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deduction guides for std::ranges::iota_view

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定义于头文件 <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 > ;
(C++20 起)

此 推导指引 为 iota_view 提供，允许从初始值和边界值进行推导。

关于 /*is-integer-like*/ 和 /*is-signed-integer-like*/ 的定义，请参阅 is-integer-like 。

请注意，本指南已针对符号不匹配引发的错误进行了防护，例如 views:: iota ( 0 , v. size ( ) ) 这种情况，其中 ​ 0 ​ 为有符号数，而 v. size ( ) 为无符号数。

示例

运行此代码 
#include <cassert>
#include <ranges>
int main()
{
    auto io = std::ranges::iota_view(1L, 7L); // 推导 W 和 Bound 为 "long" 类型
    assert(io.front() == 1L and io.back() == 6L);
}