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<HTML><!-- -- Copyright (c) 1996-1999 -- Silicon Graphics Computer Systems, Inc. -- -- Permission to use, copy, modify, distribute and sell this software -- and its documentation for any purpose is hereby granted without fee, -- provided that the above copyright notice appears in all copies and -- that both that copyright notice and this permission notice appear -- in supporting documentation. Silicon Graphics makes no -- representations about the suitability of this software for any -- purpose. It is provided "as is" without express or implied warranty. -- -- Copyright (c) 1994 -- Hewlett-Packard Company -- -- Permission to use, copy, modify, distribute and sell this software -- and its documentation for any purpose is hereby granted without fee, -- provided that the above copyright notice appears in all copies and -- that both that copyright notice and this permission notice appear -- in supporting documentation. Hewlett-Packard Company makes no -- representations about the suitability of this software for any -- purpose. It is provided "as is" without express or implied warranty. -- --><Head><Title>Sequence</Title><!-- Generated by htmldoc --></HEAD><BODY TEXT="#000000" LINK="#006600" ALINK="#003300" VLINK="#7C7F87" BGCOLOR="#FFFFFF"><A HREF="/"><IMG SRC="/images/common/sgilogo_small.gif" ALT="SGI Logo" WIDTH="80" HEIGHT="72" BORDER="0"></A><P><!--end header--><BR Clear><H1>Sequence</H1><Table CellPadding=0 CellSpacing=0 width=100%><TR><TD Align=left><Img src = "containers.gif" Alt="" WIDTH = "194" HEIGHT = "38" ></TD><TD Align=right><Img src = "concept.gif" Alt="" WIDTH = "194" HEIGHT = "38" ></TD></TR><TR><TD Align=left VAlign=top><b>Category</b>: containers</TD><TD Align=right VAlign=top><b>Component type</b>: concept</TD></TR></Table><h3>Description</h3>A Sequence is a variable-sized <A href="Container.html">Container</A> whoseelements are arranged in a strict linear order. It supports insertionand removal of elements.<h3>Refinement of</h3><A href="ForwardContainer.html">Forward Container</A>, <A href="DefaultConstructible.html">Default Constructible</A><h3>Associated types</h3>None, except for those of <A href="ForwardContainer.html">Forward Container</A>.<h3>Notation</h3><Table><TR><TD VAlign=top><tt>X</tt></TD><TD VAlign=top>A type that is a model of Sequence</TD></TR><TR><TD VAlign=top><tt>a</tt>, <tt>b</tt></TD><TD VAlign=top>Object of type <tt>X</tt></TD></TR><TR><TD VAlign=top><tt>T</tt></TD><TD VAlign=top>The value type of <tt>X</tt></TD></TR><TR><TD VAlign=top><tt>t</tt></TD><TD VAlign=top>Object of type <tt>T</tt></TD></TR><TR><TD VAlign=top><tt>p</tt>, <tt>q</tt></TD><TD VAlign=top>Object of type <tt>X::iterator</tt></TD></TR><TR><TD VAlign=top><tt>n</tt></TD><TD VAlign=top>Object of a type convertible to <tt>X::size_type</tt></TD></tr></table><h3>Definitions</h3>If <tt>a</tt> is a Sequence, then <tt>p</tt> is a<i>valid iterator in a</i> if it is a valid (nonsingular) iterator that is reachable from <tt>a.begin()</tt>.<P>If <tt>a</tt> is a Sequence, then <tt>[p, q)</tt> is a <i>valid range in a</i>if <tt>p</tt> and <tt>q</tt> are valid iterators in <tt>a</tt> and if <tt>q</tt> is reachablefrom <tt>p</tt>.<h3>Valid expressions</h3>In addition to the expressions defined in <A href="ForwardContainer.html">Forward Container</A>, thefollowing expressions must be valid.