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<div class="title">W:/Work/Software/Libraries/utl/include/utl/concepts/defines.h</div>  </div>
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<p>utl typename constraints wrapper</p><div class="fragment"><div class="line"><span class="keyword">template</span> &lt;utlConstrainType(SomeConcept) T&gt; <span class="keyword">struct </span>lala { };</div><div class="line"><span class="comment">// will expand to something like:</span></div><div class="line"><span class="comment">// template &lt;SomeConcept T&gt; struct lala { };</span></div><div class="line"><span class="comment">// or</span></div><div class="line"><span class="comment">// template &lt;typename T&gt; struct lala { };</span></div></div><!-- fragment --><div class="fragment"><div class="line"></div><div class="line"><span class="preprocessor">#ifndef __utl_concepts_defines_h__</span></div><div class="line"><span class="preprocessor">#define __utl_concepts_defines_h__</span></div><div class="line"></div><div class="line"></div><div class="line"><span class="preprocessor">#if CXX_CONCEPTS</span></div><div class="line"><span class="preprocessor">   #define utlConstrainType(_Concept_)   _Concept_</span></div><div class="line"><span class="preprocessor">#else</span></div><div class="line"><span class="preprocessor">   #define utlConstrainType(_Concept_)   typename</span></div><div class="line"><span class="preprocessor">#endif</span></div><div class="line"></div><div class="line"><span class="preprocessor">#if CXX_CONCEPTS</span></div><div class="line"><span class="preprocessor"> #if __cpp_concepts &lt;= 201507L</span></div><div class="line"><span class="preprocessor">   #define _utlConcept   concept bool</span></div><div class="line"><span class="preprocessor"> #else</span></div><div class="line"><span class="preprocessor">   #define _utlConcept   concept</span></div><div class="line"><span class="preprocessor"> #endif</span></div><div class="line"><span class="preprocessor">#else</span></div><div class="line"><span class="preprocessor">  #define _utlConcept    constexpr bool</span></div><div class="line"><span class="preprocessor">#endif</span></div><div class="line"></div><div class="line"><span class="preprocessor">#ifndef CXX_LIB_INVOKE</span></div><div class="line"><span class="preprocessor"> #ifdef __cpp_lib_invoke</span></div><div class="line"><span class="preprocessor">  #define CXX_LIB_INVOKE __cpp_lib_invoke</span></div><div class="line"><span class="preprocessor"> #else</span></div><div class="line"><span class="preprocessor">   #define CXX_LIB_INVOKE 0</span></div><div class="line"><span class="preprocessor"> #endif</span></div><div class="line"><span class="preprocessor">#endif</span></div><div class="line"></div><div class="line"></div><div class="line"><span class="preprocessor">#endif </span><span class="comment">/* __utl_concepts_defines_h__ */</span><span class="preprocessor"></span></div></div><!-- fragment --> </div><!-- contents -->
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