[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Regression in Bison 3.2 with variant semantic values in C++ parsers
From: |
Akim Demaille |
Subject: |
Re: Regression in Bison 3.2 with variant semantic values in C++ parsers |
Date: |
Tue, 20 Nov 2018 18:33:40 +0100 |
Hi Sébastien.
> Le 20 nov. 2018 à 15:21, Sébastien Villemot <address@hidden> a écrit :
>
> Dear Bison developers,
>
> Between Bison 3.0 and 3.2, a regression has appeared in C++ parsers
> with variant semantic values. More precisely, it is no longer possible
> to use a C++ type which has a comma in it (e.g. pair<int,int>), since
> that interferes with a macro that has been introduced.
>
> I attach a minimal example. It compiles fine with Bison 3.0, but with
> Bison 3.2 I get:
>
> In file included from test.yy:7:
> test.tab.hh:507:77: error: macro "YY_RVREF" passed 2 arguments, but takes
> just 1
> basic_symbol (typename Base::kind_type t, YY_RVREF
> (std::pair<int,int>) v);
> ^
> test.tab.cc:178:101: error: macro "YY_RVREF" passed 2 arguments, but takes
> just 1
> parser::basic_symbol<Base>::basic_symbol (typename Base::kind_type t,
> YY_RVREF (std::pair<int,int>) v)
>
> ^
> In file included from test.yy:7:
> test.tab.hh:507:49: error: 'YY_RVREF' has not been declared
> basic_symbol (typename Base::kind_type t, YY_RVREF
> (std::pair<int,int>) v);
> ^~~~~~~~
> test.tab.cc:178:73: error: 'YY_RVREF' has not been declared
> parser::basic_symbol<Base>::basic_symbol (typename Base::kind_type t,
> YY_RVREF (std::pair<int,int>) v)
>
> ^~~~~~~~
>
> Maybe you don't consider this as a bug (since it can be easily worked
> around with a typedef/using), but at the very least it should be
> documented.
Rest assured that this is definitely a bug. A stupid one actually.
I’ll wrap a 3.2.2 asap.
What project was hit?