Enum docopt::Value [−][src]
A matched command line value.
The value can be a boolean, counted repetition, a plain string or a list of strings.
The various as_{bool,count,str,vec}
methods provide convenient access
to values without destructuring manually.
Variants
Switch(bool)
A boolean value from a flag that has no argument.
The presence of a flag means true
and the absence of a flag
means false
.
Counted(u64)
The number of occurrences of a repeated flag.
A positional or flag argument.
This is None
when the positional argument or flag is not present.
Note that it is possible to have Some("")
for a present but empty
argument.
A List of positional or flag arguments.
This list may be empty when no arguments or flags are present.
Implementations
impl Value
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pub fn as_bool(&self) -> bool
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Returns the value as a bool.
Counted repetitions are false
if 0
and true
otherwise.
Plain strings are true
if present and false
otherwise.
Lists are true
if non-empty and false
otherwise.
pub fn as_count(&self) -> u64
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Returns the value as a count of the number of times it occurred.
Booleans are 1
if true
and 0
otherwise.
Plain strings are 1
if present and 0
otherwise.
Lists correspond to its length.
pub fn as_str(&self) -> &str
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Returns the value as a string.
All values return an empty string except for a non-empty plain string.
pub fn as_vec(&self) -> Vec<&str>
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Returns the value as a list of strings.
Booleans, repetitions and empty strings correspond to an empty list.
Plain strings correspond to a list of length 1
.
Trait Implementations
impl Clone for Value
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impl Debug for Value
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impl PartialEq<Value> for Value
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impl StructuralPartialEq for Value
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Auto Trait Implementations
impl RefUnwindSafe for Value
impl Send for Value
impl Sync for Value
impl Unpin for Value
impl UnwindSafe for Value
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,