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Delete commented-out dead code.

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Has been dead since 2009.
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H. S. Teoh 2015-01-22 11:25:25 -08:00
parent 8814b27d8d
commit 3fb23fa606
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135
std/algorithm/package.d
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@ -299,141 +299,6 @@ template forward(args...)
auto x2 = bar(value); // case of OK
}
// overwriteAdjacent
/*
Reduces $(D r) by shifting it to the left until no adjacent elements
$(D a), $(D b) remain in $(D r) such that $(D pred(a, b)). Shifting is
performed by evaluating $(D move(source, target)) as a primitive. The
algorithm is stable and runs in $(BIGOH r.length) time. Returns the
reduced range.
The default $(XREF _algorithm, move) performs a potentially
destructive assignment of $(D source) to $(D target), so the objects
beyond the returned range should be considered "empty". By default $(D
pred) compares for equality, in which case $(D overwriteAdjacent)
collapses adjacent duplicate elements to one (functionality akin to
the $(WEB wikipedia.org/wiki/Uniq, uniq) system utility).
Example:
----
int[] arr = [ 1, 2, 2, 2, 2, 3, 4, 4, 4, 5 ];
auto r = overwriteAdjacent(arr);
assert(r == [ 1, 2, 3, 4, 5 ]);
----
*/
// Range overwriteAdjacent(alias pred, alias move, Range)(Range r)
// {
// if (r.empty) return r;
// //auto target = begin(r), e = end(r);
// auto target = r;
// auto source = r;
// source.popFront();
// while (!source.empty)
// {
// if (!pred(target.front, source.front))
// {
// target.popFront();
// continue;
// }
// // found an equal *source and *target
// for (;;)
// {
// //@@@
// //move(source.front, target.front);
// target[0] = source[0];
// source.popFront();
// if (source.empty) break;
// if (!pred(target.front, source.front)) target.popFront();
// }
// break;
// }
// return range(begin(r), target + 1);
// }
// /// Ditto
// Range overwriteAdjacent(
// string fun = "a == b",
// alias move = .move,
// Range)(Range r)
// {
// return .overwriteAdjacent!(binaryFun!(fun), move, Range)(r);
// }
// unittest
// {
// int[] arr = [ 1, 2, 2, 2, 2, 3, 4, 4, 4, 5 ];
// auto r = overwriteAdjacent(arr);
// assert(r == [ 1, 2, 3, 4, 5 ]);
// assert(arr == [ 1, 2, 3, 4, 5, 3, 4, 4, 4, 5 ]);
// }
// eliminate
/* *
Reduces $(D r) by overwriting all elements $(D x) that satisfy $(D
pred(x)). Returns the reduced range.
Example:
----
int[] arr = [ 1, 2, 3, 4, 5 ];
// eliminate even elements
auto r = eliminate!("(a & 1) == 0")(arr);
assert(r == [ 1, 3, 5 ]);
assert(arr == [ 1, 3, 5, 4, 5 ]);
----
*/
// Range eliminate(alias pred,
// SwapStrategy ss = SwapStrategy.unstable,
// alias move = .move,
// Range)(Range r)
// {
// alias It = Iterator!(Range);
// static void assignIter(It a, It b) { move(*b, *a); }
// return range(begin(r), partitionold!(not!(pred), ss, assignIter, Range)(r));
// }
// unittest
// {
// int[] arr = [ 1, 2, 3, 4, 5 ];
// // eliminate even elements
// auto r = eliminate!("(a & 1) == 0")(arr);
// assert(find!("(a & 1) == 0")(r).empty);
// }
/* *
Reduces $(D r) by overwriting all elements $(D x) that satisfy $(D
pred(x, v)). Returns the reduced range.
Example:
----
int[] arr = [ 1, 2, 3, 2, 4, 5, 2 ];
// keep elements different from 2
auto r = eliminate(arr, 2);
assert(r == [ 1, 3, 4, 5 ]);
assert(arr == [ 1, 3, 4, 5, 4, 5, 2 ]);
----
*/
// Range eliminate(alias pred = "a == b",
// SwapStrategy ss = SwapStrategy.semistable,
// Range, Value)(Range r, Value v)
// {
// alias It = Iterator!(Range);
// bool comp(typeof(*It) a) { return !binaryFun!(pred)(a, v); }
// static void assignIterB(It a, It b) { *a = *b; }
// return range(begin(r),
// partitionold!(comp,
// ss, assignIterB, Range)(r));
// }
// unittest
// {
// int[] arr = [ 1, 2, 3, 2, 4, 5, 2 ];
// // keep elements different from 2
// auto r = eliminate(arr, 2);
// assert(r == [ 1, 3, 4, 5 ]);
// assert(arr == [ 1, 3, 4, 5, 4, 5, 2 ]);
// }
/**
Specifies whether the output of certain algorithm is desired in sorted
format.