目录
编译原理实践................................................................................................................1
引言................................................................................................................................3
一、PL/0 语言 ...............................................................................................................3
1.1 PL/0 描述 .........................................................................................................3
1.2 PL/0 语言文法的扩充 BNF 表示 ...................................................................3
1.3 PL/0 的语法图 .................................................................................................4
1.4 PL/0 编译系统结构 .........................................................................................6
二、系统分析................................................................................................................7
2.1 PL/0 的词法分析 .........................................................................................7
2.2 PL/0 的符号表管理 .....................................................................................8
2.3 PL/0 的语法分析 .........................................................................................8
2.4 生成目标代码 ..............................................................................................9
2.4.1 P-code 含义...........................................................................................9
2.4.2 地址返填技术.....................................................................................10
2.5 错误处理........................................................................................................11
2.5.1 错误处理的原则.................................................................................11
2.5.2 错误校正.............................................................................................11
2.5.3 错误信息.............................................................................................11
三、系统架构..............................................................................................................13
3.1 lexer2.py.........................................................................................................13
3.2 paser.py ..........................................................................................................13
3.3 interpreter.py ..................................................................................................15
四、界面操作..............................................................................................................15
五、测试代码说明......................................................................................................17
六、实验感想..............................................................................................................17
七、参考资料..............................................................................................................18
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