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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>Hyperlinked ECMA C# Language Specification</title><meta name="author" content="Jon Jagger" /><link rel="stylesheet" href="ecma334.css"></link></head><body><div align="right"><em><a href="http://www.jaggersoft.com">Jon Jagger</a></em></div><div align="right"><a href="mailto:jon@jaggersoft.com">jon@jaggersoft.com</a></div><form method="get" action="http://search.atomz.com/search/"><input size="30" name="sp-q"></input><input type="submit" value="Search C# Spec"></input><input type="hidden" name="sp-a" value="sp10024177"></input><input type="hidden" name="sp-f" value="ISO-8859-1"></input></form><a href="toc.htm">Table of Contents</a> <a href="1.htm">1</a> <a href="2.htm">2</a> <a href="3.htm">3</a> <a href="4.htm">4</a> <a href="5.htm">5</a> <a href="6.htm">6</a> <a href="7.htm">7</a> <a href="8.htm">8</a> <a href="9.htm">9</a> <a href="10.htm">10</a> <a href="11.htm">11</a> <a href="12.htm">12</a> <a href="13.htm">13</a> <a href="14.htm">14</a> <a href="15.htm">15</a> <a href="16.htm">16</a> <a href="17.htm">17</a> <a href="18.htm">18</a> <a href="19.htm">19</a> <a href="20.htm">20</a> <a href="21.htm">21</a> <a href="22.htm">22</a> <a href="23.htm">23</a> <a href="24.htm">24</a> <a href="25.htm">25</a> <a href="notes.htm">Notes</a> <a href="HyperlinkedCSharpECMA.zip">Download</a><span class="ruler"></span><span class="heading">ECMA-334 C# Language Specification</span><span class="navigate"><a href="1.htm"><img src="previous.gif" alt="previous" border="0" /></a><a href="3.htm"><img src="next.gif" alt="next" border="0" /></a></span><span class="clause-depth"><a href="1.htm"><img src="previous.gif" alt="previous at this level" border="0" /></a><a href="3.htm"><img src="next.gif" alt="next at this level" border="0" /></a> <span class="clause-number">2</span><span class="clause-title"> Conformance</span></span><span class="locator">
Paragraph 1</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P1S1"></a>Conformance is of interest to the following audiences: </span><ul><li><span class="sentence"><span class="sentence-number">2</span> <a name="P1S2"></a> Those designing, implementing, or maintaining C# implementations.</span> </li><li><span class="sentence"><span class="sentence-number">3</span> <a name="P1S3"></a> Governmental or commercial entities wishing to procure C# implementations.</span> </li><li><span class="sentence"><span class="sentence-number">4</span> <a name="P1S4"></a> Testing organizations wishing to provide a C# conformance test suite.</span> </li><li><span class="sentence"><span class="sentence-number">5</span> <a name="P1S5"></a> Programmers wishing to port code from one C# implementation to another.</span> </li><li><span class="sentence"><span class="sentence-number">6</span> <a name="P1S6"></a> Educators wishing to teach Standard C#.</span> </li><li><span class="sentence"><span class="sentence-number">7</span> <a name="P1S7"></a> Authors wanting to write about Standard C#.</span> </li></ul></span><span class="locator">
Paragraph 2</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P2S1"></a>As such, conformance is most important, and the bulk of this ECMA Standard is aimed at specifying the characteristics that make C# implementations and C# programs conforming ones.</span> </span><span class="locator">
Paragraph 3</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P3S1"></a>The text in this ECMA Standard that specifies requirements is considered normative.</span> <span class="sentence"><span class="sentence-number">2</span> <a name="P3S2"></a>All other text in this specification is informative; that is, for information purposes only.</span> <span class="sentence"><span class="sentence-number">3</span> <a name="P3S3"></a>Unless stated otherwise, all text is normative.</span> <span class="sentence"><span class="sentence-number">4</span> <a name="P3S4"></a>Normative text is further broken into required and conditional categories.</span> <span class="sentence"><span class="sentence-number">5</span> <a name="P3S5"></a>Conditionally normative text specifies requirements for a feature such that if that feature is provided, its syntax and semantics must be exactly as specified.</span> </span><span class="locator">
Paragraph 4</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P4S1"></a>If any requirement of this ECMA Standard is violated, the behavior is undefined.</span> <span class="sentence"><span class="sentence-number">2</span> <a name="P4S2"></a>Undefined behavior is otherwise indicated in this ECMA Standard by the words ''undefined behavior'' or by the omission of any explicit definition of behavior.</span> <span class="sentence"><span class="sentence-number">3</span> <a name="P4S3"></a>There is no difference in emphasis among these three; they all describe ''behavior that is undefined.'' </span></span><span class="paragraph"><span class="sentence"><span class="sentence-number">4</span> <a name="P4S4"></a>A strictly conforming program shall use only those features of the language specified in this ECMA Standard as being required.</span> <span class="sentence"><span class="sentence-number">5</span> <a name="P4S5"></a>(This means that a strictly conforming program cannot use any conditionally normative feature.)</span> <span class="sentence"><span class="sentence-number">6</span> <a name="P4S6"></a>It shall not produce output dependent on any unspecified, undefined, or implementation-defined behavior.</span> </span><span class="locator">
