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<!-- Crown Copyright (c) 1998 -->
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<HTML>
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<HEAD>
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<TITLE>
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C++ Producer Guide: #pragma directive syntax
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</TITLE>
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</HEAD>
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<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#0000FF" VLINK="#400080" ALINK="#FF0000">
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<H1>C++ Producer Guide</H1>
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<H3>March 1998</H3>
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</A>
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<IMG SRC="../images/no_index.gif" ALT="document index"><P>
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<HR>
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<H1>Annex A. <CODE>#pragma</CODE> directive syntax</H1>
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<P>
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The following gives a summary of the syntax for the <CODE>#pragma</CODE>
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directives used for <A HREF="pragma.html">compiler configuration</A>
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and <A HREF="token.html">token specification</A>:
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<PRE>
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<HR>
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<I>pragma-directive</I> :
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<A HREF="#tendra"># pragma TenDRA ++<I><SUB>opt</SUB> tendra-directive</I></A>
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<A HREF="#token"># pragma <I>token-directive</I></A>
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<A NAME="tendra"><I>tendra-directive</I></A> :
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<A HREF="#scope"><I>scope-directive</I></A>
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<A HREF="#low"><I>low-level-directive</I></A>
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<A HREF="#analysis"><I>analysis-directive on</I></A>
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<A HREF="#check"><I>check-directive allow</I></A>
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<A HREF="#keyword"><I>keyword-directive</I></A>
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<A HREF="#type"><I>type-directive</I></A>
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<A HREF="#linkage"><I>linkage-directive</I></A>
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<A HREF="#misc"><I>misc-directive</I></A>
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<A HREF="#token1"><I>tendra-token-directive</I></A>
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<I>on</I> :
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on
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warning
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off
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<I>allow</I> :
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allow
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warning
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disallow
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<HR>
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<A NAME="scope"><I>scope-directive</I></A> :
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<A HREF="pragma.html#scope">begin</A>
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<A HREF="pragma.html#scope">begin name environment <I>identifier</I></A>
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<A HREF="pragma.html#scope">end</A>
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<A HREF="pragma.html#scope">directory <I>identifier</I> use environment <I>identifier</I></A>
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<A HREF="pragma.html#scope">use environment <I>identifier</I></A>
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<A HREF="pragma.html#scope">use environment <I>identifier</I> reset <I>allow</I></A>
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<HR>
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<A NAME="low"><I>low-level-directive</I></A> :
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<A HREF="pragma.html#low">error <I>string-literal allow</I></A>
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<A HREF="pragma.html#low">error <I>string-literal on</I></A>
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<A HREF="pragma.html#low">error <I>string-literal</I> as option <I>string-literal</I></A>
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<A HREF="pragma.html#low">option <I>string-literal allow</I></A>
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<A HREF="pragma.html#low">option <I>string-literal on</I></A>
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<A HREF="pragma.html#limits">option value <I>string-literal integer-literal</I></A>
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<A HREF="pragma.html#low">use error <I>string-literal</I></A>
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<HR>
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<A NAME="analysis"><I>analysis-directive</I></A> :
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<A HREF="pragma.html#init">complete initialization analysis</A>
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<A HREF="pragma.html#elab">complete struct / union analysis</A>
