Enum FilterExpr 

#[non_exhaustive]
pub enum FilterExpr {
    Unary(UnOp, Box<FilterExpr>),
    Binary(Box<FilterExpr>, BinOp, Box<FilterExpr>),
    Path(SubPath),
    Lit(ExprLit),
    Parens(Paren, Box<FilterExpr>),
}

An expression inside a filter directive, or any sub-expression in that tree

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Unary(UnOp, Box<FilterExpr>)

An expression with an unary operator before it, such as !(true)

Binary(Box<FilterExpr>, BinOp, Box<FilterExpr>)

Two expressions with a binary operator joining them, such as 1 + 4

Path(SubPath)

A SubPath expression, such as the @.a in @.a == 1

Lit(ExprLit)

A literal value, such as null or 'bar'

Parens(Paren, Box<FilterExpr>)

An expression wrapped in parenthesis, such as the (1 + 2) in (1 + 2) * 3

Trait Implementations

impl Spanned for FilterExpr

Available on crate feature spanned only.

fn span(&self) -> Span

Get the source span of this item