FIDL

FIDL (or “Fuchsia Interface Definition Language”) is the IPC system for Fuchsia.

Start here

The tutorial presents a simple “Hello, world” client and server, showing the FIDL language definitions and continuing with sections specific to each supported target language (e.g., C++, Go).

Read the Introduction section to get a brief overview of what FIDL is, including some of its design goals, requirements, and workflow.

Language support

The FIDL code generator creates code in a multitude of target languages. The following table gives you a reference to the details of the language implementaion, as well as pointers to the code generated from the tutorial's “Hello, world” client and server examples.

Language	Examples
C	server
Low-Level C++	client, server
High-Level C++	client, server
Dart	client, server
Go	client, server
Rust	client, server

Contributing

Please read the CONTRIBUTING chapter for more information.

References

ABI and Source Compatibility Guide — how to evolve FIDL APIs
API Readability Rubric — general advice and best practices
Attributes — describes the available FIDL attributes
Bindings — requirements for FIDL language bindings
Compiler — describes the organization of the compiler
Linter — describes how to check API readability with the FIDL linter
Editors — discusses support for FIDL in IDEs and stand-alone editors
FIDL Tuning Proposals — accepted and rejected changes for FIDL
Grammar — the FIDL grammar
Host — summary of the parts of FIDL that are allowed on host
JSON IR — a tour of the JSON Intermediate Representation (JSON IR) generator
Language — defines the syntax of the FIDL language
library zx — the Zircon system library
Wire Format — details the byte-by-byte organization of data