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2a9a2dba4c
capacity and remove the workaround in SmallVector<T,0>. There are some theoretical benefits to a N->2N+1 growth policy anyway. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112870 91177308-0d34-0410-b5e6-96231b3b80d8
759 lines
23 KiB
C++
759 lines
23 KiB
C++
//===- llvm/ADT/SmallVector.h - 'Normally small' vectors --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the SmallVector class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ADT_SMALLVECTOR_H
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#define LLVM_ADT_SMALLVECTOR_H
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#include "llvm/Support/type_traits.h"
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#include <algorithm>
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#include <cassert>
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#include <cstddef>
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#include <cstdlib>
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#include <cstring>
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#include <memory>
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#ifdef _MSC_VER
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namespace std {
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#if _MSC_VER <= 1310
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// Work around flawed VC++ implementation of std::uninitialized_copy. Define
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// additional overloads so that elements with pointer types are recognized as
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// scalars and not objects, causing bizarre type conversion errors.
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template<class T1, class T2>
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inline _Scalar_ptr_iterator_tag _Ptr_cat(T1 **, T2 **) {
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_Scalar_ptr_iterator_tag _Cat;
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return _Cat;
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}
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template<class T1, class T2>
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inline _Scalar_ptr_iterator_tag _Ptr_cat(T1* const *, T2 **) {
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_Scalar_ptr_iterator_tag _Cat;
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return _Cat;
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}
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#else
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// FIXME: It is not clear if the problem is fixed in VS 2005. What is clear
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// is that the above hack won't work if it wasn't fixed.
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#endif
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}
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#endif
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namespace llvm {
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/// SmallVectorBase - This is all the non-templated stuff common to all
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/// SmallVectors.
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class SmallVectorBase {
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protected:
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void *BeginX, *EndX, *CapacityX;
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// Allocate raw space for N elements of type T. If T has a ctor or dtor, we
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// don't want it to be automatically run, so we need to represent the space as
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// something else. An array of char would work great, but might not be
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// aligned sufficiently. Instead, we either use GCC extensions, or some
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// number of union instances for the space, which guarantee maximal alignment.
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struct U {
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#ifdef __GNUC__
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char X __attribute__((aligned(8)));
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#else
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union {
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double D;
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long double LD;
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long long L;
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void *P;
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} X;
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#endif
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} FirstEl;
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// Space after 'FirstEl' is clobbered, do not add any instance vars after it.
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protected:
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SmallVectorBase(size_t Size)
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: BeginX(&FirstEl), EndX(&FirstEl), CapacityX((char*)&FirstEl+Size) {}
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/// isSmall - Return true if this is a smallvector which has not had dynamic
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/// memory allocated for it.
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bool isSmall() const {
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return BeginX == static_cast<const void*>(&FirstEl);
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}
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/// size_in_bytes - This returns size()*sizeof(T).
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size_t size_in_bytes() const {
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return size_t((char*)EndX - (char*)BeginX);
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}
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/// capacity_in_bytes - This returns capacity()*sizeof(T).
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size_t capacity_in_bytes() const {
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return size_t((char*)CapacityX - (char*)BeginX);
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}
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/// grow_pod - This is an implementation of the grow() method which only works
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/// on POD-like datatypes and is out of line to reduce code duplication.
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void grow_pod(size_t MinSizeInBytes, size_t TSize);
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public:
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bool empty() const { return BeginX == EndX; }
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};
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template <typename T>
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class SmallVectorTemplateCommon : public SmallVectorBase {
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protected:
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void setEnd(T *P) { this->EndX = P; }
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public:
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SmallVectorTemplateCommon(size_t Size) : SmallVectorBase(Size) {}
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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typedef T value_type;
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typedef T *iterator;
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typedef const T *const_iterator;
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typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
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typedef std::reverse_iterator<iterator> reverse_iterator;
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typedef T &reference;
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typedef const T &const_reference;
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typedef T *pointer;
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typedef const T *const_pointer;
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// forward iterator creation methods.
