@protobufjs/codegen

What is @protobufjs/codegen?

@protobufjs/codegen is a utility for generating JavaScript code dynamically. It is particularly useful in the context of Protocol Buffers, where it can be used to generate efficient serialization and deserialization code.

What are @protobufjs/codegen's main functionalities?

Dynamic Code Generation

This feature allows you to dynamically generate JavaScript functions. In this example, a function `encode` is generated which calls a method `m.encode` on a message and returns the result.

const codegen = require('@protobufjs/codegen');
const gen = codegen('m', 'exports')
  ('function encode(message) {')
  ('  return m.encode(message).finish();')
  ('}');
console.log(gen.toString());

Function Compilation

This feature allows you to compile the generated code into a real JavaScript function. In this example, the `encode` function is compiled and can be used directly.

const codegen = require('@protobufjs/codegen');
const gen = codegen('m', 'exports')
  ('function encode(message) {')
  ('  return m.encode(message).finish();')
  ('}');
const encode = gen(m, {});
console.log(encode.toString());

Other packages similar to @protobufjs/codegen

protobufjs

protobufjs is a comprehensive library for working with Protocol Buffers in JavaScript. It includes functionality for parsing .proto files, encoding and decoding messages, and more. While @protobufjs/codegen focuses on dynamic code generation, protobufjs provides a full suite of tools for working with Protocol Buffers.

google-protobuf

google-protobuf is the official Protocol Buffers library for JavaScript provided by Google. It offers similar functionalities for encoding and decoding Protocol Buffers messages but does not focus on dynamic code generation like @protobufjs/codegen.

typescript-json-schema

typescript-json-schema is a tool for generating JSON schemas from TypeScript types. While it is not directly related to Protocol Buffers, it shares the concept of generating code (in this case, schemas) from a defined structure. It does not offer dynamic code generation like @protobufjs/codegen.

README

@protobufjs/codegen

A closure for generating functions programmatically.

API

• codegen(...params: string): function(format: string, ...args: string): self
  Begins generating a function programmatically.

• codegen#str([name: string]): string
  Stringifies the so far generated function source.

• codegen#eof([name?: string], [scope: Object]): function
  Ends generation and builds the function whilst applying a scope.

License: Apache License, Version 2.0