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<A HREF="pragma.html#conv">conversion analysis <I>conversion-spec<SUB>opt</SUB></I></A>
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<A HREF="pragma.html#discard">discard analysis <I>discard-spec<SUB>opt</SUB></I></A>
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<A HREF="pragma.html#switch">enum switch analysis</A>
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<A HREF="pragma.html#linkage">external function linkage</A>
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<A HREF="pragma.html#for">for initialization block</A>
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<A HREF="pragma.html#elab">ignore struct / union / enum tag</A>
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<A HREF="pragma.html#template">implicit export template</A>
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<A HREF="pragma.html#impl_func">implicit function declaration</A>
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<A HREF="pragma.html#exp">integer operator analysis</A>
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<A HREF="pragma.html#exp">integer overflow analysis</A>
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<A HREF="pragma.html#comment">nested comment analysis</A>
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<A HREF="pragma.html#exp">operator precedence analysis</A>
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<A HREF="pragma.html#exp">pointer operator analysis</A>
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<A HREF="pragma.html#throw">throw analysis</A>
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<A HREF="pragma.html#linkage">unify external linkage</A>
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<A HREF="pragma.html#variable">variable analysis</A>
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<A HREF="pragma.html#hide">variable hiding analysis</A>
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<A HREF="pragma.html#weak">weak prototype analysis</A>
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<I>conversion-spec</I> :
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( int - int <I>implicit-spec<SUB>opt</SUB></I> )
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( int - pointer <I>implicit-spec<SUB>opt</SUB></I> )
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( pointer - int <I>implicit-spec<SUB>opt</SUB></I> )
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( pointer - pointer <I>implicit-spec<SUB>opt</SUB></I> )
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( int - enum implicit )
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( pointer - void * implicit )
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( void * - pointer implicit )
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<I>implicit-spec</I> :
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implicit
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explicit
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<I>discard-spec</I> :
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( function return )
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( static )
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( value )
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<HR>
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<A NAME="check"><I>check-directive</I></A> :
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<A HREF="pragma.html#overload">ambiguous overload resolution</A>
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<A HREF="pragma.html#if">assignment as bool</A>
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<A HREF="pragma.html#bitfield">bitfield overflow</A>
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<A HREF="pragma.html#linkage">block function static</A>
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<A HREF="pragma.html#catch_all">catch all</A>
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<A HREF="pragma.html#escape">character escape overflow</A>
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<A HREF="token.html#tokdef">compatible token</A>
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<A HREF="pragma.html#include">complete file includes</A>
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<A HREF="pragma.html#target-if">conditional declaration</A>
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<A HREF="pragma.html#lvalue">conditional lvalue</A>
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<A HREF="pragma.html#overload">conditional overload resolution <I>overload-spec<SUB>opt</SUB></I></A>
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<A HREF="pragma.html#if">const conditional</A>
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<A HREF="pragma.html#macro">directive as macro argument</A>
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<A HREF="pragma.html#identifier">dollar as ident</A>
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<A HREF="pragma.html#elab">extra ,</A>
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<A HREF="pragma.html#decl_none">extra ;</A>
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<A HREF="pragma.html#if">extra ; after conditional</A>
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<A HREF="pragma.html#weak">extra ...</A>
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<A HREF="pragma.html#bitfield">extra bitfield int type</A>
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<A HREF="pragma.html#macro">extra macro definition</A>
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<A HREF="pragma.html#typedef">extra type definition</A>
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<A HREF="pragma.html#switch">fall into case</A>
