[Dune] [#1094] Compiling Generic Reference Elements Requires too much Memory (Attachment added)

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The following task has a new comment added:

FS#1094 - Compiling Generic Reference Elements Requires too much Memory
User who did this - Markus Blatt (mblatt)

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The attached patch (which basically substitutes all static const ints by enums) more than halfens the compile time for dim=4.

Unfortunately the memory requirements are not reduced.

@Oliver: Why must this be a bug in gcc? Probably there are many recursive TMPs where big traits classes get instantiated. What do the implementors think?

Maybe instead of having one big traits class with all the traits (like everywhere in DUNE), we should try to us one traits class for each trait. Thus only the stuff that is really needed gets instantiated.

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