Trait devise::FromMeta

pub trait FromMeta: Sized {
    fn from_meta(meta: MetaItem<'_>) -> Result<Self, Diagnostic>;

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

Required Methods

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

Provided Methods

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

fn from_attrs(
    name: &str,
    attrs: &[Attribute]
) -> Option<Result<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 isize

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

impl FromMeta for bool

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

impl FromMeta for usize

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

impl FromMeta for String

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

Implementors

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