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<A HREF="pragma.html#elab">forward enum declaration</A>
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<A HREF="pragma.html#conv">function pointer as pointer</A>
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<A HREF="pragma.html#ellipsis">ident ...</A>
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<A HREF="pragma.html#implicit">implicit int type <I>inttype-spec<SUB>opt</SUB></I></A>
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<A HREF="token.html#tokdef">implicit token definition</A>
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<A HREF="token.html#spec">incompatible interface declaration</A>
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<A HREF="token.html#member">incompatible member declaration</A>
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<A HREF="pragma.html#linkage">incompatible linkage</A>
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<A HREF="pragma.html#weak">incompatible promoted function argument</A>
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<A HREF="pragma.html#compatible">incompatible type qualifier</A>
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<A HREF="pragma.html#return">incompatible void return</A>
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<A HREF="pragma.html#complete">incomplete type as object type</A>
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<A HREF="pragma.html#ppdir">indented # directive</A>
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<A HREF="pragma.html#ppdir">indented directive after #</A>
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<A HREF="pragma.html#init">initialization of struct / union ( auto )</A>
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<A HREF="pragma.html#longlong">longlong type</A>
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<A HREF="pragma.html#ppdir">no directive / nline after ident</A>
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<A HREF="pragma.html#empty">no external declaration</A>
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<A HREF="pragma.html#macro">no ident after #</A>
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<A HREF="pragma.html#lex">no nline after file end</A>
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<A HREF="token.html#tokdef">no token definition</A>
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<A HREF="pragma.html#overload">overload resolution</A>
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<A HREF="pragma.html#weak">prototype</A>
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<A HREF="pragma.html#weak">prototype ( weak )</A>
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<A HREF="token.html#exp">rvalue token as const</A>
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<A HREF="pragma.html#ppdir">text after directive</A>
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<A HREF="pragma.html#lvalue">this lvalue</A>
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<A HREF="pragma.html#string">unify incompatible string literal</A>
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<A HREF="pragma.html#ppdir">unknown directive</A>
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<A HREF="pragma.html#escape">unknown escape</A>
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<A HREF="pragma.html#ppdir">unknown pragma</A>
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<A HREF="pragma.html#decl_none">unknown struct / union</A>
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<A HREF="pragma.html#string">unmatched quote</A>
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<A HREF="pragma.html#reach">unreachable code</A>
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<A HREF="pragma.html#init">variable initialization</A>
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<A HREF="pragma.html#macro">weak macro equality</A>
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<A HREF="pragma.html#string">writeable string literal</A>
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<I>inttype-spec</I> :
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for const / volatile
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for external declaration
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for function return
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<I>overload-spec</I> :
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( complete )
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( incomplete )
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<HR>
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<A NAME="keyword"><I>keyword-directive</I></A> :
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<A HREF="#keyword">keyword <I>identifier</I> for <I>keyword-spec</I></A>
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<A HREF="pragma.html#keyword-spec">undef keyword <I>identifier</I></A>
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<A NAME="keyword-spec"><I>keyword-spec</I></A> :
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<A HREF="pragma.html#discard">discard value</A>
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<A HREF="pragma.html#variable">discard variable</A>
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<A HREF="pragma.html#switch">exhaustive</A>
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<A HREF="pragma.html#switch">fall into case</A>
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<A HREF="pragma.html#keyword">keyword <I>identifier</I></A>
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<A HREF="pragma.html#keyword">operator <I>operator</I></A>
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<A HREF="pragma.html#variable">set</A>
