Annex A (informative) Grammar summary [gram]

A.5 Expressions [gram.expr]

simple-capture:
identifier ...
& identifier ...
this
* this
fold-operator: one of
+   -   *   /   %   ^   &   |   <<   >>
+=  -=  *=  /=  %=  ^=  &=  |=  <<=  >>=  =
==  !=  <   >   <=  >=  &&  ||  ,   .*   ->*
unary-operator: one of
* & + - ! ~
delete-expression:
:: delete cast-expression
:: delete [ ] cast-expression
assignment-operator: one of
= *= /= %= += -= >>= <<= &= ^= |=