A punctuator is a token that has syntactic and semantic meaning to the compiler, but the exact significance depends on the context. A punctuator can also be a token that is used in the syntax of the preprocessor.
C99 and C++ define the following tokens as punctuators, operators, or preprocessing tokens:
| [ ] | ( ) | { } | , | : | ; |
| * | = | ... | # | ||
| . | -> | ++ | -- | ## | |
| & | + | - | ~ | ! | |
| / | % | << | >> | != | |
| < | > | <= | >= | == | |
| ^ | | | && | || | ? | |
| *= | /= | %= | += | -= | |
| <<= | >>= | &= | ^= | |= |
In addition to the C99 preprocessing tokens, operators, and punctuators, C++ allows the following tokens as punctuators:
| :: | .* | ->* | new | delete | |
| and | and_eq | bitand | bitor | comp | |
| not | not_eq | or | or_eq | xor | xor_eq |
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