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<A HREF="pragma.html#reach">set reachable</A>
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<A HREF="pragma.html#reach">set unreachable</A>
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<A HREF="pragma.html#conv">type representation</A>
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<A HREF="pragma.html#weak">weak</A>
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<HR>
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<A NAME="type"><I>type-directive</I></A> :
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<A HREF="pragma.html#reach">bottom <I>identifier</I></A>
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<A HREF="pragma.html#char">character <I>character-sign</I></A>
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<A HREF="pragma.html#identifier">character <I>character-literal character-mapping</I></A>
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<A HREF="pragma.html#identifier">character <I>string-literal character-mapping</I></A>
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<A HREF="lib.html#arith">compute promote <I>identifier</I></A>
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<A HREF="pragma.html#escape">escape <I>character-literal character-mapping</I></A>
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<A HREF="pragma.html#int">integer literal <I>literal-spec</I></A>
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<A HREF="lib.html#arith">promoted <I>type-id</I> : <I>type-id</I></A>
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<A HREF="pragma.html#char">set character literal : <I>type-id</I></A>
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<A HREF="pragma.html#longlong">set longlong type : <I>longlong-spec</I></A>
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<A HREF="pragma.html#char">set ptrdiff_t : <I>type-id</I></A>
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<A HREF="pragma.html#char">set size_t : <I>type-id</I></A>
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<A HREF="pragma.html#char">set wchar_t : <I>type-id</I></A>
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<A HREF="pragma.html#string">set string literal : <I>string-const</I></A>
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<A HREF="pragma.html#std">set std namespace : <I>scope-name</I></A>
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<A HREF="#type-spec">type <I>identifier</I> for <I>type-spec</I></A>
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<I>character-sign</I> :
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signed
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unsigned
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either
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<I>character-mapping</I> :
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as <I>character-literal</I> allow
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disallow
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<I>literal-spec</I> :
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<I>literal-base literal-suffix<SUB>opt</SUB> literal-type-list</I>
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<I>literal-base</I> :
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decimal
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octal
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hexadecimal
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<I>literal-suffix</I> :
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unsigned
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long
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unsigned long
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long long
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unsigned long long
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<I>literal-type-list</I> :
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* <I>literal-type-spec</I>
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<I>integer-literal literal-type-spec</I> | <I>literal-type-list</I>
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? <I>literal-type-spec</I> | <I>literal-type-list</I>
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<I>literal-type-spec</I> :
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: <I>type-id</I>
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* <I>allow<SUB>opt</SUB></I> : <I>identifier</I>
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* * <I>allow<SUB>opt</SUB></I> :
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<I>longlong-spec</I> :
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long
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long long
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<I>string-const</I> :
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const
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no const
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<I>scope-name</I> :
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<I>identifier</I>
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::
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<A NAME="type-spec"><I>type-spec</I></A> :
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<A HREF="pragma.html#reach">bottom</A>
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<A HREF="pragma.html#char">ptrdiff_t</A>
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<A HREF="pragma.html#char">size_t</A>
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<A HREF="pragma.html#char">wchar_t</A>
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<A HREF="pragma.html#printf">... printf</A>
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<A HREF="pragma.html#printf">... scanf</A>