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iterator begin() { return (iterator)this->BeginX; }
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const_iterator begin() const { return (const_iterator)this->BeginX; }
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iterator end() { return (iterator)this->EndX; }
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const_iterator end() const { return (const_iterator)this->EndX; }
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protected:
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iterator capacity_ptr() { return (iterator)this->CapacityX; }
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const_iterator capacity_ptr() const { return (const_iterator)this->CapacityX;}
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public:
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// reverse iterator creation methods.
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reverse_iterator rbegin() { return reverse_iterator(end()); }
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const_reverse_iterator rbegin() const{ return const_reverse_iterator(end()); }
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reverse_iterator rend() { return reverse_iterator(begin()); }
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const_reverse_iterator rend() const { return const_reverse_iterator(begin());}
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size_type size() const { return end()-begin(); }
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size_type max_size() const { return size_type(-1) / sizeof(T); }
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/// capacity - Return the total number of elements in the currently allocated
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/// buffer.
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size_t capacity() const { return capacity_ptr() - begin(); }
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/// data - Return a pointer to the vector's buffer, even if empty().
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pointer data() { return pointer(begin()); }
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/// data - Return a pointer to the vector's buffer, even if empty().
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const_pointer data() const { return const_pointer(begin()); }
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reference operator[](unsigned idx) {
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assert(begin() + idx < end());
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return begin()[idx];
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}
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const_reference operator[](unsigned idx) const {
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assert(begin() + idx < end());
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return begin()[idx];
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}
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reference front() {
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return begin()[0];
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}
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const_reference front() const {
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return begin()[0];
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}
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reference back() {
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return end()[-1];
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}
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const_reference back() const {
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return end()[-1];
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}
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};
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/// SmallVectorTemplateBase<isPodLike = false> - This is where we put method
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/// implementations that are designed to work with non-POD-like T's.
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template <typename T, bool isPodLike>
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class SmallVectorTemplateBase : public SmallVectorTemplateCommon<T> {
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public:
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SmallVectorTemplateBase(size_t Size) : SmallVectorTemplateCommon<T>(Size) {}
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static void destroy_range(T *S, T *E) {
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while (S != E) {
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--E;
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E->~T();
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}
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}
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/// uninitialized_copy - Copy the range [I, E) onto the uninitialized memory
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/// starting with "Dest", constructing elements into it as needed.
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template<typename It1, typename It2>
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static void uninitialized_copy(It1 I, It1 E, It2 Dest) {
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std::uninitialized_copy(I, E, Dest);
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}
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/// grow - double the size of the allocated memory, guaranteeing space for at
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/// least one more element or MinSize if specified.
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void grow(size_t MinSize = 0);
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};
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// Define this out-of-line to dissuade the C++ compiler from inlining it.
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template <typename T, bool isPodLike>
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void SmallVectorTemplateBase<T, isPodLike>::grow(size_t MinSize) {
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size_t CurCapacity = this->capacity();
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size_t CurSize = this->size();
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size_t NewCapacity = 2*CurCapacity + 1; // Always grow, even from zero.
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if (NewCapacity < MinSize)
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NewCapacity = MinSize;
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T *NewElts = static_cast<T*>(malloc(NewCapacity*sizeof(T)));
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// Copy the elements over.
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this->uninitialized_copy(this->begin(), this->end(), NewElts);
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// Destroy the original elements.
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destroy_range(this->begin(), this->end());
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// If this wasn't grown from the inline copy, deallocate the old space.
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if (!this->isSmall())
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free(this->begin());
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this->setEnd(NewElts+CurSize);
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this->BeginX = NewElts;
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this->CapacityX = this->begin()+NewCapacity;
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}
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/// SmallVectorTemplateBase<isPodLike = true> - This is where we put method
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/// implementations that are designed to work with POD-like T's.
