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api-macro: add more standard Maybe methods

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Note that any methods added there should be oriented around
`Option`.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2020-12-18 12:25:56 +01:00 committed by Dietmar Maurer
parent 6b5bf36989
commit 357b3016d5
1 changed files with 21 additions and 0 deletions
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21
proxmox-api-macro/src/util.rs
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@ -584,6 +584,12 @@ pub enum Maybe<T> {
None, None,
} }
impl<T> Default for Maybe<T> {
fn default() -> Self {
Maybe::None
}
}
impl<T> Maybe<T> { impl<T> Maybe<T> {
pub fn as_ref(&self) -> Maybe<&T> { pub fn as_ref(&self) -> Maybe<&T> {
match self { match self {
@ -600,6 +606,13 @@ impl<T> Maybe<T> {
} }
} }
pub fn ok(self) -> Option<T> {
match self {
Maybe::Explicit(v) | Maybe::Derived(v) => Some(v),
Maybe::None => None,
}
}
pub fn ok_or_else<E, F>(self, other: F) -> Result<T, E> pub fn ok_or_else<E, F>(self, other: F) -> Result<T, E>
where where
F: FnOnce() -> E, F: FnOnce() -> E,
@ -613,6 +626,14 @@ impl<T> Maybe<T> {
pub fn is_none(&self) -> bool { pub fn is_none(&self) -> bool {
matches!(self, Maybe::None) matches!(self, Maybe::None)
} }
pub fn is_explicit(&self) -> bool {
matches!(self, Maybe::Explicit(_))
}
pub fn take(&mut self) -> Self {
std::mem::take(self)
}
} }
impl<T> Into<Option<T>> for Maybe<T> { impl<T> Into<Option<T>> for Maybe<T> {