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Fix InputRanges for non-copyable elements

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This commit is contained in:
Eugen Wissner 2021-03-11 10:18:02 +01:00
parent a227b58407
commit f27f62b80a
Signed by: belka
GPG Key ID: A27FDC1E8EE902C0
16 changed files with 27 additions and 510 deletions
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375
source/tanya/algorithm/comparison.d
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@ -1,375 +0,0 @@
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* Algorithms for comparing values.
*
* Copyright: Eugene Wissner 2018-2020.
* License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
* Mozilla Public License, v. 2.0).
* Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
* Source: $(LINK2 https://github.com/caraus-ecms/tanya/blob/master/source/tanya/algorithm/comparison.d,
* tanya/algorithm/comparison.d)
*/
module tanya.algorithm.comparison;
import std.traits : CommonType;
import tanya.algorithm.mutation;
import tanya.math;
static import tanya.memory.op;
import tanya.meta.metafunction;
import tanya.meta.trait;
import tanya.meta.transform;
import tanya.range.array;
import tanya.range.primitive;
private ref inout(Args[0]) minMax(alias cmp, Args...)(ref inout Args args)
{
auto actual = ((ref arg) @trusted => &arg)(args[0]);
foreach (i, arg; args[1 .. $])
{
static if (isFloatingPoint!(Args[0]))
{
if (isNaN(arg))
{
continue;
}
if (isNaN(*actual))
{
actual = ((ref arg) @trusted => &arg)(args[i + 1]);
continue;
}
}
if (cmp(arg, *actual))
{
actual = ((ref arg) @trusted => &arg)(args[i + 1]);
}
}
return *actual;
}
private T moveIf(T)(ref T arg)
{
static if (hasElaborateCopyConstructor!T && isMutable!T)
{
return move(arg);
}
else
{
return arg;
}
}
/**
* Finds the smallest element in the argument list or a range.
*
* If a range is passed, $(D_PSYMBOL min) returns a range of the same type,
* whose front element is the smallest in the range. If more than one element
* fulfills this condition, the front of the returned range points to
* the first one found.
* If $(D_PARAM range) is empty, the original range is returned.
*
* If $(D_PARAM Args) are floating point numbers, $(B NaN) is not considered
* for comparison. $(B NaN) is returned only if all arguments are $(B NaN)s.
*
* Params:
* Args = Types of the arguments. All arguments should have the same type.
* Range = Forward range type.
* args = Argument list.
* range = Forward range.
*
* Returns: The smallest element.
*/
CommonType!Args min(Args...)(Args args)
if (Args.length >= 2
&& isOrderingComparable!(Args[0])
&& allSameType!(Map!(Unqual, Args)))
{
return moveIf(minMax!((ref a, ref b) => a < b)(args));
}
/// ditto
ref inout(Unqual!(Args[0])) min(Args...)(ref inout Args args)
if (Args.length >= 2
&& isOrderingComparable!(Args[0])
&& allSameType!(Map!(Unqual, Args)))
{
return minMax!((ref a, ref b) => a < b)(args);
}
/// ditto
Range min(Range)(Range range)
if (isForwardRange!Range && isOrderingComparable!(ElementType!Range))
{
if (range.empty)
{
return range;
}
auto actual = range.save;
range.popFront();
for (; !range.empty; range.popFront())
{
if (range.front < actual.front)
{
actual = range.save;
}
}
return actual;
}
///
@nogc nothrow pure @safe unittest
{
assert(min(1, 2) == 1);
assert(min(3, 2) == 2);
assert(min(3, 1, 2) == 1);
int[4] range = [3, 1, 1, 2];
auto minElement = min(range[]);
assert(minElement.front == 1);
assert(minElement.length == 3);
}
/**
* Finds the largest element in the argument list or a range.
*
* If a range is passed, $(D_PSYMBOL max) returns a range of the same type,
* whose front element is the largest in the range. If more than one element
* fulfills this condition, the front of the returned range points to
* the first one found.
* If $(D_PARAM range) is empty, the original range is returned.
*
* If $(D_PARAM Args) are floating point numbers, $(B NaN) is not considered
* for comparison. $(B NaN) is returned only if all arguments are $(B NaN)s.
*
* Params:
* Args = Types of the arguments. All arguments should have the same type.
* Range = Forward range type.
* args = Argument list.
* range = Forward range.
*
* Returns: The largest element.
*/
CommonType!Args max(Args...)(Args args)
if (Args.length >= 2
&& isOrderingComparable!(Args[0])
&& allSameType!(Map!(Unqual, Args)))
{
return moveIf(minMax!((ref a, ref b) => a > b)(args));
}
/// ditto
ref inout(Unqual!(Args[0])) max(Args...)(ref inout Args args)
if (Args.length >= 2
&& isOrderingComparable!(Args[0])
&& allSameType!(Map!(Unqual, Args)))
{
return minMax!((ref a, ref b) => a > b)(args);
}
/// ditto
Range max(Range)(Range range)
