Name
#line directive — Changes the line number in error messages
Synopsis
#linedigits#linedigitsstring
The #line directive changes
the compiler’s notion of the current filename and line number. The
first form changes the line number (as expressed by the _ _LINE_ _ directive and used in error
messages) to digits. The second form
changes the line number to digits and the
filename to the contents of string. The new
file name is used as the value of the _
_FILE_ _ macro.
The #line directive is
typically used by programs that generate C++ as output from some other
input. The directive records the original filename and line number
that produced the C++ code. Error messages and debuggers can point to
the original file instead of to the intermediate C++ source
file.