lex

Is there an implementation of Lex and Yacc in PHP? If not, can anyone suggest a lexical analyser and parser generator (ie, anything like Lex and Yacc) that will create PHP code. I'm not too worried about the performance of the resulting parser. I am sick of using regex to parse things that really shouldn't be parsed with regex... There's JLexPHP: https://github.com/wez/JLexPHP/blob/master/jlex.php I've not used it, but there's this: http://pear.php.net/package/PHP_ParserGenerator , which creates a PHP Parser from a Lemon grammar. The project seems to be inactive though. I also found this

I want to parse a string which I give to the parser in the main function of yacc . I know that this could be done by using yy_scan_string but I don't know how to use it. I searched the web and the man pages but it is still not clear to me. Please help me. In case anyone needs the sample for a re-entrant lexer: int main(void) { yyscan_t scanner; YY_BUFFER_STATE buf; yylex_init(&scanner); buf = yy_scan_string("replace me with the string youd like to scan", scanner); yylex(scanner); yy_delete_buffer(buf, scanner); yylex_destroy(scanner); return 0; } This works for me. I have this code in the

I want my yylex() to parse a string rather than a file or standard input. How can I do it with the Lex and Yacc provided with Solaris? Redefine YY_INPUT. Here's a working example, compile and run with the commands yacc -d parser.y lex lexer.l gcc -o myparser *.c Input is read from globalInputText. You can modify this example so that global input text is whatever string you want or from any input source you want. parser.y: %{ #include <stdio.h> extern void yyerror(char* s); extern int yylex(); extern int readInputForLexer(char* buffer,int *numBytesRead,int maxBytesToRead); %} %token FUNCTION

1.使用./build编译boa-0.94.13时出现make:yacc:command not be found 解决方法：apt-get install -y byacc 2.出现make:lex:command not be found 解决方法：apt-get install flex 来源： https://www.cnblogs.com/moaiwa/p/8188569.html

I want to create a read-eval-print loop using flex/bison parser. Trouble is, the flex generated lexer wants input of type FILE* and i would like it to be char*. Is there anyway to do this? One suggestion has been to create a pipe, feed it the string and open the file descriptor and send to the lexer. This is fairly simple but it feels convoluted and not very platform independent. Is there a better way? The following routines are available for setting up input buffers for scanning in-memory strings instead of files (as yy_create_buffer does): YY_BUFFER_STATE yy_scan_string(const char *str) :