[Dune] GMPField use

[Simon Praetorius]

Hi Kirill,

GMPField can essentially be used like any other floating-point type. 
But, not all utility functions, like `std::numeric_limits<GMPField>`, 
are completely available. Also some mathematical functions might not be 
implemented for GMPField. It is mainly used in some tests for accuracy 
of the implementation of some functionality.

I have (long time ago) implemented a replacement of GMP with mpfr that 
has a slightly more complete set of operations and utilities and is 
still maintained. I used it (to some extend) as field type in a 
finite-element assembling in combination with iterative solvers.

What do you mean be `str()` function? What should this return? Is it 
supposed to be a member function? or free function? Why do you expect a 
floating-point type to have such a function?

Best regards,
Simon

Am 08.06.21 um 09:39 schrieb Kirill Volyanskiy:
> Hello,
> Is there any guide on using the GMPField? I've tried to use it but got 
> many errors in some modules like absence of str() function etc.
>
> Best regards,
> Kirill
>
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-- 
Dr. Simon Praetorius
Technische Universität Dresden
Institute of Scientific Computing
phone: +49 351 463-34432
mail: simon.praetorius at tu-dresden.de
web: https://tu-dresden.de/mn/math/wir/das-institut/beschaeftigte/simon-praetorius

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