February 01, 1996
C++: Iterators
February 1996/Standard C/C++: Iterators/Table 5
Table 5: Random-Access Iterator Additional Properties
| Expression |
Result Type |
Meaning |
Notes |
|---|
| a < b |
convertible to bool |
b is reachable from a |
a and b in same domain |
| a > b |
convertible to bool |
b < a |
- |
| a <= b |
convertible to bool |
!(b < a) |
- |
| a >= b |
convertible to bool |
!(a < b) |
- |
| r += n |
X& |
{ Dist m = n;
for (; 0 < m; --m)
++r;
for(; m < 0; ++m)
--r;
return r; } |
- |
a + n
n + a |
- |
{X tmp =a ;
return tmp += n;} |
- |
| r -= n |
X& |
r += -n |
- |
| a - n |
X |
a + -n |
- |
| b -a |
Dist |
{ Dist m = 0;
for (; a < b; ++a)
++m;
for (; b < a; ++b)
--m;
return m; } |
a and b in same domain |
| a[n] |
convertible to T |
*(a + n) |
- |
Notes: X is iterator type, a and b have type X, r and s have
type X&
T is element type
Dist is distance type for X
all other properties same as for bidirectional iterators
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