What is the purpose of 'warning: no newline at end of file'?

[Eljay Love-Jensen]

Hi Neo,

>#include "Foo.h"

>There is already a newline after it. What does the Standard say?

The standard says that if you do not put in a newline at the end of Foo.h, the behavior is undefined.

The preprocessor directive #include "Foo.h" *includes* the newline at end-of-line.

No preprocessor that I know of puts in EXTRA newlines when it expands the preprocessor directives.  Putting in an EXTRA newline when the included file lacks one at the end-of-file is compiler specific (enhancement to standard) behavior.

Sincerely,
--Eljay