Happy New Year!

[ginac.git] / check / exam_indexed.cpp

diff --git a/check/exam_indexed.cpp b/check/exam_indexed.cpp
index 9deb4870e6bbf492971f32856ca2cee240005074..34dde3b203240ac1c66f29468ba2ffd4d6b6b762 100644 (file)
--- a/check/exam_indexed.cpp
+++ b/check/exam_indexed.cpp
@@ -3,7 +3,7 @@
  *  Here we test manipulations on GiNaC's indexed objects. */
 
 /*
- *  GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2019 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -17,10 +17,14 @@
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#include "exams.h"
+#include "ginac.h"
+using namespace GiNaC;
+
+#include <iostream>
+using namespace std;
 
 static unsigned check_equal(const ex &e1, const ex &e2)
 {
@@ -240,18 +244,16 @@ static unsigned edyn_check()
        symbol Bx("Bx"), By("By"), Bz("Bz");
 
        // Lorentz transformation matrix (boost along x axis)
-       matrix L(4, 4);
-       L =       gamma, -beta*gamma, 0, 0,
-           -beta*gamma,       gamma, 0, 0,
-                     0,           0, 1, 0,
-                     0,           0, 0, 1;
+       matrix L = {{      gamma, -beta*gamma, 0, 0},
+                   {-beta*gamma,       gamma, 0, 0},
+                   {          0,           0, 1, 0},
+                   {          0,           0, 0, 1}};
 
        // Electromagnetic field tensor
-       matrix F(4, 4);
-       F =  0, -Ex, -Ey, -Ez,
-               Ex,   0, -Bz,  By,
-               Ey,  Bz,   0, -Bx,
-               Ez, -By,  Bx,   0;
+       matrix F = {{ 0, -Ex, -Ey, -Ez},
+                   {Ex,   0, -Bz,  By},
+                   {Ey,  Bz,   0, -Bx},
+                   {Ez, -By,  Bx,   0}};
 
        // Indices
        symbol s_mu("mu"), s_nu("nu"), s_rho("rho"), s_sigma("sigma");
@@ -263,12 +265,12 @@ static unsigned edyn_check()
              * indexed(F, rho, sigma)).simplify_indexed();
 
        // Extract transformed electric and magnetic fields
-       ex Ex_p = e.subs(lst(mu == 1, nu == 0)).normal();
-       ex Ey_p = e.subs(lst(mu == 2, nu == 0)).normal();
-       ex Ez_p = e.subs(lst(mu == 3, nu == 0)).normal();
-       ex Bx_p = e.subs(lst(mu == 3, nu == 2)).normal();
-       ex By_p = e.subs(lst(mu == 1, nu == 3)).normal();
-       ex Bz_p = e.subs(lst(mu == 2, nu == 1)).normal();
+       ex Ex_p = e.subs(lst{mu == 1, nu == 0}).normal();
+       ex Ey_p = e.subs(lst{mu == 2, nu == 0}).normal();
+       ex Ez_p = e.subs(lst{mu == 3, nu == 0}).normal();
+       ex Bx_p = e.subs(lst{mu == 3, nu == 2}).normal();
+       ex By_p = e.subs(lst{mu == 1, nu == 3}).normal();
+       ex Bz_p = e.subs(lst{mu == 2, nu == 1}).normal();
 
        // Check results
        result += check_equal(Ex_p, Ex);
@@ -281,7 +283,7 @@ static unsigned edyn_check()
        // Test 2: check energy density and Poynting vector of electromagnetic field
 
        // Minkowski metric
-       ex eta = diag_matrix(lst(1, -1, -1, -1));
+       ex eta = diag_matrix(lst{1, -1, -1, -1});
 
        // Covariant field tensor
        ex F_mu_nu = (indexed(eta, mu.toggle_variance(), rho.toggle_variance())
@@ -290,16 +292,16 @@ static unsigned edyn_check()
 
        // Energy-momentum tensor
        ex T = (-indexed(eta, rho, sigma) * F_mu_nu.subs(s_nu == s_rho) 
-               * F_mu_nu.subs(lst(s_mu == s_nu, s_nu == s_sigma))
+               * F_mu_nu.subs(lst{s_mu == s_nu, s_nu == s_sigma})
              + indexed(eta, mu.toggle_variance(), nu.toggle_variance())
-               * F_mu_nu.subs(lst(s_mu == s_rho, s_nu == s_sigma))
+               * F_mu_nu.subs(lst{s_mu == s_rho, s_nu == s_sigma})
                * indexed(F, rho, sigma) / 4).simplify_indexed() / (4 * Pi);
 
        // Extract energy density and Poynting vector
-       ex E = T.subs(lst(s_mu == 0, s_nu == 0)).normal();
-       ex Px = T.subs(lst(s_mu == 0, s_nu == 1));
-       ex Py = T.subs(lst(s_mu == 0, s_nu == 2)); 
-       ex Pz = T.subs(lst(s_mu == 0, s_nu == 3));
+       ex E = T.subs(lst{s_mu == 0, s_nu == 0}).normal();
+       ex Px = T.subs(lst{s_mu == 0, s_nu == 1});
+       ex Py = T.subs(lst{s_mu == 0, s_nu == 2});
+       ex Pz = T.subs(lst{s_mu == 0, s_nu == 3});
 
        // Check results
        result += check_equal(E, (Ex*Ex+Ey*Ey+Ez*Ez+Bx*Bx+By*By+Bz*Bz) / (8 * Pi));
@@ -375,6 +377,15 @@ static unsigned dummy_check()
        e = indexed(p, mu.toggle_variance(), mu) - indexed(p, nu, nu.toggle_variance());
        result += check_equal_simplify(e, 0);
 
+       // GiNaC 1.2.1 had a bug here because p.i*p.i -> (p.i)^2
+       e = indexed(p, i) * indexed(p, i) * indexed(p, j) + indexed(p, j);
+       ex fi = exprseq(e.get_free_indices());
+       if (!fi.is_equal(exprseq{j})) {
+               clog << "get_free_indices(" << e << ") erroneously returned "
+                    << fi << " instead of (.j)" << endl;
+               ++result;
+       }
+
        return result;
 }
 
@@ -383,7 +394,6 @@ unsigned exam_indexed()
        unsigned result = 0;
        
        cout << "examining indexed objects" << flush;
-       clog << "----------indexed objects:" << endl;
 
        result += delta_check();  cout << '.' << flush;
        result += metric_check();  cout << '.' << flush;
@@ -394,12 +404,10 @@ unsigned exam_indexed()
        result += spinor_check(); cout << '.' << flush;
        result += dummy_check(); cout << '.' << flush;
        
-       if (!result) {
-               cout << " passed " << endl;
-               clog << "(no output)" << endl;
-       } else {
-               cout << " failed " << endl;
-       }
-       
        return result;
 }
+
+int main(int argc, char** argv)
+{
+       return exam_indexed();
+}