Enum amplify_syn::ArgValueReq [−][src]
pub enum ArgValueReq { Required { default: Option<ArgValue>, class: ValueClass, }, Optional(ValueClass), Prohibited, }
Expand description
Requirements for attribute or named argument value presence
Variants
Argument must hold a value with the provided class
Show fields
Fields of Required
Optional(ValueClass)
Argument or an attribute may or may not hold a value
Argument or an attribute must not hold a value
Implementations
impl ArgValueReq
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impl ArgValueReq
[src]pub fn with_default(default: impl Into<ArgValue>) -> ArgValueReq
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pub fn with_default(default: impl Into<ArgValue>) -> ArgValueReq
[src]Constructs argument requirements object with default value
pub fn required(class: ValueClass) -> ArgValueReq
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pub fn required(class: ValueClass) -> ArgValueReq
[src]Construct ArgValueReq::Required
variant with no default value
pub fn value_class(&self) -> Option<ValueClass>
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pub fn value_class(&self) -> Option<ValueClass>
[src]Returns value class requirements, if any
pub fn default_value(&self) -> ArgValue
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pub fn default_value(&self) -> ArgValue
[src]Returns default argument value. If not default is provided within the
requirement, returns ArgValue::None
(since this is de facto
default value for any argument).
pub fn is_required(&self) -> bool
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pub fn is_required(&self) -> bool
[src]Determines whether argument is required to have a value
Trait Implementations
impl Clone for ArgValueReq
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impl Clone for ArgValueReq
[src]fn clone(&self) -> ArgValueReq
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fn clone(&self) -> ArgValueReq
[src]Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
1.0.0[src]Performs copy-assignment from source
. Read more
Auto Trait Implementations
impl RefUnwindSafe for ArgValueReq
impl !Send for ArgValueReq
impl !Sync for ArgValueReq
impl Unpin for ArgValueReq
impl UnwindSafe for ArgValueReq
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
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pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
[src]type Owned = T
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn to_owned(&self) -> T
[src]Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
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pub fn clone_into(&self, target: &mut T)
[src]🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more