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template <typename T>
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class SmallVectorTemplateBase<T, true> : public SmallVectorTemplateCommon<T> {
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public:
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SmallVectorTemplateBase(size_t Size) : SmallVectorTemplateCommon<T>(Size) {}
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// No need to do a destroy loop for POD's.
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static void destroy_range(T *, T *) {}
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/// uninitialized_copy - Copy the range [I, E) onto the uninitialized memory
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/// starting with "Dest", constructing elements into it as needed.
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template<typename It1, typename It2>
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static void uninitialized_copy(It1 I, It1 E, It2 Dest) {
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// Arbitrary iterator types; just use the basic implementation.
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std::uninitialized_copy(I, E, Dest);
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}
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/// uninitialized_copy - Copy the range [I, E) onto the uninitialized memory
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/// starting with "Dest", constructing elements into it as needed.
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template<typename T1, typename T2>
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static void uninitialized_copy(T1 *I, T1 *E, T2 *Dest) {
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// Use memcpy for PODs iterated by pointers (which includes SmallVector
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// iterators): std::uninitialized_copy optimizes to memmove, but we can
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// use memcpy here.
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memcpy(Dest, I, (E-I)*sizeof(T));
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}
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/// grow - double the size of the allocated memory, guaranteeing space for at
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/// least one more element or MinSize if specified.
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void grow(size_t MinSize = 0) {
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this->grow_pod(MinSize*sizeof(T), sizeof(T));
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}
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};
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/// SmallVectorImpl - This class consists of common code factored out of the
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/// SmallVector class to reduce code duplication based on the SmallVector 'N'
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/// template parameter.
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template <typename T>
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class SmallVectorImpl : public SmallVectorTemplateBase<T, isPodLike<T>::value> {
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typedef SmallVectorTemplateBase<T, isPodLike<T>::value > SuperClass;
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SmallVectorImpl(const SmallVectorImpl&); // DISABLED.
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public:
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typedef typename SuperClass::iterator iterator;
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typedef typename SuperClass::size_type size_type;
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// Default ctor - Initialize to empty.
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explicit SmallVectorImpl(unsigned N)
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: SmallVectorTemplateBase<T, isPodLike<T>::value>(N*sizeof(T)) {
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}
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~SmallVectorImpl() {
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// Destroy the constructed elements in the vector.
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this->destroy_range(this->begin(), this->end());
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// If this wasn't grown from the inline copy, deallocate the old space.
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if (!this->isSmall())
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free(this->begin());
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}
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void clear() {
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this->destroy_range(this->begin(), this->end());
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this->EndX = this->BeginX;
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}
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void resize(unsigned N) {
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if (N < this->size()) {
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this->destroy_range(this->begin()+N, this->end());
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this->setEnd(this->begin()+N);
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} else if (N > this->size()) {
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if (this->capacity() < N)
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this->grow(N);
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this->construct_range(this->end(), this->begin()+N, T());
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this->setEnd(this->begin()+N);
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}
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}
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void resize(unsigned N, const T &NV) {
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if (N < this->size()) {
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this->destroy_range(this->begin()+N, this->end());
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this->setEnd(this->begin()+N);
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} else if (N > this->size()) {
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if (this->capacity() < N)
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this->grow(N);
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construct_range(this->end(), this->begin()+N, NV);
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this->setEnd(this->begin()+N);
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}
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}
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void reserve(unsigned N) {
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if (this->capacity() < N)
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this->grow(N);
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}
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void push_back(const T &Elt) {
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if (this->EndX < this->CapacityX) {
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Retry:
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new (this->end()) T(Elt);
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this->setEnd(this->end()+1);
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return;
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}
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this->grow();
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goto Retry;
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}
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void pop_back() {
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this->setEnd(this->end()-1);
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this->end()->~T();
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}
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T pop_back_val() {
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T Result = this->back();
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pop_back();
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return Result;
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}
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void swap(SmallVectorImpl &RHS);
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/// append - Add the specified range to the end of the SmallVector.
