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@rotcare/codegen

v0.1.10

Published

`codegen()` 类似 C/C++ 的宏,会在编译期被执行,并替换源代码。

Downloads

23

Readme

TypeScript 编译期代码生成

codegen() 类似 C/C++ 的宏,会在编译期被执行,并替换源代码。

import { codegen, Model } from '@rotcare/codegen';
import { Product } from './Product';
import { generateForm } from 'some-generator';

const someVar = codegen((product: Model<Product>) => {
    return generateForm(product);
})

在编译的时候,codegen 中的回调会被执行。假设 generateForm 返回了 "Hello" 字符串。那么这里就变成了

const someVar = "Hello"; // 由 generateForm 生成的代码

codegen 可以依赖多个 Model,也可以扫描项目中的所有 Model

const someVar = codegen((product: Model<Product>, order: Model<Order>) => {
    ...
})

const someVar = codegen((...allModels: Model[]) => {
    ...
})

这里引用的 Model 对象,由编译期解析 Class 的定义得出,比如

// in Some/Path/Order.ts
export class Order {
    public id: string;
    public totoal: number;
}

那么在 order: Model<Order> 里就可以拿到 idtotal 这两个 properties。也就是编译期的类定义反射。

编译需要选择对应的编译工具链

API

yarn add @rotcare/codegen