Trait FromDeriveInput

pub trait FromDeriveInput: Sized {
    // Provided methods
    fn from_derive_input(input: &DeriveInput) -> Result<Self> { ... }
    fn from_union(
        attrs: &Vec<Attribute>,
        vis: &Visibility,
        ident: &Ident,
        generics: &Generics,
        input: &DataUnion,
    ) -> Result<Self> { ... }
    fn from_enum(
        attrs: &Vec<Attribute>,
        vis: &Visibility,
        ident: &Ident,
        generics: &Generics,
        input: &DataEnum,
    ) -> Result<Self> { ... }
    fn from_struct(
        attrs: &Vec<Attribute>,
        vis: &Visibility,
        ident: &Ident,
        generics: &Generics,
        input: &DataStruct,
    ) -> Result<Self> { ... }
    fn parse(input: TokenStream) -> Result<Self> { ... }
}

Creates an instance by parsing an entire proc-macro derive input, including the, identity, generics, and visibility of the type.

This trait should either be derived or manually implemented by a type in the proc macro crate which is directly using darling. It is unlikely that these implementations will be reusable across crates.

Provided Methods

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

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

fn from_union( attrs: &Vec<Attribute>, vis: &Visibility, ident: &Ident, generics: &Generics, input: &DataUnion, ) -> Result<Self>

fn from_enum( attrs: &Vec<Attribute>, vis: &Visibility, ident: &Ident, generics: &Generics, input: &DataEnum, ) -> Result<Self>

fn from_struct( attrs: &Vec<Attribute>, vis: &Visibility, ident: &Ident, generics: &Generics, input: &DataStruct, ) -> Result<Self>

fn parse(input: TokenStream) -> Result<Self>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl FromDeriveInput for ()

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

impl FromDeriveInput for DeriveInput

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

Implementors