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///
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template<typename in_iter>
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void append(in_iter in_start, in_iter in_end) {
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size_type NumInputs = std::distance(in_start, in_end);
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// Grow allocated space if needed.
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if (NumInputs > size_type(this->capacity_ptr()-this->end()))
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this->grow(this->size()+NumInputs);
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// Copy the new elements over.
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// TODO: NEED To compile time dispatch on whether in_iter is a random access
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// iterator to use the fast uninitialized_copy.
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std::uninitialized_copy(in_start, in_end, this->end());
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this->setEnd(this->end() + NumInputs);
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}
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/// append - Add the specified range to the end of the SmallVector.
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///
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void append(size_type NumInputs, const T &Elt) {
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// Grow allocated space if needed.
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if (NumInputs > size_type(this->capacity_ptr()-this->end()))
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this->grow(this->size()+NumInputs);
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// Copy the new elements over.
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std::uninitialized_fill_n(this->end(), NumInputs, Elt);
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this->setEnd(this->end() + NumInputs);
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}
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void assign(unsigned NumElts, const T &Elt) {
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clear();
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if (this->capacity() < NumElts)
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this->grow(NumElts);
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this->setEnd(this->begin()+NumElts);
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construct_range(this->begin(), this->end(), Elt);
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}
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iterator erase(iterator I) {
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iterator N = I;
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// Shift all elts down one.
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std::copy(I+1, this->end(), I);
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// Drop the last elt.
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pop_back();
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return(N);
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}
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iterator erase(iterator S, iterator E) {
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iterator N = S;
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// Shift all elts down.
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iterator I = std::copy(E, this->end(), S);
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// Drop the last elts.
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this->destroy_range(I, this->end());
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this->setEnd(I);
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return(N);
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}
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iterator insert(iterator I, const T &Elt) {
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if (I == this->end()) { // Important special case for empty vector.
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push_back(Elt);
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return this->end()-1;
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}
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if (this->EndX < this->CapacityX) {
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Retry:
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new (this->end()) T(this->back());
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this->setEnd(this->end()+1);
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// Push everything else over.
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std::copy_backward(I, this->end()-1, this->end());
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*I = Elt;
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return I;
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}
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size_t EltNo = I-this->begin();
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this->grow();
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I = this->begin()+EltNo;
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goto Retry;
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}
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iterator insert(iterator I, size_type NumToInsert, const T &Elt) {
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if (I == this->end()) { // Important special case for empty vector.
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append(NumToInsert, Elt);
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return this->end()-1;
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}
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// Convert iterator to elt# to avoid invalidating iterator when we reserve()
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size_t InsertElt = I - this->begin();
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// Ensure there is enough space.
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reserve(static_cast<unsigned>(this->size() + NumToInsert));
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// Uninvalidate the iterator.
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I = this->begin()+InsertElt;
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// If there are more elements between the insertion point and the end of the
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// range than there are being inserted, we can use a simple approach to
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// insertion. Since we already reserved space, we know that this won't
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// reallocate the vector.
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if (size_t(this->end()-I) >= NumToInsert) {
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T *OldEnd = this->end();
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append(this->end()-NumToInsert, this->end());
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// Copy the existing elements that get replaced.
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std::copy_backward(I, OldEnd-NumToInsert, OldEnd);
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std::fill_n(I, NumToInsert, Elt);
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return I;
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}
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// Otherwise, we're inserting more elements than exist already, and we're
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// not inserting at the end.
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// Copy over the elements that we're about to overwrite.
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T *OldEnd = this->end();
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this->setEnd(this->end() + NumToInsert);
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size_t NumOverwritten = OldEnd-I;
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this->uninitialized_copy(I, OldEnd, this->end()-NumOverwritten);
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// Replace the overwritten part.
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std::fill_n(I, NumOverwritten, Elt);
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// Insert the non-overwritten middle part.
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std::uninitialized_fill_n(OldEnd, NumToInsert-NumOverwritten, Elt);
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return I;
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}
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template<typename ItTy>
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iterator insert(iterator I, ItTy From, ItTy To) {
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if (I == this->end()) { // Important special case for empty vector.
