The following EBNF rules describe the syntax of binary liter

The following EBNF rules describe the syntax of binary literals in Java. Write a single Perl pattern that matches these constants. Simplify your pattern as much as possible, using only the Perl features discussed in class. BinaryNumeral: 0 b BinaryDigits 0 b BinaryDigits BinaryDigits: Binary Digit BinaryDigit BinaryDigitsAndUnderscoresopi BinaryDigit BinaryDigit: one of 0 1 Binary DigitsAndUnderscores: Binary DigitOrUnderscore BinaryDigitsAndUnderscores BinaryDigitOrUnderscore

Solution

public static void main(string,[]args)

public method(int a, int b)

<&various code&>

codeblock = \"<&\" {ANY} \"&>\"

nonZeroDigit = \"123456789\".

digit = \'0\' + nonZeroDigit .

letter = \'A\' .. \'Z\' + \'a\' .. \'z\' + \'_\' + \'$\'.

TOKENS

ident = letter { letter | digit }.

PRODUCTIONS JavaLike = {ClassDeclaration}.

ClassDeclaration =\"class\" ident [\"extends\" ident] \"{\" {VarDeclaration} {MethodDeclaration }\"}\"

. MethodDeclaration =\"public\" Type ident \"(\"ParamList\")\"

. Codeblock = \"<&\" {ANY} \"&>\".

if (Peek() == CODE_START)

{

while (NextToken() != CODE_END

{

}

}