#core #aws #idl #model #native


Rust native core model for the AWS Smithy IDL

10 releases

new 0.2.4 Apr 7, 2021
0.2.3 Apr 5, 2021
0.2.2 Feb 16, 2021
0.2.1 Oct 28, 2020
0.1.2 Jun 30, 2020

#57 in Web programming

Download history 10/week @ 2020-12-29 16/week @ 2021-01-05 13/week @ 2021-01-12 13/week @ 2021-01-19 15/week @ 2021-01-26 5/week @ 2021-02-02 19/week @ 2021-02-09 69/week @ 2021-02-16 10/week @ 2021-02-23 11/week @ 2021-03-02 13/week @ 2021-03-09 4/week @ 2021-03-16 22/week @ 2021-03-23 16/week @ 2021-03-30 47/week @ 2021-04-06

77 downloads per month
Used in 8 crates (7 directly)

MIT license


Atelier: crate atelier_core

This crate provides a Rust native core model for the AWS Smithy Interface Definition Language.

crates.io docs.rs

This crate is the foundation for the Atelier set of crates, and provides the following components:

  1. The model structures themselves that represents a Smithy model This is the in-memory representation shared by all Atelier crates and tools.
  2. The model builder structures that allow for a fluent and easy construction of a core model.
  3. The prelude model containing the set of shapes defined in the Smithy specification.
  4. Traits for reading/writing models in different representations.
  5. A common error module to be used by all Atelier crates.


The following example demonstrates the builder interface to create a model for a simple service. The service, MessageOfTheDay has a single resource Message. The resource has an identifier for the date, but the read operation does not make the date member required and so will return the message for the current date.

use atelier_core::error::ErrorSource;
use atelier_core::model::builder::values::{ArrayBuilder, ObjectBuilder};
use atelier_core::model::builder::{
    Builder, ListBuilder, MemberBuilder, ModelBuilder, OperationBuilder, ResourceBuilder,
    ServiceBuilder, ShapeTraits, SimpleShapeBuilder, StructureBuilder, TraitBuilder,
use atelier_core::model::{Identifier, Model, ShapeID};

fn make_model() -> Model {
    ModelBuilder::new(Version::V10, "example.motd")
            ServiceBuilder::new("MessageOfTheDay", "2020-06-21")
                .documentation("Provides a Message of the day.")
                .identifier("date", "Date")
                .member("date", "Date")


Runnable Examples

The example weather_builder.rs in the examples directory uses the complete example from the Smithy quick start guide. The examples directory also includes a pair of stand-alone examples, using the semantic model and builder APIs, for the message of the day service shown in the example above.

As usual these can be executed via cargo in the following manner.

$ cargo run --example weather_builder
$ cargo run --example motd_core
$ cargo run --example motd_builder


Version 0.2.3

  • Added initial builder types for constructing Selector models.
  • Renamed ShapeType::All to ShapeType::Any.

Version 0.2.3

  • Added support for constructing Selector models.

Version 0.2.2

  • Refactor: added HasIdentity and HasTraits traits to allow doc writer to be polymorphic.
  • Added: used prelude constants in trait builder.

Version 0.2.1

  • Added MutableModelVisitor trait.

Version 0.2.0

  • Major refactor after agreement on the separation of semantic model with Smithy team.
    • Only included the semantic model elements
    • Reworked trait module
    • Made all shape IDs absolute
  • Made Builder API create and validate shape IDs.
  • Moved UML writer to lib.

Version 0.1.5

  • Added UnwelcomeTerms linter.
  • API changes for ModelReader and ModelWriter;
    • removed representation method
  • Made ActionIssue an std::error::Error.
  • Added ModelVisitor to action module.
  • Added Model::merge method.

Version 0.1.4

  • Completed the NoOrphanedReferences validator.
  • Added CorrectTypeReferences validator.
  • Added NamingConventions linter.
  • Added functions run_linter_actions and run_validation_actions, and removed ValidateAll type.
  • Using Regex for identity parsing.
  • Moved REPRESENTATION to representation() on ModelReader and ModelWriter traits.

Version 0.1.3

  • Made debug and uml Writer implementations features.
  • Added module syntax for all string constants.
  • Added all defined ShapeIDs to the module prelude.
  • Implemented the foundation for actions, also started on validation.
  • Implemented Model::resolve_id according to the Smithy spec.

Version 0.1.2

  • Updated the model and builder APIs to support JSON and Smithy readers:
    • added the HasMembers trait for a more un-typed API,
  • Finished the API documentation.

Version 0.1.1

  • Updated the model and builder APIs to be more consistent:
    • documented method patterns, and ensured they were applied,
    • moved from per-type build methods to use Into<T>,
  • Added the majority of API documentation.

Version 0.1.0

  • First release.
  • Initial types for manipulation of Smithy Models, not including selector expressions.
  • Initial builder types for fluent construction of models.
  • Able to construct the example weather service using the builder API.


  1. Complete the prelude model.
  2. More documentation
  3. More tests


~53K SLoC