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append(From, To);
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return this->end()-1;
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}
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size_t NumToInsert = std::distance(From, To);
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// Convert iterator to elt# to avoid invalidating iterator when we reserve()
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size_t InsertElt = I - this->begin();
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// Ensure there is enough space.
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reserve(static_cast<unsigned>(this->size() + NumToInsert));
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// Uninvalidate the iterator.
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I = this->begin()+InsertElt;
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// If there are more elements between the insertion point and the end of the
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// range than there are being inserted, we can use a simple approach to
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// insertion. Since we already reserved space, we know that this won't
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// reallocate the vector.
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if (size_t(this->end()-I) >= NumToInsert) {
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T *OldEnd = this->end();
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append(this->end()-NumToInsert, this->end());
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// Copy the existing elements that get replaced.
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std::copy_backward(I, OldEnd-NumToInsert, OldEnd);
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std::copy(From, To, I);
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return I;
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}
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|
// Otherwise, we're inserting more elements than exist already, and we're
|
|
// not inserting at the end.
|
|
|
|
// Copy over the elements that we're about to overwrite.
|
|
T *OldEnd = this->end();
|
|
this->setEnd(this->end() + NumToInsert);
|
|
size_t NumOverwritten = OldEnd-I;
|
|
this->uninitialized_copy(I, OldEnd, this->end()-NumOverwritten);
|
|
|
|
// Replace the overwritten part.
|
|
for (; NumOverwritten > 0; --NumOverwritten) {
|
|
*I = *From;
|
|
++I; ++From;
|
|
}
|
|
|
|
// Insert the non-overwritten middle part.
|
|
this->uninitialized_copy(From, To, OldEnd);
|
|
return I;
|
|
}
|
|
|
|
const SmallVectorImpl
|
|
&operator=(const SmallVectorImpl &RHS);
|
|
|
|
bool operator==(const SmallVectorImpl &RHS) const {
|
|
if (this->size() != RHS.size()) return false;
|
|
return std::equal(this->begin(), this->end(), RHS.begin());
|
|
}
|
|
bool operator!=(const SmallVectorImpl &RHS) const {
|
|
return !(*this == RHS);
|
|
}
|
|
|
|
bool operator<(const SmallVectorImpl &RHS) const {
|
|
return std::lexicographical_compare(this->begin(), this->end(),
|
|
RHS.begin(), RHS.end());
|
|
}
|
|
|
|
/// set_size - Set the array size to \arg N, which the current array must have
|
|
/// enough capacity for.
|
|
///
|
|
/// This does not construct or destroy any elements in the vector.
|
|
///
|
|
/// Clients can use this in conjunction with capacity() to write past the end
|
|
/// of the buffer when they know that more elements are available, and only
|
|
/// update the size later. This avoids the cost of value initializing elements
|
|
/// which will only be overwritten.
|
|
void set_size(unsigned N) {
|
|
assert(N <= this->capacity());
|
|
this->setEnd(this->begin() + N);
|
|
}
|
|
|
|
private:
|
|
static void construct_range(T *S, T *E, const T &Elt) {
|
|
for (; S != E; ++S)
|
|
new (S) T(Elt);
|
|
}
|
|
};
|
|
|
|
|
|
template <typename T>
|
|
void SmallVectorImpl<T>::swap(SmallVectorImpl<T> &RHS) {
|
|
if (this == &RHS) return;
|
|
|
|
// We can only avoid copying elements if neither vector is small.
|
|
if (!this->isSmall() && !RHS.isSmall()) {
|
|
std::swap(this->BeginX, RHS.BeginX);
|
|
std::swap(this->EndX, RHS.EndX);
|
|
std::swap(this->CapacityX, RHS.CapacityX);
|
|
return;
|
|
}
|
|
if (RHS.size() > this->capacity())
|
|
this->grow(RHS.size());
|
|
if (this->size() > RHS.capacity())
|
|
RHS.grow(this->size());
|
|
|
|
// Swap the shared elements.
