Crate jetro 

Jetro — transform, query, and compare JSON.

use jetro::Jetro;
use serde_json::json;

let j = Jetro::new(json!({
    "store": {
        "books": [
            {"title": "Dune",        "price": 12.99},
            {"title": "Foundation",  "price":  9.99}
        ]
    }
}));

let count = j.collect("$.store.books.len()").unwrap();
assert_eq!(count, json!(2));

Modules

ast

Abstract syntax tree for Jetro v2 expressions.

eval

Tree-walking evaluator — reference semantics for Jetro v2.

parser

PEG parser for Jetro v2 source text.

prelude

Convenience re-exports.

vm

High-performance bytecode VM for v2 Jetro expressions.

Structs

Compiler

Engine

Shared, thread-safe query engine.

EvalError

Expr

A parse-checked Jetro expression with a phantom output type.

Graph

A collection of named JSON documents that can be queried together via the v2 VM.

Jetro

Primary entry point for evaluating Jetro expressions.

MethodRegistry

ParseError

Program

A compiled, immutable v2 program. Cheap to clone (Arc internals).

VM

Enums

Error

Engine-side error type. Either a parse failure or an evaluation failure.

Traits

JetroSchema

Trait implemented by #[derive(JetroSchema)] — pairs a type with a fixed set of named expressions.

Method

A custom method that can be registered with MethodRegistry.

Functions

query

Evaluate a Jetro expression against a JSON value.

query_with

Evaluate a Jetro expression with a custom method registry.

Type Aliases

Result