Application entry point

This RFC describes the entry point of application-style projects. Note, that the specification leaves out some details that will be filled in by other RFCs.

The entry point has to be a free-function named main (case-sensitive). The allowed parameterization/return types:

• func main(): unit
• func main(): int32, where the returned value is the exit code of the application
• func main(args: Array<string>): unit, where args are the CLI arguments passed to the application
• func main(args: Array<string>): int32, where the returned value is the exit code of the application and where args are the CLI arguments passed to the application

The visibility of the main function doesn't matter.

The entry point must be placed in a file main.draco in the root module of a package.

The rationale behind this is to introduce a convention to easily navigate to the true entry point of the application. Many C# projects already used Program.cs for this as a soft convention.