json解析器中的SyntaxError

SyntaxError in Jison parser

本文关键字：SyntaxError json      更新时间：2023-09-26

我试图使用Jison编写解析器，该解析器将解析javap工具的输出。下面是我的。jison文件的内容:

%lex
%x classfile
%%
"Classfile"             { this.begin("classfile"); }
<classfile>'s+          { /* ignore whitespace */ }
<classfile>[^'n]+       { this.popState(); return 'CLASSFILE'; }
<INITIAL><<EOF>>        { return 'EOF'; }
/lex
%start root
%%
root
  : CLASSFILE EOF { return $1; }
  ;

不幸的是，当我运行"jison javap。，我得到这个错误:

undefined:5
case 0:"Classfile"             { this.begin("classfile"); }
                               ^
SyntaxError: Unexpected token {
    at Function (<anonymous>)
    at Object.buildActions (C:'Users'cdmck_000'AppData'Roaming'npm'node_modules'jison'node_modules'jison-lex'regexp-lexer.js:118:12)
    at Object.RegExpLexer (C:'Users'cdmck_000'AppData'Roaming'npm'node_modules'jison'node_modules'jison-lex'regexp-lexer.js:131:39)
    at Jison_Generator (C:'Users'cdmck_000'AppData'Roaming'npm'node_modules'jison'lib'jison.js:108:22)
    at (anonymous function) (C:'Users'cdmck_000'AppData'Roaming'npm'node_modules'jison'lib'util'typal.js:23:28)
    at new o.constructor (C:'Users'cdmck_000'AppData'Roaming'npm'node_modules'jison'lib'util'typal.js:77:70)
    at new Jison_Generator (C:'Users'cdmck_000'AppData'Roaming'npm'node_modules'jison'lib'jison.js:1578:20)
    at processGrammar (C:'Users'cdmck_000'AppData'Roaming'npm'node_modules'jison'lib'cli.js:87:21)
    at Object.exports.main (C:'Users'cdmck_000'AppData'Roaming'npm'node_modules'jison'lib'cli.js:61:56)
    at Object.<anonymous> (C:'Users'cdmck_000'AppData'Roaming'npm'node_modules'jison'lib'cli.js:105:13)

我已经尝试用'w+代替"Classfile"，但它只是给了我一个错误在'w+的'。

我将行尾从Windows格式转换为UNIX格式，问题就解决了。

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