Trait macro_input_core::FromLit

pub trait FromLit: Sized {
    pub fn from(lit: Option<Lit>) -> Result<Self>;
}

a trait for extracting a value from a literal

FromMeta is automatically implemented for all implementations

Required methods

pub fn from(lit: Option<Lit>) -> Result<Self>

extract the value

Errors

may return an Error if the literal doesn't contain the correct value

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Implementations on Foreign Types

impl FromLit for Option<Lit>

pub fn from(lit: Option<Lit>) -> Result<Self>

impl FromLit for String

pub fn from(lit: Option<Lit>) -> Result<Self>

impl FromLit for Vec<u8>

pub fn from(lit: Option<Lit>) -> Result<Self>

impl FromLit for u8

pub fn from(lit: Option<Lit>) -> Result<Self>

impl FromLit for char

pub fn from(lit: Option<Lit>) -> Result<Self>

impl FromLit for i32

pub fn from(lit: Option<Lit>) -> Result<Self>

impl FromLit for f32

pub fn from(lit: Option<Lit>) -> Result<Self>

impl FromLit for bool

pub fn from(lit: Option<Lit>) -> Result<Self>

impl<V: FromLit> FromLit for Option<V>

pub fn from(lit: Option<Lit>) -> Result<Self>

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Implementors

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