104 lines
2.0 KiB
HTML
104 lines
2.0 KiB
HTML
<HTML>
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<!--
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Copyright (c) Jeremy Siek, Lie-Quan Lee, and Andrew Lumsdaine 2000
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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-->
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<Head>
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<Title>BasicMatrix</Title>
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<BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b"
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ALINK="#ff0000">
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<IMG SRC="../../../boost.png"
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ALT="C++ Boost" width="277" height="86">
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<BR Clear>
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<H1><A NAME="concept:BasicMatrix"></A>
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BasicMatrix
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</H1>
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The BasicMatrix concept provides a minimalist interface for
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accessing elements from a 2 dimensional table of values.
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<H3>Refinement of</H3>
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none
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<h3>Notation</h3>
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<Table>
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<TR>
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<TD>{<tt>M,I,V</tt>}</TD>
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<TD>The matrix, index, and values types that together model the BasicMatrix concept.</TD>
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</TR>
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<TR>
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<TD><tt>A</tt></TD>
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<TD>An object of type <tt>M</tt>.</TD>
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</TR>
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<TR>
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<TD><tt>i, j</tt></TD>
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<TD>Objects of type <tt>I</tt>.</TD>
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</TR>
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</table>
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<H3>Associated Types</H3>
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none
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<h3>Valid Expressions</h3>
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<Table border>
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<tr>
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<td><a name="sec:elt-access"><TT>A[i][j]</TT></a></TD>
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<TD>Returns a reference to the element object stored at index <tt>(i,j)</tt><br>
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Return type: <TT>V&</TT> for mutable <tt>A</tt> or <TT>const V&</TT>
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for constant <tt>A</tt>.
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</TD>
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</TR>
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</table>
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<H3>Complexity guarantees</H3>
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Element access is constant time.
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<H3>Concept Checking Class</H3>
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<pre>
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template <class M, class I, class V>
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struct BasicMatrixConcept
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{
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void constraints() {
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V& elt = A[i][j];
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const_constraints(A);
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ignore_unused_variable_warning(elt);
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}
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void const_constraints(const M& A) {
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const V& elt = A[i][j];
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ignore_unused_variable_warning(elt);
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}
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M A;
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I i, j;
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};
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</pre>
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<br>
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<HR>
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<TABLE>
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<TR valign=top>
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<TD nowrap>Copyright © 2000-2001</TD><TD>
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<A HREF="http://www.boost.org/people/jeremy_siek.htm">Jeremy Siek</A>,
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Indiana University (<A
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HREF="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</A>)
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</TD></TR></TABLE>
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</BODY>
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</HTML>
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