MenhirLib.EngineTypestype ('state, 'semantic_value) stack = {state : 'state; | 
semv : 'semantic_value; | 
startp : Lexing.position; | 
endp : Lexing.position; | 
next : ('state, 'semantic_value) stack; | 
}type ('state, 'semantic_value, 'token) env = {error : bool; | 
triple : 'token * Lexing.position * Lexing.position; | 
stack : ('state, 'semantic_value) stack; | 
current : 'state; | 
}module type TABLE = sig ... endmodule type MONOLITHIC_ENGINE = sig ... endmodule type INCREMENTAL_ENGINE_START = sig ... endmodule type ENGINE = sig ... end