Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions

Question

Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code:
P → D* E*
D → int ID {record that ID.lexeme is of type int}
D → bool ID {record that ID.lexeme is of type bool}
E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int}
E → !E1 {check that E1.type = bool; set E.type := bool}
E → ID {set E.type := int}
With respect to the above grammar, which one of the following choices is correct?

Accepted Answer

B. The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.

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