Progress
Programming
Handbook
Flexibility
Progress is an interpreted language with a run-time compiler to rapidly build and test applications. With the help of the Application Development Environment (ADE), most of which is built using the 4GL, you can compile and run applications on the fly. The compiler generates an efficient run code (r-code) that the Progress run-time interpreter can execute immediately, without additional operating system intervention (no machine language generation or linkage required).
You can also compile and execute 4GL routines directly from within your application. Thus, changes to the code and even the scope of an application can often be made in a matter of minutes. See the "Compile-time Versus Run-time Execution" section in this chapter for information on how to compile and execute 4GL applications. See "R-code Features and Functions." for a description of the structure and utility of Progress r-code.
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