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<HR>
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<A NAME="linkage"><I>linkage-directive</I></A> :
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<A HREF="pragma.html#linkage">const linkage <I>linkage</I></A>
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<A HREF="pragma.html#linkage">external linkage <I>string-literal</I></A>
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<A HREF="pragma.html#linkage">external volatile_t</A>
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<A HREF="pragma.html#linkage">inline linkage <I>linkage</I></A>
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<A HREF="pragma.html#linkage">linkage resolution : <I>linkage-spec</I></A>
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<I>linkage</I> :
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external
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internal
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<I>linkage-spec</I> :
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( <I>linkage</I> ) on
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( <I>linkage</I> ) warning
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off
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<HR>
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<A NAME="misc"><I>misc-directive</I></A> :
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293 |
<A HREF="pragma.html#weak">argument <I>type-id</I> as ...</A>
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294 |
<A HREF="pragma.html#weak">argument <I>type-id</I> as <I>type-id</I></A>
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295 |
<A HREF="pragma.html#compatible">compatible type : <I>type-id</I> == <I>type-id</I> : <I>allow</I></A>
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296 |
<A HREF="pragma.html#conv">conversion <I>identifier-list</I> allow</A>
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297 |
<A HREF="dump.html#scope">declaration block <I>identifier</I> begin</A>
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298 |
<A HREF="dump.html#scope">declaration block end</A>
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299 |
<A HREF="pragma.html#ppdir">directive <I>directive-spec directive-state</I></A>
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300 |
<A HREF="pragma.html#variable">discard <I>expression</I></A>
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301 |
<A HREF="pragma.html#switch">exhaustive</A>
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|
302 |
<A HREF="pragma.html#cast">explicit cast <I>cast-spec<SUB>opt</SUB> allow</I></A>
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303 |
<A HREF="pragma.html#include">includes depth <I>integer-literal</I></A>
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304 |
<A HREF="pragma.html#static">preserve <I>preserve-list</I></A>
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305 |
<A HREF="pragma.html#variable">set <I>expression</I></A>
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306 |
<A HREF="pragma.html#limits">set error limit <I>integer-literal</I></A>
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307 |
<A HREF="pragma.html#identifier">set name limit <I>integer-literal</I> warning<I><SUB>opt</SUB></I></A>
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308 |
<A HREF="pragma.html#discard">suspend static <I>identifier-list</I></A>
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309 |
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310 |
<I>directive-spec</I> :
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311 |
assert
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312 |
file
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313 |
ident
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314 |
import
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315 |
include_next
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|
316 |
unassert
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317 |
warning
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318 |
weak
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319 |
|
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320 |
<I>directive-state</I> :
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|
321 |
allow
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322 |
warning
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|
323 |
disallow
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|
324 |
( ignore ) allow
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|
325 |
( ignore ) warning
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|
326 |
|
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327 |
<I>cast-operator</I> :
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328 |
static_cast
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329 |
const_cast
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|
330 |
reinterpret_cast
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|
331 |
|
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332 |
<I>cast-spec</I> :
|
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|
333 |
as <I>cast-operator</I>
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|
334 |
<I>cast-spec</I> | <I>cast-operator</I>
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|
335 |
|
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|
336 |
<I>preserve-list</I> :
|
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|
337 |
<I>identifier-list</I>
|
|
|
338 |
*
|
|
|
339 |
|
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|
340 |
<I>identifier-list</I> :
|
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|
341 |
<I>identifier identifier-list<SUB>opt</SUB></I>
