Enum darling_core::usage::Purpose

[−] Show declaration

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

BoundImpl

[−] Expand description

The tracing is being used to generate an impl block.

Uses such as syn::TypePath.qself will not be returned.

Declare

[−] Expand description

The tracing is being used to generate a new struct or enum.

All uses will be returned.

Trait Implementations

impl Clone for Purpose[+]

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fn clone(&self) -> Purpose[−]

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl Copy for Purpose

impl Debug for Purpose[+]

[+] Show hidden undocumented items

fn fmt(&self, f: &mut Formatter<'_>) -> Result[−]

Formats the value using the given formatter.

impl Eq for Purpose

impl From<Purpose> for Options[+]

[+] Show hidden undocumented items

fn from(purpose: Purpose) -> Self[−]

Performs the conversion.

impl PartialEq<Purpose> for Purpose[+]

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fn eq(&self, other: &Purpose) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

[+] Expand attributes

#[must_use]pub fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

impl StructuralEq for Purpose

impl StructuralPartialEq for Purpose