When introducing a custom scalar type "number" via extension of the typetraits

namespace Eigen
{
template<> struct NumTraits<number>
{
enum
{
IsComplex = 0,
IsInteger = 0,
ReadCost = 1,
AddCost = 1,
MulCost = 1,
IsSigned = 1,
RequireInitialization = 1 // not sure - this indicates that the constructor has to be called
};

typedef number Real;
typedef number NonInteger;
typedef number Nested;

static inline Real epsilon() { return Real(0); }
static inline Real dummy_precision()
{
// make sure to override this for floating-point types
return Real(0);
}
//static inline number highest() { return number::maxVal(); }
//static inline number lowest() { return number::minVal(); }


};
}

it turns out, that the triangularView does not work properly. During compilation I get:

error: expected expression
Matrix5x3 u = lu.matrixLU().triangularView<Eigen::Upper>();
^
Note: This is part of the example for full pivor LU decomposition. The only thing changed is the scalar type, which is set to the custom type. Did I forget something in the customization of the scalar types, which causes this error?

Best regards,
Stefan

please, paste the complete error message.

This is the complete error message, I do not get more:

[...]/Polytopes/HPolytope/HPolytope.tpp:136:66: error: expected expression
Matrix5x3 u = lu.matrixLU().triangularView<Eigen::Upper>();
.....................................................................................................^
1 error generated.
make[3]: *** [examples/CMakeFiles/example_vertexEnumeration.dir/example_vertexEnumeration.cpp.o] Error 1

When replacing my custom type with a double, the error does not occur. Thought I missed something in the Typetraits Definition.

hm, you might have a non ascii character hidden somewhere in the source code.