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8.5.1 Object Renaming Declarations

(1)

An object_renaming_declaration is used to rename an object.

Syntax

(2)
       object_renaming_declaration ::= defining_identifier : subtype_mark renames object_name;

Name Resolution Rules

(3)

The type of the object_name shall resolve to the type determined by the subtype_mark.

Legality Rules

(4)

The renamed entity shall be an object.

(5)

The renamed entity shall not be a subcomponent that depends on discriminants of a variable whose nominal subtype is unconstrained, unless this subtype is indefinite, or the variable is aliased. A slice of an array shall not be renamed if this restriction disallows renaming of the array.

Static Semantics

(6)

An object_renaming_declaration declares a new view of the renamed object whose properties are identical to those of the renamed view. Thus, the properties of the renamed object are not affected by the renaming_declaration. In particular, its value and whether or not it is a constant are unaffected; similarly, the constraints that apply to an object are not affected by renaming (any constraint implied by the subtype_mark of the object_renaming_declaration is ignored).

Examples

(7)

Example of renaming an object:

(8)
       declare
          L : Person renames Leftmost_Person; -- see 3.10.1
       begin
          L.Age := L.Age + 1;
       end;

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