The Dragon Book is too complicated. So ignore it as a starting point. It is good and makes you think a lot once you already have a starting point, but for starters, perhaps you should simply try to write an math/logical expression evaluator using RD, LL or LR parsing techniques with everything (lexing/parsing) written by hand in perhaps C/Java. This is interesting in itself and gives you an idea of the problems involved in a compiler. Then you can jump in to your own DSL using some scripting language (since processing text is usually easier in these) and like someone said, generate code in either the scripting language itself or C. You should probably use flex/bison/antlr etc to do the lexing/parsing if you are going to do it in c/java.

如果你想使用功能强大的高级工具，而不是自己构建一切，那么阅读本课程的项目和阅读材料是一个很好的选择。这是一门语言课程，由Java解析器引擎ANTLR的作者编写。你可以从Pragmatic Programmers网站上获得这门课程的PDF版本。

The course goes over the standard compiler compiler stuff that you'd see elsewhere: parsing, types and type checking, polymorphism, symbol tables, and code generation. Pretty much the only thing that isn't covered is optimizations. The final project is a program that compiles a subset of C. Because you use tools like ANTLR and LLVM, it's feasible to write the entire compiler in a single day (I have an existence proof of this, though I do mean ~24 hours). It's heavy on practical engineering using modern tools, a bit lighter on theory.

顺便说一下，LLVM非常棒。在许多情况下，你可能会编译到汇编，你最好编译到LLVM的中间表示。它是更高级别的、跨平台的，LLVM非常擅长从中生成优化的程序集。

你可能想看看Lex/Yacc(或Flex/Bison，随便你怎么称呼它们)。Flex是一个词法分析器，它将解析和识别语言的语义组件(“标记”)，而Bison将用于定义解析每个标记时发生的情况。这可以是，但绝对不限于，打印出C代码，供编译器编译成C，或者动态运行指令。

这个常见问题应该对你有帮助，这个教程看起来很有用。

我也喜欢Crenshaw的教程，因为它非常清楚地说明了编译器只是另一个程序，它读取一些输入并写出一些输出。

阅读它。

如果您愿意，可以使用它，但随后查看另一篇关于如何编写更大、更完整的编译器的参考文献。

阅读《关于信任的信任》，了解一下在这个领域可以做的不明显的事情。

The Dragon Book is too complicated. So ignore it as a starting point. It is good and makes you think a lot once you already have a starting point, but for starters, perhaps you should simply try to write an math/logical expression evaluator using RD, LL or LR parsing techniques with everything (lexing/parsing) written by hand in perhaps C/Java. This is interesting in itself and gives you an idea of the problems involved in a compiler. Then you can jump in to your own DSL using some scripting language (since processing text is usually easier in these) and like someone said, generate code in either the scripting language itself or C. You should probably use flex/bison/antlr etc to do the lexing/parsing if you are going to do it in c/java.

你应该看看Darius Bacon的“ichbins”，这是一个针对小Lisp方言的编译器，目标是C，只有6页多的代码。与大多数玩具编译器相比，它的优势在于该语言足够完整，可以用它来编写编译器。(tarball还包括一个解释器来引导这个东西。)

在我的Ur-Scheme网页上有更多关于学习编写编译器的有用内容。