# 1.2 Golang 编译器

Golang 在[1.5](https://golang.org/doc/go1.5)时实现了自举，即 Go 语言的整个编译器（Compiler）及运行环境（Runtime）都是用 Go 语言写成的，包括其词法分析器、语法分析器都是完整的 Go 语言程序。这给想要深入学习 Go 语言的用户提供了非常友好的支持，对于 Go 语言的任何特性，从语法规则到类型系统，我们都可以深入到编译器中去寻找实现原理，甚至可以自己动手给语言增加新的功能，例如箭头函数、内置函数等，即使无法在生产环境使用，这种实践也是非常有趣的。


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