_DEFINE_EXPR_RELATIONAL_OPERATOR
_DEFINE_EXPR_RELATIONAL_OPERATOR(&&, logical_and)
_DEFINE_EXPR_RELATIONAL_OPERATOR(||, logical_or)
_DEFINE_EXPR_RELATIONAL_OPERATOR(==, equal_to)
_DEFINE_EXPR_RELATIONAL_OPERATOR(!=, not_equal_to)
_DEFINE_EXPR_RELATIONAL_OPERATOR(<, less)
_DEFINE_EXPR_RELATIONAL_OPERATOR(>, greater)
_DEFINE_EXPR_RELATIONAL_OPERATOR(<=, less_equal)
_DEFINE_EXPR_RELATIONAL_OPERATOR(>=, greater_equal)
#undef _DEFINE_EXPR_RELATIONAL_OPERATOR