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Annotation of 43BSD/contrib/icon/book/19/fix.icn, revision 1.1.1.1

1.1       root        1: procedure main()
                      2:    while write(fix(read()))
                      3: end
                      4: 
                      5: procedure fix(exp)
                      6:    while exp ?:= 2(="(",tab(bal(')')),pos(-1))
                      7:    return lassoc(exp,'+-' | '*/') | rassoc(exp,'^') | exp
                      8: end
                      9: 
                     10: procedure lassoc(exp,op)
                     11:    local j
                     12:    return exp ? {
                     13:       every j := bal(op)
                     14:       form(tab(\j),move(1),tab(0))
                     15:       }
                     16: end
                     17: 
                     18: procedure rassoc(exp,op)
                     19:    return exp ? form(tab(bal(op)),move(1),tab(0))
                     20: end
                     21: 
                     22: procedure form(arg1,op,arg2)
                     23:    return op || "(" || fix(arg1) || "," || fix(arg2) || ")"
                     24: end

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