|
|
size_t NumShared = this->size();
|
|
if (NumShared > RHS.size()) NumShared = RHS.size();
|
|
for (unsigned i = 0; i != static_cast<unsigned>(NumShared); ++i)
|
|
std::swap((*this)[i], RHS[i]);
|
|
|
|
// Copy over the extra elts.
|
|
if (this->size() > RHS.size()) {
|
|
size_t EltDiff = this->size() - RHS.size();
|
|
this->uninitialized_copy(this->begin()+NumShared, this->end(), RHS.end());
|
|
RHS.setEnd(RHS.end()+EltDiff);
|
|
this->destroy_range(this->begin()+NumShared, this->end());
|
|
this->setEnd(this->begin()+NumShared);
|
|
} else if (RHS.size() > this->size()) {
|
|
size_t EltDiff = RHS.size() - this->size();
|
|
this->uninitialized_copy(RHS.begin()+NumShared, RHS.end(), this->end());
|
|
this->setEnd(this->end() + EltDiff);
|
|
this->destroy_range(RHS.begin()+NumShared, RHS.end());
|
|
RHS.setEnd(RHS.begin()+NumShared);
|
|
}
|
|
}
|
|
|
|
template <typename T>
|
|
const SmallVectorImpl<T> &SmallVectorImpl<T>::
|
|
operator=(const SmallVectorImpl<T> &RHS) {
|
|
// Avoid self-assignment.
|
|
if (this == &RHS) return *this;
|
|
|
|
// If we already have sufficient space, assign the common elements, then
|
|
// destroy any excess.
|
|
size_t RHSSize = RHS.size();
|
|
size_t CurSize = this->size();
|
|
if (CurSize >= RHSSize) {
|
|
// Assign common elements.
|
|
iterator NewEnd;
|
|
if (RHSSize)
|
|
NewEnd = std::copy(RHS.begin(), RHS.begin()+RHSSize, this->begin());
|
|
else
|
|
NewEnd = this->begin();
|
|
|
|
// Destroy excess elements.
|
|
this->destroy_range(NewEnd, this->end());
|
|
|
|
// Trim.
|
|
this->setEnd(NewEnd);
|
|
return *this;
|
|
}
|
|
|
|
// If we have to grow to have enough elements, destroy the current elements.
|
|
// This allows us to avoid copying them during the grow.
|
|
if (this->capacity() < RHSSize) {
|
|
// Destroy current elements.
|
|
this->destroy_range(this->begin(), this->end());
|
|
this->setEnd(this->begin());
|
|
CurSize = 0;
|
|
this->grow(RHSSize);
|
|
} else if (CurSize) {
|
|
// Otherwise, use assignment for the already-constructed elements.
|
|
std::copy(RHS.begin(), RHS.begin()+CurSize, this->begin());
|
|
}
|
|
|
|
// Copy construct the new elements in place.
|
|
this->uninitialized_copy(RHS.begin()+CurSize, RHS.end(),
|
|
this->begin()+CurSize);
|
|
|
|
// Set end.
|
|
this->setEnd(this->begin()+RHSSize);
|
|
return *this;
|
|
}
|
|
|
|
|
|
/// SmallVector - This is a 'vector' (really, a variable-sized array), optimized
|
|
/// for the case when the array is small. It contains some number of elements
|
|
/// in-place, which allows it to avoid heap allocation when the actual number of
|
|
/// elements is below that threshold. This allows normal "small" cases to be
|
|
/// fast without losing generality for large inputs.
|
|
///
|
|
/// Note that this does not attempt to be exception safe.
|
|
///
|
|
template <typename T, unsigned N>
|
|
class SmallVector : public SmallVectorImpl<T> {
|
|
/// InlineElts - These are 'N-1' elements that are stored inline in the body
|
|
/// of the vector. The extra '1' element is stored in SmallVectorImpl.
