Introduction

BlueScript is a scripting language for programming a microcontroller. It borrows its syntax from TypeScript and hence it is regarded as a small subset of TypeScript. But BlueScript also adopts several unique semantic differences from TypeScript.

BlueScript is a subset of TypeScript because, for example, it (currently) does not support exceptions, promises, async/await, or certain built-in objects. On the other hand, unlike TypeScript, BlueScript supports integer and float primitive types, and a BlueScript program is executed relying on static type information. When a variable is statically typed as integer, it always holds a native 32bit integer during runtime as the C/C++ language does. It never holds another type of value, and thus no runtime type check is necessary. Furthermore, BlueScript supports simple gradual typing.