🚀 go-pugleaf

Now what do I do about statements like

  a := b
       + c ?

I gotta backtrack over the statement I thought was complete. 
And how do I express this mathematically? 

When you write prose (flames, etc.) you use punctuation to
show where one thought ends and another one begins, or to
set off collections of words to make the sentence less
ambiguous. Since programming is (weakly) linked to expressing
thought, it shouldn't be too much to ask for you to let
the compiler know when a statement is completed, and for you to
explicitly mark your blocks. As a side-effect, humans who
read your code have a fighting chance of figuring out what
you meant. 

Try finding out (without using a ruler or other aid) to which
block the last statement belongs:

-- apologize for all the lines, but it has to go off your screen to be effective
SEQ
  x := 1
  SEQ
    x := x + y
    PAR
      y := y - 1
      x := x - 1
      SEQ
	-- and all kinds of stuff 
	--
	--
	--
	--
	--
	--
	SEQ
	  --
	  --
	  --
	  --
	  SEQ
	    --
	    --
	    --
	    --
	    SEQ
	      ALT
		--
		  --
		  --
		  --
		  --
                --
		  SEQ
		    --
		    --
		    --
		    --
		    SEQ
		      --
		      --
		      --
		      --
		      --
		      --
		      --
		      --
		      --
		      PAR
			--
			--
			--
			--
			--
      -- Which one?

Debbie Weber-Wulff
weberwu@fubinf.uucp