ESyS-Particle

where is the class of TmplParticle defined?

Asked by Kan

hi,

I see a lot of code like:
template <typename TmplParticle> .....
or
template <class TmplParticle> ....

but I did not find where is the class class TmplParticle defined,
can you tell me in which file and what is the class defined .

thanks.

ken

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SteffenAbe (s-abe) said : 		#1

TmplParticle is just a template parameter, i.e. a placeholder (for details on C++ templates see for example B. Stroustrup, "The C++ Programming Language" 3rd ed. p. 327ff). In short, the is no such thing as a "TmplParticle" - its replaced by a real class name when the template is instantiated.
For example the class to store dynamically created interactions is defined as template<typename P,typename I> class ParallelInteractionStorage_ED where P and I are the template parameters (see file pis/pi_storage_ed.h). Specifically I is the particular type of Interaction which is stored. In the TSubLattice class (see function TSubLattice<T>::doAddPIG(...) in file Parallel/SubLattice.hpp) a number of ParallelInteractionStorage_ED instances with different template parameters are created, i.e. the call " new_pis=new ParallelInteractionStorage_ED<T,CFrictionInteraction>(m_ppa,figp)" creates an object of type ParallelInteractionStorage_ED where the parameter "I" in the declaration is replaced by "CFrictionInteraction" and so on.

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