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represents the instanceof expression.

#id: id
the unique ID assigned to this fact.

#parent: id
ID of the parent node.

#encl: methodT, constructorT, classInitializerT, fieldT
ID of the fact that represents the enclosing method.

#type: typeInst
the id of the reference to the right operand of this instanceof expression

#expression: expression
left operand of this instanceof expression

if (test instanceof TestChild) return;

ifT(#ifT_ID, #Parent, _, #Condition, #ThenPart, 'null').
typeTestT(#Condition, #ifT_ID, _, #typeref, #expression).
identT(#expression, Condition, _, 'test', _).
returnT(#ThenPart, ID, _, 'null').

ast_node_type_spec(typeTestT,[    
     ast_arg(id,     mult(1,1,no ), id,   [typeTestT]),
     ast_arg(parent, mult(1,1,no ), id,   [id]),
     ast_arg(encl,   mult(1,1,no ), id,   [methodT, constructorT, classInitializerT, fieldT]),
     ast_arg(type,   mult(1,1,no ), id,   [type_inst]),
     ast_arg(expr,   mult(1,1,no ), id,   [expressionType])
]).