Primary expressions include the simplest forms of expressions. primary-expression : array-creation-expressionprimary-no-array-creation-expressionprimary-no-array-creation-expression : literalsimple-nameparenthesized-expressionmember-accessinvocation-expressionelement-accessthis-accessbase-accesspost-increment-expressionpost-decrement-expressionobject-creation-expressiondelegate-creation-expressiontypeof-expressionsizeof-expressionchecked-expressionunchecked-expression Primary expressions are divided between array-creation-expressions and primary-no-array-creation-expressions. Treating array-creation-expression in this way, rather than listing it along with the other simple expression forms, enables the grammar to disallow potentially confusing code such as which would otherwise be interpreted as