Crate cel 

CEL-Rust

A parser and interpreter for the Common Expression Language (CEL) in Rust.

common explains CEL’s type system: how values, types, operators and functions fit together, and how to add types of your own.

Optional Features

• chrono: Enables support for duration and timestamp types using the chrono crate (and chrono-tz for IANA time zone arguments).
• regex: Enables support for regular expressions.
• json: Enables conversion between CEL values and JSON.
• ext_encoders (default): Enables the extensions::encoders extension library, base64.encode and base64.decode, using the base64 crate.

Re-exports

pub use common::ast::IdedExpr;

pub use context::Context;

pub use functions::FunctionContext;

pub use objects::ResolveResult;

pub use objects::Value;

pub use parser::ParseError;

pub use parser::ParseErrors;

Modules

common

The expression tree, ast, and CEL’s type system: how values, types, operators and functions fit together.

context

extensions

extractors

functions

objects

parser

Macros

add_member_overload

Register a member-function overload on an Env from a typed Rust fn item, generating the arg-downcast and result-wrapping at expansion time.

add_overload

Register a global (non-member) function overload on an Env from a typed Rust fn item, generating the arg-downcast and result-wrapping at expansion time.

impl_conversions

impl_handler

Structs

Duration

A wrapper Duration type which allows conversion to Value::Duration for types using automatic conversion with serde::Serialize.

Env

An environment for the CEL execution.

OverloadError

Details about an operator or function call for which no overload matched.

Program

StructDef

A definition for a custom struct type.

Timestamp

A wrapper Timestamp type which allows conversion to Value::Timestamp for types using automatic conversion with serde::Serialize.

TypeRegistry

The types known to an Env, by name.

Enums

DeclarationError

An error declaring something in an Env or a Context.

ExecutionError

SerializationError

TypeDecl

A type to register with an Env, see Env::add_type.

Traits

StructType

A struct type that expressions can construct, e.g. acme.Account{id: 1}.

Functions

to_value