MINERVA text processing and blackboards used for program conversion; here to convert a MINERVA source program from old (until MINERVA 1.2) to new (from MINERVA 1.3) gui predicates.

The converter convgui.min is 50 lines, driven by the specification given in oldgui.min.

The example is configured as standalone application. Invoke e.g. on Unix with

	Go.sh myguiprogram.min

The conversion is implemented with string replacement using substitute_all/4 for all lines of the source file and for all conversions defined in "oldgui.min".

From the manual:

	substitute_all(+regexp, +string, +substitution, -result)
        	In "string" replaces all substrings defined by "regexp"
        	with "substitution". The modified string is returned
        	in "result".

The program first reads oldgui.min

	applet__get_code_base(A,B) :-
		applet_getCodeBase(A,B).
	applet__get_document_base(A,B) :-
		applet_getDocumentBase(A,B).
		:

	applet__get_code_base --> applet_getCodeBase
	applet__get_document_base --> applet_getDocumentBase
		:

finally applies this procedure to all lines of the source program.

scroll to top