deduction guides for std::ranges::iota_view

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std::ranges::iota_view
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Defined in header <ranges>
template < class W, class Bound >

requires ( ! /*is-integer-like*/ < W > ||
! /*is-integer-like*/ < Bound > ||
/*is-signed-integer-like*/ < W > == /*is-signed-integer-like*/ < Bound > )

iota_view ( W, Bound ) - > iota_view < W, Bound > ;
(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.

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);
}
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