if (isForwardRange!Range && isOrderingComparable!(ElementType!Range))
{
if (range.empty)
{
return range;
}
auto actual = range.save;
range.popFront();
for (; !range.empty; range.popFront())
{
if (range.front > actual.front)
{
actual = range.save;
}
}
return actual;
}
///
@nogc nothrow pure @safe unittest
{
assert(max(1, 2) == 2);
assert(max(3, 2) == 3);
assert(max(1, 3, 2) == 3);
int[4] range = [1, 5, 5, 2];
auto maxElement = max(range[]);
assert(maxElement.front == 5);
assert(maxElement.length == 3);
}
/**
* Compares element-wise two ranges for equality.
*
* If the ranges have different lengths, they aren't equal.
*
* Params:
* pred = Predicate used to compare individual element pairs.
* R1 = First range type.
* R2 = Second range type.
* r1 = First range.
* r2 = Second range.
*
* Returns: $(D_KEYWORD true) if both ranges are equal, $(D_KEYWORD false)
* otherwise.
*/
bool equal(alias pred = (auto ref a, auto ref b) => a == b, R1, R2)
(R1 r1, R2 r2)
if (allSatisfy!(isInputRange, R1, R2)
&& is(typeof(pred(r1.front, r2.front)) == bool))
{
static if (isDynamicArray!R1
&& is(R1 == R2)
&& __traits(isPOD, ElementType!R1))
{
return tanya.memory.op.equal(r1, r2);
}
else
{
static if (hasLength!R1 && hasLength!R2)
{
if (r1.length != r2.length)
{
return false;
}
}
for (; !r1.empty && !r2.empty; r1.popFront(), r2.popFront())
{
if (!pred(r1.front, r2.front))
{
return false;
}
}
static if (hasLength!R1 && hasLength!R2)
{
return true;
}
else
{
return r1.empty && r2.empty;
}
}
}
///
@nogc nothrow pure @safe unittest
{
int[2] range1 = [1, 2];
assert(equal(range1[], range1[]));
int[3] range2 = [1, 2, 3];
assert(!equal(range1[], range2[]));
}
/**
* Compares element-wise two ranges for ordering.
*
* $(D_PSYMBOL compare) returns a negative value if $(D_PARAM r1) is less than
* $(D_PARAM r2), a positive value if $(D_PARAM r2) is less than $(D_PARAM r1),
* or `0` if $(D_PARAM r1) and $(D_PARAM r2) equal.
*
* $(D_PSYMBOL compare) iterates both ranges in lockstep. Whichever of them
* contains an element that is greater than the respective element at the same
* position in the other range is the greater one of the two.
*
* If one of the ranges becomes empty when iterating, but all elements equal so
* far, the range with more elements is the greater one.
*
* If $(D_PARAM pred) is given, it is used for comparison. $(D_PARAM pred) is
* called as $(D_INLINECODE pred(r1.front, r2.front)) and
* $(D_INLINECODE pred(r2.front, r1.front)) to perform three-way comparison.
* $(D_PARAM pred) should return a $(D_KEYWORD bool).
*
* If $(D_PARAM pred) is not given, but the element type of $(D_PARAM R1)
* defines `opCmp()` for the element type of $(D_PARAM R2), `opCmp()` is used.
*
* Otherwise the comparison is perfomed using the basic comparison operators.
*
* Params:
* pred = Predicate used for comparison.
* R1 = First range type.
* R2 = Second range type.
* r1 = First range.
* r2 = Second range.
*
* Returns: A negative value if $(D_PARAM r1) is less than $(D_PARAM r2), a
* positive value if $D(_PARAM r2) is less than $(D_PARAM r1), `0`
* otherwise.
*/
int compare(alias pred, R1, R2)(R1 r1, R2 r2)
if (allSatisfy!(isInputRange, R1, R2)
&& is(typeof(pred(r1.front, r2.front)) == bool)
&& is(typeof(pred(r2.front, r1.front)) == bool))
{
alias predImpl = (ref r1, ref r2) {
return pred(r2.front, r1.front) - pred(r1.front, r2.front);
};
return compareImpl!(predImpl, R1, R2)(r1, r2);
}
/// ditto
int compare(R1, R2)(R1 r1, R2 r2)
if (allSatisfy!(isInputRange, R1, R2)
&& is(typeof(r1.front < r2.front || r2.front < r1.front)))
{
static if (is(typeof(r1.front.opCmp(r2.front)) == int))
{
alias pred = (ref r1, ref r2) => r1.front.opCmp(r2.front);
}
else
{
alias pred = (ref r1, ref r2) {
return (r2.front < r1.front) - (r1.front < r2.front);
};
}
return compareImpl!(pred, R1, R2)(r1, r2);
}
///
@nogc nothrow pure @safe unittest
{
assert(compare("abc", "abc") == 0);
assert(compare("abcd", "abc") > 0);
assert(compare("ab", "abc") < 0);
assert(compare("abc", "abcd") < 0);
assert(compare("abc", "ab") > 0);
assert(compare("aec", "abc") > 0);
assert(compare("aac", "abc") < 0);
assert(compare("abc", "aec") < 0);
assert(compare("abc", "aab") > 0);
assert(compare("aacd", "abc") < 0);
assert(compare("abc", "aacd") > 0);
assert(compare!((a, b) => a > b)("aec", "abc") < 0);
assert(compare!((a, b) => a > b)("aac", "abc") > 0);
}
private int compareImpl(alias pred, R1, R2)(ref R1 r1, ref R2 r2)
{
for (; !r1.empty || !r2.empty; r1.popFront(), r2.popFront())
{
if (r1.empty)
{
return -1;
}
else if (r2.empty)
{
return 1;
}
const comparison = pred(r1, r2);
if (comparison != 0)
{
return comparison;
}
}
return 0;
}

