add CEED_UNUSED to avoid warnings for hipblas error checking

move HIP-shared basis init routines to header

add launch bounds information for basis kernels

Add new HIP backends to documentation

update some threads sizes for HIP vs CUDA

add flag to ignore unused function warnings

make tidy changes for HIP

add initial ported hip-shared and hip-gen backends

Merge pull request #671 from CEED/origin/jed/ci-github-ubuntu-20.04

CI: move GitHub Actions to ubuntu 20.04

sphinx: prepare for sphinxcontrib-bibtex 2.0, but pin to <2.0

The new sphinxcontrib-bibtex supports parallel building and requires the
listing of all *.bib sources in bibtex_bibfiles, but it also re

sphinx: prepare for sphinxcontrib-bibtex 2.0, but pin to <2.0

The new sphinxcontrib-bibtex supports parallel building and requires the
listing of all *.bib sources in bibtex_bibfiles, but it also requires
that sphinx be run twice, first to generate a bibtex.json file and then
again to insert the references. I don't know a clean way to do this on
ReadTheDocs so let's stick with 1.x until this issue is resolved or we
need new features.

https://github.com/mcmtroffaes/sphinxcontrib-bibtex/issues/215

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github: move aarch64 and powerpc64le to ubuntu 20.04

github: move workflows to 20.04 from ubuntu-latest

Merge pull request #665 from CEED/valeria/update-citing-info

Update citing info with user manual

.mailmap updates

Fix malformed link in release notes to avoid doc build Warning

Add libCEED's user manual citing info

This replaces the dev site citing info from the README

Merge pull request #669 from rscohn2/main

compiler package name change

Merge pull request #666 from CEED/jeremy/ubuntu2004

actions - use Ubuntu 20.04 for icc

compiler package name change

actions - use 20.04 for icc

Merge pull request #664 from CEED/jeremy/intel-broken-again

Actions - update for change in ICC CI example repo

Actions - update for change in ICC repo

README - update ffi information (#663)

* README - update ffi information

* docs - update release notes

* README - update simple Julia install instructions

Co-authored-by: Valeria Barra <399

README - update ffi information (#663)

* README - update ffi information

* docs - update release notes

* README - update simple Julia install instructions

Co-authored-by: Valeria Barra <39932030+valeriabarra@users.noreply.github.com>

* README - clarify that instructions only to build Rust

* README - reference Rust docs for path deps

Co-authored-by: Valeria Barra <39932030+valeriabarra@users.noreply.github.com>

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Rust interface (#602)

* WIP - first rust files for bindgen

* WIP - more boilerplate, closer to building

* WIP - bindgen builds

* WIP - add Rust job to Travis

* WIP - fix malformed Travis

Rust interface (#602)

* WIP - first rust files for bindgen

* WIP - more boilerplate, closer to building

* WIP - bindgen builds

* WIP - add Rust job to Travis

* WIP - fix malformed Travis yml

* WIP - set Travis to most recent Rust

* WIP - fix include path

* WIP - update travis to specify install/after_success stages

* WIP - add cargo test to Travis job

* WIP - fix linking, for now

* WIP - rust is hard

* Ctx - update notes for Fortran usage

* WIP - small updates

* Fortran - drop unneeded cast

Co-authored-by: Jed Brown <jed@jedbrown.org>

* WIP - more tweaks

* basic skeleton.

* some cleaning.

* Drop the ceed module.

* Move the modules.

* fix mods in vector

* Rewrite vector constructor.

* Scope more precisely unsafe.

* Rename rust_ceed to bind_ceed

* Simplify Vector

* Simplifications

* Add code for ElemRestriction

* Add basis create

* Add create for operator.

* minor

* Interface - use void* for SetData interfaces

* Make - use call quiet for NVCC

* Interface - use void* for GetData interfaces

* WIP - first rust files for bindgen

* WIP - more boilerplate, closer to building

* WIP - bindgen builds

* WIP - add Rust job to Travis

* WIP - fix malformed Travis yml

* WIP - set Travis to most recent Rust

* WIP - fix include path

* WIP - update travis to specify install/after_success stages

* WIP - add cargo test to Travis job

* WIP - fix linking, for now

* WIP - rust is hard

* WIP - small updates

* WIP - more tweaks

* basic skeleton.

* some cleaning.

* Drop the ceed module.

* Move the modules.

* fix mods in vector

* Rewrite vector constructor.

* Scope more precisely unsafe.

* Rename rust_ceed to bind_ceed

* Simplify Vector

* Simplifications

* Add code for ElemRestriction

* Add basis create

* Add create for operator.

* minor

* WIP - add doctest for vector constructor

* rust: cargo fmt

* Add some functions to vector

* Fix rust enum C enum correspondance.

* Add create_tensor_H1_Lagrange

* Add create_H1 in Basis.

* Add basis functions to Ceed.

* rust: use std::ptr::null_mut instead of malloc to get a mutable pointer

* Add apply to Basis.

* WIP - documentation for basis_tensor_H1_Lagrange

* Add accessors and destructor to Basis.

* WIP - more documentation

* WIP - cargo fmt

* WIP - more tests

* Move TransposeMode in lib.rs

* Add constructors and apply to elem_restriction.rs

* WIP - remove extra whitespace

* Add accessors and destructor to ElemRestriction.

* WIP - add some more destructors and such

* WIP - add context constructor to ceed

* WIP - document sync

* make Basis ptr pub.

* make ElemRestriction ptr pub.

* add functions to Operator.

* Add other functions to Operator.

