11.3.3 Packages

A project file may contain packages. The name of a package must be one of the identifiers from the following list. A package with a given name may only appear once in a project file. Package names are case insensitive. The following package names are legal:

• Naming
• Builder
• Compiler
• Binder
• Linker
• Finder
• Cross_Reference
• Check
• Eliminate
• Pretty_Printer
• Metrics
• gnatls
• gnatstub
• IDE
• Language_Processing

In its simplest form, a package may be empty:

     project Simple is
       package Builder is
       end Builder;
     end Simple;

A package may contain attribute declarations, variable declarations and case constructions, as will be described below.

When there is ambiguity between a project name and a package name, the name always designates the project. To avoid possible confusion, it is always a good idea to avoid naming a project with one of the names allowed for packages or any name that starts with gnat.