Peanut is a header-only matrix library using C 20 without any external dependencies, (except unit test), following a expression templates concept. It first constructs matrix expression as a user provides, and evaluates it using an automatically generated code in a compile-time.
Matrix<int, 4, 4> mat1{1,2,3,4,
1,2,3,4,
1,2,3,4,
1,2,3,4};
Matrix<int, 3, 5> mat2{1,2,3,4,5,
1,2,3,4,5,
1,2,3,4,5};
// Peanut first build expression tree,
// `result` type is `MatrixMult<MatrixSubtract<MatrixSum<Matrix<int, 4, 4>, MatrixInverse<Matrix<int, 4, 4>>>, MatrixMinor<Matrix<int, 4, 4>>>, MatrixSub<2, 1, MatrixMult<MatrixTranspose<Matrix<int, 3, 5>>, Matrix<int, 3, 5>>>>`.
auto result = (mat1 Inverse(mat1) - Minor(mat1)) * SubMat<2, 1>(T(mat2) * mat2);
// then evaluate it when `eval()` is called or assigned to `Matrix` type variable.
/* Matrix<int, 4, 4> */ auto e1 = result.eval();
Matrix<int, 4, 4> e2 = result;
- Arbitrary size matrix expression
- Lazy evaluation
- Unit test
Copy Peanut directory to your project, and add and its path to the include path. If you're using CMake, add :
add_subdirectory(ext/peanut)
include_directories(ext/peanut/include)
Then include as below :
#include <Peanut/Peanut.h>
Refer documentation for more information.