1 program := program statement | statement | empty 2 statement := { statement } | 3 identifier = numexpression; | 4 identifier[numexpression] = numexpression; | 5 function(expressionlist); | 6 for (identifer = numexpression; numexpression; identifier = numexpression) { statement } | 7 while (numexpression) { statement } | 8 if (numexpresion) { statement } elif | 9 break; | 10 continue; 11 12 elif := else statement | empty 13 function := abs | countbits | exptmod | jacobi | print | isprime | nextprime | issquare | readinteger | exit 14 expressionlist := expressionlist, expression | expression 15 16 // LR(1) !!!? 17 expression := string | numexpression 18 numexpression := cmpexpr && cmpexpr | cmpexpr \|\| cmpexpr | cmpexpr 19 cmpexpr := boolexpr < boolexpr | boolexpr > boolexpr | boolexpr == boolexpr | 20 boolexpr <= boolexpr | boolexpr >= boolexpr | boolexpr 21 boolexpr := shiftexpr & shiftexpr | shiftexpr ^ shiftexpr | shiftexpr \| shiftexpr | shiftexpr 22 shiftexpr := addsubexpr << addsubexpr | addsubexpr >> addsubexpr | addsubexpr 23 addsubexpr := mulexpr + mulexpr | mulexpr - mulexpr | mulexpr 24 mulexpr := expr * expr | expr / expr | expr % expr | expr 25 expr := -nexpr | nexpr 26 nexpr := integer | identifier | ( numexpression ) | identifier[numexpression] 27 28 identifier := identifer digits | identifier alpha | alpha 29 alpha := a ... z | A ... Z 30 integer := hexnumber | digits 31 hexnumber := 0xhexdigits 32 hexdigits := hexdigits hexdigit | hexdigit 33 hexdigit := 0 ... 9 | a ... f | A ... F 34 digits := digits digit | digit 35 digit := 0 ... 9 36
