org.luaj.vm2
Class Varargs

java.lang.Object
  extended by org.luaj.vm2.Varargs
Direct Known Subclasses:
LuaValue, TailcallVarargs

public abstract class Varargs
extends java.lang.Object

Class to encapsulate varargs values, either as part of a variable argument list, or multiple return values.

To construct varargs, use one of the static methods such as LuaValue.varargsOf(LuaValue,LuaValue)

Any LuaValue can be used as a stand-in for Varargs, for both calls and return values. When doing so, nargs() will return 1 and arg1() or arg(1) will return this. This simplifies the case when calling or implementing varargs functions with only 1 argument or 1 return value.

Varargs can also be derived from other varargs by appending to the front with a call such as LuaValue.varargsOf(LuaValue,Varargs) or by taking a portion of the args using Varargs.subargs(int start)

See Also:
LuaValue.varargsOf(LuaValue[]), LuaValue.varargsOf(LuaValue, Varargs), LuaValue.varargsOf(LuaValue[], Varargs), LuaValue.varargsOf(LuaValue, LuaValue, Varargs), LuaValue.varargsOf(LuaValue[], int, int), LuaValue.varargsOf(LuaValue[], int, int, Varargs), LuaValue.subargs(int)

Constructor Summary
Varargs()
           
 
Method Summary
abstract  LuaValue arg(int i)
          Get the n-th argument value (1-based).
abstract  LuaValue arg1()
          Get the first argument in the list.
 void argcheck(boolean test, int i, java.lang.String msg)
          Performs test on argument i as a LuaValue when a user-supplied assertion passes, or throw an error.
 boolean checkboolean(int i)
          Return argument i as a boolean value, or throw an error if any other type.
 LuaClosure checkclosure(int i)
          Return argument i as a closure, or throw an error if any other type.
 double checkdouble(int i)
          Return argument i as a double, or throw an error if it cannot be converted to one.
 LuaFunction checkfunction(int i)
          Return argument i as a function, or throw an error if an incompatible type.
 int checkint(int i)
          Return argument i as a java int value, discarding any fractional part, or throw an error if not a number.
 LuaInteger checkinteger(int i)
          Return argument i as a java int value, or throw an error if not a number or is not representable by a java int.
 java.lang.String checkjstring(int i)
          Return argument i as a java String if a string or number, or throw an error if any other type
 long checklong(int i)
          Return argument i as a java long value, discarding any fractional part, or throw an error if not a number.
 LuaValue checknotnil(int i)
          Return argument i as a LuaValue if it is not nil, or throw an error if it is nil.
 LuaNumber checknumber(int i)
          Return argument i as a LuaNumber, or throw an error if not a number or string that can be converted to a number.
 LuaString checkstring(int i)
          Return argument i as a LuaString if a string or number, or throw an error if any other type
 LuaTable checktable(int i)
          Return argument i as a LuaTable if a lua table, or throw an error if any other type.
 LuaThread checkthread(int i)
          Return argument i as a LuaThread if a lua thread, or throw an error if any other type.
 java.lang.Object checkuserdata(int i)
          Return argument i as a java Object if a userdata, or throw an error if any other type.
 java.lang.Object checkuserdata(int i, java.lang.Class c)
          Return argument i as a java Object if it is a userdata whose instance Class c or a subclass, or throw an error if any other type.
 LuaValue checkvalue(int i)
          Return argument i as a LuaValue if it exists, or throw an error.
 Varargs eval()
          Evaluate any pending tail call and return result.
 boolean isfunction(int i)
          Tests if argument i is a function.
 boolean isnil(int i)
          Tests if argument i is nil.
 boolean isnoneornil(int i)
          Return true if there is no argument or nil at argument i.
 boolean isnumber(int i)
          Tests if argument i is a number.
 boolean isstring(int i)
          Tests if argument i is a string.
 boolean istable(int i)
          Tests if argument i is a table.
 boolean isTailcall()
          Return true if this is a TailcallVarargs
 boolean isthread(int i)
          Tests if argument i is a thread.
 boolean isuserdata(int i)
          Tests if argument i is a userdata.
 boolean isvalue(int i)
          Tests if a value exists at argument i.
abstract  int narg()
          Get the number of arguments, or 0 if there are none.
 boolean optboolean(int i, boolean defval)
          Return argument i as a boolean value, defval if nil, or throw a LuaError if any other type.
 LuaClosure optclosure(int i, LuaClosure defval)
          Return argument i as a closure, defval if nil, or throw a LuaError if any other type.
 double optdouble(int i, double defval)
          Return argument i as a double, defval if nil, or throw a LuaError if it cannot be converted to one.
 LuaFunction optfunction(int i, LuaFunction defval)
          Return argument i as a function, defval if nil, or throw a LuaError if an incompatible type.
 int optint(int i, int defval)
          Return argument i as a java int value, discarding any fractional part, defval if nil, or throw a LuaError if not a number.
 LuaInteger optinteger(int i, LuaInteger defval)
          Return argument i as a java int value, defval if nil, or throw a LuaError if not a number or is not representable by a java int.
 java.lang.String optjstring(int i, java.lang.String defval)
          Return argument i as a java String if a string or number, defval if nil, or throw a LuaError if any other type
 long optlong(int i, long defval)
          Return argument i as a java long value, discarding any fractional part, defval if nil, or throw a LuaError if not a number.
 LuaNumber optnumber(int i, LuaNumber defval)
          Return argument i as a LuaNumber, defval if nil, or throw a LuaError if not a number or string that can be converted to a number.
 LuaString optstring(int i, LuaString defval)
          Return argument i as a LuaString if a string or number, defval if nil, or throw a LuaError if any other type
 LuaTable opttable(int i, LuaTable defval)
          Return argument i as a LuaTable if a lua table, defval if nil, or throw a LuaError if any other type.
 LuaThread optthread(int i, LuaThread defval)
          Return argument i as a LuaThread if a lua thread, defval if nil, or throw a LuaError if any other type.
 java.lang.Object optuserdata(int i, java.lang.Class c, java.lang.Object defval)
          Return argument i as a java Object if it is a userdata whose instance Class c or a subclass, defval if nil, or throw a LuaError if any other type.
 java.lang.Object optuserdata(int i, java.lang.Object defval)
          Return argument i as a java Object if a userdata, defval if nil, or throw a LuaError if any other type.
 LuaValue optvalue(int i, LuaValue defval)
          Return argument i as a LuaValue if it exists, or defval.
abstract  Varargs subargs(int start)
          Create a Varargs instance containing arguments starting at index start
 boolean toboolean(int i)
          Convert argument i to java boolean based on lua rules for boolean evaluation.
 byte tobyte(int i)
          Return argument i as a java byte value, discarding any fractional part and truncating, or 0 if not a number.
 char tochar(int i)
          Return argument i as a java char value, discarding any fractional part and truncating, or 0 if not a number.
 double todouble(int i)
          Return argument i as a java double value or 0 if not a number.
 float tofloat(int i)
          Return argument i as a java float value, discarding excess fractional part and truncating, or 0 if not a number.
 int toint(int i)
          Return argument i as a java int value, discarding any fractional part and truncating, or 0 if not a number.
 java.lang.String tojstring()
          Convert the list of varargs values to a human readable java String.
 java.lang.String tojstring(int i)
          Return argument i as a java String based on the type of the argument.
 long tolong(int i)
          Return argument i as a java long value, discarding any fractional part and truncating, or 0 if not a number.
 short toshort(int i)
          Return argument i as a java short value, discarding any fractional part and truncating, or 0 if not a number.
 java.lang.String toString()
          Convert the value or values to a java String using Varargs.tojstring()
 java.lang.Object touserdata(int i)
          Return argument i as a java Object if a userdata, or null.
 java.lang.Object touserdata(int i, java.lang.Class c)
          Return argument i as a java Object if it is a userdata whose instance Class c or a subclass, or null.
 int type(int i)
          Gets the type of argument i
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

