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e2bc7ffae3
RefChanger temporarily assigns a value to a non-const reference of any
kind. RefChanger provides a flexible and uniform generalisation of the various
scope guards previously derived from the old Changer class in MetricsInfo.h.
As before, a temporary assignment lasts as long as the Changer object lives. But
the new Changer is movable. In particular, contorsions are no longer needed to
change a private field. Special code can be moved into the appropriate classes,
and it is no longer necessary to create a new class for each specific use.
Syntax change:
FontSetChanger dummy(mi.base, value);
-> Changer dummy = mi.base.changeFontSet(value);
New function for generating arbitrary Changers:
Changer dummy = make_change(ref, val, condition);
Bugfix:
* Fix the display of \displaystyle{\substack{\frac{xyz}{}}} (missing style
change).
33 lines
556 B
C++
33 lines
556 B
C++
// -*- C++ -*-
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/**
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* \file Changer.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Guillaume Munch
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef LYX_CHANGER_H
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#define LYX_CHANGER_H
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#include "support/unique_ptr.h"
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namespace lyx {
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// Forward declaration for support/RefChanger.h
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struct Revertible {
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virtual ~Revertible() {}
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virtual void revert() {}
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virtual void keep() {}
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};
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using Changer = unique_ptr<Revertible>;
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}
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#endif //LYX_CHANGER_H
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