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Make Array.get system function 

.get() returns a memory block that can be changed if the original array
is manipulated after getting the slice. So the slice returned by .get()
may allow access to invalid memory.
This commit is contained in:
Eugen Wissner 2019-04-05 08:58:22 +02:00
parent d55eac3bac
commit e6c6a2d21a
2 changed files with 12 additions and 11 deletions
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21
source/tanya/container/array.d
View File

@ -40,7 +40,8 @@ struct Range(A)
invariant (this.begin >= this.container.data); invariant (this.begin >= this.container.data);
invariant (this.end <= this.container.data + this.container.length); invariant (this.end <= this.container.data + this.container.length);
private this(ref A container, E* begin, E* end) @trusted private this(return ref A container, return E* begin, return E* end)
@trusted
in (begin <= end) in (begin <= end)
in (begin >= container.data) in (begin >= container.data)
in (end <= container.data + container.length) in (end <= container.data + container.length)
@ -123,7 +124,7 @@ struct Range(A)
return typeof(return)(*this.container, this.begin + i, this.begin + j); return typeof(return)(*this.container, this.begin + i, this.begin + j);
} }
inout(E)[] get() inout @trusted inout(E)[] get() inout
{ {
return this.begin[0 .. length]; return this.begin[0 .. length];
} }
@ -172,7 +173,7 @@ struct Array(T)
* init = Values to initialize the array with. * init = Values to initialize the array with.
* allocator = Allocator. * allocator = Allocator.
*/ */
this(R)(R init, shared Allocator allocator = defaultAllocator) this(R)(scope R init, shared Allocator allocator = defaultAllocator)
if (!isInfinite!R if (!isInfinite!R
&& isInputRange!R && isInputRange!R
&& isImplicitlyConvertible!(ElementType!R, T)) && isImplicitlyConvertible!(ElementType!R, T))
@ -225,7 +226,7 @@ struct Array(T)
{ {
// Move each element. // Move each element.
reserve(init.length_); reserve(init.length_);
foreach (ref target; this.data[0 .. init.length_]) foreach (ref target; slice(init.length_))
{ {
moveEmplace(*init.data++, target); moveEmplace(*init.data++, target);
} }
@ -660,7 +661,7 @@ struct Array(T)
} }
/// ditto /// ditto
size_t insertBack(R)(R el) size_t insertBack(R)(scope R el)
if (!isInfinite!R if (!isInfinite!R
&& isInputRange!R && isInputRange!R
&& isImplicitlyConvertible!(ElementType!R, T)) && isImplicitlyConvertible!(ElementType!R, T))
@ -739,7 +740,7 @@ struct Array(T)
* *
* Precondition: $(D_PARAM r) refers to a region of $(D_KEYWORD this). * Precondition: $(D_PARAM r) refers to a region of $(D_KEYWORD this).
*/ */
size_t insertAfter(R)(Range r, R el) size_t insertAfter(R)(Range r, scope R el)
if (!isInfinite!R if (!isInfinite!R
&& isInputRange!R && isInputRange!R
&& isImplicitlyConvertible!(ElementType!R, T)) && isImplicitlyConvertible!(ElementType!R, T))
@ -788,7 +789,7 @@ struct Array(T)
} }
/// ditto /// ditto
size_t insertBefore(R)(Range r, R el) size_t insertBefore(R)(Range r, scope R el)
if (!isInfinite!R if (!isInfinite!R
&& isInputRange!R && isInputRange!R
&& isImplicitlyConvertible!(ElementType!R, T)) && isImplicitlyConvertible!(ElementType!R, T))
@ -1255,13 +1256,13 @@ struct Array(T)
* *
* Returns: The array with elements of this array. * Returns: The array with elements of this array.
*/ */
inout(T[]) get() inout @trusted inout(T[]) get() inout
{ {
return this.data[0 .. length]; return this.data[0 .. length];
} }
/// ///
@nogc nothrow pure @safe unittest @nogc nothrow pure @system unittest
{ {
auto v = Array!int([1, 2, 4]); auto v = Array!int([1, 2, 4]);
auto data = v.get(); auto data = v.get();
@ -1317,7 +1318,7 @@ struct Array(T)
* *
* Returns: $(D_KEYWORD this). * Returns: $(D_KEYWORD this).
*/ */
ref typeof(this) opAssign(R)(R that) ref typeof(this) opAssign(R)(scope R that)
if (!isInfinite!R if (!isInfinite!R
&& isInputRange!R && isInputRange!R
&& isImplicitlyConvertible!(ElementType!R, T)) && isImplicitlyConvertible!(ElementType!R, T))

2
tests/tanya/container/tests/array.d
View File

@ -136,7 +136,7 @@ import tanya.test.stub;
} }
// const constructor tests // const constructor tests
@nogc nothrow pure @safe unittest @nogc nothrow pure @system unittest
{ {
auto v1 = const Array!int([1, 2, 3]); auto v1 = const Array!int([1, 2, 3]);
auto v2 = Array!int(v1); auto v2 = Array!int(v1);