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medianOf restricted for now to only size_t indexes

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This commit is contained in:
Andrei Alexandrescu 2016-09-29 18:45:42 -04:00
parent 1859f0dc19
commit 25dac83dbc
1 changed files with 12 additions and 6 deletions
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18
std/algorithm/sorting.d
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@ -3150,7 +3150,7 @@ private void medianOf(
(Range r, Indexes i)
if (isRandomAccessRange!Range && hasLength!Range &&
Indexes.length >= 2 && Indexes.length <= 5 &&
allSatisfy!(isIntegral, Indexes))
allSatisfy!(isUnsigned, Indexes))
{
assert(r.length >= Indexes.length);
import std.functional : binaryFun;
@ -3159,24 +3159,29 @@ if (isRandomAccessRange!Range && hasLength!Range &&
import std.algorithm.mutation : swapAt;
alias a = i[0];
static assert(is(typeof(a) == size_t));
static if (k >= 2)
{
alias b = i[1];
static assert(is(typeof(b) == size_t));
assert(a != b);
}
static if (k >= 3)
{
alias c = i[2];
static assert(is(typeof(c) == size_t));
assert(a != c && b != c);
}
static if (k >= 4)
{
alias d = i[3];
static assert(is(typeof(d) == size_t));
assert(a != d && b != d && c != d);
}
static if (k >= 5)
{
alias e = i[4];
static assert(is(typeof(e) == size_t));
assert(a != e && b != e && c != e && d != e);
}
@ -3269,23 +3274,24 @@ unittest
do
{
int[5] a = data;
medianOf(a[], 0, 1);
medianOf(a[], size_t(0), size_t(1));
assert(a[0] <= a[1]);
a[] = data[];
medianOf(a[], 0, 1, 2);
medianOf(a[], size_t(0), size_t(1), size_t(2));
assert(ordered(a[0], a[1], a[2]));
a[] = data[];
medianOf(a[], 0, 1, 2, 3);
medianOf(a[], size_t(0), size_t(1), size_t(2), size_t(3));
assert(a[0] <= a[1] && a[1] <= a[2] && a[1] <= a[3]);
a[] = data[];
medianOf!("a < b", Yes.leanRight)(a[], 0, 1, 2, 3);
medianOf!("a < b", Yes.leanRight)(a[], size_t(0), size_t(1),
size_t(2), size_t(3));
assert(a[0] <= a[2] && a[1] <= a[2] && a[2] <= a[3]);
a[] = data[];
medianOf(a[], 0, 1, 2, 3, 4);
medianOf(a[], size_t(0), size_t(1), size_t(2), size_t(3), size_t(4));
assert(a[0] <= a[2] && a[1] <= a[2] && a[2] <= a[3] && a[2] <= a[4]);
}
while (nextPermutation(data[]));