Ichthyostega
f9d0d13501
The actual trick to make it work is to use decltype on the function operator http://stackoverflow.com/questions/7943525/is-it-possible-to-figure-out-the-parameter-type-and-return-type-of-a-lambda/7943765#7943765 In addition, we now pick up the functor by template type and store it under that very type. For one, this cuts the size of the generated class by a factor of two. And it gives the compiler the ability to inline a closure as much as is possible, especially when the created Binder / Mutator lives in the same reference frame the closure taps into.
146 lines
3.5 KiB
C++
146 lines
3.5 KiB
C++
/*
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GenericTreeMutator(Test) - customisable intermediary to abstract tree changing operations
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Copyright (C) Lumiera.org
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2015, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include "lib/test/run.hpp"
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#include "lib/test/test-helper.hpp"
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#include "lib/diff/tree-mutator.hpp"
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#include "lib/util.hpp"
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//#include <utility>
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#include <string>
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//#include <vector>
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#include <iostream>
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using util::isnil;
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using std::string;
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//using std::vector;
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//using std::swap;
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using std::cout;
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using std::endl;
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using lib::test::showType;
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using lib::test::demangleCxx;
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namespace lib {
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namespace diff{
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namespace test{
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// using lumiera::error::LUMIERA_ERROR_LOGIC;
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namespace {//Test fixture....
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}//(End)Test fixture
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/*****************************************************************************//**
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* @test Demonstrate a customisable component for flexible bindings
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* to enable generic tree changing and mutating operations to
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* arbitrary hierarchical data structures.
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*
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* @see TreeMutator
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* @see GenNodeBasic_test
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* @see GenNodeBasic_test
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* @see GenericTreeRepresentation_test
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*/
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class GenericTreeMutator_test : public Test
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{
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virtual void
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run (Arg)
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{
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simpleAttributeBinding();
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verifySnapshot();
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sequenceIteration();
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duplicateDetection();
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copy_and_move();
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}
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void
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simpleAttributeBinding()
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{
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string localData;
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auto mutator =
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TreeMutator::build()
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.change("data", [&](string val)
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{
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cout << "\"data\" closure received something "<<val<<endl;
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localData = val;
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});
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cout << "concrete TreeMutator size=" << sizeof(mutator)
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<< " type="<< demangleCxx (showType (mutator))
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<< endl;
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CHECK (isnil (localData));
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Attribute testAttribute(string ("that would be acceptable"));
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mutator.setAttribute ("lore", testAttribute);
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CHECK ( isnil (localData)); // nothing happens, nothing changed
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mutator.setAttribute ("data", testAttribute);
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CHECK (!isnil (localData));
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cout << "localData changed to: "<<localData<<endl;
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CHECK (localData == "that would be acceptable");
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}
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void
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verifySnapshot()
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{
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}
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void
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sequenceIteration()
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{
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}
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void
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duplicateDetection()
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{
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}
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void
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copy_and_move()
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{
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}
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};
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/** Register this test class... */
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LAUNCHER (GenericTreeMutator_test, "unit common");
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}}} // namespace lib::diff::test
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