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bug #1281: fix AutoDiffScalar's make_coherent for nested expression of constant ADs.

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This commit is contained in:
Gael Guennebaud
2019-11-14 14:58:08 +01:00
parent 0fb6e24408
commit b9837ca9ae
2 changed files with 43 additions and 1 deletions
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16
unsupported/test/autodiff.cpp
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@@ -352,6 +352,21 @@ double bug_1264() {
return v2(0).value();
}
// check with expressions on constants
double bug_1281() {
int n = 2;
typedef AutoDiffScalar<VectorXd> AD;
const AD c = 1.;
AD x0(2,n,0);
AD y1 = (AD(c)+AD(c))*x0;
y1 = x0 * (AD(c)+AD(c));
AD y2 = (-AD(c))+x0;
y2 = x0+(-AD(c));
AD y3 = (AD(c)*(-AD(c))+AD(c))*x0;
y3 = x0 * (AD(c)*(-AD(c))+AD(c));
return (y1+y2+y3).value();
}
#endif
EIGEN_DECLARE_TEST(autodiff)
@@ -367,5 +382,6 @@ EIGEN_DECLARE_TEST(autodiff)
CALL_SUBTEST_5( bug_1223() );
CALL_SUBTEST_5( bug_1260() );
CALL_SUBTEST_5( bug_1261() );
CALL_SUBTEST_5( bug_1281() );
}