use super::*;
#[derive(Copy, Clone, Debug, PartialEq, Ord, Eq, PartialOrd)]
pub(crate) enum UnstableFeature {
LogicalOperators,
UserDefinedFunction,
WhichFunction,
}
impl Display for UnstableFeature {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
match self {
Self::LogicalOperators => write!(
f,
"the logical operators `&&` and `||` are currently unstable"
),
Self::UserDefinedFunction => {
write!(f, "user-defined functions are currently unstable")
}
Self::WhichFunction => write!(f, "the `which()` function is currently unstable"),
}
}
}