被GCC和Clang的解析器真的手写的吗？ [英] Are GCC and Clang parsers really handwritten?

问题描述

一个都叫礼Bendersky 在其博客中表示GCC和Clang的解析器是手写写的，不与YACC的帮助下完成或任何其他编译器编译器。此外，他似乎是说，他们是递归下降解析器。

A guy named Eli Bendersky wrote in his blog that GCC and Clang parser are handwritten, that is not done with the help of yacc or any other compiler-compiler. Furthermore he seems to say that they are recursive-descent parsers.

莫非有人在这里证实，一些主流的编译器框架仍然采取这种手写的解析器？

Could someone here confirm that some mainstream compiler frameworks still resort to such handwritten parsers?

更新：关于这一主题这里有趣的博客

推荐答案

是：

• 在GCC时使用的YACC（野牛）分析器一次，但它与在3.x系列的一些点手写递归下降解析器代替：看的http://gcc.gnu.org/wiki/New_C_Parser 获取链接到相关的补丁提交。

• GCC used a yacc (bison) parser once upon a time, but it was replaced with a hand-written recursive descent parser at some point in the 3.x series: see http://gcc.gnu.org/wiki/New_C_Parser for links to relevant patch submissions.

锵还采用了手写的递归下降解析器：请参见对于C一个统一的解析器，目标C，C ++和Objective C ++附近的 http://clang.llvm.org/features.html 。

Clang also uses a hand-written recursive descent parser: see the section "A single unified parser for C, Objective C, C++ and Objective C++" near the end of http://clang.llvm.org/features.html .

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