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c++: using macros around user types breaks when they include comma

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We may generate code such as

    basic_symbol (typename Base::kind_type t, YY_RVREF (std::pair<int,int>) v);

which, of course, breaks, because YY_RVREF sees two arguments.  Let's
not play tricks with _VA_ARGS__, I'm unsure about it portability.
Anyway, I plan to change more things in this area.

Reported by Sébastien Villemot.
http://lists.gnu.org/archive/html/bug-bison/2018-11/msg00014.html

* data/variant.hh (b4_basic_symbol_constructor_declare)
(b4_basic_symbol_constructor_define): Don't use macro on user types.
* tests/types.at: Check that we support pairs.
This commit is contained in:
Akim Demaille
2018-11-20 19:28:12 +01:00
parent b72d654fa2
commit 4e510c69b1
3 changed files with 46 additions and 9 deletions
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36
data/variant.hh
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@@ -379,26 +379,44 @@ b4_join(b4_symbol_if([$1], [has_type],
# -----------------------------------
# Generate a constructor declaration for basic_symbol from given type.
m4_define([b4_basic_symbol_constructor_declare],
[[ basic_symbol (]b4_join(
[[# if 201103L <= YY_CPLUSPLUS
basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_symbol_if([$1], [has_type], [YY_RVREF (b4_symbol([$1], [type])) v]),
b4_locations_if([YY_RVREF (location_type) l]))[);
b4_symbol_if([$1], [has_type], [b4_symbol([$1], [type])&& v]),
b4_locations_if([location_type&& l]))[);
#else
basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_symbol_if([$1], [has_type], [const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l]))[);
#endif
]])
# b4_basic_symbol_constructor_define
# ----------------------------------
# Generate a constructor implementation for basic_symbol from given type.
m4_define([b4_basic_symbol_constructor_define],
[[ template <typename Base>
[[# if 201103L <= YY_CPLUSPLUS
template <typename Base>
]b4_parser_class_name[::basic_symbol<Base>::basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_symbol_if([$1], [has_type], [YY_RVREF (b4_symbol([$1], [type])) v]),
b4_locations_if([YY_RVREF (location_type) l]))[)
b4_symbol_if([$1], [has_type], [b4_symbol([$1], [type])&& v]),
b4_locations_if([location_type&& l]))[)
: Base (t)]b4_symbol_if([$1], [has_type], [
, value (YY_MOVE (v))])[]b4_locations_if([
, location (YY_MOVE (l))])[
, value (std::move (v))])[]b4_locations_if([
, location (std::move (l))])[
{}
#else
template <typename Base>
]b4_parser_class_name[::basic_symbol<Base>::basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_symbol_if([$1], [has_type], [const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l]))[)
: Base (t)]b4_symbol_if([$1], [has_type], [
, value (v)])[]b4_locations_if([
, location (l)])[
{}
#endif
]])
# b4_symbol_constructor_define