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:books: 《Go语言定制指南》(原名:Go语法树入门/开源免费图书/Go语言进阶/掌握抽象语法树/Go语言AST)

Home Page: https://chai2010.cn/go-ast-book

Makefile 0.30% Go 85.94% Yacc 0.47% Lex 0.24% C 3.19% ANTLR 0.14% LLVM 0.11% CWeb 0.08% JavaScript 2.16% CSS 0.55% Handlebars 6.81%
go golang ast book yacc goyacc bison flex lex llvm

go-ast-book's Introduction

《Go语言定制指南》(原名:Go语法树入门)


Go语法树是Go语言源文件的另一种语义等价的表现形式。而Go语言自带的go fmtgo doc等命令都是在Go语法树的基础之上分析工具。因此将Go语言程序作为输入数据,让我们语法树这个维度重新审视Go语言程序,我们将得到创建Go语言本身的技术。Go语法树由标准库的go/ast包定义,它是在go/token包定义的词法基础之上抽象的语法树结构。本书简单介绍语法树相关包的使用。如果想从头实现一个玩具Go语言可以参考《从头实现µGo语言》

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MdBook 构建

增加了基于 Github 的 留言功能mermaid 绘图功能,需要安装以下工具:

然后执行 mdbook serve 本地打开服务,或者 mdbook build 构建。

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go-ast-book's Issues

章节1.3 FileSet和File的描述让人感到困惑

每个FileSet表示一个文件集合,底层抽象为一个一维数组,... FileSet中的每个File元素对应底层数组的一个区间,...

这句话我看到时,将“FileSet的files字段”和“这个抽象的一维数组” 划上了 等号。因为该字段正好是一个一维数组,且每个元素就是个File结构体指针。在这个前提下,本章节后面的内容一度让我非常困惑,直到最后,我才意识到,这个“一维数组”是不存在的。感觉这里的表述也许可以改进一些。

在第一章1.3节关于FileSet和File的描述的疑问

原文为

在每个File内部可以通过offset定位下标索引,通过offset+File.base可以将File内部的offset转换为Pos位置。因为Pos是FileSet的全局偏移量,反之也可以通过Pos查询对应的File,以及对应File内部的offset。

图画为:
image

是不是应该为:

在每个File内部可以通过offset定位下标索引,通过File.offset+FileSet.base可以将File内部的offset转换为Pos位置。因为Pos是FileSet的全局偏移量,反之也可以通过Pos查询对应的File,以及对应File内部的offset。

如果是我理解错误,请大佬指正。

求大佬解惑!
@chai2010

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