Ichthyostega
afa7ca2e4d
The Lumiera »Reference Platform« is now upgraded to Debian/Buster, which provides GCC-14 and Clang-20. Thus the compiler support for C++20 language features seems solid enough, and C++23, while still in ''experimental stage'' can be seen as a complement and addendum. This changeset * upgrades the compile switches for the build system * provides all the necessary adjustments to keep the code base compilable Notable changes: * λ-capture by value now requires explicit qualification how to handle `this` * comparison operators are now handled transparently by the core language, largely obsoleting boost::operators. This change incurs several changes to implicit handling rules and causes lots of ambiguities — which typically pinpoint some long standing design issues, especially related to MObjects and the ''time entities''. Most tweaks done here can be ''considered preliminary'' * unfortunately the upgraded standard ''fails'' to handle **tuple-like** entities in a satisfactory way — rather an ''exposition-only'' concept is introduced, which applies solely to some containers from the STL, thereby breaking some very crucial code in the render entities, which was built upon the notion of ''tuple-like'' entities and the ''tuple protocol''. The solution is to abandon the STL in this respect and **provide an alternative implementation** of the `apply` function and related elements.
79 lines
1.8 KiB
C++
79 lines
1.8 KiB
C++
/*
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ABSTRACTMO.hpp - abstract base class for all Media Objects
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Copyright (C)
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2008, 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 abstractmo.hpp
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** @todo result of the very first code generation from UML in 2008. Relevance not clear yet...
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*/
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#ifndef MOBJECT_SESSION_ABSTRACTMO_H
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#define MOBJECT_SESSION_ABSTRACTMO_H
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#include "steam/mobject/mobject.hpp"
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#include "lib/symbol.hpp"
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namespace steam {
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namespace mobject {
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namespace session {
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namespace error = lumiera::error;
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/**
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* abstract base class of all MObjects for providing common services.
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* @todo seems that we don't need this intermediate class...
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*/
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class AbstractMO
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: public MObject
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{
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/* === some default implementations === */
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DEFINE_PROCESSABLE_BY (builder::BuilderTool);
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string
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initShortID() const
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{
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return buildShortID("MObject");
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}
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public:
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Duration&
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getLength()
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{
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return length_;
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}
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bool isEquivalentTo (const MObject& oo) const override;
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protected:
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void
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throwIfInvalid() const
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{
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if (!isValid())
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throw error::Fatal ("Invalid MObject in model. Indicates a race "
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"or similarly broken internal assumptions.");
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}
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string buildShortID (lib::Literal typeID, string suffix ="") const;
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};
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}}} // namespace steam::mobject::session
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#endif
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