Akim Demaille 10591c8879 c++: also provide a copy constructor for symbol_type ...

Suggested by Wolfgang Thaller.
http://lists.gnu.org/archive/html/bug-bison/2018-12/msg00081.html

* data/c++.m4 (basic_symbol, by_type): Instead of provide either move
or copy constructor, always provide the copy one.
* tests/c++.at (C++ Variant-based Symbols Unit Tests): Check it.

2018-12-24 19:03:32 +01:00

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