diff options
Diffstat (limited to 'vendor/clap_builder/src/builder/resettable.rs')
| -rw-r--r-- | vendor/clap_builder/src/builder/resettable.rs | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/vendor/clap_builder/src/builder/resettable.rs b/vendor/clap_builder/src/builder/resettable.rs deleted file mode 100644 index 0572740..0000000 --- a/vendor/clap_builder/src/builder/resettable.rs +++ /dev/null @@ -1,212 +0,0 @@ -// Unlike `impl Into<Option<T>>` or `Option<impl Into<T>>`, this isn't ambiguous for the `None` -// case. - -use crate::builder::ArgAction; -use crate::builder::OsStr; -use crate::builder::Str; -use crate::builder::StyledStr; -use crate::builder::ValueHint; -use crate::builder::ValueParser; -use crate::builder::ValueRange; - -/// Clearable builder value -/// -/// This allows a builder function to both accept any value that can [`Into::into`] `T` (like -/// `&str` into `OsStr`) as well as `None` to reset it to the default. This is needed to -/// workaround a limitation where you can't have a function argument that is `impl Into<Option<T>>` -/// where `T` is `impl Into<S>` accept `None` as its type is ambiguous. -/// -/// # Example -/// -/// ```rust -/// # use clap_builder as clap; -/// # use clap::Command; -/// # use clap::Arg; -/// fn common() -> Command { -/// Command::new("cli") -/// .arg(Arg::new("input").short('i').long("input")) -/// } -/// let mut command = common(); -/// command.mut_arg("input", |arg| arg.short(None)); -/// ``` -#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)] -pub enum Resettable<T> { - /// Overwrite builder value - Value(T), - /// Reset builder value - Reset, -} - -impl<T> Resettable<T> { - pub(crate) fn into_option(self) -> Option<T> { - match self { - Self::Value(t) => Some(t), - Self::Reset => None, - } - } -} - -impl<T> From<T> for Resettable<T> { - fn from(other: T) -> Self { - Self::Value(other) - } -} - -impl<T> From<Option<T>> for Resettable<T> { - fn from(other: Option<T>) -> Self { - match other { - Some(inner) => Self::Value(inner), - None => Self::Reset, - } - } -} - -/// Convert to the intended resettable type -pub trait IntoResettable<T> { - /// Convert to the intended resettable type - fn into_resettable(self) -> Resettable<T>; -} - -impl IntoResettable<char> for Option<char> { - fn into_resettable(self) -> Resettable<char> { - match self { - Some(s) => Resettable::Value(s), - None => Resettable::Reset, - } - } -} - -impl IntoResettable<usize> for Option<usize> { - fn into_resettable(self) -> Resettable<usize> { - match self { - Some(s) => Resettable::Value(s), - None => Resettable::Reset, - } - } -} - -impl IntoResettable<ArgAction> for Option<ArgAction> { - fn into_resettable(self) -> Resettable<ArgAction> { - match self { - Some(s) => Resettable::Value(s), - None => Resettable::Reset, - } - } -} - -impl IntoResettable<ValueHint> for Option<ValueHint> { - fn into_resettable(self) -> Resettable<ValueHint> { - match self { - Some(s) => Resettable::Value(s), - None => Resettable::Reset, - } - } -} - -impl IntoResettable<ValueParser> for Option<ValueParser> { - fn into_resettable(self) -> Resettable<ValueParser> { - match self { - Some(s) => Resettable::Value(s), - None => Resettable::Reset, - } - } -} - -impl IntoResettable<StyledStr> for Option<&'static str> { - fn into_resettable(self) -> Resettable<StyledStr> { - match self { - Some(s) => Resettable::Value(s.into()), - None => Resettable::Reset, - } - } -} - -impl IntoResettable<OsStr> for Option<&'static str> { - fn into_resettable(self) -> Resettable<OsStr> { - match self { - Some(s) => Resettable::Value(s.into()), - None => Resettable::Reset, - } - } -} - -impl IntoResettable<Str> for Option<&'static str> { - fn into_resettable(self) -> Resettable<Str> { - match self { - Some(s) => Resettable::Value(s.into()), - None => Resettable::Reset, - } - } -} - -impl<T> IntoResettable<T> for Resettable<T> { - fn into_resettable(self) -> Resettable<T> { - self - } -} - -impl IntoResettable<char> for char { - fn into_resettable(self) -> Resettable<char> { - Resettable::Value(self) - } -} - -impl IntoResettable<usize> for usize { - fn into_resettable(self) -> Resettable<usize> { - Resettable::Value(self) - } -} - -impl IntoResettable<ArgAction> for ArgAction { - fn into_resettable(self) -> Resettable<ArgAction> { - Resettable::Value(self) - } -} - -impl IntoResettable<ValueHint> for ValueHint { - fn into_resettable(self) -> Resettable<ValueHint> { - Resettable::Value(self) - } -} - -impl<I: Into<ValueRange>> IntoResettable<ValueRange> for I { - fn into_resettable(self) -> Resettable<ValueRange> { - Resettable::Value(self.into()) - } -} - -impl<I: Into<ValueParser>> IntoResettable<ValueParser> for I { - fn into_resettable(self) -> Resettable<ValueParser> { - Resettable::Value(self.into()) - } -} - -impl<I: Into<String>> IntoResettable<String> for I { - fn into_resettable(self) -> Resettable<String> { - Resettable::Value(self.into()) - } -} - -impl<I: Into<StyledStr>> IntoResettable<StyledStr> for I { - fn into_resettable(self) -> Resettable<StyledStr> { - Resettable::Value(self.into()) - } -} - -impl<I: Into<OsStr>> IntoResettable<OsStr> for I { - fn into_resettable(self) -> Resettable<OsStr> { - Resettable::Value(self.into()) - } -} - -impl<I: Into<Str>> IntoResettable<Str> for I { - fn into_resettable(self) -> Resettable<Str> { - Resettable::Value(self.into()) - } -} - -impl<I: Into<crate::Id>> IntoResettable<crate::Id> for I { - fn into_resettable(self) -> Resettable<crate::Id> { - Resettable::Value(self.into()) - } -} |