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I am currently working on a problem that is asking me to write the grammar productions for the try-catch-finally and throw C# statements. It states that "you can assume that there are nonterminals "Type", "Expression", and "Statement", as well as a terminal "Ident". I do not understand how this is possible using so few nonterminals and only one terminal

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You need more terminals, for the reserved words try, catch, finally, and throw, and possibly for braces and for semicolon (depending on the interpretation of Statement).

Here is an example to help you get started. It gives the syntax of a simple if statement, assuming that Statement also includes compound statements (i.e. { ... }), and that statements do not end in a semicolon.

IfStatement → if ( Expression ) Statement

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