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11.10 Variables from Imported Projects

An attribute or variable defined in an imported or parent project can be used in expressions in the importing / extending project. Such an attribute or variable is denoted by an expanded name whose prefix is either the name of the project or the expanded name of a package within a project.

       with "imported";
       project Main extends "base" is
          Var1 := Imported.Var;
          Var2 := Base.Var & ".new";
          package Builder is
             for Default_Switches ("Ada")
                 use Imported.Builder.Ada_Switches &
                     "-gnatg" &
          end Builder;
          package Compiler is
             for Default_Switches ("Ada")
                 use Base.Compiler.Ada_Switches;
          end Compiler;
       end Main;

In this example: