ilist.h revision c23b8719ef9d6b1220e854b37d40e9e1c48a82bc
143d1fd449f1a0ac9d9dafa0b9569bb6b2e976198Anton Korobeynikov//==-- llvm/ADT/ilist.h - Intrusive Linked List Template ---------*- C++ -*-==// 2e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman// 3b2109ce97881269a610fa4afbcbca350e975174dJohn Criswell// The LLVM Compiler Infrastructure 4b2109ce97881269a610fa4afbcbca350e975174dJohn Criswell// 5234d529e582963ad4b5d83b911cd057fe99d1435Chris Lattner// This file is distributed under the University of Illinois Open Source 6234d529e582963ad4b5d83b911cd057fe99d1435Chris Lattner// License. See LICENSE.TXT for details. 7e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman// 8b2109ce97881269a610fa4afbcbca350e975174dJohn Criswell//===----------------------------------------------------------------------===// 97e70829632f82de15db187845666aaca6e04b792Chris Lattner// 107e70829632f82de15db187845666aaca6e04b792Chris Lattner// This file defines classes to implement an intrusive doubly linked list class 1147e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner// (i.e. each node of the list must contain a next and previous field for the 127e70829632f82de15db187845666aaca6e04b792Chris Lattner// list. 137e70829632f82de15db187845666aaca6e04b792Chris Lattner// 147e70829632f82de15db187845666aaca6e04b792Chris Lattner// The ilist_traits trait class is used to gain access to the next and previous 157e70829632f82de15db187845666aaca6e04b792Chris Lattner// fields of the node type that the list is instantiated with. If it is not 167e70829632f82de15db187845666aaca6e04b792Chris Lattner// specialized, the list defaults to using the getPrev(), getNext() method calls 177e70829632f82de15db187845666aaca6e04b792Chris Lattner// to get the next and previous pointers. 187e70829632f82de15db187845666aaca6e04b792Chris Lattner// 197e70829632f82de15db187845666aaca6e04b792Chris Lattner// The ilist class itself, should be a plug in replacement for list, assuming 207e70829632f82de15db187845666aaca6e04b792Chris Lattner// that the nodes contain next/prev pointers. This list replacement does not 21094aa6ce47f0f0604469e0a24bde131ce6326938Nick Lewycky// provide a constant time size() method, so be careful to use empty() when you 22a1cb4737b04a92f57b1b9dcd8a24c68db5035401Chris Lattner// really want to know if it's empty. 237e70829632f82de15db187845666aaca6e04b792Chris Lattner// 247e70829632f82de15db187845666aaca6e04b792Chris Lattner// The ilist class is implemented by allocating a 'tail' node when the list is 2547e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner// created (using ilist_traits<>::createSentinel()). This tail node is 267e70829632f82de15db187845666aaca6e04b792Chris Lattner// absolutely required because the user must be able to compute end()-1. Because 277e70829632f82de15db187845666aaca6e04b792Chris Lattner// of this, users of the direct next/prev links will see an extra link on the 287e70829632f82de15db187845666aaca6e04b792Chris Lattner// end of the list, which should be ignored. 297e70829632f82de15db187845666aaca6e04b792Chris Lattner// 307e70829632f82de15db187845666aaca6e04b792Chris Lattner// Requirements for a user of this list: 317e70829632f82de15db187845666aaca6e04b792Chris Lattner// 327e70829632f82de15db187845666aaca6e04b792Chris Lattner// 1. The user must provide {g|s}et{Next|Prev} methods, or specialize 337e70829632f82de15db187845666aaca6e04b792Chris Lattner// ilist_traits to provide an alternate way of getting and setting next and 347e70829632f82de15db187845666aaca6e04b792Chris Lattner// prev links. 357e70829632f82de15db187845666aaca6e04b792Chris Lattner// 367e70829632f82de15db187845666aaca6e04b792Chris Lattner//===----------------------------------------------------------------------===// 377e70829632f82de15db187845666aaca6e04b792Chris Lattner 381ff4ed726bb8526d1e49030245365f8c86a8bb49Anton Korobeynikov#ifndef LLVM_ADT_ILIST_H 391ff4ed726bb8526d1e49030245365f8c86a8bb49Anton Korobeynikov#define LLVM_ADT_ILIST_H 407e70829632f82de15db187845666aaca6e04b792Chris Lattner 4143d1fd449f1a0ac9d9dafa0b9569bb6b2e976198Anton Korobeynikov#include "llvm/ADT/iterator.h" 42803f03e217ec25cf71b2b6dea65da2e377527b6bChris Lattner#include <cassert> 437e70829632f82de15db187845666aaca6e04b792Chris Lattner 44d0fde30ce850b78371fd1386338350591f9ff494Brian Gaekenamespace llvm { 45d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 467e70829632f82de15db187845666aaca6e04b792Chris Lattnertemplate<typename NodeTy, typename Traits> class iplist; 477e70829632f82de15db187845666aaca6e04b792Chris Lattnertemplate<typename NodeTy> class ilist_iterator; 487e70829632f82de15db187845666aaca6e04b792Chris Lattner 49fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman/// ilist_nextprev_traits - A fragment for template traits for intrusive list 50fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman/// that provides default next/prev implementations for common operations. 51fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman/// 527e70829632f82de15db187845666aaca6e04b792Chris Lattnertemplate<typename NodeTy> 53fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanstruct ilist_nextprev_traits { 547e70829632f82de15db187845666aaca6e04b792Chris Lattner static NodeTy *getPrev(NodeTy *N) { return N->getPrev(); } 557e70829632f82de15db187845666aaca6e04b792Chris Lattner static NodeTy *getNext(NodeTy *N) { return N->getNext(); } 567e70829632f82de15db187845666aaca6e04b792Chris Lattner static const NodeTy *getPrev(const NodeTy *N) { return N->getPrev(); } 577e70829632f82de15db187845666aaca6e04b792Chris Lattner static const NodeTy *getNext(const NodeTy *N) { return N->getNext(); } 587e70829632f82de15db187845666aaca6e04b792Chris Lattner 597e70829632f82de15db187845666aaca6e04b792Chris Lattner static void setPrev(NodeTy *N, NodeTy *Prev) { N->setPrev(Prev); } 607e70829632f82de15db187845666aaca6e04b792Chris Lattner static void setNext(NodeTy *N, NodeTy *Next) { N->setNext(Next); } 61fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman}; 627e70829632f82de15db187845666aaca6e04b792Chris Lattner 63c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greiftemplate<typename NodeTy> 64c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greifstruct ilist_traits; 65c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif 66fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman/// ilist_sentinel_traits - A fragment for template traits for intrusive list 67fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman/// that provides default sentinel implementations for common operations. 68fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman/// 69c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif/// ilist_sentinel_traits implements a lazy dynamic sentinel allocation 70c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif/// strategy. The sentinel is stored in the prev field of ilist's Head. 71c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif/// 72fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmantemplate<typename NodeTy> 73fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanstruct ilist_sentinel_traits { 74c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif /// createSentinel - create the dynamic sentinel 75bca81448ac8e19c588c9a4ad16fc70732b76327cChris Lattner static NodeTy *createSentinel() { return new NodeTy(); } 76c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif 77c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif /// destroySentinel - deallocate the dynamic sentinel 78bca81448ac8e19c588c9a4ad16fc70732b76327cChris Lattner static void destroySentinel(NodeTy *N) { delete N; } 79c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif 80c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif /// provideInitialHead - when constructing an ilist, provide a starting 81c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif /// value for its Head 