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types/tagged: add const accessor

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This commit is contained in:
Danny Robson 2019-03-11 12:11:03 +11:00
parent 8c42829f4f
commit d124fffcb3
1 changed files with 10 additions and 1 deletions
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11
types/tagged.hpp
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@ -92,11 +92,20 @@ namespace cruft {
InnerT&
get (void)&
{
CHECK_EQ (InnerT::tag, m_tag);
CHECK (InnerT::tag == m_tag);
return *cruft::cast::alignment<InnerT*> (m_data + 0);
}
template <typename InnerT>
InnerT const&
get (void) const&
{
CHECK (InnerT::tag == m_tag);
return *cruft::cast::alignment<InnerT const*> (m_data + 0);
}
/// Set the inner member to a supplied value and store the associated
/// type code.
template <typename InnerT>