<Table border><TR><TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH><TH>Return type</TH></TR><TR><TD VAlign=top>Fill constructor</TD><TD VAlign=top><tt>X(n, t)</tt></TD><TD VAlign=top> </TD><TD VAlign=top><tt>X</tt></TD></TR><TR><TD VAlign=top>Fill constructor</TD><TD VAlign=top><tt>X a(n, t);</tt></TD><TD VAlign=top> </TD><TD VAlign=top> </TD></TR><TR><TD VAlign=top>Default fill constructor</TD><TD VAlign=top><tt>X(n)</tt></TD><TD VAlign=top><tt>T</tt> is <A href="DefaultConstructible.html">DefaultConstructible</A>.</TD><TD VAlign=top><tt>X</tt></TD></TR><TR><TD VAlign=top>Default fill constructor</TD><TD VAlign=top><tt>X a(n);</tt></TD><TD VAlign=top><tt>T</tt> is <A href="DefaultConstructible.html">DefaultConstructible</A>.</TD><TD VAlign=top> </TD></TR><TR><TD VAlign=top>Range constructor</TD><TD VAlign=top><tt>X(i, j)</tt></TD><TD VAlign=top><tt>i</tt> and <tt>j</tt> are <A href="InputIterator.html">Input Iterators</A> whose value type is convertible to <tt>T</tt> <A href="#1">[1]</A></TD><TD VAlign=top><tt>X</tt></TD></TR><TR><TD VAlign=top>Range constructor</TD><TD VAlign=top><tt>X a(i, j);</tt></TD><TD VAlign=top><tt>i</tt> and <tt>j</tt> are <A href="InputIterator.html">Input Iterators</A> whose value type is convertible to <tt>T</tt> <A href="#1">[1]</A></TD><TD VAlign=top> </TD></TR><TR><TD VAlign=top>Front</TD><TD VAlign=top><tt>a.front()</tt></TD><TD VAlign=top> </TD><TD VAlign=top><tt>reference</tt> if <tt>a</tt> is mutable, <tt>const_reference</tt> otherwise.</TD></TR><TR><TD VAlign=top>Insert</TD><TD VAlign=top><tt>a.insert(p, t)</tt></TD><TD VAlign=top> </TD><TD VAlign=top><tt>X::iterator</tt></TD></TR><TR><TD VAlign=top>Fill insert</TD><TD VAlign=top><tt>a.insert(p, n, t)</tt></TD><TD VAlign=top><tt>a</tt> is mutable</TD><TD VAlign=top><tt>void</tt></TD></TR><TR><TD VAlign=top>Range insert</TD><TD VAlign=top><tt>a.insert(p, i, j)</tt></TD><TD VAlign=top><tt>i</tt> and <tt>j</tt> are <A href="InputIterator.html">Input Iterators</A> whose value type is convertible to <tt>T</tt> <A href="#1">[1]</A>. <tt>a</tt> is mutable</TD><TD VAlign=top><tt>void</tt></TD></TR><TR><TD VAlign=top>Erase</TD><TD VAlign=top><tt>a.erase(p)</tt></TD><TD VAlign=top><tt>a</tt> is mutable</TD><TD VAlign=top><tt>iterator</tt></TD></TR><TR><TD VAlign=top>Range erase</TD><TD VAlign=top><tt>a.erase(p,q)</tt></TD><TD VAlign=top><tt>a</tt> is mutable</TD><TD VAlign=top><tt>iterator</tt></TD></TR><TR><TD VAlign=top>Clear</TD><TD VAlign=top><tt>a.clear()</tt></TD><TD VAlign=top><tt>a</tt> is mutable</TD><TD VAlign=top><tt>void</tt></TD></TR><TR><TD VAlign=top>Resize</TD><TD VAlign=top><tt>a.resize(n, t)</tt></TD><TD VAlign=top><tt>a</tt> is mutable</TD><TD VAlign=top><tt>void</tt></TD></TR><TR><TD VAlign=top>Resize</TD><TD VAlign=top><tt>a.resize(n)</tt></TD><TD VAlign=top><tt>a</tt> is mutable</TD><TD VAlign=top><tt>void</tt></TD></tr></table><h3>Expression semantics</h3>Semantics of an expression is defined only where it is not defined in<A href="ForwardContainer.html">Forward Container</A>, or where it differs.<Table border><TR><TH>Name</TH><TH>Expression</TH><TH>Precondition</TH><TH>Semantics</TH><TH>Postcondition</TH></TR><TR><TD VAlign=top>Fill constructor</TD><TD VAlign=top><tt>X(n, t)</tt></TD><TD VAlign=top><tt>n >= 0</tt></TD><TD VAlign=top>Creates a sequence with <tt>n</tt> copies of <tt>t</tt></TD>⌨️ 快捷键说明
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