RichardGong / Playwithcompiler
A GeekTime course about constructing a compiler.
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Play With Complier
本项目是极客时间的《编译原理之美》课程的示例代码。
课程Web网址:https://time.geekbang.org/column/intro/219
或者下载“极客时间”APP,查找《编译原理之美》课程。
目录内容
lab
课程实验和资料。
- lab/01 :第1讲的资料,包含一个pdf文档,是第一课中提到的自动生成parser的工具。
- lab/craft : 第2-5讲的资料。手工实现的简单的词法分析器、语法分析器、计算器、脚本解释器。
- SimpleLexer.java:一个简单的词法分析器。
- SimpleCalculator.java:一个简单的计算器,提供了基础的语法分析功能。对表达式的解析会有结合性问题。
- SimpleParser.java: 一个更好的语法解析器。在左递归、优先级和结合性方面都没有问题。
- SimpleScript.java:一个简单的脚本解释器。它提供了一个REPL界面,输入命令并执行。
比如,输入: java SimpleScript
或:java SimpleScript -v
-v 参数会让解释器打印AST和求值过程。
- lab/antlrtest : 第6讲的示例代码。
- Hello.g4 一个简单的词法规则文件
- CommonLexer.g4 参考https://github.com/antlr/grammars-v4/blob/master/java/JavaLexer.g4 形成的一个词法文件。
- PlayScript.g4 参考https://github.com/antlr/grammars-v4/blob/master/java/JavaParser.g4 形成的一个语法文件。
- ASTEvaluator.java 实现了visitor模式的一个类,对AST遍历,实现表达式求值。
- PlayScript.java 一个简单的测试程序
- 其他文件:都是由Antlr解析规则文件后生成的
- lab/16-18 : 第16-18讲,算法篇的示例代码
- Regex.java : 正则表达式工具,包括从正则表达式生成NFA,从NFA生成DFA,以及基于NFA和DFA做字符串匹配。
- Lexer.java : 基于正则表达式自动做词法分析。
- GrammarNode.java : 文法。能像EBNF那样表示词法和语法。
- State.java : 有限自动机节点。
- DFAState.java : DFA的节点。
playscript-java
这是一个java版本的脚本语言的参考实现,课程第7讲之后的示例以该项目为核心。
详细介绍,参见playscript-java的说明。
环境配置
注意
随着课程进度,会不断更新资料内容和本文档的内容。
本项目的代码也会处在不断的变化中。
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