Struct FromAttributesOptions

pub struct FromAttributesOptions {
    pub base: OuterFrom,
}

Receiver for derived FromAttributes impls.

Fields

base: OuterFrom

Implementations

impl FromAttributesOptions

pub fn new(di: &DeriveInput) -> Result<Self>

fn is_newtype(&self) -> bool

Trait Implementations

impl<'a> From<&'a FromAttributesOptions> for FromAttributesImpl<'a>

fn from(v: &'a FromAttributesOptions) -> Self

Converts to this type from the input type.

impl ParseAttribute for FromAttributesOptions

fn parse_nested(&mut self, mi: &Meta) -> Result<()>

Read a meta-item, and apply its values to the current instance.

fn parse_attributes(self, attrs: &[Attribute]) -> Result<Self>

impl ParseData for FromAttributesOptions

fn parse_variant(&mut self, variant: &Variant) -> Result<()>

Apply the next found variant to the object, returning an error if parsing goes wrong.

fn parse_field(&mut self, field: &Field) -> Result<()>

Apply the next found struct field to the object, returning an error if parsing goes wrong.

fn validate_body(&self, errors: &mut Accumulator)

Perform validation checks that require data from more than one field or variant. The default implementation does no validations. Implementors can override this method as appropriate for their use-case.

fn parse_body(self, body: &Data) -> Result<Self>

impl ToTokens for FromAttributesOptions

fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream.

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object.

fn into_token_stream(self) -> TokenStream

where Self: Sized,

Convert self directly into a TokenStream object.