Hi there, again.

I have a little question on template magic.

Namely, I want to subclass Matrix

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class MathArrayBase : public Eigen::Matrix


Within my class I call the method

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typedef double TScalar;
typedef Matrix Base;
MathArrayBase MathArrayBase::operatorBase::cwise() () );
}


I need the call of 'cast' because cwise()
MathArrayBase MathArrayBase::operator( (this->Base::cwise() () );
}
[/code]

The problem: The compiler complains at 'cast()' saying

error: expected primary-expression before ‘(’ token
error: expected primary-expression before ‘>’ token
error: expected primary-expression before ‘)’

I am not that confident with templates to resolve this...

When I remove and write XXX.cast() the template compiles fine, but it complains again at the same line when I write

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template classMathArrayBase;


which is natural.

I think this is not really Eigen2-related, but hopefully someone went into the same problem and might offer some solution? Thanks!

this is a really nasty aspect of c++ that we learnt while coding eigen2.

the problem is that you need to add a "template" keyword before the cast call, like this:

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matrix.template cast()


bjacob wrote:this is a really nasty aspect of c++ that we learnt while coding eigen2.

the problem is that you need to add a "template" keyword before the cast call, like this:

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matrix.template cast()


Wow! So obvious. Thanks!