unit::CheckUnit< BU, TU > Struct Template Reference

helper template CheckUnit More...

#include <Unit.h>

List of all members.

Public Types
typedef BSUtilities::IF< Loki::SuperSubclass< BU, TU >::value, TU, UnitError< true > >::RET	Check
	perform check

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Detailed Description

template<class BU, class TU>
struct unit::CheckUnit< BU, TU >

helper template CheckUnit

check whether test unit TU is a descendant of base unit BU;

Definition at line 71 of file Unit.h.

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Member Typedef Documentation

template<class BU, class TU> typedef BSUtilities::IF<Loki::SuperSubclass<BU, TU>::value, TU, UnitError<true> >::RET unit::CheckUnit< BU, TU >::Check

perform check uses Alexandrescu's template SuperSubclass to detect inheritance at compile time, its value function returns a bool; uses Czarnecki and Eisenecker's template IF to select between two classes, depending on the outcome of SuperSubclass; UnitError<true> is never declared and can not be instantiated, it is selected if BU is not a base class of TU; if the compiler wants to instantiate UnitError<true> it emits an error message; if, on the other hand BU is a base class if TU, the test unit is instantiated ok and can be retrieved from Check. Definition at line 86 of file Unit.h.

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The documentation for this struct was generated from the following file:

• Unit.h

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