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[ranges] Use views::meow in examples instead of meow_view #4659

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Merged
tkoeppe merged 1 commit into from
Jun 17, 2021
Merged

[ranges] Use views::meow in examples instead of meow_view #4659

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34 changes: 14 additions & 20 deletions source/ranges.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -1925,7 +1925,7 @@
\pnum
\begin{example}
\begin{codeblock}
empty_view<int> e;
auto e = views::empty<int>;
static_assert(ranges::empty(e));
static_assert(0 == e.size());
\end{codeblock}
Expand Down Expand Up @@ -1968,8 +1968,7 @@
\pnum
\begin{example}
\begin{codeblock}
single_view s{4};
for (int i : s)
for (int i : views::single(4))
cout << i; // prints \tcode{4}
\end{codeblock}
\end{example}
Expand Down Expand Up @@ -2106,7 +2105,7 @@
\pnum
\begin{example}
\begin{codeblock}
for (int i : iota_view{1, 10})
for (int i : views::iota(1, 10))
cout << i << ' '; // prints: 1 2 3 4 5 6 7 8 9
\end{codeblock}
\end{example}
Expand Down Expand Up @@ -3350,7 +3349,7 @@
\begin{example}
\begin{codeblock}
vector<int> is{ 0, 1, 2, 3, 4, 5, 6 };
filter_view evens{is, [](int i) { return 0 == i % 2; }};
auto evens = views::filter(is, [](int i) { return 0 == i % 2; });
for (int i : evens)
cout << i << ' '; // prints: 0 2 4 6
\end{codeblock}
Expand Down Expand Up @@ -3771,7 +3770,7 @@
\begin{example}
\begin{codeblock}
vector<int> is{ 0, 1, 2, 3, 4 };
transform_view squares{is, [](int i) { return i * i; }};
auto squares = views::transform(is, [](int i) { return i * i; });
for (int i : squares)
cout << i << ' '; // prints: 0 1 4 9 16
\end{codeblock}
Expand Down Expand Up @@ -4482,8 +4481,7 @@
\begin{example}
\begin{codeblock}
vector<int> is{0,1,2,3,4,5,6,7,8,9};
take_view few{is, 5};
for (int i : few)
for (int i : is | views::take(5))
cout << i << ' '; // prints: 0 1 2 3 4
\end{codeblock}
\end{example}
Expand Down Expand Up @@ -4891,8 +4889,7 @@
\begin{example}
\begin{codeblock}
auto ints = views::iota(0) | views::take(10);
auto latter_half = drop_view{ints, 5};
for (auto i : latter_half) {
for (auto i : ints | views::drop(5)) {
cout << i << ' '; // prints \tcode{5 6 7 8 9}
}
\end{codeblock}
Expand Down Expand Up @@ -5020,7 +5017,7 @@
\begin{codeblock}
constexpr auto source = " \t \t \t hello there";
auto is_invisible = [](const auto x) { return x == ' ' || x == '\t'; };
auto skip_ws = drop_while_view{source, is_invisible};
auto skip_ws = views::drop_while(source, is_invisible);
for (auto c : skip_ws) {
cout << c; // prints \tcode{hello there} with no leading space
}
Expand Down Expand Up @@ -5133,8 +5130,7 @@
\begin{example}
\begin{codeblock}
vector<string> ss{"hello", " ", "world", "!"};
join_view greeting{ss};
for (char ch : greeting)
for (char ch : ss | views::join)
cout << ch; // prints: \tcode{hello world!}
\end{codeblock}
\end{example}
Expand Down Expand Up @@ -5619,8 +5615,7 @@
\begin{example}
\begin{codeblock}
string str{"the quick brown fox"};
lazy_split_view sentence{str, ' '};
for (auto word : sentence) {
for (auto word : str | views::lazy_split(' ')) {
for (char ch : word)
cout << ch;
cout << '*';
Expand Down Expand Up @@ -6525,7 +6520,7 @@

template<@\libconcept{forward_range}@ R>
void my_algo(R&& r) {
auto&& common = common_view{r};
auto&& common = views::common(r);
auto cnt = count(common.begin(), common.end());
// ...
}
Expand Down Expand Up @@ -6650,8 +6645,7 @@
\begin{example}
\begin{codeblock}
vector<int> is {0,1,2,3,4};
reverse_view rv {is};
for (int i : rv)
for (int i : is | views::reverse)
cout << i << ' '; // prints: 4 3 2 1 0
\end{codeblock}
\end{example}
Expand Down Expand Up @@ -6795,7 +6789,7 @@

\begin{example}
\begin{codeblock}
auto names = keys_view{historical_figures};
auto names = historical_figures | views::keys;
for (auto&& name : names) {
cout << name << ' '; // prints \tcode{Babbage Hamilton Lovelace Turing }
}
Expand All @@ -6809,7 +6803,7 @@
\begin{example}
\begin{codeblock}
auto is_even = [](const auto x) { return x % 2 == 0; };
cout << ranges::count_if(values_view{historical_figures}, is_even); // prints \tcode{2}
cout << ranges::count_if(historical_figures | views::values, is_even); // prints \tcode{2}
\end{codeblock}
\end{example}

Expand Down