until
Truncates a line read by the readln command.
Syntax
readln until "regexp" variable
Comments
The current line in the data file is stored in a buffer. The buffer is searched for regexp. If it is found, the line from that point on is deleted from the buffer. The remaining contents of the buffer are then copied to the string variable.
Example
readln until "//" longname // read a request name, ignore a C++ style comment