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37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
#ifndef GRID_MATH_TRACE_H
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#define GRID_MATH_TRACE_H
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namespace Grid {
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//////////////////////////////////////////////////////////////////
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// Traces: both all indices and a specific index. Indices must be
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// either scalar or matrix
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/////////////////////////////////////////////////////////////////
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inline ComplexF trace( const ComplexF &arg){ return arg;}
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inline ComplexD trace( const ComplexD &arg){ return arg;}
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inline RealF trace( const RealF &arg){ return arg;}
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inline RealD trace( const RealD &arg){ return arg;}
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template<class vtype,int N>
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inline auto trace(const iMatrix<vtype,N> &arg) -> iScalar<decltype(trace(arg._internal[0][0]))>
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{
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iScalar<decltype( trace(arg._internal[0][0] )) > ret;
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zeroit(ret._internal);
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for(int i=0;i<N;i++){
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ret._internal=ret._internal+trace(arg._internal[i][i]);
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}
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return ret;
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}
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template<class vtype>
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inline auto trace(const iScalar<vtype> &arg) -> iScalar<decltype(trace(arg._internal))>
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{
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iScalar<decltype(trace(arg._internal))> ret;
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ret._internal=trace(arg._internal);
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return ret;
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}
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}
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#endif
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