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TailcallVarargs (Luaj API)
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org.luaj.vm2</FONT>
<BR>
Class TailcallVarargs</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">org.luaj.vm2.Varargs</A>
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>org.luaj.vm2.TailcallVarargs</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>TailcallVarargs</B><DT>extends <A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A></DL>
</PRE>
<P>
Subclass of <A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2"><CODE>Varargs</CODE></A> that represents a lua tail call
in a Java library function execution environment.
<p>
Since Java doesn't have direct support for tail calls,
any lua function whose <A HREF="../../../org/luaj/vm2/Prototype.html" title="class in org.luaj.vm2"><CODE>Prototype</CODE></A> contains the
<A HREF="../../../org/luaj/vm2/Lua.html#OP_TAILCALL"><CODE>Lua.OP_TAILCALL</CODE></A> bytecode needs a mechanism
for tail calls when converting lua-bytecode to java-bytecode.
<p>
The tail call holds the next function and arguments,
and the client a call to <A HREF="../../../org/luaj/vm2/TailcallVarargs.html#eval()"><CODE>eval()</CODE></A> executes the function
repeatedly until the tail calls are completed.
<p>
Normally, users of luaj need not concern themselves with the
details of this mechanism, as it is built into the core
execution framework.
<P>
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/luaj/vm2/Prototype.html" title="class in org.luaj.vm2"><CODE>Prototype</CODE></A>,
<CODE>LuaJC</CODE></DL>
<HR>
<P>
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<B>Constructor Summary</B></FONT></TH>
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<TD><CODE><B><A HREF="../../../org/luaj/vm2/TailcallVarargs.html#TailcallVarargs(org.luaj.vm2.LuaValue, org.luaj.vm2.LuaValue, org.luaj.vm2.Varargs)">TailcallVarargs</A></B>(<A HREF="../../../org/luaj/vm2/LuaValue.html" title="class in org.luaj.vm2">LuaValue</A>&nbsp;object,
<A HREF="../../../org/luaj/vm2/LuaValue.html" title="class in org.luaj.vm2">LuaValue</A>&nbsp;methodname,
<A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A>&nbsp;args)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../org/luaj/vm2/TailcallVarargs.html#TailcallVarargs(org.luaj.vm2.LuaValue, org.luaj.vm2.Varargs)">TailcallVarargs</A></B>(<A HREF="../../../org/luaj/vm2/LuaValue.html" title="class in org.luaj.vm2">LuaValue</A>&nbsp;f,
<A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A>&nbsp;args)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../org/luaj/vm2/LuaValue.html" title="class in org.luaj.vm2">LuaValue</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/luaj/vm2/TailcallVarargs.html#arg(int)">arg</A></B>(int&nbsp;i)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the n-th argument value (1-based).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../org/luaj/vm2/LuaValue.html" title="class in org.luaj.vm2">LuaValue</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/luaj/vm2/TailcallVarargs.html#arg1()">arg1</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the first argument in the list.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/luaj/vm2/TailcallVarargs.html#eval()">eval</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Evaluate any pending tail call and return result.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/luaj/vm2/TailcallVarargs.html#isTailcall()">isTailcall</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return true if this is a TailcallVarargs</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/luaj/vm2/TailcallVarargs.html#narg()">narg</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the number of arguments, or 0 if there are none.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_org.luaj.vm2.Varargs"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class org.luaj.vm2.<A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../org/luaj/vm2/Varargs.html#argcheck(boolean, int, java.lang.String)">argcheck</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkboolean(int)">checkboolean</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkclosure(int)">checkclosure</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkdouble(int)">checkdouble</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkfunction(int)">checkfunction</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkint(int)">checkint</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkinteger(int)">checkinteger</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkjstring(int)">checkjstring</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checklong(int)">checklong</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checknotnil(int)">checknotnil</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checknumber(int)">checknumber</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkstring(int)">checkstring</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checktable(int)">checktable</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkthread(int)">checkthread</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkuserdata(int)">checkuserdata</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkuserdata(int, java.lang.Class)">checkuserdata</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#checkvalue(int)">checkvalue</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#isfunction(int)">isfunction</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#isnil(int)">isnil</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#isnoneornil(int)">isnoneornil</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#isnumber(int)">isnumber</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#isstring(int)">isstring</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#istable(int)">istable</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#isthread(int)">isthread</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#isuserdata(int)">isuserdata</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#isvalue(int)">isvalue</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optboolean(int, boolean)">optboolean</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optclosure(int, org.luaj.vm2.LuaClosure)">optclosure</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optdouble(int, double)">optdouble</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optfunction(int, org.luaj.vm2.LuaFunction)">optfunction