Re: [boost] Small matrix/vector library (ET, swizzling, SSE)

From: Maik Beckmann (maikbeckmann_at_[hidden])
Date: 2006-12-05 04:28:33

Am Sonntag, den 03.12.2006, 13:15 +0100 schrieb Daniel Wesslén:

> 
> This should do it:
> 
> #include <math/matrix.tpp>
> using namespace math;
> 
> int main() {
> 
> const indexer<bits::index_swizzle<0,0,2,0> > xxzx;
> const indexer<bits::index_swizzle<3,2,1,0> > wzyx;
> 
> vector<4> v1, v2(1,2,3,4);
> 
> v1 = v2[xxzx]; // v1 = (1,1,3,1)
> // v1[xxzx] = v2; // error - v1[xxzx] is not a lvalue due to aliasing
> v1[wzyx] = v2; // v1 = (4,3,2,1)
> 
> }
> 

I'm sorry if it was mentioned before, but
g++ 3.4.6/ 4.1.1/ 4.2.0-alpha20061031 don't compile this

<at math2-matrix-vector/src>
g++-4.1.1 test.cc -I../include 
</at math2-matrix-vector/src>

<error message>
../include/math/bits/basic_matrix.h: In member function 'Type
math::bits::basic_matrix<Rows, Cols, Type>::element() const':
../include/math/bits/basic_matrix.h:27: error: there are no arguments to
'data' that depend on a template parameter, so a declaration of 'data'
must be available
../include/math/bits/basic_matrix.h:27: error: (if you use
'-fpermissive', G++ will accept your code, but allowing the use of an
undeclared name is deprecated)
../include/math/bits/basic_matrix.h: In member function 'Type&
math::bits::basic_matrix<Rows, Cols, Type>::element()':
../include/math/bits/basic_matrix.h:31: error: there are no arguments to
'data' that depend on a template parameter, so a declaration of 'data'
must be available
../include/math/bits/tmatrix.h: In constructor 'math::tmatrix_dim<Rows,
Cols, Base, Type>::tmatrix_dim(typename math::bits::if_bool_type<((Rows
== 1) && (Cols == 1)), const Type&, math::tmatrix_dim<Rows, Cols, Base,
Type>::dummy>::type)':
../include/math/bits/tmatrix.h:38: error: 'element' was not declared in
this scope
../include/math/bits/tmatrix.h:38: error: expected primary-expression
before ')' token
../include/math/bits/tmatrix.h: In member function
'math::tmatrix_dim<Rows, Cols, Base, Type>::operator typename
math::bits::if_bool_type<((Rows == 1) && (Cols == 1)), Type&,
math::tmatrix_dim<Rows, Cols, Base, Type>::dummy>::type()':
../include/math/bits/tmatrix.h:74: error: 'element' was not declared in
this scope
../include/math/bits/tmatrix.h:74: error: expected primary-expression
before ')' token
../include/math/constants.h: At global scope:
../include/math/constants.h:13: error: uninitialized const
'math::identity'
../include/math/constants.h:16: error: uninitialized const 'math::zero'
</error message>

Regards, 
Maik