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Make containers work with non-copyable elements

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It is the first step. The containers can be at least created with
non-copyable structs without compilation errors now.
Fix #69.
This commit is contained in:
Eugen Wissner 2018-11-24 06:25:55 +01:00
parent 884dc30953
commit 49d7452b33
8 changed files with 215 additions and 89 deletions
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45
source/tanya/container/array.d
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@ -22,6 +22,7 @@ import tanya.memory;
import tanya.meta.trait;
import tanya.meta.transform;
import tanya.range;
version (unittest) import tanya.test.stub;
/**
* Random-access range for the $(D_PSYMBOL Array).
@ -293,7 +294,9 @@ struct Array(T)
* init = Initial value to fill the array with.
* allocator = Allocator.
*/
this(size_t len, T init, shared Allocator allocator = defaultAllocator)
this()(size_t len,
auto ref T init,
shared Allocator allocator = defaultAllocator)
{
this(allocator);
reserve(len);
@ -348,15 +351,19 @@ struct Array(T)
(() @trusted => allocator.deallocate(slice(capacity)))();
}
/**
* Copies the array.
*/
this(this)
static if (isCopyable!T)
{
auto buf = slice(this.length);
this.length_ = capacity_ = 0;
this.data = null;
insertBack(buf);
this(this)
{
auto buf = slice(this.length);
this.length_ = capacity_ = 0;
this.data = null;
insertBack(buf);
}
}
else
{
@disable this(this);
}
/**
@ -1027,7 +1034,7 @@ struct Array(T)
}
/// ditto
Range opIndexAssign(Range value)
Range opIndexAssign()(Range value)
{
return opSliceAssign(value, 0, length);
}
@ -1321,7 +1328,7 @@ struct Array(T)
}
/// ditto
Range opSliceAssign(Range value, size_t i, size_t j) @trusted
Range opSliceAssign()(Range value, size_t i, size_t j) @trusted
in
{
assert(i <= j);
@ -1575,15 +1582,10 @@ struct Array(T)
assert(v7[].equal(v8[]));
}
// Destructor can destroy empty arrays
@nogc nothrow pure @safe unittest
{
static struct SWithDtor
{
~this() @nogc nothrow pure @safe
{
}
}
auto v = Array!SWithDtor(); // Destructor can destroy empty arrays.
auto v = Array!WithDtor();
}
@nogc nothrow pure @safe unittest
@ -1594,7 +1596,6 @@ struct Array(T)
A a1, a2;
auto v1 = Array!A([a1, a2]);
// Issue 232: https://issues.caraus.io/issues/232.
static assert(is(Array!(A*)));
}
@ -1679,3 +1680,9 @@ struct Array(T)
}
func(array);
}
// Can have non-copyable elements
@nogc nothrow pure @safe unittest
{
static assert(is(Array!NonCopyable));
}

17
source/tanya/container/entry.d
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@ -20,6 +20,7 @@ import tanya.memory.allocator;
import tanya.meta.trait;
import tanya.meta.transform;
import tanya.typecons;
version (unittest) import tanya.test.stub;
package struct SEntry(T)
{
@ -59,12 +60,12 @@ package struct Bucket(K, V = void)
}
BucketStatus status = BucketStatus.empty;
this(ref K key)
this()(ref K key)
{
this.key = key;
}
@property void key(ref K key)
@property void key()(ref K key)
{
this.key() = key;
this.status = BucketStatus.used;
@ -170,7 +171,7 @@ package struct HashArray(alias hasher, K, V = void)
.swap(this.length, data.length);
}
void opAssign(ref typeof(this) that)
void opAssign()(ref typeof(this) that)
{
this.array = that.array;
this.lengthIndex = that.lengthIndex;
@ -326,3 +327,13 @@ package struct HashArray(alias hasher, K, V = void)
return false;
}
}
// Can be constructed with non-copyable key/values
@nogc nothrow pure @safe unittest
{
static assert(is(Bucket!NonCopyable));
static assert(is(Bucket!(NonCopyable, NonCopyable)));
static assert(is(HashArray!((ref NonCopyable) => 0U, NonCopyable)));
static assert(is(HashArray!((ref NonCopyable) => 0U, NonCopyable, NonCopyable)));
}

