Re: [Boost-users] Problem of using Boost::regex

I want to make a program to grep all symbols in header file,like:

#define CMD_BASE 0x10000000 #define CMD_GETFile (CMD_BASE + 0X00000001) /* Get a file from srv*/

A singl symbole definition line will be extract to three parts: 1. symbol itself 2. the value of a symbol, it's a signed 32-bit value 3. comments about the symbol

I use the following pattern: std::string ptn = "\\s*#define\\s+([^\\s]+)\\s+([^/]*)([^\r\n]*)";

I hope this pattern could do what I want, but when I use grep to do the parsing, I got from above two lines:

And so you should: the newline is a valid space character, if you don't want to match newlines then use [[:blank:]]+ instead. John.