Module filter 

Haystack filter parsing and evaluation

Haystack filters are used to evaluate simple expressions against Dict and Filter Paths.

Examples

// Find if a Dictionary contains a `dis` value equals to `Test`
use libhaystack::dict;
use libhaystack::val::*;
use libhaystack::filter::{Filter, Filtered};

let filter = Filter::try_from(r#"site and dis=="Test""#).expect("Filter");
let dict = dict!{"site" => Value::make_marker(), "dis" => Value::from("Test")};

assert_eq!(dict.filter(&filter), true);

Re-exports

pub use eval::Eval;

pub use filtered::Filtered;

pub use filtered::ListFiltered;

pub use resolver::PathResolver;

Modules

eval

Haystack filter evaluation

filtered

Haystack Filtered implementations

nodes

Haystack filter node types

parser

Haystack filter parser

path

Haystack filter path

resolver

Haystack path resolvers

Structs

Filter

A Haystack Filter