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[HG UFL] Unit tests and bugfixes for evaluation, for example:

To: ufl-dev@xxxxxxxxxx
From: ufl@xxxxxxxxxx (UFL)
Date: Fri, 13 Feb 2009 14:36:05 +0100 (CET)
Delivered-to: ufl-dev@xxxxxxxxxx

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

changeset:   571:4bd3d69f02b53e26b1b631d46e5b26577d25b55e
tag:         tip
user:        "Martin Sandve AlnÃ¦s <martinal@xxxxxxxxx>"
date:        Fri Feb 13 14:36:03 2009 +0100
files:       test/evaluate.py test/manualtest.py ufl/algorithms/ad.py ufl/geometry.py ufl/indexsum.py
description:
Unit tests and bugfixes for evaluation, for example:

        cell = triangle
        x = cell.x
        I = Identity(cell.d)
        s = (x[i]*x[j])*I[i,j]
        e = s((5,7))
        #v = sum_i sum_j x_i x_j delta_ij = x_0 x_0 + x_1 x_1
        v = 5**2 + 7**2
        self.assertTrue(e == v)


changeset:   570:3ae30e3fe38568b9c26fe18f358e760ffbdb9b79
user:        "Martin Sandve AlnÃ¦s <martinal@xxxxxxxxx>"
date:        Fri Feb 13 13:28:04 2009 +0100
files:       ufl/algorithms/formtransformations.py ufl/algorithms/forward_ad.py ufl/algorithms/ufl2latex.py ufl/classes.py ufl/form.py ufl/formoperators.py ufl/integral.py ufl/objects.py
description:
Split Integral into Integral and Measure,
inspired by the wording in the manual
"dx is a measure for integration".
Metadata for integration options is
associated with the Measure, and an
Integral has an Expr (integrand) and a Measure.

Fixed Form such that integrals with
measures differing only by metadata
are not combined.


changeset:   569:7f21dc7c6510b9ed65479b5879e1df6956e9f6b3
user:        "Martin Sandve AlnÃ¦s <martinal@xxxxxxxxx>"
date:        Fri Feb 13 11:23:29 2009 +0100
files:       ufl/algorithms/ad.py ufl/algorithms/forward_ad.py ufl/algorithms/graph.py ufl/algorithms/transformations.py ufl/classes.py ufl/conditional.py ufl/differentiation.py ufl/expr.py ufl/mathfunctions.py ufl/restriction.py ufl/terminal.py
description:
Added class Operator, which all non-Terminals now inherit from.
Added function reconstruct, more intuitive than using _uflclass directly.

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