22
source/tanya/container/hashtable.d
View File

@ -22,6 +22,7 @@ import tanya.memory;
import tanya.meta.trait;
import tanya.meta.transform;
import tanya.range.primitive;
version (unittest) import tanya.test.stub;
/**
* Bidirectional range whose element type is a tuple of a key and the
@ -68,7 +69,7 @@ struct Range(T)
return this.dataRange.empty();
}
@property void popFront()
void popFront()
in
{
assert(!empty);
@ -87,7 +88,7 @@ struct Range(T)
while (!empty && dataRange.front.status != BucketStatus.used);
}
@property void popBack()
void popBack()
in
{
assert(!empty);
@ -759,7 +760,7 @@ if (isHashFunction!(hasher, Key))
*
* Returns: The number of the inserted elements with a unique key.
*/
size_t insert(ref KeyValue keyValue)
size_t insert()(ref KeyValue keyValue)
{
auto e = ((ref v) @trusted => &this.data.insert(v))(keyValue.key);
size_t inserted;
@ -773,7 +774,7 @@ if (isHashFunction!(hasher, Key))
}
/// ditto
size_t insert(KeyValue keyValue)
size_t insert()(KeyValue keyValue)
{
auto e = ((ref v) @trusted => &this.data.insert(v))(keyValue.key);
size_t inserted;
@ -1197,3 +1198,16 @@ if (isHashFunction!(hasher, Key))
static assert(is(typeof("asdf" in HashTable!(String, int)())));
static assert(is(typeof(HashTable!(String, int)()["asdf"])));
}
// Can have non-copyable keys and elements
@nogc nothrow pure @safe unittest
{
@NonCopyable @Hashable
static struct S
{
mixin StructStub;
}
static assert(is(HashTable!(S, int)));
static assert(is(HashTable!(int, S)));
static assert(is(HashTable!(S, S)));
}

90
source/tanya/container/list.d
View File

@ -23,6 +23,7 @@ import tanya.meta.trait;
import tanya.meta.transform;
import tanya.range.array;
import tanya.range.primitive;
version (unittest) import tanya.test.stub;
/**
* Forward range for the $(D_PSYMBOL SList).
@ -155,8 +156,9 @@ struct SList(T)
* init = Initial value to fill the list with.
* allocator = Allocator.
*/
this(size_t len, T init, shared Allocator allocator = defaultAllocator)
@trusted
this()(size_t len,
auto ref T init,
shared Allocator allocator = defaultAllocator)
{
this(allocator);
if (len == 0)
@ -182,7 +184,18 @@ struct SList(T)
/// ditto
this(size_t len, shared Allocator allocator = defaultAllocator)
{
this(len, T.init, allocator);
this(allocator);
if (len == 0)
{
return;
}
Entry* next = this.head = allocator.make!Entry();
foreach (i; 1 .. len)
{
next.next = allocator.make!Entry();
next = next.next;
}
}
///
@ -271,14 +284,18 @@ struct SList(T)
clear();
}
/**
* Copies the list.
*/
this(this)
static if (isCopyable!T)
{
auto list = typeof(this)(this[], this.allocator);
this.head = list.head;
list.head = null;
this(this)
{
auto list = typeof(this)(this[], this.allocator);
this.head = list.head;
list.head = null;
}
}
else
{
@disable this(this);
}
///
@ -512,7 +529,7 @@ struct SList(T)
}
/// ditto
size_t insertBefore(Range r, ref T el) @trusted
size_t insertBefore()(Range r, ref T el) @trusted
in
{
assert(checkRangeBelonging(r));
@ -1120,8 +1137,9 @@ struct DList(T)
* init = Initial value to fill the list with.
* allocator = Allocator.
*/
this(size_t len, T init, shared Allocator allocator = defaultAllocator)
@trusted
this()(size_t len,
auto ref T init,
shared Allocator allocator = defaultAllocator)
{
this(allocator);
if (len == 0)
@ -1150,7 +1168,20 @@ struct DList(T)
/// ditto
this(size_t len, shared Allocator allocator = defaultAllocator)
{
this(len, T.init, allocator);
this(allocator);
if (len == 0)
{
return;
}
Entry* next = this.head = allocator.make!Entry();
foreach (i; 1 .. len)
{
next.next = allocator.make!Entry();
next.next.prev = next;
next = next.next;
}
this.tail = next;
}
///
@ -1242,15 +1273,19 @@ struct DList(T)
clear();
}
/**
* Copies the list.
*/
this(this)
static if (isCopyable!T)
{
auto list = typeof(this)(this[], this.allocator);
this.head = list.head;
this.tail = list.tail;
list.head = list .tail = null;
this(this)
{
auto list = typeof(this)(this[], this.allocator);
this.head = list.head;
this.tail = list.tail;
list.head = list .tail = null;
}
}
else
{
@disable this(this);
}
///
@ -1641,7 +1676,7 @@ struct DList(T)
}
/// ditto
size_t insertBefore(Range r, ref T el) @trusted
size_t insertBefore()(Range r, ref T el) @trusted
in
{
assert(checkRangeBelonging(r));
@ -1758,7 +1793,7 @@ struct DList(T)
}
/// ditto
size_t insertAfter(Range r, ref T el) @trusted
size_t insertAfter()(Range r, ref T el) @trusted
in
{
assert(checkRangeBelonging(r));
@ -2355,3 +2390,10 @@ struct DList(T)
assert(!l1.remove(r).empty);
assert(l1 == l2);
}
// Can have non-copyable elements
@nogc nothrow pure @safe unittest
{
static assert(is(SList!NonCopyable));
static assert(is(DList!NonCopyable));
}