* WIP - add set_array

* WIP - put enums in lib.rs

* rust: use usize for lengths instead of i32

This offers better interop with other Rust libraries. Rust is safer
for avoiding overflow/unsigned bugs.

* rust: create vectors from slices

* WIP - add len

* WIP - hide ceed init in doctest

* WIP - add default init for testing

* WIP - switch set_array to ndarray

* WIP - add get_array/restore_array

* WIP - add get/restore_array_read

* WIP - add basis test code

* WIP - add some elemrestriction testing

* WIP - add basis apply test

* WIP - add display for ceed, vec, rstr, basis

* WIP - use core object for shared functionality for qf/op variants

* WIP - style consistency

* WIP - drop blocked restrictions for now

* WIP - minor style

* WIP - add copyright stuff

* WIP - more documentation stubs

* rust: Vector: use views (coercing to slices) as alternative to unsafe get/restore array

* rust: silence some warnings

* cargo fmt

* close code block

* add constants

* collapse qfunctions back to one class, but still need to find a way to keep users from adding fields/context to by_name qfs

* add viewing of operator tests, shows issue with operator create (but not composite)

* fix printing test, needed to add filds

* basic operator apply and apply_add tests work

* add t501 as main test of entire rust interface

* switch to usize for restr, basis args

* drop get_array, get_array_read

* add mutable view

* clean up tests a little

* minor uniformity

* more uniformity

* clean up dependencies

* drop ndarray and set_array

* drop CopyMode from public interface

* simplify setting LD_LIBRARY_PATH for Travis

* small cleaning

* Remove allow dead_code

* Add Eq to the enum types.

* Refactor unsafe block

* Remove heap allocation of string

* Reorganize use

* Refactor unsafe block

* Refactor Vector

* Rewrite Display for Basis

* Rewrite Display for Ceed

* Rewrite vector_active and vector_none.

* Remove lifetime and use Option type.

* Refactor Display functions

* Remove unused interface.

* Move fmt and CString in the prelude.

* Add minimal doc

* move allow dead_code for ffi only.

* Rename variables.

* Move exceptions in the prelude and change max_buffer_size to uppercase.

* Add a reference counted Ceed struct.

* Revert "Add a reference counted Ceed struct."

This reverts commit 019eb95b99cf0ade62ea19f39e1adb118d209121.

* Remove dead code.

* make OperatorCore pub(crate)/

* Add some documentation.

* cargo fmt

* allow dead code only for OwnPointer, as will never be used

* add tests for diagonal assembly

* drop lazy static as dep

* add cargo fmt to travis

* modify rustfmt in Travis per example

* Rust - list as v0.7

* Rust - add ElemRstrGetVectors

* Rust - drop context

* Rust - return operator tuple from multigrid level creation

* Rust - add test for multigrid creation

* Rust - full set of multigrid tests

* Rust - fmt docstrings

* Rust - style fixes

* minor

* minor doc styling

* Rust - subclass QFunctions

* rust - basic docs info

* restrict some data

* rust - incomplete impl of using closures

* rust - possible qfunction closure solution

* rust - add qf tests, there is a bug (as expected because nothing runs correctly the first time)

* rust - qfunctions seem to work

* rust - assemble pbd tests

* rust - drop qf source, for now GPU not supported, so single source not valuable

* rust - add comment about context usage

* rust - add some composite operator tests/examples

* Travis - add doc deployment

* travis - minor changes to prevent warnings

* travis - deploy on jeremy/rust for testing

* Travis - update url on travis deployment of rust docs

* Rust - doc style fixes

* Rust - use libceed as package name for consistency, add all enums to prelude

* cargo fmt

* travis - minor url fix

* Docs - add Rust docs link

* docs - fix title to include Rust

* Some suggestions.

- avoid anything that can panic inside unsafe blocks (e.g. casting)
- use slice in favor of Vec
- add Basis, ElemRestriction, Operator, QFunction, Vector to the prelude
- Reorganize some of the unsafe blocks

Co-authored-by: Adrien Champion <ptitbatt@hotmail.com>

* rustfmt

* Forgot one

* Switch vec to slice in operator.

* Rust - small test updates

* Rust - drop to_string() for QFunctionByName

* Rust - add doc deployment action

* Rust - gcc not needed for Rust doc deployment

* Rust - temp doc deployment on dev branch

* Rust - rename doc job to build

* Rust - add doc index redirect

* Rust - use &str over String in QFunctionByName

* Rust - use &str for field names as well

* Rust - use MAX_QFUNCTION_FIELDS over 16

* Rust - use high order function in some qf examples

* Rust - more qf editing

* Rust - spelling

* Rust - add debug assertions for all Opts

* Rust - use more idiomatic return in user QFunction examples

* Rust - fmt

* Rust - drop extra lines

* Rust - add a few comments for future ref

* Rust - minor wording

* Rust - minor

* Rust - update QF user function signature

* Rust - minor wording

* Rust - use rust formatting for high order function line breaks

* rust: slightly streamline suggested qfunction notation

* Rust - propegate QF signature improvement

* Rust - drop q from user QF signature

* Rust - fmt

* Rust - minor comments to help readers

* rust: cleaner type signatures on QFunction closures

* rust: infer return type in qfunction closure

* Rust - propegate improved signature

* Rust - more propegation

* Docs - updates with Rust build instructions

* formatting

* more documentation

---

Rust interface initial version

Co-authored-by: Jed Brown <jed@jedbrown.org>
Co-authored-by: Yohann Dudouit <dudouit1@llnl.gov>
Co-authored-by: Adrien Champion <ptitbatt@hotmail.com>

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Merge pull request #662 from CEED/jeremy/python-class

Python - drop class variables