given the following source code in a file somefile.c
\code #123 "dummy.c" 1
static int func(void) { return 0; } \endcode
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
\param location the location within a source file that will be decomposed into its parts.
\param 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.
\param line out if non-NULL, will be set to the line number of the source location. For an invalid source location, zero is returned.
\param column out if non-NULL, will be set to the column number of the source location. For an invalid source location, zero is returned.
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\brief Retrieve the file, line, column, and offset represented by the given source location, as specified in a # line directive.