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c++: introduce api.value.automove

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Based on work by Frank Heckenbach.
See http://lists.gnu.org/archive/html/bug-bison/2018-04/msg00000.html
and http://lists.gnu.org/archive/html/bug-bison/2018-09/msg00019.html.

* data/lalr1.cc (b4_rhs_value): Use YY_MOVE api.rhs.automove is set.
* doc/bison.texi (%define Summary): Document api.rhs.automove.
* examples/variant-11.yy: Use it.

* tests/local.at (AT_AUTOMOVE_IF): New.
* tests/c++.at (Variants): Check move semantics.
This commit is contained in:
Akim Demaille
2018-09-18 19:57:32 +02:00
parent aa5de5728c
commit 3eb9042a30
5 changed files with 141 additions and 4 deletions
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2
tests/local.at
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@@ -139,6 +139,8 @@ m4_define([AT_BISON_OPTION_PUSHDEFS],
m4_define([_AT_BISON_OPTION_PUSHDEFS],
[m4_if([$1$2], $[1]$[2], [],
[m4_fatal([$0: Invalid arguments: $@])])dnl
m4_pushdef([AT_AUTOMOVE_IF],
[m4_bmatch([$3], [%define api\.value\.automove], [$1], [$2])])
m4_pushdef([AT_DEFINES_IF],
[m4_bmatch([$3], [%defines], [$1], [$2])])
m4_pushdef([AT_DEBUG_IF],