[css]后处理器vs预处理器

专有名词

css AST

css 抽象语法树(abstract-syntax-tree) 。An AST is usually the result of the syntax analysis phase of a compiler.

抽象语法树

作用

Operator overloading is yet another case where correct usage and final function are determined based on the context. Java provides an excellent example, where the '+' operator is both numerical addition and concatenation of strings.

参考文献

预处理器处理流程
https://en.wikipedia.org/wiki/Abstract_syntax_tree