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Introduce a variable_or_fixed<N> proxy returned by fix<N>(val) to pass both a compile-time and runtime fallback value in case N means "runtime".

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This mechanism is used by the seq/seqN functions. The proxy object is immediately converted to pure compile-time (as fix<N>) or pure runtime (i.e., an Index) to avoid redundant template instantiations.
This commit is contained in:
Gael Guennebaud
2017-01-16 16:17:01 +01:00
parent 6e97698161
commit a9232af845
3 changed files with 133 additions and 23 deletions
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31
test/indexed_view.cpp
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@@ -8,7 +8,12 @@
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#ifdef EIGEN_TEST_PART_2
// Make sure we also check c++98 implementation
// Make sure we also check c++11 max implementation
#define EIGEN_MAX_CPP_VER 11
#endif
#ifdef EIGEN_TEST_PART_3
// Make sure we also check c++98 max implementation
#define EIGEN_MAX_CPP_VER 03
#endif
@@ -49,6 +54,13 @@ is_same_type(const T1& a, const T2& b)
return (a == b).all();
}
template<typename T1,typename T2>
typename internal::enable_if<internal::is_same<T1,T2>::value,bool>::type
is_same_seq_type(const T1& a, const T2& b)
{
return a.size() == b.size() && a.first()==b.first() && Index(a.incrObject())==Index(b.incrObject());
}
void check_indexed_view()
{
using Eigen::placeholders::all;
@@ -157,6 +169,23 @@ void check_indexed_view()
VERIFY_IS_EQUAL( (B(seqN(1,2,fix<2>), seq(1,3,fix<3>))).InnerStrideAtCompileTime , 2);
VERIFY_IS_EQUAL( (B(seqN(1,2,fix<2>), seq(1,3,fix<3>))).OuterStrideAtCompileTime , 3*4);
VERIFY_IS_EQUAL( (A(seqN(2,fix<5>), seqN(1,fix<3>))).RowsAtCompileTime, 5);
VERIFY_IS_EQUAL( (A(seqN(2,fix<5>), seqN(1,fix<3>))).ColsAtCompileTime, 3);
VERIFY_IS_EQUAL( (A(seqN(2,fix<5>(5)), seqN(1,fix<3>(3)))).RowsAtCompileTime, 5);
VERIFY_IS_EQUAL( (A(seqN(2,fix<5>(5)), seqN(1,fix<3>(3)))).ColsAtCompileTime, 3);
VERIFY_IS_EQUAL( (A(seqN(2,fix<Dynamic>(5)), seqN(1,fix<Dynamic>(3)))).RowsAtCompileTime, Dynamic);
VERIFY_IS_EQUAL( (A(seqN(2,fix<Dynamic>(5)), seqN(1,fix<Dynamic>(3)))).ColsAtCompileTime, Dynamic);
VERIFY_IS_EQUAL( (A(seqN(2,fix<Dynamic>(5)), seqN(1,fix<Dynamic>(3)))).rows(), 5);
VERIFY_IS_EQUAL( (A(seqN(2,fix<Dynamic>(5)), seqN(1,fix<Dynamic>(3)))).cols(), 3);
VERIFY( is_same_seq_type( seqN(2,5,fix<-1>), seqN(2,5,fix<-1>(-1)) ) );
VERIFY( is_same_seq_type( seqN(2,5), seqN(2,5,fix<1>(1)) ) );
VERIFY( is_same_seq_type( seqN(2,5,3), seqN(2,5,fix<DynamicIndex>(3)) ) );
VERIFY( is_same_seq_type( seq(2,7,fix<3>), seqN(2,2,fix<3>) ) );
VERIFY( is_same_seq_type( seqN(2,fix<Dynamic>(5),3), seqN(2,5,fix<DynamicIndex>(3)) ) );
VERIFY( is_same_seq_type( seqN(2,fix<5>(5),fix<-2>), seqN(2,fix<5>,fix<-2>()) ) );
VERIFY( (A(seqN(2,fix<5>), 5)).RowsAtCompileTime == 5);
VERIFY( (A(4, all)).ColsAtCompileTime == Dynamic);
VERIFY( (A(4, all)).RowsAtCompileTime == 1);