A lazy range of integers that mimics a Python range.
It stores the first value, the last value (excluded) and the step size between two indices. By default, the step size is set to 1.
This function returns an iterable lazy object, which can be used in range-based for loops:
for (
auto i :
range(5)) {
std::cout << i << " ";
}
std::cout << "\n";
for (
auto i :
range(-2, 1)) {
std::cout << i << " ";
}
std::cout << "\n";
for (
auto i :
range(10, 3, -2)) {
std::cout << i << " ";
}
std::cout << "\n";
for (
auto i :
range(0, 10, -1)) {
std::cout << i << " ";
}
Output:
0 1 2 3 4
-2 -1 0
10 8 6 4
See also std::ranges::views::iota.
Definition at line 80 of file range.hpp.
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| | range ()=default |
| | Default constructor.
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| |
| | range (long first, long last) noexcept |
| | Construct a range with a step size of 1 and a given first and last (excluded) value.
|
| |
| | range (long first, long last, long step) |
| | Construct a range with a given step size and a given first and last (excluded) value.
|
| |
| | range (long last) |
| | Construct a range with a step size of 1, a first value set to 0 and a given last value (excluded).
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| |
|
const_iterator | begin () const noexcept |
| | The same as cbegin().
|
| |
| const_iterator | cbegin () const noexcept |
| | Beginning of the integer range.
|
| |
| const_iterator | cend () const noexcept |
| | End of the range.
|
| |
|
const_iterator | end () const noexcept |
| | The same as cend().
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| |
|
long | first () const |
| | Get first value of the range.
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| |
|
long | last () const |
| | Get last value of the range (excluded).
|
| |
| range | operator+ (long shift) const |
| | Shift the whole range by a given amount.
|
| |
|
bool | operator== (range const &) const =default |
| | Default equal-to operator.
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| |
|
long | size () const |
| | Get number of elements in the range.
|
| |
|
long | step () const |
| | Get step size between two elements of the range.
|
| |
1.12.0