82c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif /// @return null node to indicate that it needs to be allocated later 83c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif static NodeTy *provideInitialHead() { return 0; } 84c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif 85c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif /// ensureHead - make sure that Head is either already 86c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif /// initialized or assigned a fresh sentinel 87c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif /// @return the sentinel 88c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif static NodeTy *ensureHead(NodeTy *&Head) { 89c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif if (!Head) { 90c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif Head = ilist_traits<NodeTy>::createSentinel(); 91c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif ilist_traits<NodeTy>::noteHead(Head, Head); 92c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif ilist_traits<NodeTy>::setNext(Head, 0); 93c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif return Head; 94c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif } 95c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif return ilist_traits<NodeTy>::getPrev(Head); 96c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif } 97c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif 98c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif /// noteHead - stash the sentinel into its default location 99c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif static void noteHead(NodeTy *NewHead, NodeTy *Sentinel) { 100c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif ilist_traits<NodeTy>::setPrev(NewHead, Sentinel); 101c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif } 102fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman}; 103fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman 104b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif/// ilist_node_traits - A fragment for template traits for intrusive list 105b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif/// that provides default node related operations. 106fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman/// 107fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmantemplate<typename NodeTy> 108b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greifstruct ilist_node_traits { 109fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman static NodeTy *createNode(const NodeTy &V) { return new NodeTy(V); } 110fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman static void deleteNode(NodeTy *V) { delete V; } 1117e70829632f82de15db187845666aaca6e04b792Chris Lattner 112eb4ab60bed82d15651bf77ae68ad266ec0eeae9dBill Wendling void addNodeToList(NodeTy *) {} 113eb4ab60bed82d15651bf77ae68ad266ec0eeae9dBill Wendling void removeNodeFromList(NodeTy *) {} 114b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif void transferNodesFromList(ilist_node_traits & /*SrcTraits*/, 115eb4ab60bed82d15651bf77ae68ad266ec0eeae9dBill Wendling ilist_iterator<NodeTy> /*first*/, 116eb4ab60bed82d15651bf77ae68ad266ec0eeae9dBill Wendling ilist_iterator<NodeTy> /*last*/) {} 1177e70829632f82de15db187845666aaca6e04b792Chris Lattner}; 1187e70829632f82de15db187845666aaca6e04b792Chris Lattner 119b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif/// ilist_default_traits - Default template traits for intrusive list. 120b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif/// By inheriting from this, you can easily use default implementations 121b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif/// for all common operations. 122b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif/// 123b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greiftemplate<typename NodeTy> 124b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greifstruct ilist_default_traits : ilist_nextprev_traits<NodeTy>, 125b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif ilist_sentinel_traits<NodeTy>, 126b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif ilist_node_traits<NodeTy> { 127b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif}; 128b141e397d52d9946e93f84c65c6b2e653b026041Gabor Greif 129fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman// Template traits for intrusive list. By specializing this template class, you 130fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman// can change what next/prev fields are used to store the links... 131fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmantemplate<typename NodeTy> 132fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanstruct ilist_traits : ilist_default_traits<NodeTy> {}; 133fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman 1347e70829632f82de15db187845666aaca6e04b792Chris Lattner// Const traits are the same as nonconst traits... 1357e70829632f82de15db187845666aaca6e04b792Chris Lattnertemplate<typename Ty> 1367e70829632f82de15db187845666aaca6e04b792Chris Lattnerstruct ilist_traits<const Ty> : public ilist_traits<Ty> {}; 1377e70829632f82de15db187845666aaca6e04b792Chris Lattner 1387e70829632f82de15db187845666aaca6e04b792Chris Lattner//===----------------------------------------------------------------------===// 1397e70829632f82de15db187845666aaca6e04b792Chris Lattner// ilist_iterator<Node> - Iterator for intrusive list. 1407e70829632f82de15db187845666aaca6e04b792Chris Lattner// 1417e70829632f82de15db187845666aaca6e04b792Chris Lattnertemplate<typename NodeTy> 142a1cb4737b04a92f57b1b9dcd8a24c68db5035401Chris Lattnerclass ilist_iterator 1430d219edad2fd5e7b400ecd49ac833a7a3199af60Chris Lattner : public bidirectional_iterator<NodeTy, ptrdiff_t> { 144e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman 145ccaa6540fc2866ab36f6ebecf6df101f613f8aa7Ted Kremenekpublic: 1467e70829632f82de15db187845666aaca6e04b792Chris Lattner typedef ilist_traits<NodeTy> Traits; 1470d219edad2fd5e7b400ecd49ac833a7a3199af60Chris Lattner typedef bidirectional_iterator<NodeTy, ptrdiff_t> super; 148a1cb4737b04a92f57b1b9dcd8a24c68db5035401Chris Lattner 1492c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman typedef typename super::value_type value_type; 1502c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman typedef typename super::difference_type difference_type; 151a1cb4737b04a92f57b1b9dcd8a24c68db5035401Chris Lattner typedef typename super::pointer pointer; 152a1cb4737b04a92f57b1b9dcd8a24c68db5035401Chris Lattner typedef typename super::reference reference; 15332862da7c7107d792d25a885f9bd2d0402ae7126Chris Lattnerprivate: 1547e70829632f82de15db187845666aaca6e04b792Chris Lattner pointer NodePtr; 155066075030ad46b3494480a5f79f05443f947aca7Nick Lewycky 1562c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman // ilist_iterator is not a random-access iterator, but it has an 1572c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman // implicit conversion to pointer-type, which is. Declare (but 1582c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman // don't define) these functions as private to help catch 1592c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman // accidental misuse. 