|
|
typedef typename SmallVectorImpl<T>::U U;
|
|
enum {
|
|
// MinUs - The number of U's require to cover N T's.
|
|
MinUs = (static_cast<unsigned int>(sizeof(T))*N +
|
|
static_cast<unsigned int>(sizeof(U)) - 1) /
|
|
static_cast<unsigned int>(sizeof(U)),
|
|
|
|
// NumInlineEltsElts - The number of elements actually in this array. There
|
|
// is already one in the parent class, and we have to round up to avoid
|
|
// having a zero-element array.
|
|
NumInlineEltsElts = MinUs > 1 ? (MinUs - 1) : 1,
|
|
|
|
// NumTsAvailable - The number of T's we actually have space for, which may
|
|
// be more than N due to rounding.
|
|
NumTsAvailable = (NumInlineEltsElts+1)*static_cast<unsigned int>(sizeof(U))/
|
|
static_cast<unsigned int>(sizeof(T))
|
|
};
|
|
U InlineElts[NumInlineEltsElts];
|
|
public:
|
|
SmallVector() : SmallVectorImpl<T>(NumTsAvailable) {
|
|
}
|
|
|
|
explicit SmallVector(unsigned Size, const T &Value = T())
|
|
: SmallVectorImpl<T>(NumTsAvailable) {
|
|
this->reserve(Size);
|
|
while (Size--)
|
|
this->push_back(Value);
|
|
}
|
|
|
|
template<typename ItTy>
|
|
SmallVector(ItTy S, ItTy E) : SmallVectorImpl<T>(NumTsAvailable) {
|
|
this->append(S, E);
|
|
}
|
|
|
|
SmallVector(const SmallVector &RHS) : SmallVectorImpl<T>(NumTsAvailable) {
|
|
if (!RHS.empty())
|
|
SmallVectorImpl<T>::operator=(RHS);
|
|
}
|
|
|
|
const SmallVector &operator=(const SmallVector &RHS) {
|
|
SmallVectorImpl<T>::operator=(RHS);
|
|
return *this;
|
|
}
|
|
|
|
};
|
|
|
|
/// Specialize SmallVector at N=0. This specialization guarantees
|
|
/// that it can be instantiated at an incomplete T if none of its
|
|
/// members are required.
|
|
template <typename T>
|
|
class SmallVector<T,0> : public SmallVectorImpl<T> {
|
|
public:
|
|
SmallVector() : SmallVectorImpl<T>(0) {}
|
|
|
|
explicit SmallVector(unsigned Size, const T &Value = T())
|
|
: SmallVectorImpl<T>(0) {
|
|
this->reserve(Size);
|
|
while (Size--)
|
|
this->push_back(Value);
|
|
}
|
|
|
|
template<typename ItTy>
|
|
SmallVector(ItTy S, ItTy E) : SmallVectorImpl<T>(0) {
|
|
this->append(S, E);
|
|
}
|
|
|
|
SmallVector(const SmallVector &RHS) : SmallVectorImpl<T>(0) {
|
|
SmallVectorImpl<T>::operator=(RHS);
|
|
}
|
|
|
|
SmallVector &operator=(const SmallVectorImpl<T> &RHS) {
|
|
return SmallVectorImpl<T>::operator=(RHS);
|
|
}
|
|
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
namespace std {
|
|
/// Implement std::swap in terms of SmallVector swap.
|
|
template<typename T>
|
|
inline void
|
|
swap(llvm::SmallVectorImpl<T> &LHS, llvm::SmallVectorImpl<T> &RHS) {
|
|
LHS.swap(RHS);
|
|
}
|
|
|
|
/// Implement std::swap in terms of SmallVector swap.
|
|
template<typename T, unsigned N>
|
|
inline void
|
|
swap(llvm::SmallVector<T, N> &LHS, llvm::SmallVector<T, N> &RHS) {
|
|
LHS.swap(RHS);
|
|
}
|
|
}
|
|
|
|
#endif
|