20
source/tanya/container/set.d
View File

@ -22,6 +22,7 @@ import tanya.memory;
import tanya.meta.trait;
import tanya.meta.transform;
import tanya.range.primitive;
version (unittest) import tanya.test.stub;
/**
* Bidirectional range that iterates over the $(D_PSYMBOL Set)'s values.
@ -67,7 +68,7 @@ struct Range(T)
return this.dataRange.empty();
}
@property void popFront()
void popFront()
in
{
assert(!empty);
@ -86,7 +87,7 @@ struct Range(T)
while (!empty && dataRange.front.status != BucketStatus.used);
}
@property void popBack()
void popBack()
in
{
assert(!empty);
@ -459,7 +460,7 @@ if (isHashFunction!(hasher, T))
*
* Returns: Amount of new elements inserted.
*/
size_t insert(ref T value)
size_t insert()(ref T value)
{
auto e = ((ref v) @trusted => &this.data.insert(v))(value);
if (e.status != BucketStatus.used)
@ -470,7 +471,7 @@ if (isHashFunction!(hasher, T))
return 0;
}
size_t insert(T value)
size_t insert()(T value)
{
auto e = ((ref v) @trusted => &this.data.insert(v))(value);
if (e.status != BucketStatus.used)
@ -773,3 +774,14 @@ if (isHashFunction!(hasher, T))
{
static assert(is(Set!(int, (const ref x) => cast(size_t) x)));
}
// Can have non-copyable elements
@nogc nothrow pure @safe unittest
{
@NonCopyable @Hashable
static struct S
{
mixin StructStub;
}
static assert(is(Set!S));
}

15
source/tanya/hash/lookup.d
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@ -16,6 +16,7 @@ module tanya.hash.lookup;
import tanya.meta.trait;
import tanya.range.primitive;
version (unittest) import tanya.test.stub;
private struct FNV
{
@ -146,14 +147,6 @@ version (unittest)
~ r10!x ~ r10!x ~ r10!x ~ r10!x ~ r10!x;
enum string r500(string x) = r100!x ~ r100!x ~ r100!x ~ r100!x ~ r100!x;
private static struct ToHash
{
size_t toHash() const @nogc nothrow pure @safe
{
return 0;
}
}
private static struct HashRange
{
string fo = "fo";
@ -178,9 +171,9 @@ version (unittest)
{
bool empty_;
@property ToHash front() const @nogc nothrow pure @safe
@property Hashable front() const @nogc nothrow pure @safe
{
return ToHash();
return Hashable();
}
void popFront() @nogc nothrow pure @safe
@ -199,7 +192,7 @@ version (unittest)
@nogc nothrow pure @safe unittest
{
assert(hash(null) == 0);
assert(hash(ToHash()) == 0U);
assert(hash(Hashable()) == 0U);
assert(hash('a') == 'a');
}

