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author | Akim Demaille <akim.demaille@gmail.com> | 2020-12-14 20:26:41 +0100 |
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committer | Akim Demaille <akim.demaille@gmail.com> | 2020-12-20 18:41:42 +0100 |
commit | 0a82316e54fead8c3f1cf41d2213c868ab88f508 (patch) | |
tree | 5a00b7bfa63ceae3336e89c95413b30048599627 /NEWS | |
parent | 611348e67bd45dcf0322e9a32ce7160c008c3e26 (diff) | |
download | bison-0a82316e54fead8c3f1cf41d2213c868ab88f508.tar.gz |
glr2.cc: example: use objects (not pointers) to represent the AST
Currently we are using pointers. The whole point of
glr2.cc (vs. glr.cc) is precisely to allow genuine C++ objects to be
semantic values. Let's make that work.
* data/skeletons/glr2.cc (glr_state::glr_state): Be sure to initialize
yysval.
(glr_state): Add copy-ctor, assignment and dtor.
(glr_state::copyFrom): Be sure to initialize the destination if it was
not.
(glr_state::~glr_state): Destroy the semantic value.
* examples/c++/glr/ast.hh: Rewrite so that we use genuine objects,
rather than a traditional OOP hierarchy that requires to deal with
pointers.
With help from Bruno Belanyi <bruno.belanyi@epita.fr>.
* examples/c++/glr/c++-types.yy: Remove memory management.
Use true objects.
(main): Don't reach yydebug directly.
* examples/c++/glr/local.mk: We need C++11.
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