14.5.3 Parenthesized expressions

A parenthesized-expression consists of an expression enclosed in parentheses.
parenthesized-expression:
( expression )
A parenthesized-expression is evaluated by evaluating the expression within
the parentheses. If the
expression within the parentheses denotes a namespace, type, or method
group, a compile-time error occurs.
Otherwise, the result of the parenthesized-expression is the result of the
evaluation of the contained
expression.