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105 lines
2.2 KiB
C++
105 lines
2.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// Not a portable test
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// Precondition: __x->__left_ != nullptr
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// template <class _NodePtr>
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// void
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// __tree_right_rotate(_NodePtr __x);
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#include <__tree>
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#include <cassert>
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#include "test_macros.h"
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struct Node
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{
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Node* __left_;
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Node* __right_;
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Node* __parent_;
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Node* __parent_unsafe() const { return __parent_; }
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void __set_parent(Node* x) { __parent_ = x;}
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Node() : __left_(), __right_(), __parent_() {}
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};
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void
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test1()
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{
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Node root;
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Node x;
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Node y;
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root.__left_ = &x;
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x.__left_ = &y;
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x.__right_ = 0;
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x.__parent_ = &root;
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y.__left_ = 0;
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y.__right_ = 0;
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y.__parent_ = &x;
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std::__tree_right_rotate(&x);
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assert(root.__parent_ == 0);
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assert(root.__left_ == &y);
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assert(root.__right_ == 0);
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assert(y.__parent_ == &root);
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assert(y.__left_ == 0);
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assert(y.__right_ == &x);
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assert(x.__parent_ == &y);
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assert(x.__left_ == 0);
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assert(x.__right_ == 0);
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}
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void
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test2()
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{
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Node root;
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Node x;
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Node y;
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Node a;
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Node b;
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Node c;
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root.__left_ = &x;
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x.__left_ = &y;
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x.__right_ = &c;
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x.__parent_ = &root;
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y.__left_ = &a;
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y.__right_ = &b;
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y.__parent_ = &x;
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a.__parent_ = &y;
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b.__parent_ = &y;
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c.__parent_ = &x;
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std::__tree_right_rotate(&x);
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assert(root.__parent_ == 0);
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assert(root.__left_ == &y);
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assert(root.__right_ == 0);
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assert(y.__parent_ == &root);
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assert(y.__left_ == &a);
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assert(y.__right_ == &x);
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assert(x.__parent_ == &y);
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assert(x.__left_ == &b);
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assert(x.__right_ == &c);
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assert(a.__parent_ == &y);
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assert(a.__left_ == 0);
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assert(a.__right_ == 0);
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assert(b.__parent_ == &x);
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assert(b.__left_ == 0);
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assert(b.__right_ == 0);
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assert(c.__parent_ == &x);
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assert(c.__left_ == 0);
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assert(c.__right_ == 0);
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}
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int main(int, char**)
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{
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test1();
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test2();
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return 0;
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}
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