Struct FilterExpr 

pub struct FilterExpr { /* private fields */ }

The filter expression.

Implementations

impl FilterExpr

pub fn parse(expr: &str) -> Result<Self, Error>

Parse the filter expression.

use filter_expr::FilterExpr;
 
let filter_expr = FilterExpr::parse("name = 'John' AND age > 18").unwrap();

pub fn new(expr: Option<Expr>) -> Self

Create a new filter expression with the given expression.

pub fn expr(&self) -> Option<&Expr>

Get the expression of the filter.

pub fn transform<F: Transform>(self, transformer: &mut F) -> Self

Transform the filter expression.

pub async fn eval(&self, ctx: &dyn Context) -> Result<bool, Error>

Evaluate the filter expression in the given context.