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ABENVALUE_CONSTRUCTOR_PARAMS_INIT - VALUE CONSTRUCTOR PARAMS INIT

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VALUE, Initial Value for All Types

... VALUE dtype$|#( ) ...

Effect

If no parameters are specified in the parentheses, the return value is set to its type-specific initial value. This is possible for any non-generic data types dtype. The # character can stand for corresponding statically recognizable operand types. When VALUE #( ) is passed to a generically typed formal parameter, the type is also derived from its generic type as follows: This applies in particular to the types c, n, and x with generic lengths.

Notes

• While VALUE with pass by value is used only to construct certain complex values (structures and internal tables), VALUE without pass by value, on the other hand, is a general method for creating type-dependent initial values in any operand positions.

• If dtype or # stand for an enumerated type, its initial value is created according to its base type.

Example

Creation of a suitable initial structure for a non-optional input parameter of a method.

Value Operator, Type Inference

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