Trait devise::FromMeta

pub trait FromMeta: Sized {
    // Required method
    fn from_meta(meta: &MetaItem) -> Result<Self, Diagnostic>;

    // Provided methods
    fn from_attr(attr: &Attribute) -> Result<Self, Diagnostic> { ... }
    fn from_attrs(
        name: &str,
        attrs: &[Attribute]
    ) -> Result<Vec<Self, Global>, Diagnostic> { ... }
    fn one_from_attrs(
        name: &str,
        attrs: &[Attribute]
    ) -> Result<Option<Self>, Diagnostic> { ... }
    fn default() -> Option<Self> { ... }
}

Required Methods

fn from_meta(meta: &MetaItem) -> Result<Self, Diagnostic>

Provided Methods

fn from_attr(attr: &Attribute) -> Result<Self, Diagnostic>

fn from_attrs( name: &str, attrs: &[Attribute] ) -> Result<Vec<Self, Global>, Diagnostic>

fn one_from_attrs( name: &str, attrs: &[Attribute] ) -> Result<Option<Self>, Diagnostic>

fn default() -> Option<Self>

Implementations on Foreign Types

impl<T> FromMeta for Option<T>where T: FromMeta,

fn from_meta(meta: &MetaItem) -> Result<Option<T>, Diagnostic>

fn default() -> Option<Option<T>>

impl FromMeta for String

fn from_meta(meta: &MetaItem) -> Result<String, Diagnostic>

impl FromMeta for usize

fn from_meta(meta: &MetaItem) -> Result<usize, Diagnostic>

impl FromMeta for isize

fn from_meta(meta: &MetaItem) -> Result<isize, Diagnostic>

impl FromMeta for bool

fn from_meta(meta: &MetaItem) -> Result<bool, Diagnostic>

Implementors

impl FromMeta for Expr

impl FromMeta for TokenStream

impl<T> FromMeta for SpanWrapped<T>where T: FromMeta,

impl<T, P> FromMeta for Punctuated<T, P>where T: Parse, P: Parse,