string_length_kind

How the length of a string is determined.

Declaration

Syntax

string_length_kind
    = AssumedLength
    | DeferredLength
    | ExpressionLength
    | ImplicitLength

Values

Value	Meaning
AssumedLength	character(len=*): a dummy argument takes the length of the actual argument.
DeferredLength	character(len=:): the length is fixed when the object is allocated or assigned.
ExpressionLength	the length is the expression in the len member, which may be a constant or computed at run time.
ImplicitLength	the length follows from the operation that produced the value rather than from a declaration. It is what the result of a StringPhysicalCast must use.

Return values

None. An enumeration value is not evaluated.

Description

len and len_kind go together: ExpressionLength requires a len, and the other three leave it nil.

The string_length_arguments pass turns an AssumedLength dummy of a procedure without BIND(C) into an ExpressionLength one whose len is the hidden length argument the actual’s length is passed in (see Function).

See Also

String, StringPhysicalCast, StringLen