71
source/tanya/test/stub.d
View File

@ -91,7 +91,7 @@ struct WithLvalueElements
mixin template InputRangeStub(E = int)
{
import tanya.meta.metafunction : Alias;
import tanya.meta.trait : getUDAs, hasUDA;
import tanya.meta.trait : evalUDA, getUDAs, hasUDA;
/*
* Aliases for the attribute lookups to access them faster
@ -279,6 +279,9 @@ mixin template RandomAccessRangeStub(E = int)
/**
* Struct with a disabled postblit constructor.
*
* $(D_PSYMBOL NonCopyable) can be used as an attribute for
* $(D_PSYMBOL StructStub) or as a standalone type.
*/
struct NonCopyable
{
@ -288,10 +291,14 @@ struct NonCopyable
/**
* Struct with an elaborate destructor.
*
* The constructor of $(D_PSYMBOL WithDtor) accepts an additional `counter`
* argument, which is incremented by the destructor. $(D_PSYMBOL WithDtor)
* stores a pointer to the passed variable, so the variable can be
* investigated after the struct isn't available anymore.
* $(D_PSYMBOL WithDtor) can be used as an attribute for
* $(D_PSYMBOL StructStub) or as a standalone type.
*
* When used as a standalone object the constructor of $(D_PSYMBOL WithDtor)
* accepts an additional `counter` argument, which is incremented by the
* destructor. $(D_PSYMBOL WithDtor) stores a pointer to the passed variable,
* so the variable can be investigated after the struct isn't available
* anymore.
*/
struct WithDtor
{
@ -310,3 +317,57 @@ struct WithDtor
}
}
}
/**
* Struct supporting hashing.
*
* $(D_PSYMBOL Hashable) can be used as an attribute for
* $(D_PSYMBOL StructStub) or as a standalone type.
*
* The constructor accepts an additional parameter, which is returned by the
* `toHash()`-function. `0U` is returned if no hash value is given.
*/
struct Hashable
{
size_t hash;
size_t toHash() const @nogc nothrow pure @safe
{
return this.hash;
}
}
/**
* Generates a $(D_KEYWORD struct) with common functionality.
*
* To specify the needed functionality use user-defined attributes on the
* $(D_KEYWORD struct) $(D_PSYMBOL StructStub) is mixed in.
*
* Supported attributes are: $(D_PSYMBOL NonCopyable), $(D_PSYMBOL Hashable),
* $(D_PSYMBOL WithDtor).
*/
mixin template StructStub()
{
import tanya.meta.trait : evalUDA, getUDAs, hasUDA;
static if (hasUDA!(typeof(this), NonCopyable))
{
@disable this(this);
}
private alias Hashable = getUDAs!(typeof(this), .Hashable);
static if (Hashable.length > 0)
{
size_t toHash() const @nogc nothrow pure @safe
{
return evalUDA!(Hashable[0]).hash;
}
}
static if (hasUDA!(typeof(this), WithDtor))
{
~this() @nogc nothrow pure @safe
{
}
}
}

24
source/tanya/typecons.d
View File

@ -503,30 +503,16 @@ struct Option(T)
// Returns default value
@nogc nothrow pure @safe unittest
{
{
int i = 5;
assert(((ref e) => e)(Option!int().or(i)) == 5);
}
int i = 5;
assert(((ref e) => e)(Option!int().or(i)) == 5);
}
// Implements toHash() for nothing
@nogc nothrow pure @safe unittest
{
static struct ToHash
{
size_t toHash() const @nogc nothrow pure @safe
{
return 1U;
}
}
{
Option!ToHash toHash;
assert(toHash.toHash() == 0U);
}
{
auto toHash = Option!ToHash(ToHash());
assert(toHash.toHash() == 1U);
}
alias OptionT = Option!Hashable;
assert(OptionT().toHash() == 0U);
assert(OptionT(Hashable(1U)).toHash() == 1U);
}
/**