QStack Class

The QStack class is a template class that provides a stack. 更多...

头文件:	#include <QStack>
qmake:	QT += core
基类:	QVector

所有的成员列表, 包括继承的成员

Note: All functions in this class are reentrant.

公有函数

T	pop()
void	push(const T &t)
void	swap(QStack<T> &other)
T &	top()
const T &	top() const

89 个公有函数继承自 QVector

其他继承的成员

2 个静态公有成员继承自 QVector

详细描述

The QStack class is a template class that provides a stack.

QStack<T> is one of Qt's generic container classes. It implements a stack data structure for items of a same type.

A stack is a last in, first out (LIFO) structure. Items are added to the top of the stack using push() and retrieved from the top using pop(). The top() function provides access to the topmost item without removing it.

Example:


      QStack<int> stack;
      stack.push(1);
      stack.push(2);
      stack.push(3);
      while (!stack.isEmpty())
          cout << stack.pop() << endl;

The example will output 3, 2, 1 in that order.

QStack inherits from QVector. All of QVector's functionality also applies to QStack. For example, you can use isEmpty() to test whether the stack is empty, and you can traverse a QStack using QVector's iterator classes (for example, QVectorIterator). But in addition, QStack provides three convenience functions that make it easy to implement LIFO semantics: push(), pop(), and top().

QStack's value type must be an assignable data type. This covers most data types that are commonly used, but the compiler won't let you, for example, store a QWidget as a value; instead, store a QWidget *.

参见 QVector and QQueue.

成员函数

T QStack::pop()

Removes the top item from the stack and returns it. This function assumes that the stack isn't empty.

参见 top(), push(), and isEmpty().

void QStack::push(const T &t)

Adds element t to the top of the stack.

This is the same as QVector::append().

参见 pop() and top().

void QStack::swap(QStack<T> &other)

Swaps stack other with this stack. This operation is very fast and never fails.

This function was introduced in Qt 4.8.

T &QStack::top()

Returns a reference to the stack's top item. This function assumes that the stack isn't empty.

This is the same as QVector::last().

参见 pop(), push(), and isEmpty().

const T &QStack::top() const

This is an overloaded function.

参见 pop() and push().

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