given the following source code in a file somefile.c
#123 "dummy.c" 1 static int func() { return 0; }
the location information returned by this function would be
File: dummy.c Line: 124 Column: 12
whereas clang_getExpansionLocation would have returned
File: somefile.c Line: 3 Column: 12
filename out if non-NULL, will be set to the filename of the source location. Note that filenames returned will be for "virtual" files, which don't necessarily exist on the machine running clang - e.g. when parsing preprocessed output obtained from a different environment. If a non-NULL value is passed in, remember to dispose of the returned value using \c clang_disposeString() once you've finished with it. For an invalid source location, an empty string is returned.
line out if non-NULL, will be set to the line number of the source location. For an invalid source location, zero is returned.
column out if non-NULL, will be set to the column number of the source location. For an invalid source location, zero is returned.
Retrieve the file, line, column, and offset represented by the given source location, as specified in a # line directive.