# PA2：语义分析

- [阶段任务](/decaf-book/scala-kuang-jia-fen-jie-duan-zhi-dao/pa2-yu-yi-fen-xi/index.md)
- [类型、符号和作用域](/decaf-book/scala-kuang-jia-fen-jie-duan-zhi-dao/pa2-yu-yi-fen-xi/datatype.md)
- [符号表构建](/decaf-book/scala-kuang-jia-fen-jie-duan-zhi-dao/pa2-yu-yi-fen-xi/table.md)
- [类型检查](/decaf-book/scala-kuang-jia-fen-jie-duan-zhi-dao/pa2-yu-yi-fen-xi/typecheck.md)