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[HG DOLFIN] Throw an error if requested la backend is not available.

To: dolfin-dev@xxxxxxxxxx
From: dolfin@xxxxxxxxxx (DOLFIN)
Date: Fri, 8 Aug 2008 12:55:52 +0200 (CEST)
Delivered-to: dolfin-dev@xxxxxxxxxx

One or more new changesets pushed to the primary dolfin repository.
A short summary of the last three changesets is included below.

changeset:   4525:40f3ab220fc7c2b13cda4a93c0adaf2a9a4c9b1b
tag:         tip
user:        "Garth N. Wells <gnw20@xxxxxxxxx>"
date:        Fri Aug 08 11:55:41 2008 +0100
files:       dolfin/la/DefaultFactory.cpp
description:
Throw an error if requested la backend is not available.


changeset:   4524:5b7c74ccf9d148d25762b30d2bebb284a3f8baf8
parent:      4523:3d2503dcf8df4cfba6c9d7265ca32ad2e80fe84f
parent:      4522:a2912dadbe1ccae447ce195a8d782472c28f3e6e
user:        Anders Logg <logg@xxxxxxxxx>
date:        Thu Aug 07 20:33:14 2008 +0200
files:       
description:
merge


changeset:   4523:3d2503dcf8df4cfba6c9d7265ca32ad2e80fe84f
parent:      4520:8169b67676893e70f82c324379ae111c785b90d9
user:        Anders Logg <logg@xxxxxxxxx>
date:        Thu Aug 07 20:33:02 2008 +0200
files:       dolfin/fem/Assembler.cpp dolfin/fem/SparsityPatternBuilder.cpp dolfin/la/GenericMatrix.h dolfin/la/GenericSparsityPattern.h dolfin/la/GenericTensor.h dolfin/la/GenericVector.h dolfin/la/LinearAlgebraFactory.h dolfin/la/STLFactory.h dolfin/la/Scalar.h
description:
Add init() function to GenericTensor and allow sparsity pattern to
not be initialized if not required by the linear backend. Gives
very good speedups for STL which does not need to be initialized.

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For more details, visit http://www.fenics.org/hg/dolfin