Enum darling::usage::Purpose [−][src]
pub enum Purpose { BoundImpl, Declare, }
Expand description
The goal of tracing generic parameter usage.
Not all uses of type parameters imply a need to add bounds to a generated trait impl.
For example, a field of type <Vec<T> as a::b::Trait>::Associated
does not need a
where T: Serialize
bound in serde
.
However, a proc macro that is attempting to generate a helper struct would need to
know about this usage, or else the generated code would reference an unknown type T
and fail to compile.
Variants
The tracing is being used to generate an impl
block.
Uses such as syn::TypePath.qself
will not be returned.
The tracing is being used to generate a new struct or enum.
All uses will be returned.
Trait Implementations
impl Copy for Purpose
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impl Eq for Purpose
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impl StructuralEq for Purpose
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impl StructuralPartialEq for Purpose
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Auto Trait Implementations
impl RefUnwindSafe for Purpose
impl Send for Purpose
impl Sync for Purpose
impl Unpin for Purpose
impl UnwindSafe for Purpose
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