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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2017 Gael Guennebaud <gael.guennebaud@inria.fr>
//
// 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 <valarray>
#include <vector>
#include "main.h"
typedef std::pair<Index,Index> IndexPair;
Index encode(Index i, Index j) {
return i*100 + j;
}
IndexPair decode(Index ij) {
return IndexPair(ij / 100, ij % 100);
}
template<typename T>
bool match(const T& xpr, std::string ref, std::string str_xpr = "") {
std::cout << str_xpr << "\n" << xpr << "\n\n";
std::stringstream str;
str << xpr;
return str.str() == ref;
}
#define MATCH(X,R) match(X, R, #X)
void check_indexed_view()
{
Index n = 10;
ArrayXXi A = ArrayXXi::NullaryExpr(n,n, std::ptr_fun(encode));
for(Index i=0; i<n; ++i)
for(Index j=0; j<n; ++j)
VERIFY( decode(A(i,j)) == IndexPair(i,j) );
ArrayXd eia(10); eia.setRandom();
Array4i eii(4); eii << 3, 1, 6, 5;
std::valarray<double> vala(10); Map<ArrayXd>(&vala[0],10) = eia;
std::valarray<int> vali(4); Map<ArrayXi>(&vali[0],4) = eii;
std::vector<int> veci(4); Map<ArrayXi>(veci.data(),4) = eii;
VERIFY( MATCH( A(3, range(9,3,-1)),
"309 308 307 306 305 304 303")
);
VERIFY( MATCH( A(span(2,5), range(9,3,-1)),
"209 208 207 206 205 204 203\n"
"309 308 307 306 305 304 303\n"
"409 408 407 406 405 404 403\n"
"509 508 507 506 505 504 503\n"
"609 608 607 606 605 604 603")
);
VERIFY( MATCH( A(span(2,5), 5),
"205\n"
"305\n"
"405\n"
"505\n"
"605")
);
VERIFY( MATCH( A(span(last,5,-1), range(2,last)),
"902 903 904 905 906 907 908 909\n"
"802 803 804 805 806 807 808 809\n"
"702 703 704 705 706 707 708 709\n"
"602 603 604 605 606 607 608 609\n"
"502 503 504 505 506 507 508 509")
);
VERIFY( MATCH( A(eii, veci),
"303 301 306 305\n"
"103 101 106 105\n"
"603 601 606 605\n"
"503 501 506 505")
);
VERIFY( MATCH( A(eii, all),
"300 301 302 303 304 305 306 307 308 309\n"
"100 101 102 103 104 105 106 107 108 109\n"
"600 601 602 603 604 605 606 607 608 609\n"
"500 501 502 503 504 505 506 507 508 509")
);
// takes the row numer 3, and repeat it 5 times
VERIFY( MATCH( A(span(3,5,0), all),
"300 301 302 303 304 305 306 307 308 309\n"
"300 301 302 303 304 305 306 307 308 309\n"
"300 301 302 303 304 305 306 307 308 309\n"
"300 301 302 303 304 305 306 307 308 309\n"
"300 301 302 303 304 305 306 307 308 309")
);
}
void test_indexed_view()
{
// for(int i = 0; i < g_repeat; i++) {
CALL_SUBTEST_1( check_indexed_view() );
// }
}
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