4
source/tanya/algorithm/iteration.d
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@ -20,7 +20,7 @@
*/
module tanya.algorithm.iteration;
import tanya.algorithm.comparison;
import std.algorithm.comparison;
import tanya.memory.lifetime;
import tanya.meta.trait;
import tanya.meta.transform;
@ -558,8 +558,6 @@ if (isBidirectionalRange!Range)
///
@nogc nothrow pure @safe unittest
{
import tanya.algorithm.comparison : equal;
const int[3] given = [1, 2, 3];
const int[3] expected = [3, 2, 1];

10
source/tanya/algorithm/mutation.d
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@ -77,7 +77,7 @@ do
///
@nogc nothrow pure @safe unittest
{
import tanya.algorithm.comparison : equal;
import std.algorithm.comparison : equal;
const int[2] source = [1, 2];
int[2] target = [3, 4];
@ -114,7 +114,7 @@ if (isInputRange!Range && isAssignable!(ElementType!Range, Value))
///
@nogc nothrow pure @safe unittest
{
import tanya.algorithm.comparison : equal;
import std.algorithm.comparison : equal;
int[6] actual;
const int[6] expected = [1, 1, 1, 1, 1, 1];
@ -154,7 +154,7 @@ if (isInputRange!Range && hasLvalueElements!Range
///
@nogc nothrow pure @safe unittest
{
import tanya.algorithm.comparison : equal;
import std.algorithm.comparison : equal;
int[6] actual = void;
const int[6] expected = [1, 1, 1, 1, 1, 1];
@ -196,7 +196,7 @@ if (isInputRange!Range && hasLvalueElements!Range)
///
@nogc nothrow pure @safe unittest
{
import tanya.algorithm.comparison : equal;
import std.algorithm.comparison : equal;
int[2] actual = void;
const int[2] expected = [0, 0];
@ -287,7 +287,7 @@ if (isForwardRange!Range && hasSwappableElements!Range)
///
@nogc nothrow pure @safe unittest
{
import tanya.algorithm.comparison : equal;
import std.algorithm.comparison : equal;
const int[7] expected = [1, 2, 3, 4, 5, 6, 7];
int[7] actual = [5, 6, 3, 4, 1, 2, 7];

1
source/tanya/algorithm/package.d
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@ -14,7 +14,6 @@
*/
module tanya.algorithm;
public import tanya.algorithm.comparison;
public import tanya.algorithm.iteration;
public import tanya.algorithm.mutation;
public import tanya.algorithm.searching;