1602c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman void operator[](difference_type) const; 1612c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman void operator+(difference_type) const; 1622c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman void operator-(difference_type) const; 1632c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman void operator+=(difference_type) const; 1642c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman void operator-=(difference_type) const; 1652c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman template<class T> void operator<(T) const; 1662c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman template<class T> void operator<=(T) const; 1672c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman template<class T> void operator>(T) const; 1682c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman template<class T> void operator>=(T) const; 1692c8a1522dbe6f14b728e83b9c555bef27233cc91Dan Gohman template<class T> void operator-(T) const; 1707e70829632f82de15db187845666aaca6e04b792Chris Lattnerpublic: 1717e70829632f82de15db187845666aaca6e04b792Chris Lattner 1727e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist_iterator(pointer NP) : NodePtr(NP) {} 17333adbcc87d92c6c3e620870c804f4a2533ecc850Vikram S. Adve ilist_iterator(reference NR) : NodePtr(&NR) {} 1747e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist_iterator() : NodePtr(0) {} 1757e70829632f82de15db187845666aaca6e04b792Chris Lattner 1767e70829632f82de15db187845666aaca6e04b792Chris Lattner // This is templated so that we can allow constructing a const iterator from 1777e70829632f82de15db187845666aaca6e04b792Chris Lattner // a nonconst iterator... 1787e70829632f82de15db187845666aaca6e04b792Chris Lattner template<class node_ty> 1797e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist_iterator(const ilist_iterator<node_ty> &RHS) 1807e70829632f82de15db187845666aaca6e04b792Chris Lattner : NodePtr(RHS.getNodePtrUnchecked()) {} 1817e70829632f82de15db187845666aaca6e04b792Chris Lattner 1827e70829632f82de15db187845666aaca6e04b792Chris Lattner // This is templated so that we can allow assigning to a const iterator from 1837e70829632f82de15db187845666aaca6e04b792Chris Lattner // a nonconst iterator... 1847e70829632f82de15db187845666aaca6e04b792Chris Lattner template<class node_ty> 1857e70829632f82de15db187845666aaca6e04b792Chris Lattner const ilist_iterator &operator=(const ilist_iterator<node_ty> &RHS) { 1867e70829632f82de15db187845666aaca6e04b792Chris Lattner NodePtr = RHS.getNodePtrUnchecked(); 1877e70829632f82de15db187845666aaca6e04b792Chris Lattner return *this; 1887e70829632f82de15db187845666aaca6e04b792Chris Lattner } 1897e70829632f82de15db187845666aaca6e04b792Chris Lattner 1907e70829632f82de15db187845666aaca6e04b792Chris Lattner // Accessors... 1917e70829632f82de15db187845666aaca6e04b792Chris Lattner operator pointer() const { 1927e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(Traits::getNext(NodePtr) != 0 && "Dereferencing end()!"); 1937e70829632f82de15db187845666aaca6e04b792Chris Lattner return NodePtr; 1947e70829632f82de15db187845666aaca6e04b792Chris Lattner } 1957e70829632f82de15db187845666aaca6e04b792Chris Lattner 1967e70829632f82de15db187845666aaca6e04b792Chris Lattner reference operator*() const { 1977e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(Traits::getNext(NodePtr) != 0 && "Dereferencing end()!"); 1987e70829632f82de15db187845666aaca6e04b792Chris Lattner return *NodePtr; 1997e70829632f82de15db187845666aaca6e04b792Chris Lattner } 200e14d81deeb6bb3404ffee5e59ecb88304f112f4aDan Gohman pointer operator->() const { return &operator*(); } 2017e70829632f82de15db187845666aaca6e04b792Chris Lattner 2027e70829632f82de15db187845666aaca6e04b792Chris Lattner // Comparison operators 2037e70829632f82de15db187845666aaca6e04b792Chris Lattner bool operator==(const ilist_iterator &RHS) const { 2047e70829632f82de15db187845666aaca6e04b792Chris Lattner return NodePtr == RHS.NodePtr; 2057e70829632f82de15db187845666aaca6e04b792Chris Lattner } 2067e70829632f82de15db187845666aaca6e04b792Chris Lattner bool operator!=(const ilist_iterator &RHS) const { 2077e70829632f82de15db187845666aaca6e04b792Chris Lattner return NodePtr != RHS.NodePtr; 2087e70829632f82de15db187845666aaca6e04b792Chris Lattner } 2097e70829632f82de15db187845666aaca6e04b792Chris Lattner 2107e70829632f82de15db187845666aaca6e04b792Chris Lattner // Increment and decrement operators... 2117e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist_iterator &operator--() { // predecrement - Back up 2127e70829632f82de15db187845666aaca6e04b792Chris Lattner NodePtr = Traits::getPrev(NodePtr); 21347e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner assert(Traits::getNext(NodePtr) && "--'d off the beginning of an ilist!"); 2147e70829632f82de15db187845666aaca6e04b792Chris Lattner return *this; 2157e70829632f82de15db187845666aaca6e04b792Chris Lattner } 2167e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist_iterator &operator++() { // preincrement - Advance 2177e70829632f82de15db187845666aaca6e04b792Chris Lattner NodePtr = Traits::getNext(NodePtr); 2187e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(NodePtr && "++'d off the end of an ilist!"); 2197e70829632f82de15db187845666aaca6e04b792Chris Lattner return *this; 2207e70829632f82de15db187845666aaca6e04b792Chris Lattner } 2217e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist_iterator operator--(int) { // postdecrement operators... 2227e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist_iterator tmp = *this; 2237e70829632f82de15db187845666aaca6e04b792Chris Lattner --*this; 2247e70829632f82de15db187845666aaca6e04b792Chris Lattner return tmp; 2257e70829632f82de15db187845666aaca6e04b792Chris Lattner } 2267e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist_iterator operator++(int) { // postincrement operators... 2277e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist_iterator tmp = *this; 2287e70829632f82de15db187845666aaca6e04b792Chris Lattner ++*this; 2297e70829632f82de15db187845666aaca6e04b792Chris Lattner return tmp; 2307e70829632f82de15db187845666aaca6e04b792Chris Lattner } 2317e70829632f82de15db187845666aaca6e04b792Chris Lattner 2322cca3008e86aa5448a629c744064daecb531bf94Chris Lattner // Internal interface, do not use... 2332cca3008e86aa5448a629c744064daecb531bf94Chris Lattner pointer getNodePtrUnchecked() const { return NodePtr; } 2342cca3008e86aa5448a629c744064daecb531bf94Chris Lattner}; 2352cca3008e86aa5448a629c744064daecb531bf94Chris Lattner 23671be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenos// do not implement. this is to catch errors when people try to use 23771be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenos// them as random access iterators 23871be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenostemplate<typename T> 23971be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenosvoid operator-(int, ilist_iterator<T>); 24071be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenostemplate<typename T> 24171be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenosvoid operator-(ilist_iterator<T>,int); 24271be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenos 24371be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenostemplate<typename T> 24471be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenosvoid operator+(int, ilist_iterator<T>); 24571be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenostemplate<typename T> 24671be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenosvoid operator+(ilist_iterator<T>,int); 24771be6db3efd233ae7eafe3e23ad9d9ac70bf0706Alkis Evlogimenos 248cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman// operator!=/operator== - Allow mixed comparisons without dereferencing 249cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman// the iterator, which could very likely be pointing to end(). 250cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begemantemplate<typename T> 251cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begemanbool operator!=(const T* LHS, const ilist_iterator<const T> &RHS) { 252cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman return LHS != RHS.getNodePtrUnchecked(); 253cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman} 254cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begemantemplate<typename T> 255cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begemanbool operator==(const T* LHS, const ilist_iterator<const T> &RHS) { 256cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman return LHS == RHS.getNodePtrUnchecked(); 257cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman} 258cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begemantemplate<typename T> 259cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begemanbool operator!