|
|
|
342 |
|
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|
343 |
<HR>
|
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|
344 |
<A NAME="token"><I>token-directive</I></A> :
|
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|
345 |
<A HREF="token.html#spec">token <I>token-spec</I></A>
|
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|
346 |
<A HREF="token.html#tokdef">no_def <I>token-list</I></A>
|
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|
347 |
<A HREF="token.html#tokdef">define <I>token-list</I></A>
|
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|
348 |
<A HREF="token.html#tokdef">ignore <I>token-list</I></A>
|
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|
349 |
<A HREF="token.html#tokdef">interface <I>token-list</I></A>
|
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|
350 |
<A HREF="token.html#tokdef">undef token <I>token-list</I></A>
|
|
|
351 |
<A HREF="token.html#tokdef">extend interface <I>header-name</I></A>
|
|
|
352 |
<A HREF="token.html#tokdef">implement interface <I>header-name</I></A>
|
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|
353 |
|
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|
354 |
<A NAME="token1"><I>tendra-token-directive</I></A> :
|
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|
355 |
<A HREF="token.html#spec">token <I>token-spec</I></A>
|
|
|
356 |
<A HREF="token.html#tokdef">no_def <I>token-list</I></A>
|
|
|
357 |
<A HREF="token.html#tokdef">define <I>token-list</I></A>
|
|
|
358 |
<A HREF="token.html#tokdef">reject <I>token-list</I></A>
|
|
|
359 |
<A HREF="token.html#tokdef">interface <I>token-list</I></A>
|
|
|
360 |
<A HREF="token.html#tokdef">undef token <I>token-list</I></A>
|
|
|
361 |
<A HREF="token.html#tokdef">extend <I>header-name</I></A>
|
|
|
362 |
<A HREF="token.html#tokdef">implement <I>header-name</I></A>
|
|
|
363 |
<A HREF="token.html#tokdef">member definition <I>type-id</I> : <I>identifier member-offset</I></A>
|
|
|
364 |
|
|
|
365 |
<I>member-offset</I> :
|
|
|
366 |
::<I><SUB>opt</SUB> id-expression</I>
|
|
|
367 |
<I>member-offset</I> . ::<I><SUB>opt</SUB> id-expression</I>
|
|
|
368 |
<I>member-offset</I> [ <I>constant-expression</I> ]
|
|
|
369 |
|
|
|
370 |
<I>token-list</I> :
|
|
|
371 |
<I>token-id token-list<SUB>opt</SUB></I>
|
|
|
372 |
# <I>preproc-token-list</I>
|
|
|
373 |
|
|
|
374 |
<I>token-id</I> :
|
|
|
375 |
<I>token-namespace<SUB>opt</SUB> identifier</I>
|
|
|
376 |
<I>type-id</I> . <I>identifier</I>
|
|
|
377 |
|
|
|
378 |
<HR>
|
|
|
379 |
<I>token-spec</I> :
|
|
|
380 |
<I>token-introduction token-identification</I>
|
|
|
381 |
|
|
|
382 |
<I>token-introduction</I> :
|
|
|
383 |
<I>exp-token</I>
|
|
|
384 |
<I>statement-token</I>
|
|
|
385 |
<I>type-token</I>
|
|
|
386 |
<I>member-token</I>
|
|
|
387 |
<I>procedure-token</I>
|
|
|
388 |
|
|
|
389 |
<I>token-identification</I> :
|
|
|
390 |
<I>token-namespace<SUB>opt</SUB> identifier</I> # <I>external-identifier<SUB>opt</SUB></I>
|
|
|
391 |
|
|
|
392 |
<I>token-namespace</I> :
|
|
|
393 |
TAG
|
|
|
394 |
|
|
|
395 |
<I>external-identifier</I> :
|
|
|
396 |
-
|
|
|
397 |
<I>preproc-token-list</I>
|
|
|
398 |
|
|
|
399 |
<I>exp-token</I> :
|
|
|
400 |
EXP <I>exp-storage<SUB>opt</SUB></I> : <I>type-id</I> :
|
|
|
401 |
NAT
|
|
|
402 |
INTEGER
|
|
|
403 |
|
|
|
404 |
<I>exp-storage</I> :
|
|
|
405 |
lvalue
|
|
|
406 |
rvalue
|
|
|
407 |
const
|
|
|
408 |
|
|
|
409 |
<I>statement-token</I> :
|
|
|
410 |
STATEMENT
|
|
|
411 |
|
|
|
412 |
<I>type-token</I> :
|
|
|
413 |
TYPE
|
|
|
414 |
VARIETY
|
|
|
415 |
VARIETY signed
|
|
|
416 |
VARIETY unsigned
|
|
|
417 |
FLOAT
|
|
|
418 |
ARITHMETIC
|
|
|
419 |
SCALAR
|
|
|
420 |
CLASS
|
|
|
421 |
STRUCT
|
|
|
422 |
UNION
|
|
|
423 |
|
|
|
424 |
<I>member-token</I> :
|
|
|
425 |
MEMBER <I>access-specifier<SUB>opt</SUB> member-type-id</I> : <I>type-id</I> :
|
|
|
426 |
|
|
|
427 |
<I>member-type-id</I> :
|
|
|
428 |
<I>type-id</I>
|
|
|
429 |
<I>type-id</I> % <I>constant-expression</I>
|
|
|
430 |
|
|
|
431 |
<I>access-specifier</I> :
|
|
|
432 |
public
|
|
|
433 |
protected
|
|
|
434 |
private
|
|
|
435 |
|
|
|
436 |
<I>procedure-token</I> :
|
|
|
437 |
<I>general-procedure</I>
|
|
|
438 |
<I>simple-procedure</I>
|
|
|
439 |
<I>function-procedure</I>
|
|
|
440 |
|
|
|
441 |
<I>general-procedure</I> :
|
|
|
442 |
PROC { <I>bound-toks<SUB>opt</SUB></I> | <I>prog-pars<SUB>opt</SUB></I> } <I>token-introduction</I>
|
|
|
443 |
|
|
|
444 |
<I>bound-toks</I> :
|
|
|
445 |
<I>bound-token</I>
|
|
|
446 |
<I>bound-token</I> , <I>bound-toks</I>
|
|
|
447 |
|
|
|
448 |
<I>bound-token</I> :
|
|
|
449 |
<I>token-introduction token-namespace<SUB>opt</SUB> identifier</I>
|
|
|
450 |
|
|
|
451 |
<I>prog-pars</I> :
|
|
|
452 |
<I>program-parameter</I>
|
|
|
453 |
<I>program-parameter</I> , <I>prog-pars</I>
|
|
|
454 |
|
|
|
455 |
<I>program-parameter</I> :
|
|
|
456 |
EXP <I>identifier</I>
|
|
|
457 |
STATEMENT <I>identifier</I>
|
|
|
458 |
TYPE <I>type-id</I>
|
|
|
459 |
MEMBER <I>type-id</I> : <I>identifier</I>
|
|
|
460 |
PROC <I>identifier</I>
|
|
|
461 |
|
|
|
462 |
<I>simple-procedure</I> :
|
|
|
463 |
PROC ( <I>simple-toks<SUB>opt</SUB></I> ) <I>token-introduction</I>
|
|
|
464 |
|
|
|
465 |
<I>simple-toks</I> :
|
|
|
466 |
<I>simple-token</I>
|
|
|
467 |
<I>simple-token</I> , <I>simple-toks</I>
|
|
|
468 |
|
|
|
469 |
<I>simple-token</I> :
|
|
|
470 |
<I>token-introduction token-namespace<SUB>opt</SUB> identifier<SUB>opt</SUB></I>
|
|
|
471 |
|
|
|
472 |
<I>function-procedure</I> :
|
|
|
473 |
FUNC <I>type-id</I> :
|
|
|
474 |
</PRE>
|
|
|
475 |
</P>
|
|
|
476 |
|
|
|
477 |
<HR>
|
|
|
478 |
<P><I>Part of the <A HREF="../index.html">TenDRA Web</A>.<BR>Crown
|
|
|
479 |
Copyright © 1998.</I></P>
|
|
|
480 |
</BODY>
|
|
|
481 |
</HTML>
|