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Allow traceIndex on a different index to distribute replicated across a vector index

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This commit is contained in:
Peter Boyle 2015-06-04 09:41:16 +01:00
parent dd1f5dd966
commit 4a03054ef4
1 changed files with 13 additions and 0 deletions
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13
lib/tensors/Tensor_trace.h
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@ -72,5 +72,18 @@ auto traceIndex(const iMatrix<vtype,N> &arg) -> iMatrix<decltype(traceIndex<Lev
return ret;
}
// Allow to recurse if vector, but never terminate on a vector
// trace of a different index can distribute across the vector index in a replicated way
// but we do not trace a vector index.
template<int Level,class vtype,int N,typename std::enable_if< iVector<vtype>::TensorLevel != Level >::type * =nullptr> inline
auto traceIndex(const iVector<vtype,N> &arg) -> iVector<decltype(traceIndex<Level>(arg._internal[0])),N>
{
iVector<decltype(traceIndex<Level>(arg._internal[0])),N> ret;
for(int i=0;i<N;i++){
ret._internal[i] = traceIndex<Level>(arg._internal[i]);
}
return ret;
}
}
#endif