Jison文本转换

index.jison

%lex
%%

/* 词法分析 */
"$$"  return 'DOLLAR'
"$"   return 'DEFINE'
"("   return '('
")"   return ')'
"{"   return '{'
"}"   return '}'
":"   return ':'
","   return ','
";"   return ';'

(\r\n|\n|\r)  return 'EOL'
[ \t\v\b\f]+  return 'SPACES'
[_a-zA-Z0-9]+ return 'KEYWORDS'

[^{]          return '^{'
[^$\r\n]+     return 'WORDS'

/lex

/* 语法定义 */
%start document

%%

/* 语法分析 */
document:
  statements {
    console.log($$);
  }
  ;

statements:
    statement {
    $$ = $1;
  }
  | statements statement {
    $$ = $1 + $2;
  }
  ;

statement:
    function
  | DOLLAR {
      $$ = "$";
  }
  | '(' | ')'
  | '{' | '}' | '^{'
  | ':' | ';' | ',' | EOL
  | KEYWORDS | WORDS {
      $$ = yytext;
  }
  ;

function:
  /* 替换标记1 */
    DEFINE KEYWORDS ';' {
    if(funs.has($2)) {
      $$ = funs.get($2)();
    } else {
      $$ = "----Undefined function " + $2 + "!----";
    }
  }
  /* 替换标记2 */
  | DEFINE KEYWORDS '(' ')' {
    // fun = $2
    // arg = $4
    if(funs.has($2)) {
      $$ = funs.get($2)();
    } else {
      $$ = "----Undefined function " + $2 + "!----";
    }
  }
  /* 行内标记 */
  | DEFINE KEYWORDS '(' parameter ')' '^{' {
    // fun = $2
    // arg = $4
    // more = $6
    if(funs.has($2)) {
      $$ = funs.get($2)($4) + $6;
    } else {
      $$ = $6 + "----Undefined function " + $2 + "!----";
    }
  }
  /* 块标记 */
  | DEFINE KEYWORDS '(' parameter ')' '{' content '}' {
    // fun = $2
    // arg = $4
    // content = $7
    if(funs.has($2)) {
      $$ = funs.get($2)($4, $7);
    } else {
      $$ = "----Undefined function " + $2 + "!----";
    }
  }
  ;

parameter:
  KEYWORDS {
      $$ = yytext;
  }
  ;

content:
    text {
      $$ = $1;
  }
  | content text {
      $$ = $1 + $2;
  }
  ;

text:
    '^{'
  | KEYWORDS
  | WORDS
  | SPACES
  | EOL {
      $$ = yytext;
  }
  ;

input.txt

--------------
$$
(){}:;
_abc
--------------
123$name()456
123$name;456

123$name2()456
123$name2;456
--------------
***$meta(abc)***
--------------
$head(1233){
    内
    容
}
--------------

package.json

{
    "name": "hello_jison",
    "scripts": {
        "build_text": "jison src/text/index.jison -o dist/text.js",
        "dev_text": "node dist/text.js src/text/input.txt"
    }
}