现在,我正在研究下面的代码 http://www.quut.com/c/ANSI-C-grammar-l-2011.html
{L}{A}* { return check_type(); }
{HP}{H}+{IS}? { return I_CONSTANT; }
{NZ}{D}*{IS}? { return I_CONSTANT; }
"0"{O}*{IS}? { return I_CONSTANT; }
{CP}?"'"([^'\\\n]|{ES})+"'" { return I_CONSTANT; }
{D}+{E}{FS}? { return F_CONSTANT; }
{D}*"."{D}+{E}?{FS}? { return F_CONSTANT; }
{D}+"."{E}?{FS}? { return F_CONSTANT; }
{HP}{H}+{P}{FS}? { return F_CONSTANT; }
{HP}{H}*"."{H}+{P}{FS}? { return F_CONSTANT; }
{HP}{H}+"."{P}{FS}? { return F_CONSTANT; }
({SP}?\"([^"\\\n]|{ES})*\"{WS}*)+ { return STRING_LITERAL; }
我想问一下这部分代码的含义是什么?它与Yacc有什么关系? Yacc代码为http://www.quut.com/c/ANSI-C-grammar-y-2011.html