Paragraph 5</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P5S1"></a>A conforming implementation of C# must accept any strictly conforming program.</span> </span><span class="locator">
Paragraph 6</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P6S1"></a>A conforming implementation of C# must provide and support all the types, values, objects, properties, methods, and program syntax and semantics described in this ECMA Standard.</span> </span><span class="locator">
Paragraph 7</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P7S1"></a>A conforming implementation of C# shall interpret characters in conformance with the Unicode Standard, Version 3.0 or later, and ISO/IEC 10646-1.</span> <span class="sentence"><span class="sentence-number">2</span> <a name="P7S2"></a>Conforming implementations must accept Unicode source files encoded with the UTF-8 encoding form.</span> </span><span class="locator">
Paragraph 8</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P8S1"></a>A conforming implementation of C# shall not successfully translate source containing a <span class="symbol">#error</span> preprocessing directive unless it is part of a group skipped by conditional compilation.</span> </span><span class="locator">
Paragraph 9</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P9S1"></a>A conforming implementation of C# shall produce at least one diagnostic message if the source program violates any rule of syntax, or any negative requirement (defined as a "shall" or "shall not" or "error" or "warning" requirement), unless that requirement is marked with the words "no diagnostic is required".</span> </span><span class="locator">
Paragraph 10</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P10S1"></a>A conforming implementation of C# is permitted to provide additional types, values, objects, properties, and methods beyond those described in this ECMA Standard, provided they do not alter the behavior of any strictly conforming program.</span> <span class="sentence"><span class="sentence-number">2</span> <a name="P10S2"></a>Conforming implementations are required to diagnose programs that use extensions that are ill formed according to this ECMA Standard.</span> <span class="sentence"><span class="sentence-number">3</span> <a name="P10S3"></a>Having done so, however; they can compile and execute such programs.</span> <span class="sentence"><span class="sentence-number">4</span> <a name="P10S4"></a>(The ability to have extensions implies that a conforming implementation reserves no identifiers other than those explicitly reserved in this ECMA Standard.)</span> </span><span class="locator">
Paragraph 11</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P11S1"></a>A conforming implementation of C# shall be accompanied by a document that defines all implementation-defined characteristics, and all extensions.</span> </span><span class="locator">
Paragraph 12</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P12S1"></a>A conforming implementation of C# shall support the class library documented in §D.</span> <span class="sentence"><span class="sentence-number">2</span> <a name="P12S2"></a>This library is included by reference in this ECMA Standard.</span> </span><span class="locator">
Paragraph 13</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P13S1"></a>A conforming program is one that is acceptable to a conforming implementation.</span> <span class="sentence"><span class="sentence-number">2</span> <a name="P13S2"></a>(Such a program may contain extensions or conditionally normative features.)</span> </span><span class="ruler"></span><table><tr><td><table align="left" bgcolor="navy"><tr bgcolor="navy"><td><font face="Arial,sans-serif" size="6" color="yellow"><strong>{ JSL }</strong></font></td></tr></table></td></tr><tr><td><font face="Arial,sans-serif" size="2" color="navy"><strong>Jagger Software Ltd</strong></font></td></tr><tr><td><font face="Arial,sans-serif" size="2" color="navy"><strong>Company # 4070126</strong></font></td></tr><tr><td><font face="Arial,sans-serif" size="2" color="navy"><strong>VAT # 762 5213 42</strong></font></td></tr></table><img src="valid-html401.png" align="left" height="31" width="88" alt="Valid HTML 4.01" /><img src="vcss.gif" align="left" height="31" width="88" alt="Valid CSS" /></body></html>⌨️ 快捷键说明
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