#[non_exhaustive]pub enum ValueSource {
DefaultValue,
EnvVariable,
CommandLine,
}
Expand description
Origin of the argument’s value
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
DefaultValue
Value came Arg::default_value
EnvVariable
Value came [Arg::env
][crate::Arg::env]
CommandLine
Value was passed in on the command-line
Trait Implementations§
§impl Clone for ValueSource
impl Clone for ValueSource
§fn clone(&self) -> ValueSource
fn clone(&self) -> ValueSource
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read more§impl Debug for ValueSource
impl Debug for ValueSource
§impl Ord for ValueSource
impl Ord for ValueSource
§impl PartialEq for ValueSource
impl PartialEq for ValueSource
§fn eq(&self, other: &ValueSource) -> bool
fn eq(&self, other: &ValueSource) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.§impl PartialOrd for ValueSource
impl PartialOrd for ValueSource
§fn partial_cmp(&self, other: &ValueSource) -> Option<Ordering>
fn partial_cmp(&self, other: &ValueSource) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for
self
and other
) and is used by the <=
operator. Read moreimpl Copy for ValueSource
impl Eq for ValueSource
impl StructuralEq for ValueSource
impl StructuralPartialEq for ValueSource
Auto Trait Implementations§
impl RefUnwindSafe for ValueSource
impl Send for ValueSource
impl Sync for ValueSource
impl Unpin for ValueSource
impl UnwindSafe for ValueSource
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
§impl<T> Clamp for Twhere
T: PartialOrd,
impl<T> Clamp for Twhere
T: PartialOrd,
§fn clamp_range(self, range: impl FixedRangeBounds<Self>) -> Selfwhere
Self: Clone,
fn clamp_range(self, range: impl FixedRangeBounds<Self>) -> Selfwhere
Self: Clone,
Clamps a value in range. Read more
§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
§impl<T> CompatExt for T
impl<T> CompatExt for T
§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Convert
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Convert
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.§impl<T> DowncastSync for T
impl<T> DowncastSync for T
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Checks if this value is equivalent to the given key. Read more
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.