Keyword: USE

The use statement identifies items in other design units so those items can be referenced.

A use clause includes—in this order—the reserved word "use", followed by a list of design units (or design unit items) to be referenced.

A use clause makes the referenced design units visible to the working environment.  If a design unit (or design unit item) belongs to a library different from the current library, a library statement must be included before the use statement. The library statement must specify the library holding the referenced design unit.

Examples

    use mylib.mypackage.dff;

    ...

    use mylib.mypackage.all;

    ...

    use mylib.all;

    ...

    use work.all;

All design units automatically include the following two implicit clauses:

    library STD, WORK;

    use STD.STANDARD.all;

LRM

    10.4

See also

  Library

  Design Libraries