#ifdef nested
#expand 15. This should appear. This is should be line 2 and is line __LINE__.
#elifdef pathtest
This should not appear (path test was relative to wrong path)
#elifndef nested
 1. This should appear. This is a test file for the preprocessor.
 2. This should appear.
#define test 0
 3. This should appear.
#expand  4. This should appear. This should be line 10 and is line __LINE__.
 5. This should appear. 
#if test
This should not appear.
#else
 6. This should appear.
#endif
 7. This should appear.
 8. This should appear.
#ifdef test
 9. This should appear.
#ifndef test
This should not appear.
#ifdef test
This should not appear.
#else
This should not appear.
#endif
#else
10. This should appear.
#ifdef test
#expand 11. This should appear. 'test' is defined with value __test__ (should be 0).
#else
This should not appear.
#endif
#endif
#else
This should not appear.
#else
12. This should appear.
#endif
13. This should appear.
#ifdef HOME
#expand 14. This should appear. Your home directory is __HOME__.
#else
14. This should appear. You have not defined the HOME variable (e.g. by using -E).
#endif
# now we include a file:
#define nested
#include ../preprocessor/test.txt
#if 0
This should not appear.
#undef test
#endif
#if !test
16. This should appear.
#else
This should not appear.
#endif
#if 1
17. This should appear.
#endif
#define foo
#undef bar
#ifdef foo
18. This should appear.
# (included if foo is defined)
#else
This should not appear.
# (included if foo is not defined)
#elifndef bar
19. This should appear.
# (included if foo is defined and bar is not defined)
#else
This should not appear.
# (included if either foo is defined or bar is not defined)
#endif
#undef foo
#ifdef foo
This should not appear.
# (included if foo is defined)
#else
20. This should appear.
# (included if foo is not defined)
#elifndef bar
This should not appear.
# (included if foo is defined and bar is not defined)
#else
21. This should appear.
# (included if either foo is defined or bar is not defined)
#endif
22. This should appear.
# above line is redundant.
23. This should appear. +-+---+-----+
24. This should appear. | |   |     |
25. This should appear. +-+---+-----+
#filter spaces
26. This should appear. +-+-+-+
27. This should appear. | |   |     |
28. This should appear. +-+-+-+
29. This should appear.
# above line is redundant.
#filter slashslash
30. This should appear. +-+-+-+        // This should not appear
31. This should appear. | |   |     |  // This should not appear
32. This should appear. +-+-+-+        // This should not appear // This should not appear either
#unfilter spaces
33. This should appear. +-+---+-----+  // This should not appear // This should not appear either
34. This should appear. | |   |     |  // This should not appear // This should not appear either
35. This should appear. +-+---+-----+  // This should not appear
#unfilter spaces slashslash
36. This should appear. // This should appear.
#include test/test.txt
#filter substitution
#ifdef HOME
40. This should appear. Your home directory is @HOME@.
#else
40. This should appear. You have not defined the HOME variable (e.g. by using -E).
#endif
#define __FAILED__ appear
41. This should @__FAILED__@.
#filter attemptSubstitution
# next line would cause a fatal error if attemptSubstition wasn't
# enabled but substitution was. But since filters run alphabetically,
# it should be ok.
42. This should appear. @__BLANK__@
#unfilter attemptSubstitution
43. This should appear. End.
#else
# this would be included at the same time as line 15.
# this is tested above near lines 18-21
#endif