deduction guides for std::ranges::iota_view
From cppreference.com
Defined in header <ranges>
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template< class W, class Bound > requires (!/*is-integer-like*/<W> || |
(since C++20) | |
This deduction guide is provided for iota_view
to allow deduction from an initial value and a bounding value.
For the definitions of /*is-integer-like*/ and /*is-signed-integer-like*/, see is-integer-like .
Note that the guide protects itself against bugs arising from sign mismatch, like views::iota(0, v.size()), where 0 is signed and v.size() is unsigned.
[edit] Example
Run this code
#include <cassert> #include <ranges> int main() { auto io = std::ranges::iota_view(1L, 7L); // deduces W and Bound as “long” assert(io.front() == 1L and io.back() == 6L); }