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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/flat_exp.hh>
namespace MiniZinc {
EE flatten_unop(EnvI& env, const Ctx& ctx, Expression* e, VarDecl* r, VarDecl* b) {
CallStackItem _csi(env, e);
UnOp* uo = Expression::cast<UnOp>(e);
bool isBuiltin = uo->decl() == nullptr || uo->decl()->e() == nullptr;
if (isBuiltin) {
switch (uo->op()) {
case UOT_NOT: {
Ctx nctx = ctx;
nctx.b = -nctx.b;
nctx.neg = !nctx.neg;
return flat_exp(env, nctx, uo->e(), r, b);
}
case UOT_PLUS:
return flat_exp(env, ctx, uo->e(), r, b);
case UOT_MINUS: {
GC::lock();
if (UnOp* uo_inner = Expression::dynamicCast<UnOp>(uo->e())) {
if (uo_inner->op() == UOT_MINUS) {
return flat_exp(env, ctx, uo_inner->e(), r, b);
}
}
Expression* zero;
if (Expression::type(uo->e()).bt() == Type::BT_INT) {
zero = IntLit::a(0);
} else {
zero = FloatLit::a(0.0);
}
auto* bo = new BinOp(Location().introduce(), zero, BOT_MINUS, uo->e());
bo->type(uo->type());
KeepAlive ka(bo);
GC::unlock();
return flat_exp(env, ctx, ka(), r, b);
}
default:
throw InternalError("unhandled unary operator");
}
} // else (!isBuiltin)
GC::lock();
Call* c = Call::a(Expression::loc(uo).introduce(), uo->opToString(), {uo->e()});
c->decl(env.model->matchFn(env, c, false));
c->type(uo->type());
KeepAlive ka(c);
GC::unlock();
return flat_exp(env, ctx, c, r, b);
}
} // namespace MiniZinc
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