=(T* LHS, const ilist_iterator<T> &RHS) { 260cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman return LHS != RHS.getNodePtrUnchecked(); 261cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman} 262cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begemantemplate<typename T> 263cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begemanbool operator==(T* LHS, const ilist_iterator<T> &RHS) { 264cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman return LHS == RHS.getNodePtrUnchecked(); 265cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman} 266cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman 267cb647519d34184fe41aa7e072076ae70634bc3d7Nate Begeman 268011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner// Allow ilist_iterators to convert into pointers to a node automatically when 269011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner// used by the dyn_cast, cast, isa mechanisms... 270011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner 271011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattnertemplate<typename From> struct simplify_type; 272011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner 273011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattnertemplate<typename NodeTy> struct simplify_type<ilist_iterator<NodeTy> > { 274011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner typedef NodeTy* SimpleType; 275e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman 276011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner static SimpleType getSimplifiedValue(const ilist_iterator<NodeTy> &Node) { 277011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner return &*Node; 278011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner } 279011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner}; 280011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattnertemplate<typename NodeTy> struct simplify_type<const ilist_iterator<NodeTy> > { 281011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner typedef NodeTy* SimpleType; 282e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman 283011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner static SimpleType getSimplifiedValue(const ilist_iterator<NodeTy> &Node) { 284011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner return &*Node; 285011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner } 286011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner}; 287011ce8d2e401855877803fb6d972a6f6c22242a5Chris Lattner 2887e70829632f82de15db187845666aaca6e04b792Chris Lattner 2897e70829632f82de15db187845666aaca6e04b792Chris Lattner//===----------------------------------------------------------------------===// 2907e70829632f82de15db187845666aaca6e04b792Chris Lattner// 2916de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// iplist - The subset of list functionality that can safely be used on nodes 2926de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// of polymorphic types, i.e. a heterogenous list with a common base class that 2936de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// holds the next/prev pointers. The only state of the list itself is a single 2946de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// pointer to the head of the list. 2956de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// 2966de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// This list can be in one of three interesting states: 2976de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// 1. The list may be completely unconstructed. In this case, the head 2986de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// pointer is null. When in this form, any query for an iterator (e.g. 2996de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// begin() or end()) causes the list to transparently change to state #2. 300e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman/// 2. The list may be empty, but contain a sentinel for the end iterator. This 301e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman/// sentinel is created by the Traits::createSentinel method and is a link 3026de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// in the list. When the list is empty, the pointer in the iplist points 303e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman/// to the sentinel. Once the sentinel is constructed, it 3046de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// is not destroyed until the list is. 3056de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// 3. The list may contain actual objects in it, which are stored as a doubly 3066de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// linked list of nodes. One invariant of the list is that the predecessor 3076de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// of the first node in the list always points to the last node in the list, 308e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman/// and the successor pointer for the sentinel (which always stays at the 309e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman/// end of the list) is always null. 3106de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner/// 3117e70829632f82de15db187845666aaca6e04b792Chris Lattnertemplate<typename NodeTy, typename Traits=ilist_traits<NodeTy> > 3127e70829632f82de15db187845666aaca6e04b792Chris Lattnerclass iplist : public Traits { 3136de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner mutable NodeTy *Head; 31447e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner 31547e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner // Use the prev node pointer of 'head' as the tail pointer. This is really a 31647e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner // circularly linked list where we snip the 'next' link from the sentinel node 31747e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner // back to the first node in the list (to preserve assertions about going off 31847e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner // the end of the list). 319c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif NodeTy *getTail() { return this->ensureHead(Head); } 320c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif const NodeTy *getTail() const { return this->ensureHead(Head); } 321c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif void setTail(NodeTy *N) const { this->noteHead(Head, N); } 322e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman 323e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman /// CreateLazySentinel - This method verifies whether the sentinel for the 3246de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner /// list has been created and lazily makes it if not. 325e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman void CreateLazySentinel() const { 326c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif this->Traits::ensureHead(Head); 3276de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner } 3287e70829632f82de15db187845666aaca6e04b792Chris Lattner 3297e70829632f82de15db187845666aaca6e04b792Chris Lattner static bool op_less(NodeTy &L, NodeTy &R) { return L < R; } 3307e70829632f82de15db187845666aaca6e04b792Chris Lattner static bool op_equal(NodeTy &L, NodeTy &R) { return L == R; } 3319ff0f0ea39ea71d33887584d10c88dda2038285bDan Gohman 3329ff0f0ea39ea71d33887584d10c88dda2038285bDan Gohman // No fundamental reason why iplist can't by copyable, but the default 3339ff0f0ea39ea71d33887584d10c88dda2038285bDan Gohman // copy/copy-assign won't do. 3349ff0f0ea39ea71d33887584d10c88dda2038285bDan Gohman iplist(const iplist &); // do not implement 