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Implement foreach_reverse for the vector

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This commit is contained in:
Eugen Wissner 2016-12-02 14:12:12 +01:00
parent 7c36dbb8f0
commit c53d319337
1 changed files with 58 additions and 6 deletions
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64
source/tanya/container/vector.d
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@ -469,9 +469,7 @@ class Vector(T)
foreach (e; vector)
{
result = dg(e);
if (result != 0)
if ((result = dg(e)) != 0)
{
return result;
}
@ -486,9 +484,7 @@ class Vector(T)
foreach (i, e; vector)
{
result = dg(i, e);
if (result != 0)
if ((result = dg(i, e)) != 0)
{
return result;
}
@ -517,6 +513,62 @@ class Vector(T)
theAllocator.dispose(v);
}
/**
* $(D_KEYWORD foreach) iteration.
*
* Params:
* dg = $(D_KEYWORD foreach) body.
*/
int opApplyReverse(scope int delegate(ref T) dg)
{
int result;
foreach_reverse (e; vector)
{
if ((result = dg(e)) != 0)
{
return result;
}
}
return result;
}
/// Ditto.
int opApplyReverse(scope int delegate(ref size_t i, ref T) dg)
{
int result;
foreach_reverse (i, e; vector)
{
if ((result = dg(i, e)) != 0)
{
return result;
}
}
return result;
}
///
unittest
{
auto v = theAllocator.make!(Vector!int)(5, 15, 8);
size_t i;
foreach_reverse (j, ref e; v)
{
i = j;
}
assert(i == 0);
foreach_reverse (j, e; v)
{
assert(j != 2 || e == 8);
assert(j != 1 || e == 15);
assert(j != 0 || e == 5);
}
theAllocator.dispose(v);
}
/**
* Returns: The first element.
*