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c++: use modern idioms to make classes non-copyable

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Reported by Don Macpherson.
https://lists.gnu.org/r/bug-bison/2019-05/msg00015.html
https://github.com/akimd/bison/issues/36

* data/skeletons/lalr1.cc, data/skeletons/stack.hh,
* data/skeletons/variant.hh: Delete the copy-ctor and the copy operator.
This commit is contained in:
Akim Demaille
2020-05-01 06:36:19 +02:00
parent fb1d76d9a9
commit 30357ae942
4 changed files with 37 additions and 5 deletions
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14
data/skeletons/variant.hh
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@@ -115,6 +115,13 @@ m4_define([b4_value_type_declare],
new (yyas_<T> ()) T (YY_MOVE (t));
}
#if 201103L <= YY_CPLUSPLUS
/// Non copyable.
semantic_type (const self_type&) = delete;
/// Non copyable.
self_type& operator= (const self_type&) = delete;
#endif
/// Destruction, allowed only if empty.
~semantic_type () YY_NOEXCEPT
{]b4_parse_assert_if([
@@ -258,9 +265,12 @@ m4_define([b4_value_type_declare],
}
private:
/// Prohibit blind copies.
self_type& operator= (const self_type&);
#if YY_CPLUSPLUS < 201103L
/// Non copyable.
semantic_type (const self_type&);
/// Non copyable.
self_type& operator= (const self_type&);
#endif
/// Accessor to raw memory as \a T.
template <typename T>