Enum Expr 

pub enum Expr {
    Literal(Literal),
    FunctionCall {
        name: Ident,
        args: Vec<Expr>,
        span: Span,
    },
    Array {
        elements: Vec<Expr>,
        span: Span,
    },
    NamedArg {
        name: Ident,
        value: Box<Expr>,
        span: Span,
    },
    Ident(Ident),
}

An expression (used in attribute arguments).

Variants

Literal(Literal)

A literal value.

FunctionCall

A function call: name(arg1, arg2, ...).

Fields

name: Ident

Function name.

args: Vec<Expr>

Arguments.

span: Span

Span of the entire call.

Array

An array: [item1, item2, ...].

Fields

elements: Vec<Expr>

Array elements.

span: Span

Span of the entire array.

NamedArg

A named argument: name: value.

Fields

name: Ident

Argument name.

value: Box<Expr>

Argument value.

span: Span

Span of the entire named argument.

Ident(Ident)

An identifier reference.

Implementations

impl Expr

pub fn span(&self) -> Span

Returns the span of this expression.

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Expr

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Expr

fn eq(&self, other: &Expr) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Expr