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Add separate example for each with index

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Remove doc-comment for example that wasn't as clear.
This commit is contained in:
Nick Treleaven 2021-03-19 14:14:09 +00:00
parent 1af0e4d5e9
commit 18a647bed4
1 changed files with 11 additions and 5 deletions
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16
std/algorithm/iteration.d
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@ -1122,11 +1122,18 @@ public:
// The default predicate consumes the range
(&m).each();
assert(m.empty);
}
/// `each` can pass an index variable for iterable objects which support this
@safe unittest
{
auto arr = new int[4];
// Indexes are also available for in-place mutations
arr[] = 0;
arr.each!"a=i"();
assert(arr == [0, 1, 2, 3, 4, 5]);
assert(arr == [0, 1, 2, 3]);
arr.each!((i, ref e) => e = cast(int) i * 2);
assert(arr == [0, 2, 4, 6]);
}
/// opApply iterators work as well
@ -1225,10 +1232,9 @@ public:
// https://issues.dlang.org/show_bug.cgi?id=15357
// `each` should behave similar to foreach
/// `each` works with iterable objects which provide an index variable, along with each element
@safe unittest
{
import std.range : iota, lockstep;
import std.range : iota;
auto arr = [1, 2, 3, 4];