face/parser

用于用PHP编写解析器的辅助工具

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详细信息

github.com/face-orm/face-parser

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安装: 63

依赖项: 1

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关注者: 2

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dev-master 2015-12-04 17:31 UTC

Requires

  • php: >=5.5.0

Requires (Dev)

MIT ae9029cbb1399dcb41f7c80ecbf39dc44515e159

parserlexercompiler

This package is auto-updated.

Last update: 2024-09-06 18:57:43 UTC

README

Latest Stable Version Build Status Test Coverage

一个辅助工具，用于使用PHP创建解析器。最初用于解析FQL查询，但也可能用于其他任何用途。

用法

    use Face\Parser\RegexpLexer as Lexer;
    use Face\Parser\TokenNavigation;
    
    $lexer = new Lexer();
    
    $lexer->setTokens([
    
        "function"                  => "T_FUNCTION",
        "class"                     => "T_CLASS",
        "[a-zA-Z_][a-zA-Z0-9_]*"    => "T_IDENTIFIER",
        "\\{"                       => "T_L_BRACKET",
        "\\}"                       => "T_R_BRACKET",
        "\\("                       => "T_L_PARENTHESIS",
        "\\)"                       => "T_R_PARENTHESIS",
        ";"                         => "T_SEMICOLON",
        "\\s+"                      => "T_WHITESPACE"
    
    ]);
    
    $string = 'class foo{
        function bar(){}
    }';
    
    $tokenArray = $lexer->tokenize($string);
    
    $tokens = new TokenNavigation($tokenArray);
    
    // Check if the first token is a "class" keyword or throws an exception
    $tokens->expectToBe("T_CLASS");
    
    $tokens->next();
    $tokens->expectToBe("T_IDENTIFIER");
    
    $className = $tokens->current()->getTokenValue();
    
    // while next token is a function keyword
    while($tokens->hasNext() && $tokens->look(1)->is("T_FUNCTION")){
        // Parse the function body
        someFunctionThatParsesTheFunctionAndJumpsToTheNextToken($tokens);
    }