3359ff0f0ea39ea71d33887584d10c88dda2038285bDan Gohman void operator=(const iplist &); // do not implement 3369ff0f0ea39ea71d33887584d10c88dda2038285bDan Gohman 3377e70829632f82de15db187845666aaca6e04b792Chris Lattnerpublic: 3387e70829632f82de15db187845666aaca6e04b792Chris Lattner typedef NodeTy *pointer; 3397e70829632f82de15db187845666aaca6e04b792Chris Lattner typedef const NodeTy *const_pointer; 3407e70829632f82de15db187845666aaca6e04b792Chris Lattner typedef NodeTy &reference; 3417e70829632f82de15db187845666aaca6e04b792Chris Lattner typedef const NodeTy &const_reference; 3427e70829632f82de15db187845666aaca6e04b792Chris Lattner typedef NodeTy value_type; 3437e70829632f82de15db187845666aaca6e04b792Chris Lattner typedef ilist_iterator<NodeTy> iterator; 3447e70829632f82de15db187845666aaca6e04b792Chris Lattner typedef ilist_iterator<const NodeTy> const_iterator; 3457e70829632f82de15db187845666aaca6e04b792Chris Lattner typedef size_t size_type; 3467e70829632f82de15db187845666aaca6e04b792Chris Lattner typedef ptrdiff_t difference_type; 3474a9f9337511441af0624e754ad9b2b1262ee584dAnand Shukla typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 3484a9f9337511441af0624e754ad9b2b1262ee584dAnand Shukla typedef std::reverse_iterator<iterator> reverse_iterator; 3497e70829632f82de15db187845666aaca6e04b792Chris Lattner 350c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif iplist() : Head(this->Traits::provideInitialHead()) {} 3516de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner ~iplist() { 3526de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner if (!Head) return; 3536de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner clear(); 3546de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner Traits::destroySentinel(getTail()); 3557e70829632f82de15db187845666aaca6e04b792Chris Lattner } 3567e70829632f82de15db187845666aaca6e04b792Chris Lattner 3572cca3008e86aa5448a629c744064daecb531bf94Chris Lattner // Iterator creation methods. 3586de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner iterator begin() { 359e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman CreateLazySentinel(); 360e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman return iterator(Head); 3616de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner } 3626de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner const_iterator begin() const { 363e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman CreateLazySentinel(); 3646de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner return const_iterator(Head); 3656de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner } 3666de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner iterator end() { 367e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman CreateLazySentinel(); 3686de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner return iterator(getTail()); 3696de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner } 3706de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner const_iterator end() const { 371e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman CreateLazySentinel(); 3726de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner return const_iterator(getTail()); 3736de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner } 3747e70829632f82de15db187845666aaca6e04b792Chris Lattner 3752cca3008e86aa5448a629c744064daecb531bf94Chris Lattner // reverse iterator creation methods. 3767e70829632f82de15db187845666aaca6e04b792Chris Lattner reverse_iterator rbegin() { return reverse_iterator(end()); } 3777e70829632f82de15db187845666aaca6e04b792Chris Lattner const_reverse_iterator rbegin() const{ return const_reverse_iterator(end()); } 3787e70829632f82de15db187845666aaca6e04b792Chris Lattner reverse_iterator rend() { return reverse_iterator(begin()); } 3796de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner const_reverse_iterator rend() const { return const_reverse_iterator(begin());} 3807e70829632f82de15db187845666aaca6e04b792Chris Lattner 3812cca3008e86aa5448a629c744064daecb531bf94Chris Lattner 3822cca3008e86aa5448a629c744064daecb531bf94Chris Lattner // Miscellaneous inspection routines. 3837e70829632f82de15db187845666aaca6e04b792Chris Lattner size_type max_size() const { return size_type(-1); } 3846de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner bool empty() const { return Head == 0 || Head == getTail(); } 3857e70829632f82de15db187845666aaca6e04b792Chris Lattner 3867e70829632f82de15db187845666aaca6e04b792Chris Lattner // Front and back accessor functions... 3877e70829632f82de15db187845666aaca6e04b792Chris Lattner reference front() { 3887e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(!empty() && "Called front() on empty list!"); 3897e70829632f82de15db187845666aaca6e04b792Chris Lattner return *Head; 3907e70829632f82de15db187845666aaca6e04b792Chris Lattner } 3917e70829632f82de15db187845666aaca6e04b792Chris Lattner const_reference front() const { 3927e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(!empty() && "Called front() on empty list!"); 3937e70829632f82de15db187845666aaca6e04b792Chris Lattner return *Head; 3947e70829632f82de15db187845666aaca6e04b792Chris Lattner } 3957e70829632f82de15db187845666aaca6e04b792Chris Lattner reference back() { 3967e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(!empty() && "Called back() on empty list!"); 397c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet return *this->getPrev(getTail()); 3987e70829632f82de15db187845666aaca6e04b792Chris Lattner } 3997e70829632f82de15db187845666aaca6e04b792Chris Lattner const_reference back() const { 4007e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(!empty() && "Called back() on empty list!"); 401c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet return *this->getPrev(getTail()); 4027e70829632f82de15db187845666aaca6e04b792Chris Lattner } 4037e70829632f82de15db187845666aaca6e04b792Chris Lattner 4047e70829632f82de15db187845666aaca6e04b792Chris Lattner void swap(iplist &RHS) { 405d68a07650cdb2e18f18f362ba533459aa10e01b6Dan Gohman assert(0 && "Swap does not use list traits callback correctly yet!"); 4067e70829632f82de15db187845666aaca6e04b792Chris Lattner std::swap(Head, RHS.Head); 4077e70829632f82de15db187845666aaca6e04b792Chris Lattner } 4087e70829632f82de15db187845666aaca6e04b792Chris Lattner 4097e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator insert(iterator where, NodeTy *New) { 410a2769a33c94f021a609a462b28ebea069eba6f74Misha Brukman NodeTy *CurNode = where.getNodePtrUnchecked(); 411a2769a33c94f021a609a462b28ebea069eba6f74Misha Brukman NodeTy *PrevNode = this->getPrev(CurNode); 412c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setNext(New, CurNode); 413c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setPrev(New, PrevNode); 4147e70829632f82de15db187845666aaca6e04b792Chris Lattner 41547e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner if (CurNode != Head) // Is PrevNode off the beginning of the list? 416c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setNext(PrevNode, New); 4177e70829632f82de15db187845666aaca6e04b792Chris Lattner else 4187e70829632f82de15db187845666aaca6e04b792Chris Lattner Head = New; 419c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setPrev(CurNode, New); 4207e70829632f82de15db187845666aaca6e04b792Chris Lattner 421c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->addNodeToList(New); // Notify traits that we added a node... 4227e70829632f82de15db187845666aaca6e04b792Chris Lattner return New; 4237e70829632f82de15db187845666aaca6e04b792Chris Lattner } 4247e70829632f82de15db187845666aaca6e04b792Chris Lattner 4253ff704fa2b67d6c857142218c5aca3058b6239fcChris Lattner iterator insertAfter(iterator where, NodeTy *New) { 426085a9ebbc705c6e7d3fd8c692ef1c46fdfb885ceMisha Brukman if (empty()) 4273ff704fa2b67d6c857142218c5aca3058b6239fcChris Lattner return insert(begin(), New); 