36 lines
2.3 KiB
Plaintext
36 lines
2.3 KiB
Plaintext
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program := program statement | statement | empty
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statement := { statement } |
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identifier = numexpression; |
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identifier[numexpression] = numexpression; |
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function(expressionlist); |
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for (identifer = numexpression; numexpression; identifier = numexpression) { statement } |
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while (numexpression) { statement } |
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if (numexpresion) { statement } elif |
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break; |
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continue;
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elif := else statement | empty
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function := abs | countbits | exptmod | jacobi | print | isprime | nextprime | issquare | readinteger | exit
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expressionlist := expressionlist, expression | expression
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// LR(1) !!!?
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expression := string | numexpression
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numexpression := cmpexpr && cmpexpr | cmpexpr \|\| cmpexpr | cmpexpr
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cmpexpr := boolexpr < boolexpr | boolexpr > boolexpr | boolexpr == boolexpr |
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boolexpr <= boolexpr | boolexpr >= boolexpr | boolexpr
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boolexpr := shiftexpr & shiftexpr | shiftexpr ^ shiftexpr | shiftexpr \| shiftexpr | shiftexpr
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shiftexpr := addsubexpr << addsubexpr | addsubexpr >> addsubexpr | addsubexpr
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addsubexpr := mulexpr + mulexpr | mulexpr - mulexpr | mulexpr
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mulexpr := expr * expr | expr / expr | expr % expr | expr
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expr := -nexpr | nexpr
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nexpr := integer | identifier | ( numexpression ) | identifier[numexpression]
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identifier := identifer digits | identifier alpha | alpha
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alpha := a ... z | A ... Z
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integer := hexnumber | digits
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hexnumber := 0xhexdigits
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hexdigits := hexdigits hexdigit | hexdigit
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hexdigit := 0 ... 9 | a ... f | A ... F
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digits := digits digit | digit
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digit := 0 ... 9
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