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// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
// SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
// SPDX-FileContributor: 2023-23 Bradley M. Bell
# include <cppad/local/val_graph/tape.hpp>
/*
{xrst_begin val_csum_xam.cpp dev}
Cumulative Summation Value Operator Example
###########################################
{xrst_literal
// BEGIN_C++
// END_C++
}
{xrst_end val_csum_xam.cpp}
*/
// BEGIN_C++
bool csum_xam(void)
{ bool ok = true;
//
// tape_t, Vector, addr_t, csum_op_enum;
using CppAD::local::val_graph::tape_t;
using CppAD::local::val_graph::Vector;
using CppAD::local::val_graph::addr_t;
//
// tape, ok
tape_t<double> tape;
addr_t n_ind = 2;
addr_t index_of_nan = tape.set_ind(n_ind);
ok &= index_of_nan == n_ind;
//
// p0, p1
addr_t p0 = tape.record_con_op(5.0);
addr_t p1 = tape.record_con_op(6.0);
//
// add
Vector<addr_t> add(2), sub(2);
add[0] = 0; // x[0]
add[1] = 1; // x[1]
sub[0] = p0; // 5.0
sub[1] = p1; // 6.0
//
// dep_vec, tape
Vector<addr_t> dep_vec(1);
dep_vec[0] = tape.record_csum_op(add, sub); // x[0] + x[1] - 5.0 - 6.0
//
// set_dep
tape.set_dep( dep_vec );
//
// x
Vector<double> x(2);
x[0] = 3.0;
x[1] = 4.0;
//
// trace
bool trace = false;
//
// val_vec
Vector<double> val_vec( tape.n_val() );
for(addr_t i = 0; i < n_ind; ++i)
val_vec[i] = x[i];
tape.eval(trace, val_vec);
//
// ok
ok &= tape.n_op() == 4;
ok &= tape.con_vec().size() == 3;
ok &= tape.arg_vec().size() == 3 + 7;
ok &= tape.n_val() == n_ind + 4;
//
// y
Vector<double> y(1);
y[0] = val_vec[ dep_vec[0] ];
//
// ok
ok &= y[0] == x[0] + x[1] - 11.0;
//
return ok;
}
// END_C++
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