Appendix 1 C++ Keywords

The following keywords should not be used for anything other than their predefined purposes in the C++ language. In particular, do not use them for variable names or for programmer-defined functions. In addition to the following keywords listed, identifiers containing a double underscore (__) are reserved for use by C++ implementations and standard libraries and should not be used in your programs.

• alignas

• alignof

• asm

• auto

• bool

• break

• case

• catch

• char

• class

• const

• const_cast

• constexpr

• continue

• decltype

• default

• delete

• do

• double

• dynamic_cast

• else

• enum

• explicit

• export

• extern

• false

• float

• for

• friend

• goto

• if

• inline

• int

• log

• long

• mutable

• namespace

• new

• noexcept

• nullptr

• operator

• private

• protected

• public

• register

• reinterpret_cast

• return

• short

• signed

• sizeof

• static

• static_assert

• static_cast

• struct

• switch

• template

• this

• thread_local

• throw

• true

• try

• typedef

• typeid

• typename

• union

• unsigned

• using

• virtual

• void

• volatile

• wchar_t

• while

These alternative representations for operators and punctuation are reserved and also should not be used otherwise.

• and &&

• not_eq !=

• and_eq &=

• or ||

• bitand &

• or_eq |=

• bitor |

• xor ^

• compl ~

• xor_eq ^=

• not !