4283ff704fa2b67d6c857142218c5aca3058b6239fcChris Lattner else 4293ff704fa2b67d6c857142218c5aca3058b6239fcChris Lattner return insert(++where, New); 4303ff704fa2b67d6c857142218c5aca3058b6239fcChris Lattner } 4313ff704fa2b67d6c857142218c5aca3058b6239fcChris Lattner 4327e70829632f82de15db187845666aaca6e04b792Chris Lattner NodeTy *remove(iterator &IT) { 4337e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(IT != end() && "Cannot remove end of list!"); 4347e70829632f82de15db187845666aaca6e04b792Chris Lattner NodeTy *Node = &*IT; 435c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet NodeTy *NextNode = this->getNext(Node); 436c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet NodeTy *PrevNode = this->getPrev(Node); 4377e70829632f82de15db187845666aaca6e04b792Chris Lattner 43847e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner if (Node != Head) // Is PrevNode off the beginning of the list? 439c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setNext(PrevNode, NextNode); 4407e70829632f82de15db187845666aaca6e04b792Chris Lattner else 4417e70829632f82de15db187845666aaca6e04b792Chris Lattner Head = NextNode; 442c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setPrev(NextNode, PrevNode); 4437e70829632f82de15db187845666aaca6e04b792Chris Lattner IT = NextNode; 4442b5326e7240ac524812016bc3700e12045bf0eb1Steve Naroff this->removeNodeFromList(Node); // Notify traits that we removed a node... 445e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman 4462896652be29de97a6e08b5cccc015096f4ed17b5Chris Lattner // Set the next/prev pointers of the current node to null. This isn't 4472896652be29de97a6e08b5cccc015096f4ed17b5Chris Lattner // strictly required, but this catches errors where a node is removed from 4482896652be29de97a6e08b5cccc015096f4ed17b5Chris Lattner // an ilist (and potentially deleted) with iterators still pointing at it. 4492896652be29de97a6e08b5cccc015096f4ed17b5Chris Lattner // When those iterators are incremented or decremented, they will assert on 4502896652be29de97a6e08b5cccc015096f4ed17b5Chris Lattner // the null next/prev pointer instead of "usually working". 451c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setNext(Node, 0); 452c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setPrev(Node, 0); 4537e70829632f82de15db187845666aaca6e04b792Chris Lattner return Node; 4547e70829632f82de15db187845666aaca6e04b792Chris Lattner } 4557e70829632f82de15db187845666aaca6e04b792Chris Lattner 4567e70829632f82de15db187845666aaca6e04b792Chris Lattner NodeTy *remove(const iterator &IT) { 4577e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator MutIt = IT; 4587e70829632f82de15db187845666aaca6e04b792Chris Lattner return remove(MutIt); 4597e70829632f82de15db187845666aaca6e04b792Chris Lattner } 4607e70829632f82de15db187845666aaca6e04b792Chris Lattner 4617e70829632f82de15db187845666aaca6e04b792Chris Lattner // erase - remove a node from the controlled sequence... and delete it. 4627e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator erase(iterator where) { 463c03c46a6af3d53172d48d9e4d36748a40c878cffDouglas Gregor this->deleteNode(remove(where)); 4647e70829632f82de15db187845666aaca6e04b792Chris Lattner return where; 4657e70829632f82de15db187845666aaca6e04b792Chris Lattner } 4667e70829632f82de15db187845666aaca6e04b792Chris Lattner 4677e70829632f82de15db187845666aaca6e04b792Chris Lattner 4687e70829632f82de15db187845666aaca6e04b792Chris Lattnerprivate: 4697e70829632f82de15db187845666aaca6e04b792Chris Lattner // transfer - The heart of the splice function. Move linked list nodes from 4707e70829632f82de15db187845666aaca6e04b792Chris Lattner // [first, last) into position. 4717e70829632f82de15db187845666aaca6e04b792Chris Lattner // 4727e70829632f82de15db187845666aaca6e04b792Chris Lattner void transfer(iterator position, iplist &L2, iterator first, iterator last) { 4737e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(first != last && "Should be checked by callers"); 47447e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner 4757e70829632f82de15db187845666aaca6e04b792Chris Lattner if (position != last) { 47647e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner // Note: we have to be careful about the case when we move the first node 47747e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner // in the list. This node is the list sentinel node and we can't move it. 47847e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner NodeTy *ThisSentinel = getTail(); 47947e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner setTail(0); 48047e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner NodeTy *L2Sentinel = L2.getTail(); 48147e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner L2.setTail(0); 48247e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner 4837e70829632f82de15db187845666aaca6e04b792Chris Lattner // Remove [first, last) from its old position. 4847e70829632f82de15db187845666aaca6e04b792Chris Lattner NodeTy *First = &*first, *Prev = getPrev(First); 4857e70829632f82de15db187845666aaca6e04b792Chris Lattner NodeTy *Next = last.getNodePtrUnchecked(), *Last = getPrev(Next); 4867e70829632f82de15db187845666aaca6e04b792Chris Lattner if (Prev) 487c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setNext(Prev, Next); 4887e70829632f82de15db187845666aaca6e04b792Chris Lattner else 4897e70829632f82de15db187845666aaca6e04b792Chris Lattner L2.Head = Next; 490c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setPrev(Next, Prev); 4917e70829632f82de15db187845666aaca6e04b792Chris Lattner 4927e70829632f82de15db187845666aaca6e04b792Chris Lattner // Splice [first, last) into its new position. 4937e70829632f82de15db187845666aaca6e04b792Chris Lattner NodeTy *PosNext = position.getNodePtrUnchecked(); 4947e70829632f82de15db187845666aaca6e04b792Chris Lattner NodeTy *PosPrev = getPrev(PosNext); 4957e70829632f82de15db187845666aaca6e04b792Chris Lattner 4967e70829632f82de15db187845666aaca6e04b792Chris Lattner // Fix head of list... 4977e70829632f82de15db187845666aaca6e04b792Chris Lattner if (PosPrev) 498c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setNext(PosPrev, First); 4997e70829632f82de15db187845666aaca6e04b792Chris Lattner else 5007e70829632f82de15db187845666aaca6e04b792Chris Lattner Head = First; 501c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setPrev(First, PosPrev); 5027e70829632f82de15db187845666aaca6e04b792Chris Lattner 5037e70829632f82de15db187845666aaca6e04b792Chris Lattner // Fix end of list... 504c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setNext(Last, PosNext); 505c1edbfc2bac278ef050615f403c1bc74ef44cf14Cedric Venet this->setPrev(PosNext, Last); 5067e70829632f82de15db187845666aaca6e04b792Chris Lattner 5077e70829632f82de15db187845666aaca6e04b792Chris Lattner transferNodesFromList(L2, First, PosNext); 50847e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner 509e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman // Now that everything is set, restore the pointers to the list sentinels. 51047e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner L2.setTail(L2Sentinel); 51147e756c11edbaa9a4916687eceaa4ec94c0aae3bChris Lattner setTail(ThisSentinel); 5127e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5137e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5147e70829632f82de15db187845666aaca6e04b792Chris Lattner 5157e70829632f82de15db187845666aaca6e04b792Chris Lattnerpublic: 5167e70829632f82de15db187845666aaca6e04b792Chris Lattner 5177e70829632f82de15db187845666aaca6e04b792Chris Lattner //===----------------------------------------------------------------------=== 5187e70829632f82de15db187845666aaca6e04b792Chris Lattner // Functionality derived from other functions defined above... 