FORTRAN, Data, Derived Types
*Conan The Librarian
Like intrinsic data types, a Fortran 95/90 derived data type has a name, a set of associated values, a way to denote the values, and operations to manipulate and interpret these values. The names of the intrinsic data types are predefined, while the names of derived types are defined in derived-type definitions. A derived-type definition specifies the name of the type and the types of its components. A derived type can be resolved into "ultimate" components that are either of intrinsic type or are pointers. The set of values for a specific derived type consists of all possible sequences of component values permitted by the definition of that derived type. Structure constructors are used to specify values of derived types. Nonintrinsic assignment for derived-type entities must be defined by a subroutine with an ASSIGNMENT interface. Any operation on derived-type entities must be defined by a function with an OPERATOR interface. Arguments and function values can be of any intrinsic or derived type.
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