2
source/tanya/async/event/epoll.d
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@ -23,7 +23,7 @@ import core.stdc.errno;
public import core.sys.linux.epoll;
import core.sys.posix.unistd;
import core.time;
import tanya.algorithm.comparison;
import std.algorithm.comparison;
import tanya.async.event.selector;
import tanya.async.loop;
import tanya.async.protocol;

2
source/tanya/container/array.d
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@ -15,7 +15,7 @@
module tanya.container.array;
import core.checkedint;
import tanya.algorithm.comparison;
import std.algorithm.comparison;
import tanya.algorithm.iteration;
import tanya.algorithm.mutation;
import tanya.memory.allocator;

2
source/tanya/container/list.d
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@ -15,7 +15,7 @@
*/
module tanya.container.list;
import tanya.algorithm.comparison;
import std.algorithm.comparison;
import tanya.algorithm.iteration;
import tanya.container.entry;
import tanya.memory.allocator;

14
source/tanya/container/string.d
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@ -26,7 +26,7 @@
*/
module tanya.container.string;
import tanya.algorithm.comparison;
import std.algorithm.comparison;
import tanya.algorithm.mutation;
import tanya.hash.lookup;
import tanya.memory.allocator;
@ -1166,29 +1166,29 @@ struct String
int opCmp(S)(auto ref S that) const @trusted
if (is(Unqual!S == String))
{
return compare(this.data[0 .. length], that.data[0 .. that.length]);
return cmp(this.data[0 .. length], that.data[0 .. that.length]);
}
/// ditto
int opCmp(S)(ByCodeUnit!S that) const @trusted
if (is(Unqual!S == char))
{
return compare(this.data[0 .. length],
that.begin[0 .. that.end - that.begin]);
return cmp(this.data[0 .. length],
that.begin[0 .. that.end - that.begin]);
}
/// ditto
int opCmp(S)(ByCodePoint!S that) const @trusted
if (is(Unqual!S == char))
{
return compare(this.data[0 .. length],
that.begin[0 .. that.end - that.begin]);
return cmp(this.data[0 .. length],
that.begin[0 .. that.end - that.begin]);
}
/// ditto
int opCmp()(const char[] that) const @trusted
{
return compare(this.data[0 .. length], that);
return cmp(this.data[0 .. length], that);
}
///

2
source/tanya/format.d
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@ -47,7 +47,7 @@
*/
module tanya.format;
import tanya.algorithm.comparison;
import std.algorithm.comparison;
import tanya.container.string;
import tanya.encoding.ascii;
import tanya.math;

4
source/tanya/net/ip.d
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@ -14,7 +14,7 @@
*/
module tanya.net.ip;
import tanya.algorithm.comparison;
import std.algorithm.comparison;
import tanya.algorithm.iteration;
import tanya.algorithm.mutation;
import tanya.container.string;
@ -465,7 +465,7 @@ struct Address6
*/
int opCmp(ref const Address6 that) const @nogc nothrow pure @safe
{
const diff = compare(this.address[], that.address[]);
const diff = cmp(this.address[], that.address[]);
if (diff == 0)
{
return (that.scopeID < this.scopeID) - (this.scopeID < that.scopeID);

1
source/tanya/network/socket.d
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@ -53,7 +53,6 @@ module tanya.network.socket;
import core.stdc.errno;
import core.time;
public import std.socket : SocketOption, SocketOptionLevel;
import tanya.algorithm.comparison;
import tanya.bitmanip;
import tanya.memory.allocator;
import tanya.meta.trait;

4
source/tanya/range/primitive.d
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@ -14,7 +14,7 @@
*/
module tanya.range.primitive;
import tanya.algorithm.comparison;
import std.algorithm.comparison;
import tanya.memory.lifetime;
import tanya.meta.trait;
import tanya.meta.transform;
@ -305,7 +305,7 @@ private template isDynamicArrayRange(R)
private struct Primitive(Candidate, string primitive)
{
auto ref returnType(Candidate candidate)
auto ref returnType(ref Candidate candidate)
{
mixin("return candidate." ~ primitive ~ ";");
}

