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dewey92/brand-impr2.ts

Last active August 9, 2019 08:03
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brand-impr2.ts
// brand.ts
// use symbol, but don't export it!
declare const _brand: unique symbol;
export type Brand<Name, Type> = Type & { [_brand]?: Name }
// degree-module.ts
export type Celcius = Brand<'Celcius', number>;
export type Fahrenheit = Brand<'Fahrenheit', number>;
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