Akim Demaille a874011e37 c++: issue a warning with a value is moved several times ...

Suggested by Frank Heckenbach.
http://lists.gnu.org/archive/html/bug-bison/2018-09/msg00022.html

* src/scan-code.l (parse_ref): Check multiple occurrences of rhs
values.
* tests/c++.at (Multiple occurrences of $n and api.value.automove): New.

2018-09-22 11:22:31 +02:00

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