97
tests/tanya/algorithm/tests/comparison.d
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@ -1,97 +0,0 @@
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
module tanya.algorithm.tests.comparison;
import tanya.algorithm.comparison;
import tanya.math;
import tanya.range;
@nogc nothrow pure @safe unittest
{
static assert(!is(typeof(min(1, 1UL))));
}
@nogc nothrow pure @safe unittest
{
assert(min(5, 3) == 3);
assert(min(4, 4) == 4);
assert(min(5.2, 3.0) == 3.0);
assert(min(5.2, double.nan) == 5.2);
assert(min(double.nan, 3.0) == 3.0);
assert(isNaN(min(double.nan, double.nan)));
}
@nogc nothrow pure @safe unittest
{
assert(min(cast(ubyte[]) []).empty);
}
@nogc nothrow pure @safe unittest
{
static assert(!is(typeof(max(1, 1UL))));
}
@nogc nothrow pure @safe unittest
{
assert(max(5, 3) == 5);
assert(max(4, 4) == 4);
assert(max(5.2, 3.0) == 5.2);
assert(max(5.2, double.nan) == 5.2);
assert(max(double.nan, 3.0) == 3.0);
assert(isNaN(max(double.nan, double.nan)));
}
@nogc nothrow pure @safe unittest
{
assert(max(cast(ubyte[]) []).empty);
}
// min/max compare const and mutable structs.
@nogc nothrow pure @safe unittest
{
static struct S
{
int s;
int opCmp(typeof(this) that) const @nogc nothrow pure @safe
{
return this.s - that.s;
}
}
{
const s1 = S(1);
assert(min(s1, S(2)).s == 1);
assert(max(s1, S(2)).s == 2);
}
{
auto s2 = S(2), s3 = S(3);
assert(min(s2, s3).s == 2);
assert(max(s2, s3).s == 3);
}
}
@nogc nothrow pure @safe unittest
{
static struct OpCmp(int value)
{
int opCmp(OpCmp) @nogc nothrow pure @safe
{
return value;
}
}
{
OpCmp!(-1)[1] range;
assert(compare(range[], range[]) < 0);
}
{
OpCmp!1[1] range;
assert(compare(range[], range[]) > 0);
}
{
OpCmp!0[1] range;
assert(compare(range[], range[]) == 0);
}
}

8
tests/tanya/algorithm/tests/mutation.d
View File

@ -17,7 +17,7 @@ import tanya.test.stub;
// Copies overlapping arrays
@nogc nothrow pure @safe unittest
{
import tanya.algorithm.comparison : equal;
import std.algorithm.comparison : equal;
int[6] actual = [1, 2, 3, 4, 5, 6];
const int[6] expected = [1, 2, 1, 2, 3, 4];
@ -94,7 +94,7 @@ import tanya.test.stub;
@nogc nothrow pure @safe unittest
{
import tanya.algorithm.comparison : equal;
import std.algorithm.comparison : equal;
const int[5] expected = [1, 2, 3, 4, 5];
int[5] actual = [4, 5, 1, 2, 3];
@ -106,7 +106,7 @@ import tanya.test.stub;
// Doesn't cause an infinite loop if back is shorter than the front
@nogc nothrow pure @safe unittest
{
import tanya.algorithm.comparison : equal;
import std.algorithm.comparison : equal;
const int[5] expected = [1, 2, 3, 4, 5];
int[5] actual = [3, 4, 5, 1, 2];
@ -118,7 +118,7 @@ import tanya.test.stub;
// Doesn't call .front on an empty front
@nogc nothrow pure @safe unittest
{
import tanya.algorithm.comparison : equal;
import std.algorithm.comparison : equal;
const int[2] expected = [2, 8];
int[2] actual = expected;

9
tests/tanya/container/tests/array.d
View File

@ -3,7 +3,7 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
module tanya.container.tests.array;
import tanya.algorithm.comparison;
import std.algorithm.comparison;
import tanya.container.array;
import tanya.memory.allocator;
import tanya.test.stub;
@ -187,10 +187,3 @@ import tanya.test.stub;
}
func(array);
}
// Can have non-copyable elements
@nogc nothrow pure @safe unittest
{
static assert(is(Array!NonCopyable));
static assert(is(typeof({ Array!NonCopyable.init[0] = NonCopyable(); })));
}

2
tests/tanya/net/tests/iface.d
View File

@ -3,7 +3,7 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
module tanya.net.tests.iface;
import tanya.algorithm.comparison;
import std.algorithm.comparison;
import tanya.net.iface;
@nogc nothrow @safe unittest