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  26. <div class="titlepage"><div><div><h2 class="title" style="clear: both">
  27. <a name="variadic_macro_data.vmd_detail"></a><a class="link" href="vmd_detail.html" title="Functional groups">Functional groups</a>
  28. </h2></div></div></div>
  29. <p>
  30. The particular constructs for which VMD has functionality can be divided into
  31. these categories:
  32. </p>
  33. <div class="orderedlist"><ol class="orderedlist" type="1">
  34. <li class="listitem">
  35. Emptiness
  36. </li>
  37. <li class="listitem">
  38. Identifiers
  39. </li>
  40. <li class="listitem">
  41. Numbers
  42. </li>
  43. <li class="listitem">
  44. Types
  45. </li>
  46. <li class="listitem">
  47. Boost PP data types ( array, list, seq, and tuple )
  48. </li>
  49. <li class="listitem">
  50. Sequences
  51. </li>
  52. <li class="listitem">
  53. Additional helper variadic macros
  54. </li>
  55. </ol></div>
  56. <p>
  57. The first six categories delineate the data types which VMD can parse. The
  58. last category presents additional macros which will prove helpful for a macro
  59. programmer using variadic macros with VMD and Boost PP.
  60. </p>
  61. <p>
  62. A general explanation of each of these categories will follow in the appropriate
  63. place in the documentation.
  64. </p>
  65. <p>
  66. Furthermore VMD macros for working with the above data types which VMD understands
  67. can be divided into 'specific' and 'generic' macros.
  68. </p>
  69. <p>
  70. The specific macros ask whether some input data is a particular data type.
  71. The generic macros work with input data as any data type while allowing the
  72. programmer to separately query the type of data.
  73. </p>
  74. <p>
  75. Both specific and generic macros have their place and the macro programmer
  76. can decide which to use for any given situation.
  77. </p>
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