macro_rules! output {
($($arg:tt)*) => { println!($($arg)*) };
}
#[macro_export]
macro_rules! echoinfo {
($($arg:tt)*) => { eprintln!(":: {}", format!($($arg)*)) };
}
#[macro_export]
macro_rules! echoerr {
($($arg:tt)*) => { eprintln!("!! {}", format!($($arg)*)) }
}