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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Guido Tack <guido.tack@monash.edu>
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <minizinc/ast.hh>
#include <minizinc/flat_exp.hh>
namespace MiniZinc {
EE flatten_arraylit(EnvI& env, const Ctx& ctx, Expression* e, VarDecl* r, VarDecl* b) {
CallStackItem _csi(env, e);
EE ret;
auto* al = Expression::cast<ArrayLit>(e);
if (al->flat()) {
ret.b = bind(env, Ctx(), b, env.constants.literalTrue);
ret.r = bind(env, Ctx(), r, al);
} else {
VarDecl* rr = r == env.constants.varIgnore ? env.constants.varTrue : nullptr;
bool c_root = ctx.b == C_ROOT && r != env.constants.varIgnore;
Ctx eval_ctx = ctx;
std::vector<EE> elems_ee(al->size());
if (al->type().istuple() || al->type().isrecord()) {
// Struct types have to check if any element is boolean to ensure correct context
for (unsigned int i = al->size(); (i--) != 0U;) {
eval_ctx = ctx;
if (c_root && Expression::type((*al)[i]).isbool()) {
eval_ctx.b = C_MIX;
}
elems_ee[i] = flat_exp(env, eval_ctx, (*al)[i], rr, ctx.partialityVar(env));
}
} else {
if (c_root && Expression::type(e).bt() == Type::BT_BOOL &&
Expression::type(e).st() == Type::ST_PLAIN) {
eval_ctx.b = C_MIX;
}
for (unsigned int i = al->size(); (i--) != 0U;) {
elems_ee[i] = flat_exp(env, eval_ctx, (*al)[i], rr, ctx.partialityVar(env));
}
}
std::vector<Expression*> elems(elems_ee.size());
for (auto i = static_cast<unsigned int>(elems.size()); (i--) != 0U;) {
elems[i] = elems_ee[i].r();
}
std::vector<std::pair<int, int> > dims(al->dims());
for (unsigned int i = al->dims(); (i--) != 0U;) {
dims[i] = std::pair<int, int>(al->min(i), al->max(i));
}
KeepAlive ka;
{
GCLock lock;
if (al->type().istuple() || al->type().isrecord()) {
assert(dims.size() == 1 && dims[0].first == 1 && dims[0].second == al->size());
auto* alr = ArrayLit::constructTuple(Expression::loc(al).introduce(), elems);
alr->type(al->type());
alr->flat(true);
// Add reverse mapper for tuple literal containing variables
VarDecl* vd = new_vardecl(env, Ctx(), new TypeInst(Location().introduce(), al->type()),
nullptr, nullptr, alr);
vd->ti()->setStructDomain(env, al->type());
env.reverseMappers.insert(vd->id(), alr);
ka = vd->id();
} else {
auto* alr = new ArrayLit(Expression::loc(al).introduce(), elems, dims);
alr->type(al->type());
alr->flat(true);
ka = alr;
}
}
ret.b = conj(env, b, Ctx(), elems_ee);
ret.r = bind(env, Ctx(), r, ka());
}
return ret;
}
} // namespace MiniZinc
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