5197e70829632f82de15db187845666aaca6e04b792Chris Lattner // 5207e70829632f82de15db187845666aaca6e04b792Chris Lattner 5217e70829632f82de15db187845666aaca6e04b792Chris Lattner size_type size() const { 522e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman if (Head == 0) return 0; // Don't require construction of sentinel if empty. 5236bf7ca5f6f1c26bf8fb579ba456dae7c6e6f7e3aChris Lattner return std::distance(begin(), end()); 5247e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5257e70829632f82de15db187845666aaca6e04b792Chris Lattner 5267e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator erase(iterator first, iterator last) { 5277e70829632f82de15db187845666aaca6e04b792Chris Lattner while (first != last) 5287e70829632f82de15db187845666aaca6e04b792Chris Lattner first = erase(first); 5297e70829632f82de15db187845666aaca6e04b792Chris Lattner return last; 5307e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5317e70829632f82de15db187845666aaca6e04b792Chris Lattner 5326de84985a434bfd6e55323ad5cd9959d15aa554aChris Lattner void clear() { if (Head) erase(begin(), end()); } 5337e70829632f82de15db187845666aaca6e04b792Chris Lattner 5347e70829632f82de15db187845666aaca6e04b792Chris Lattner // Front and back inserters... 5357e70829632f82de15db187845666aaca6e04b792Chris Lattner void push_front(NodeTy *val) { insert(begin(), val); } 5367e70829632f82de15db187845666aaca6e04b792Chris Lattner void push_back(NodeTy *val) { insert(end(), val); } 5377e70829632f82de15db187845666aaca6e04b792Chris Lattner void pop_front() { 5387e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(!empty() && "pop_front() on empty list!"); 5397e70829632f82de15db187845666aaca6e04b792Chris Lattner erase(begin()); 5407e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5417e70829632f82de15db187845666aaca6e04b792Chris Lattner void pop_back() { 5427e70829632f82de15db187845666aaca6e04b792Chris Lattner assert(!empty() && "pop_back() on empty list!"); 5437e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator t = end(); erase(--t); 5447e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5457e70829632f82de15db187845666aaca6e04b792Chris Lattner 5467e70829632f82de15db187845666aaca6e04b792Chris Lattner // Special forms of insert... 5477e70829632f82de15db187845666aaca6e04b792Chris Lattner template<class InIt> void insert(iterator where, InIt first, InIt last) { 5487e70829632f82de15db187845666aaca6e04b792Chris Lattner for (; first != last; ++first) insert(where, *first); 5497e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5507e70829632f82de15db187845666aaca6e04b792Chris Lattner 5517e70829632f82de15db187845666aaca6e04b792Chris Lattner // Splice members - defined in terms of transfer... 5527e70829632f82de15db187845666aaca6e04b792Chris Lattner void splice(iterator where, iplist &L2) { 5537e70829632f82de15db187845666aaca6e04b792Chris Lattner if (!L2.empty()) 5547e70829632f82de15db187845666aaca6e04b792Chris Lattner transfer(where, L2, L2.begin(), L2.end()); 5557e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5567e70829632f82de15db187845666aaca6e04b792Chris Lattner void splice(iterator where, iplist &L2, iterator first) { 5577e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator last = first; ++last; 5587e70829632f82de15db187845666aaca6e04b792Chris Lattner if (where == first || where == last) return; // No change 5597e70829632f82de15db187845666aaca6e04b792Chris Lattner transfer(where, L2, first, last); 5607e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5617e70829632f82de15db187845666aaca6e04b792Chris Lattner void splice(iterator where, iplist &L2, iterator first, iterator last) { 5627e70829632f82de15db187845666aaca6e04b792Chris Lattner if (first != last) transfer(where, L2, first, last); 5637e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5647e70829632f82de15db187845666aaca6e04b792Chris Lattner 5657e70829632f82de15db187845666aaca6e04b792Chris Lattner 5667e70829632f82de15db187845666aaca6e04b792Chris Lattner 5677e70829632f82de15db187845666aaca6e04b792Chris Lattner //===----------------------------------------------------------------------=== 5687e70829632f82de15db187845666aaca6e04b792Chris Lattner // High-Level Functionality that shouldn't really be here, but is part of list 5697e70829632f82de15db187845666aaca6e04b792Chris Lattner // 5707e70829632f82de15db187845666aaca6e04b792Chris Lattner 5717e70829632f82de15db187845666aaca6e04b792Chris Lattner // These two functions are actually called remove/remove_if in list<>, but 5727e70829632f82de15db187845666aaca6e04b792Chris Lattner // they actually do the job of erase, rename them accordingly. 5737e70829632f82de15db187845666aaca6e04b792Chris Lattner // 5747e70829632f82de15db187845666aaca6e04b792Chris Lattner void erase(const NodeTy &val) { 5757e70829632f82de15db187845666aaca6e04b792Chris Lattner for (iterator I = begin(), E = end(); I != E; ) { 5767e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator next = I; ++next; 5777e70829632f82de15db187845666aaca6e04b792Chris Lattner if (*I == val) erase(I); 5787e70829632f82de15db187845666aaca6e04b792Chris Lattner I = next; 5797e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5807e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5817e70829632f82de15db187845666aaca6e04b792Chris Lattner template<class Pr1> void erase_if(Pr1 pred) { 5827e70829632f82de15db187845666aaca6e04b792Chris Lattner for (iterator I = begin(), E = end(); I != E; ) { 5837e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator next = I; ++next; 5847e70829632f82de15db187845666aaca6e04b792Chris Lattner if (pred(*I)) erase(I); 5857e70829632f82de15db187845666aaca6e04b792Chris Lattner I = next; 5867e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5877e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5887e70829632f82de15db187845666aaca6e04b792Chris Lattner 5897e70829632f82de15db187845666aaca6e04b792Chris Lattner template<class Pr2> void unique(Pr2 pred) { 5907e70829632f82de15db187845666aaca6e04b792Chris Lattner if (empty()) return; 5917e70829632f82de15db187845666aaca6e04b792Chris Lattner for (iterator I = begin(), E = end(), Next = begin(); ++Next != E;) { 5927e70829632f82de15db187845666aaca6e04b792Chris Lattner if (pred(*I)) 5937e70829632f82de15db187845666aaca6e04b792Chris Lattner erase(Next); 5947e70829632f82de15db187845666aaca6e04b792Chris Lattner else 5957e70829632f82de15db187845666aaca6e04b792Chris Lattner I = Next; 5967e70829632f82de15db187845666aaca6e04b792Chris Lattner Next = I; 5977e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5987e70829632f82de15db187845666aaca6e04b792Chris Lattner } 5997e70829632f82de15db187845666aaca6e04b792Chris Lattner void unique() { unique(op_equal); } 6007e70829632f82de15db187845666aaca6e04b792Chris Lattner 6017e70829632f82de15db187845666aaca6e04b792Chris Lattner template<class Pr3> void merge(iplist &right, Pr3 pred) { 6027e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator first1 = begin(), last1 = end(); 6037e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator first2 = right.begin(), last2 = right.end(); 6047e70829632f82de15db187845666aaca6e04b792Chris Lattner while (first1 != last1 && first2 != last2) 6057e70829632f82de15db187845666aaca6e04b792Chris Lattner if (pred(*first2, *first1)) { 6067e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator next = first2; 6077e70829632f82de15db187845666aaca6e04b792Chris Lattner transfer(first1, right, first2, ++next); 6087e70829632f82de15db187845666aaca6e04b792Chris Lattner first2 = next; 6097e70829632f82de15db187845666aaca6e04b792Chris Lattner } else { 6107e70829632f82de15db187845666aaca6e04b792Chris Lattner ++first1; 6117e70829632f82de15db187845666aaca6e04b792Chris Lattner } 6127e70829632f82de15db187845666aaca6e04b792Chris Lattner if (first2 != last2) transfer(last1, right, first2, last2); 6137e70829632f82de15db187845666aaca6e04b792Chris Lattner } 6147e70829632f82de15db187845666aaca6e04b792Chris Lattner void merge(iplist &right) { return merge(right, op_less); } 6157e70829632f82de15db187845666aaca6e04b792Chris Lattner 