Struct darling_core::util::Ignored

pub struct Ignored;

An efficient way of discarding data from an attribute.

All meta-items, fields, and variants will be successfully read into the Ignored struct, with all properties discarded.

Trait Implementations

impl Debug for Ignored

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Clone for Ignored

fn clone(&self) -> Ignored

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Ignored

impl PartialEq for Ignored

fn eq(&self, __arg_0: &Ignored) -> bool

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

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Eq for Ignored

impl Hash for Ignored

fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl FromMetaItem for Ignored

fn from_meta_item(_: &MetaItem) -> Result<Self>

Create an instance from a syn::MetaItem by dispatching to the format-appropriate trait function. This generally should not be overridden by implementers.

fn from_nested_meta_item(_: &NestedMetaItem) -> Result<Self>

fn from_word() -> Result<Self>

Create an instance from the presence of the word in the attribute with no additional options specified.

fn from_list(items: &[NestedMetaItem]) -> Result<Self>

Create an instance from a list of nested meta items.

fn from_value(value: &Lit) -> Result<Self>

Create an instance from a literal value of either foo = "bar" or foo("bar"). This dispatches to the appropriate method based on the type of literal encountered, and generally should not be overridden by implementers.

fn from_char(value: char) -> Result<Self>

Create an instance from a char literal in a value position.

fn from_string(value: &str) -> Result<Self>

Create an instance from a string literal in a value position.

fn from_bool(value: bool) -> Result<Self>

Create an instance from a bool literal in a value position.

impl FromDeriveInput for Ignored

fn from_derive_input(_: &DeriveInput) -> Result<Self>

Create an instance from syn::DeriveInput, or return an error.

impl FromField for Ignored

fn from_field(_: &Field) -> Result<Self>

impl FromVariant for Ignored

fn from_variant(_: &Variant) -> Result<Self>

Create an instance from syn::Variant, or return an error.