OpenEuphoria

Re: Allegro Wrapper?

• Posted by petelomax Sep 21, 2022
• 993 views

Indeed, having a visual display of the parse tree proved very helpful when writing the transpiler, and to a lesser/shorter term extent the token list.
It was not particularly difficult either, while this is phix and in fact p2js-specific, the main bit of code ended up being just

 
            elsif what="PARSETREE" then 
                sequence tree_nodes = treeify(ast) 
                if tree_dlg=NULL then 
                    tree = IupTreeView(tree_nodes) 
                    IupSetCallback(tree, "SELECTION_CB", Icallback("selection_cb")) 
                    tree_dlg = IupDialog(tree) 
                    IupSetAttributeHandle(tree_dlg,"PARENTDIALOG",main_dlg) 
                    IupSetAttribute(tree_dlg,"TITLE","Parse Tree") 
                    IupSetAttribute(tree_dlg,"RASTERSIZE","660x830") 
                    IupSetCallback(tree_dlg, "CLOSE_CB", Icallback("close_sub_cb")) 
                else 
                    IupTreeAddNodes(tree,tree_nodes) 
                end if 
                IupConfigDialogShow(config, tree_dlg, "ParseTree") 
 

The treeify() function is a fairly trivial (and very p2js-specific) munging into a more consistent structure, and
IupTreeView()/IupTreeAddNodes() were specially written for phix, but probably quite nickable.

From further back in time, ildump.txt and list.asm contain the intermediate code and symbol table respectively,
and it probably would be nicer if they could be displayed/filtered on-screen, rather than being flat text files.