8
Expressions
[expr]
8.2
Postfix expressions
[expr.post]
8.2.6
Increment and decrement
[expr.post.incr]
1
#
The value of a postfix
++
expression is the value of its operand
.
[
Note
:
The value obtained is a copy of the original value
—
end note
]
The operand shall be a modifiable lvalue
.
The type of the operand shall be an arithmetic type other than
cv
bool
, or a pointer to a complete object type
.
The value of the operand object is modified by adding
1
to it
.
The
value computation of the
++
expression is sequenced before the modification of the operand object
.
With respect to an indeterminately-sequenced function call, the operation of postfix
++
is a single evaluation
.
[
Note
:
Therefore, a function call shall not intervene between the lvalue-to-rvalue conversion and the side effect associated with any single postfix ++ operator
.
—
end note
]
The result is a prvalue
.
The type of the result is the cv-unqualified version of the type of the operand
.
If the operand is a bit-field that cannot represent the incremented value, the resulting value of the bit-field is
implementation-defined
.
See also
[expr.add]
and
[expr.ass]
.
2
#
The operand of postfix
--
is decremented analogously to the postfix
++
operator
.
[
Note
:
For prefix increment and decrement, see
[expr.pre.incr]
.
—
end note
]