/trunk/Examples/d/constants/example.i

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  1. /* File : example.i */
    2. 

  2. %module example
    3. 

  3. 

  4. /* Force the generated D code to use the C constant values rather than
    5. 

  5.    retrieving them at runtime. You can also try disabling the feature and
    6. 

  6.    compare the generated code. */
    7. 

  7. %dmanifestconst;
    8. 

  8. 

  9. 

  10. /* A few preprocessor macros */
    11. 

  11. 

  12. #define    ICONST      42
    13. 

  13. #define    FCONST      2.1828
    14. 

  14. #define    CCONST      'x'
    15. 

  15. #define    CCONST2     '\n'
    16. 

  16. #define    SCONST      "Hello World"
    17. 

  17. #define    SCONST2     "\"Hello World\""
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  18. 

  19. /* This should work just fine */
    20. 

  20. #define    EXPR        ICONST + 3*(FCONST)
    21. 

  21. 

  22. /* This shouldn't do anything */
    23. 

  23. #define    EXTERN      extern
    24. 

  24. 

  25. /* Neither should this (BAR isn't defined) */
    26. 

  26. #define    FOO         (ICONST + BAR)
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  27. 

  28. 

  29. /* The following directives also produce constants */
    30. 

  30. 

  31. %constant int iconst = 37;
    32. 

  32. %constant double fconst = 3.14;
    33.