2023 Write a set of BNF grammar rules that will parse a programming | Assignment Collections

Computer Science 2023 Reserved_3

2023 Write a set of BNF grammar rules that will parse a programming | Assignment Collections

Write a set of BNF grammar rules that will parse a programming language that can have variable type declarations such where the variable has name and a type which can be either integer or boolean, and optionally has a constant default value:

E.g.

var i : integer;

var j : integer = 6;

var b : boolean;

var b2 : boolean = true;

var b3 : boolean = false;

 

2.

Show an example of why the following grammar is Ambiguous.

<program>           -> <stmts>

<stmts>               -> <stmts> ; <stmts> | <assignment>

<assignment>       -> <var> = <expr>

<var>                   -> a | b | c | d

<expr>                 -> <term> + <term> | <term> – <term>

<term>                 -> <var> | const

 

 

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