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Adding field update feature

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2015-01-03 01:27:52 -08:00
parent a296023823
commit 129e048a1b
10 changed files with 221 additions and 24 deletions
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26
src/ast/rewriter/datatype_rewriter.cpp
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@ -60,6 +60,32 @@ br_status datatype_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr
UNREACHABLE();
break;
}
case OP_DT_UPDATE_FIELD: {
SASSERT(num_args == 2);
if (!is_app(args[0]) || !m_util.is_constructor(to_app(args[0])))
return BR_FAILED;
app * a = to_app(args[0]);
func_decl * c_decl = a->get_decl();
if (c_decl != m_util.get_accessor_constructor(f)) {
result = a;
return BR_DONE;
}
ptr_vector<func_decl> const * acc = m_util.get_constructor_accessors(c_decl);
SASSERT(acc && acc->size() == a->get_num_args());
unsigned num = acc->size();
ptr_buffer<expr> new_args;
for (unsigned i = 0; i < num; ++i) {
if (f == (*acc)[i]) {
new_args.push_back(args[1]);
}
else {
new_args.push_back(a->get_arg(i));
}
}
result = m().mk_app(c_decl, num, new_args.c_ptr());
return BR_DONE;
}
default:
UNREACHABLE();
}