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Make it possible to clone const formulae.

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* src/ltlast/formula.hh, src/ltlast/formula.cc (clone): Declare
as const.
This commit is contained in:
Alexandre Duret-Lutz 2009-11-08 19:36:35 +01:00
parent b0888257f8
commit e44f1b8997
3 changed files with 11 additions and 4 deletions
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6
src/ltlast/formula.cc
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@ -27,10 +27,10 @@ namespace spot
namespace ltl
{
formula*
formula::clone()
formula::clone() const
{
ref_();
return this;
const_cast<formula*>(this)->ref_();
return const_cast<formula*>(this);
}
formula::~formula()