</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optint(int, int)">optint</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optinteger(int, org.luaj.vm2.LuaInteger)">optinteger</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optjstring(int, java.lang.String)">optjstring</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optlong(int, long)">optlong</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optnumber(int, org.luaj.vm2.LuaNumber)">optnumber</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optstring(int, org.luaj.vm2.LuaString)">optstring</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#opttable(int, org.luaj.vm2.LuaTable)">opttable</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optthread(int, org.luaj.vm2.LuaThread)">optthread</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optuserdata(int, java.lang.Class, java.lang.Object)">optuserdata</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optuserdata(int, java.lang.Object)">optuserdata</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#optvalue(int, org.luaj.vm2.LuaValue)">optvalue</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#subargs(int)">subargs</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#toboolean(int)">toboolean</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#tobyte(int)">tobyte</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#tochar(int)">tochar</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#todouble(int)">todouble</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#tofloat(int)">tofloat</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#toint(int)">toint</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#tojstring()">tojstring</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#tojstring(int)">tojstring</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#tolong(int)">tolong</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#toshort(int)">toshort</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#toString()">toString</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#touserdata(int)">touserdata</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#touserdata(int, java.lang.Class)">touserdata</A>, <A HREF="../../../org/luaj/vm2/Varargs.html#type(int)">type</A></CODE></TD>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<A NAME="TailcallVarargs(org.luaj.vm2.LuaValue, org.luaj.vm2.Varargs)"><!-- --></A><H3>
TailcallVarargs</H3>
<PRE>
public <B>TailcallVarargs</B>(<A HREF="../../../org/luaj/vm2/LuaValue.html" title="class in org.luaj.vm2">LuaValue</A>&nbsp;f,
<A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A>&nbsp;args)</PRE>
<DL>
</DL>
<HR>
<A NAME="TailcallVarargs(org.luaj.vm2.LuaValue, org.luaj.vm2.LuaValue, org.luaj.vm2.Varargs)"><!-- --></A><H3>
TailcallVarargs</H3>
<PRE>
public <B>TailcallVarargs</B>(<A HREF="../../../org/luaj/vm2/LuaValue.html" title="class in org.luaj.vm2">LuaValue</A>&nbsp;object,
<A HREF="../../../org/luaj/vm2/LuaValue.html" title="class in org.luaj.vm2">LuaValue</A>&nbsp;methodname,
<A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A>&nbsp;args)</PRE>
<DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="isTailcall()"><!-- --></A><H3>
isTailcall</H3>
<PRE>
public boolean <B>isTailcall</B>()</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../org/luaj/vm2/Varargs.html#isTailcall()">Varargs</A></CODE></B></DD>
<DD>Return true if this is a TailcallVarargs
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../org/luaj/vm2/Varargs.html#isTailcall()">isTailcall</A></CODE> in class <CODE><A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>true if a tail call, false otherwise</DL>
</DD>
</DL>
<HR>
<A NAME="eval()"><!-- --></A><H3>
eval</H3>
<PRE>
public <A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A> <B>eval</B>()</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../org/luaj/vm2/Varargs.html#eval()">Varargs</A></CODE></B></DD>
<DD>Evaluate any pending tail call and return result.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../org/luaj/vm2/Varargs.html#eval()">eval</A></CODE> in class <CODE><A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the evaluated tail call result</DL>
</DD>
</DL>
<HR>
<A NAME="arg(int)"><!-- --></A><H3>
arg</H3>
<PRE>
public <A HREF="../../../org/luaj/vm2/LuaValue.html" title="class in org.luaj.vm2">LuaValue</A> <B>arg</B>(int&nbsp;i)</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../org/luaj/vm2/Varargs.html#arg(int)">Varargs</A></CODE></B></DD>
<DD>Get the n-th argument value (1-based).
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/luaj/vm2/Varargs.html#arg(int)">arg</A></CODE> in class <CODE><A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>i</CODE> - the index of the argument to get, 1 is the first argument
<DT><B>Returns:</B><DD>Value at position i, or LuaValue.NIL if there is none.<DT><B>See Also:</B><DD><A HREF="../../../org/luaj/vm2/Varargs.html#arg1()"><CODE>Varargs.arg1()</CODE></A>,
<A HREF="../../../org/luaj/vm2/LuaValue.html#NIL"><CODE>LuaValue.NIL</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="arg1()"><!-- --></A><H3>
arg1</H3>
<PRE>
public <A HREF="../../../org/luaj/vm2/LuaValue.html" title="class in org.luaj.vm2">LuaValue</A> <B>arg1</B>()</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../org/luaj/vm2/Varargs.html#arg1()">Varargs</A></CODE></B></DD>
<DD>Get the first argument in the list.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/luaj/vm2/Varargs.html#arg1()">arg1</A></CODE> in class <CODE><A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>LuaValue which is first in the list, or LuaValue.NIL if there are no values.<DT><B>See Also:</B><DD><A HREF="../../../org/luaj/vm2/Varargs.html#arg(int)"><CODE>Varargs.arg(int)</CODE></A>,
<A HREF="../../../org/luaj/vm2/LuaValue.html#NIL"><CODE>LuaValue.NIL</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="narg()"><!-- --></A><H3>
narg</H3>
<PRE>
public int <B>narg</B>()</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../org/luaj/vm2/Varargs.html#narg()">Varargs</A></CODE></B></DD>
<DD>Get the number of arguments, or 0 if there are none.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/luaj/vm2/Varargs.html#narg()">narg</A></CODE> in class <CODE><A HREF="../../../org/luaj/vm2/Varargs.html" title="class in org.luaj.vm2">Varargs</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>number of arguments.</DL>
</DD>
</DL>
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