6167e70829632f82de15db187845666aaca6e04b792Chris Lattner template<class Pr3> void sort(Pr3 pred); 6177e70829632f82de15db187845666aaca6e04b792Chris Lattner void sort() { sort(op_less); } 6187e70829632f82de15db187845666aaca6e04b792Chris Lattner void reverse(); 6197e70829632f82de15db187845666aaca6e04b792Chris Lattner}; 6207e70829632f82de15db187845666aaca6e04b792Chris Lattner 6217e70829632f82de15db187845666aaca6e04b792Chris Lattner 6227e70829632f82de15db187845666aaca6e04b792Chris Lattnertemplate<typename NodeTy> 6237e70829632f82de15db187845666aaca6e04b792Chris Lattnerstruct ilist : public iplist<NodeTy> { 624a1cb4737b04a92f57b1b9dcd8a24c68db5035401Chris Lattner typedef typename iplist<NodeTy>::size_type size_type; 625a1cb4737b04a92f57b1b9dcd8a24c68db5035401Chris Lattner typedef typename iplist<NodeTy>::iterator iterator; 626a1cb4737b04a92f57b1b9dcd8a24c68db5035401Chris Lattner 6277e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist() {} 6287e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist(const ilist &right) { 62940c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner insert(this->begin(), right.begin(), right.end()); 6307e70829632f82de15db187845666aaca6e04b792Chris Lattner } 6317e70829632f82de15db187845666aaca6e04b792Chris Lattner explicit ilist(size_type count) { 63240c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner insert(this->begin(), count, NodeTy()); 633e21a6bae806d13e644a92b3df23e4d5b78bdb75cMisha Brukman } 6347e70829632f82de15db187845666aaca6e04b792Chris Lattner ilist(size_type count, const NodeTy &val) { 63540c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner insert(this->begin(), count, val); 6367e70829632f82de15db187845666aaca6e04b792Chris Lattner } 6377e70829632f82de15db187845666aaca6e04b792Chris Lattner template<class InIt> ilist(InIt first, InIt last) { 63840c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner insert(this->begin(), first, last); 6397e70829632f82de15db187845666aaca6e04b792Chris Lattner } 6407e70829632f82de15db187845666aaca6e04b792Chris Lattner 64183b5752747ea14696b0e51904722c38771f22eb7Gabor Greif // bring hidden functions into scope 64283b5752747ea14696b0e51904722c38771f22eb7Gabor Greif using iplist<NodeTy>::insert; 64383b5752747ea14696b0e51904722c38771f22eb7Gabor Greif using iplist<NodeTy>::push_front; 64483b5752747ea14696b0e51904722c38771f22eb7Gabor Greif using iplist<NodeTy>::push_back; 6457e70829632f82de15db187845666aaca6e04b792Chris Lattner 6467e70829632f82de15db187845666aaca6e04b792Chris Lattner // Main implementation here - Insert for a node passed by value... 6477e70829632f82de15db187845666aaca6e04b792Chris Lattner iterator insert(iterator where, const NodeTy &val) { 6487e70829632f82de15db187845666aaca6e04b792Chris Lattner return insert(where, createNode(val)); 6497e70829632f82de15db187845666aaca6e04b792Chris Lattner } 6507e70829632f82de15db187845666aaca6e04b792Chris Lattner 6517e70829632f82de15db187845666aaca6e04b792Chris Lattner 6527e70829632f82de15db187845666aaca6e04b792Chris Lattner // Front and back inserters... 65340c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner void push_front(const NodeTy &val) { insert(this->begin(), val); } 65440c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner void push_back(const NodeTy &val) { insert(this->end(), val); } 6557e70829632f82de15db187845666aaca6e04b792Chris Lattner 6567e70829632f82de15db187845666aaca6e04b792Chris Lattner // Special forms of insert... 6577e70829632f82de15db187845666aaca6e04b792Chris Lattner template<class InIt> void insert(iterator where, InIt first, InIt last) { 6587e70829632f82de15db187845666aaca6e04b792Chris Lattner for (; first != last; ++first) insert(where, *first); 6597e70829632f82de15db187845666aaca6e04b792Chris Lattner } 6607e70829632f82de15db187845666aaca6e04b792Chris Lattner void insert(iterator where, size_type count, const NodeTy &val) { 6617e70829632f82de15db187845666aaca6e04b792Chris Lattner for (; count != 0; --count) insert(where, val); 6627e70829632f82de15db187845666aaca6e04b792Chris Lattner } 6637e70829632f82de15db187845666aaca6e04b792Chris Lattner 6647e70829632f82de15db187845666aaca6e04b792Chris Lattner // Assign special forms... 6657e70829632f82de15db187845666aaca6e04b792Chris Lattner void assign(size_type count, const NodeTy &val) { 66640c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner iterator I = this->begin(); 66740c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner for (; I != this->end() && count != 0; ++I, --count) 6687e70829632f82de15db187845666aaca6e04b792Chris Lattner *I = val; 6697e70829632f82de15db187845666aaca6e04b792Chris Lattner if (count != 0) 67040c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner insert(this->end(), val, val); 6717e70829632f82de15db187845666aaca6e04b792Chris Lattner else 67240c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner erase(I, this->end()); 6737e70829632f82de15db187845666aaca6e04b792Chris Lattner } 67440c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner template<class InIt> void assign(InIt first1, InIt last1) { 67540c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner iterator first2 = this->begin(), last2 = this->end(); 6767e70829632f82de15db187845666aaca6e04b792Chris Lattner for ( ; first1 != last1 && first2 != last2; ++first1, ++first2) 6777e70829632f82de15db187845666aaca6e04b792Chris Lattner *first1 = *first2; 6787e70829632f82de15db187845666aaca6e04b792Chris Lattner if (first2 == last2) 6797e70829632f82de15db187845666aaca6e04b792Chris Lattner erase(first1, last1); 6807e70829632f82de15db187845666aaca6e04b792Chris Lattner else 6817e70829632f82de15db187845666aaca6e04b792Chris Lattner insert(last1, first2, last2); 6827e70829632f82de15db187845666aaca6e04b792Chris Lattner } 6837e70829632f82de15db187845666aaca6e04b792Chris Lattner 6847e70829632f82de15db187845666aaca6e04b792Chris Lattner 6857e70829632f82de15db187845666aaca6e04b792Chris Lattner // Resize members... 6867e70829632f82de15db187845666aaca6e04b792Chris Lattner void resize(size_type newsize, NodeTy val) { 68740c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner iterator i = this->begin(); 6887e70829632f82de15db187845666aaca6e04b792Chris Lattner size_type len = 0; 68940c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner for ( ; i != this->end() && len < newsize; ++i, ++len) /* empty*/ ; 6907e70829632f82de15db187845666aaca6e04b792Chris Lattner 6917e70829632f82de15db187845666aaca6e04b792Chris Lattner if (len == newsize) 69240c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner erase(i, this->end()); 6937e70829632f82de15db187845666aaca6e04b792Chris Lattner else // i == end() 69440c6fb6cac80367c2bec32295d4448e540f2d253Chris Lattner insert(this->end(), newsize - len, val); 6957e70829632f82de15db187845666aaca6e04b792Chris Lattner } 6967e70829632f82de15db187845666aaca6e04b792Chris Lattner void resize(size_type newsize) { resize(newsize, NodeTy()); } 6977e70829632f82de15db187845666aaca6e04b792Chris Lattner}; 6987e70829632f82de15db187845666aaca6e04b792Chris Lattner 699d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke} // End llvm namespace 700d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 7017e70829632f82de15db187845666aaca6e04b792Chris Lattnernamespace std { 7027e70829632f82de15db187845666aaca6e04b792Chris Lattner // Ensure that swap uses the fast list swap... 7037e70829632f82de15db187845666aaca6e04b792Chris Lattner template<class Ty> 704d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke void swap(llvm::iplist<Ty> &Left, llvm::iplist<Ty> &Right) { 7057e70829632f82de15db187845666aaca6e04b792Chris Lattner Left.swap(Right); 7067e70829632f82de15db187845666aaca6e04b792Chris Lattner } 7077e70829632f82de15db187845666aaca6e04b792Chris Lattner} // End 'std' extensions... 7087e70829632f82de15db187845666aaca6e04b792Chris Lattner 7091ff4ed726bb8526d1e49030245365f8c86a8bb49Anton Korobeynikov#endif // LLVM_ADT_ILIST_H 710