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Represents an expression in parentheses () in the source code.

#id: id
the unique ID given to this node.

#parent: id
ID if the parent node in the AST.

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

#expr: expression
ID of the expression within the parenthesis.

...
int i = (4 + 8) * 2;    // (4 + 8) is our precedenceT
...

localT(#Local, #Parent, #Enclosing, type(basic, int, 0), 'i', #OuterOperation)
 operationT(#OuterOperation, #Local, #Enclosing, [#Precedence, #Literal_15], *, 0),
   precedenceT(#Precedence, #OuterOperation, #Enclosing, #InnerOperation),
     operationT(#InnerOperation, #Precedence, #Enclosing, [#Literal_4, #Literal_8], +, 0),
     literalT(#Literal_4, #InnerOperation, #Enclosing, type(basic, int, 0), '4'),
     literalT(#Literal_8, #InnerOperation, #Enclosing, type(basic, int, 0), '8'),
   literalT(#Literal_15, #OuterOperation, #Enclosing, type(basic, int, 0), '15'),

ast_node_def('Java',precedenceT,[
     ast_arg(id,     mult(1,1,no ), id,  [precedenceT]), % <-- convention!!!
     ast_arg(parent, mult(1,1,no ), id,  [id]), % <-- convention!!!
     ast_arg(encl,   mult(1,1,no ), id,  [methodT, constructorT, classInitializerT, fieldT]),
     ast_arg(expr,   mult(1,1,no ), id,  [expressionType])
]).