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making optionality a bool

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nora 2021-10-01 22:08:20 +02:00
parent 346c8835cd
commit a33b81c58e
5 changed files with 47 additions and 34 deletions
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18
src/macros.rs
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@ -1,12 +1,20 @@
#[macro_export]
macro_rules! arg {
// implicit optional
($name:ident: $long:literal, $short:literal -> $result:ty) => {
arg!(@$name: ($long, ::std::option::Option::Some($short)) -> $result);
arg!(@$name: ($long, ::std::option::Option::Some($short)) -> $result, false);
};
($name:ident: $long:literal -> $result:ty) => {
arg!(@$name: ($long, ::std::option::Option::None) -> $result);
arg!(@$name: ($long, ::std::option::Option::None) -> $result, false);
};
(@$name:ident: ($long:literal, $short:expr) -> $result:ty) => {
// required
($name:ident: $long:literal, $short:literal -> $result:ty, required) => {
arg!(@$name: ($long, ::std::option::Option::Some($short)) -> $result, true);
};
($name:ident: $long:literal -> $result:ty, required) => {
arg!(@$name: ($long, ::std::option::Option::None) -> $result, true);
};
(@$name:ident: ($long:literal, $short:expr) -> $result:ty, $required:literal) => {
#[derive(Default)]
struct $name;
@ -20,6 +28,10 @@ macro_rules! arg {
fn short() -> Option<char> {
$short
}
fn required() -> bool {
$required
}
}
};
}