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The first and simplest is the compiler level. If a developer needs some information about result of the compilation, he may process the source code as a compiler. It is simple in some languages and difficult in other. In special cases he must find details of the language conventions, compiler characteristics or particular hardware. Of course he may have difficulties, but in common cases such information exist and the sources of it are well known.

For instance a progframmer needs to check the greatest possible value for a numerical variable. He must find its definition and get its type. Then he can read in the documentation of the compiler about limits for variables of this type.

In other cases the search of compiler-level information is is more complex. For us is important that it is allways possible and the results are strict defined.

At least a human can compile the code manually. This is usually not simple, but not more complex than to write a program in assembler. No darkness is present here.