Ichthyostega
20f3252892
Yet another chainsaw massacre. One of the most obnoxious annoyances with C++ metaprogramming is the need to insert `typename` and `template` qualifiers into most definitions, to help the compiler to cope with the syntax, which is not context-free. The recent standards adds several clarifications, so that most of these qualifiers are redundant now, at least at places where it is unambiguously clear that only a type can be given. GCC already supports most of these relaxing rules (Clang unfortunately lags way behind with support of newer language features...)
142 lines
5 KiB
C++
142 lines
5 KiB
C++
/*
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ScopeQuery(Test) - running queries to discover container contents, filtering (sub)types
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Copyright (C)
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2009, Hermann Vosseler <Ichthyostega@web.de>
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**Lumiera** is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version. See the file COPYING for further details.
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* *****************************************************************/
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/** @file scope-query-test.cpp
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** unit test \ref ScopeQuery_test
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*/
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#include "lib/test/run.hpp"
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#include "steam/mobject/session/scope-query.hpp"
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#include "steam/mobject/session/specific-contents-query.hpp"
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#include "steam/mobject/session/session-service-explore-scope.hpp"
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#include "steam/mobject/session/test-scopes.hpp"
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#include "steam/mobject/session/clip.hpp"
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#include "lib/format-cout.hpp"
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#include "lib/symbol.hpp"
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#include "lib/util.hpp"
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#include <string>
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namespace steam {
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namespace mobject {
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namespace session {
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namespace test {
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using util::contains;
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using lib::Literal;
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using std::string;
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namespace { // helpers and shortcuts....
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/** a filter predicate to pick some objects from a resultset.
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* @note using the specific API of DummyMO, without cast! */
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bool
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filter (Placement<DummyMO> const& candidate)
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{
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string desc = candidate->operator string();
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return contains(desc, "MO2");
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}
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template<class IT>
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void
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pullOut (IT const& iter)
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{
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for (IT elm(iter);
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elm; ++elm)
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cout << *elm << endl;
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}
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void
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announce (Literal description)
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{
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static uint nr(0);
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cout << "--------------------------------Test-"<< ++nr << ": " << description << endl;
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}
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}
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/******************************************************************************************//**
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* @test how to discover contents or location of a container-like part of the high-level model.
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* As this container-like object is just a concept and actually implemented by the
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* PlacementIndex, this means querying the index for elements registered with
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* a given scope or finding the enclosing scopes. The discovered
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* elements will be filtered by a runtime type check.
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*
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* @todo change that to use a more realistic test session, based on the actual model types //////////////// TICKET #532
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*
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* @see mobject::session::PlacementIndex
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* @see mobject::session::QueryResolver
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* @see mobject::session::ContentsQuery
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*/
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class ScopeQuery_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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// Prepare an (test)Index (dummy "session")
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PPIdx testSession (build_testScopes());
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PlacementMO const& scope = SessionServiceExploreScope::getScopeRoot();
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discover (ScopeQuery<MObject> (scope, CONTENTS) , "contents depth-first");
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discover (ScopeQuery<Clip> (scope, CONTENTS) , "contents depth-first, filtered to Clip");
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discover (ScopeQuery<DummyMO> (scope, CONTENTS) , "contents depth-first, filtered to DummyMO"); ////////////////////// TICKET #532
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discover (ScopeQuery<TestSubMO1> (scope, CONTENTS) , "contents depth-first, filtered to TestSubMO1");
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discover (ScopeQuery<TestSubMO2> (scope, CONTENTS) , "contents depth-first, filtered to TestSubMO2");
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discover (pickAllSuitable(scope, filter) , "contents depth-first, custom filtered DummyMO");
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// note filter is typed to accept DummyMO
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ScopeQuery<TestSubMO21> allM021(scope, CONTENTS);
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ScopeQuery<TestSubMO21>::iterator specialEl (issue(allM021));
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++specialEl; // step in to second solution found...
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CHECK (specialEl);
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discover (ScopeQuery<MObject> (*specialEl, PARENTS) , "parents of the second TestSubMO2 element found");
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discover (ScopeQuery<MObject> (*specialEl, CHILDREN), "children of the this TestSubMO2 element");
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discover (ScopeQuery<MObject> (*specialEl, PATH) , "path from there to root");
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discover (ScopeQuery<TestSubMO2> (*specialEl, PATH) , "same path, but filtered to TestSubMO2");
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announce ( "continue exploring partially used TestSubMO2 iterator");
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pullOut (specialEl);
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}
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template<class MO>
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static void
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discover (ScopeQuery<MO> const& query, Literal description)
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{
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announce (description);
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pullOut (issue(query));
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}
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template<class MO>
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static ScopeQuery<MO>::iterator
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issue (ScopeQuery<MO> const& query)
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{
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return query.resolveBy(SessionServiceExploreScope::getResolver());
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}
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};
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/** Register this test class... */
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LAUNCHER (ScopeQuery_test, "unit session");
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}}}} // namespace steam::mobject::session::test
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