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 builder::FilterBuilder;

pub use builder::HasTerm;

pub use builder::IntoFilterPath;

pub use builder::NeedsTerm;

pub use eval::Eval;

pub use filtered::Filtered;

pub use filtered::ListFiltered;

pub use resolver::PathResolver;

Modules

builder

Haystack filter builder

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