[expr.ref]/1 reads:
A postfix expression followed by a dot . or an arrow ->, optionally followed by the keyword template, and then followed by an id-expression or a splice-expression, is a postfix expression.
This is what the index entry for "class member access expression" points to, but this sentence doesn't make any statements about class member access expressions. Instead, it is unhelpfully stating that a postfix expression of a certain form is a postfix expression, reiterating what is already expressed by the grammar of postfix-expression.
[expr.ref]/1 reads:
This is what the index entry for "class member access expression" points to, but this sentence doesn't make any statements about class member access expressions. Instead, it is unhelpfully stating that a postfix expression of a certain form is a postfix expression, reiterating what is already expressed by the grammar of postfix-expression.