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Template Arguments

Template arguments in the SAS/C C++ Development System follow these guidelines:

• Template arguments cannot be unnamed types or local types. Local types are declared inside a function.

• Nontype template arguments must be one of the following:
  • integral constant expressions (including enum constants)

  • pointers to objects with external linkage (including static class members) specified as:

    &external_name or &class_name::static_member

  • pointers to functions with external linkage specified as:

    external_name or

    class_name::static_member or

    &external_name or

    &class_name::static_member

  • references to functions or objects with external linkage (including static class members) specified as:

    external_name or

    class_name::static_member

  • member pointer constants for nonstatic data members specified as:

    &class_name::member

The C++ translator performs a limited number of conversions on explicitly specified template arguments in order to match the type of the formal template. The outer level qualifiers on the formal type are ignored for matching purposes. The standard conversions performed on template arguments are

• integral conversions

• reference binding where an object or function name argument of type T converts to a parameter of type T&

• function to pointer conversion

• qualification conversions

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