Trait macroific::attr_parse::FromExpr

source ·

pub trait FromExpr: Sized {
    // Required method
    fn from_expr(expr: Expr) -> Result<Self, Error>;

    // Provided method
    fn boolean() -> Option<Self> { ... }
}

Available on crate feature attr_parse only.

Expand description

Construct this type from an Expr.

Required Methods§

source

fn from_expr(expr: Expr) -> Result<Self, Error>

Provided Methods§

source

fn boolean() -> Option<Self>

Construct a positive boolean representation

Object Safety§

This trait is not object safe.

Implementations on Foreign Types§

source §

Trait macroific::attr_parse::FromExpr

Required Methods§

fn from_expr(expr: Expr) -> Result<Self, Error>

Provided Methods§

fn boolean() -> Option<Self>

Object Safety§

Implementations on Foreign Types§

impl FromExpr for Meta

fn from_expr(expr: Expr) -> Result<Meta, Error>

impl FromExpr for Expr

fn from_expr(expr: Expr) -> Result<Expr, Error>

impl FromExpr for GenericParam

fn from_expr(expr: Expr) -> Result<GenericParam, Error>

impl FromExpr for TypeParamBound

fn from_expr(expr: Expr) -> Result<TypeParamBound, Error>

impl FromExpr for WherePredicate

fn from_expr(expr: Expr) -> Result<WherePredicate, Error>

impl FromExpr for Lit

fn from_expr(expr: Expr) -> Result<Lit, Error>

impl FromExpr for Visibility

fn from_expr(expr: Expr) -> Result<Visibility, Error>

impl FromExpr for Type

fn from_expr(expr: Expr) -> Result<Type, Error>

impl FromExpr for bool

fn from_expr(expr: Expr) -> Result<bool, Error>

fn boolean() -> Option<bool>

impl FromExpr for char

fn from_expr(expr: Expr) -> Result<char, Error>

impl FromExpr for f32

fn from_expr(expr: Expr) -> Result<f32, Error>

impl FromExpr for f64

fn from_expr(expr: Expr) -> Result<f64, Error>

impl FromExpr for i8

fn from_expr(expr: Expr) -> Result<i8, Error>

impl FromExpr for i16

fn from_expr(expr: Expr) -> Result<i16, Error>

impl FromExpr for i32

fn from_expr(expr: Expr) -> Result<i32, Error>

impl FromExpr for i64

fn from_expr(expr: Expr) -> Result<i64, Error>

impl FromExpr for isize

fn from_expr(expr: Expr) -> Result<isize, Error>

impl FromExpr for u8

fn from_expr(expr: Expr) -> Result<u8, Error>

impl FromExpr for u16

fn from_expr(expr: Expr) -> Result<u16, Error>

impl FromExpr for u32

fn from_expr(expr: Expr) -> Result<u32, Error>

impl FromExpr for u64

fn from_expr(expr: Expr) -> Result<u64, Error>

impl FromExpr for usize

fn from_expr(expr: Expr) -> Result<usize, Error>

impl FromExpr for String

fn from_expr(expr: Expr) -> Result<String, Error>

impl FromExpr for Ident

fn from_expr(expr: Expr) -> Result<Ident, Error>

impl FromExpr for Literal

fn from_expr(expr: Expr) -> Result<Literal, Error>

impl FromExpr for TokenStream

fn from_expr(expr: Expr) -> Result<TokenStream, Error>

impl FromExpr for MetaList

fn from_expr(expr: Expr) -> Result<MetaList, Error>

impl FromExpr for MetaNameValue

fn from_expr(expr: Expr) -> Result<MetaNameValue, Error>

impl FromExpr for ExprArray

fn from_expr(expr: Expr) -> Result<ExprArray, Error>

impl FromExpr for ExprAssign

fn from_expr(expr: Expr) -> Result<ExprAssign, Error>

impl FromExpr for ExprAsync

fn from_expr(expr: Expr) -> Result<ExprAsync, Error>

impl FromExpr for ExprAwait

fn from_expr(expr: Expr) -> Result<ExprAwait, Error>

impl FromExpr for ExprBinary

fn from_expr(expr: Expr) -> Result<ExprBinary, Error>

impl FromExpr for ExprBlock

fn from_expr(expr: Expr) -> Result<ExprBlock, Error>

impl FromExpr for ExprBreak

fn from_expr(expr: Expr) -> Result<ExprBreak, Error>

impl FromExpr for ExprCall

fn from_expr(expr: Expr) -> Result<ExprCall, Error>