Fortran Seg Fault when assigning Matrices
matrix,segmentation-fault,fortran,derived-types
After narrowing down the issue to using numbers vs. variables of those same numbers, it was discovered that Fortran doesn't like assigning a matrix to a matrix of different dimensions even if it fit inside. This was weird because smaller values of M, N, and Nblock got around the issue...
Fortran derived data type two dimensional array storage
fortran,fortran90,derived-types
The array of derived type is stored in the same column-major order. You may wonder where are the individual components stored. Their offset from the address of the array element is unspecified, the order can differ from the order of declaration and there may be various gaps between them. But...
implementing abstract class using derived types
c#,interface,polymorphism,derived-types
Move the type parameter to the class level and add a constraint: public abstract class BaseDTO<T> where T : BaseEntity { protected abstract void ConvertFromEntity(T entity); public abstract T ConvertToEntity(); } public class DTODocNum : BaseDTO<DocNum> { ... } ...
Handle on array derived type
What you try is not possible if your component is allocatable. The reference (6.1.2) is actually a reference to the official standard documents, which prohibits this. The reason is simple, the allocatable components (scalar or arrays) are stored in a different part of memory than the derived type itself. Therefore...
Filling Multidimensional Arrays
If your concern is about the duplication of arrays such as in m%ma = [...] ! Humongous array then Fortran 2003 offers the move_alloc intrinsic which moves the allocation (including the values) from one variable to another. Subroutine set (m, u, v, w) Class (Multia), Intent (InOut) :: m Real,...
Error in Derived type declaration: Variable at (1) in this context must be constant
fortran,fortran90,derived-types
Yes. Declaring an explicit-shape array in a non-parameterized derived type requires a constant expression. You could either make k allocatable,dimension(:,:) (and (de-)allocation), or make nrx and maxprx global/module constants (or replace them right away). If your compiler supports it, you can use parameterized derived types: type :: PRM(nrx,maxprx) ! parameterized...
Using reflection with derived objects
c#,reflection,nested,propertyinfo,derived-types
I am not sure what you are trying to accomplish and if it is the best way to do it. But I have changed the code so it works. I have not made it as dynamic as it can be... public class Base { public Prop prop { get; set;...
Using move_alloc in a derived type
As the error message says, the arguments to move_alloc must be allocatable. That's both of them. from is the first, and this must be allocatable for the allocation to move from it. You have Subroutine space_mvalloc (t, b) Class (SField), Intent (InOut) :: t Real, Intent (InOut) :: b(:,:,:) Call...
Fortran derived types containing pointers to be accessible from C
c,pointers,fortran,fortran-iso-c-binding,derived-types
You can write some interoperable accessor procedures in Fortran that operate on the derived type and expose the necessary variables to the C++ code. This is very similar to how general C++ code interacts with private member variables of a class. You can use the C address of an object...