Varargs

public Varargs()
Method Detail

arg

public abstract LuaValue arg(int i)
Get the n-th argument value (1-based).

Parameters:
i - the index of the argument to get, 1 is the first argument
Returns:
Value at position i, or LuaValue.NIL if there is none.
See Also:
arg1(), LuaValue.NIL

narg

public abstract int narg()
Get the number of arguments, or 0 if there are none.

Returns:
number of arguments.

arg1

public abstract LuaValue arg1()
Get the first argument in the list.

Returns:
LuaValue which is first in the list, or LuaValue.NIL if there are no values.
See Also:
arg(int), LuaValue.NIL

eval

public Varargs eval()
Evaluate any pending tail call and return result.

Returns:
the evaluated tail call result

isTailcall

public boolean isTailcall()
Return true if this is a TailcallVarargs

Returns:
true if a tail call, false otherwise

type

public int type(int i)
Gets the type of argument i

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
int value corresponding to one of the LuaValue integer type values
See Also:
LuaValue.TNIL, LuaValue.TBOOLEAN, LuaValue.TNUMBER, LuaValue.TSTRING, LuaValue.TTABLE, LuaValue.TFUNCTION, LuaValue.TUSERDATA, LuaValue.TTHREAD

isnil

public boolean isnil(int i)
Tests if argument i is nil.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if the argument is nil or does not exist, false otherwise
See Also:
LuaValue.TNIL

isfunction

public boolean isfunction(int i)
Tests if argument i is a function.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if the argument exists and is a function or closure, false otherwise
See Also:
LuaValue.TFUNCTION

isnumber

public boolean isnumber(int i)
Tests if argument i is a number. Since anywhere a number is required, a string can be used that is a number, this will return true for both numbers and strings that can be interpreted as numbers.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if the argument exists and is a number or string that can be interpreted as a number, false otherwise
See Also:
LuaValue.TNUMBER, LuaValue.TSTRING

isstring

public boolean isstring(int i)
Tests if argument i is a string. Since all lua numbers can be used where strings are used, this will return true for both strings and numbers.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if the argument exists and is a string or number, false otherwise
See Also:
LuaValue.TNUMBER, LuaValue.TSTRING

istable

public boolean istable(int i)
Tests if argument i is a table.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if the argument exists and is a lua table, false otherwise
See Also:
LuaValue.TTABLE

isthread

public boolean isthread(int i)
Tests if argument i is a thread.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if the argument exists and is a lua thread, false otherwise
See Also:
LuaValue.TTHREAD

isuserdata

public boolean isuserdata(int i)
Tests if argument i is a userdata.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if the argument exists and is a userdata, false otherwise
See Also:
LuaValue.TUSERDATA

isvalue

public boolean isvalue(int i)
Tests if a value exists at argument i.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if the argument exists, false otherwise

optboolean

public boolean optboolean(int i,
                          boolean defval)
Return argument i as a boolean value, defval if nil, or throw a LuaError if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if argument i is boolean true, false if it is false, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a lua boolean

optclosure

public LuaClosure optclosure(int i,
                             LuaClosure defval)
Return argument i as a closure, defval if nil, or throw a LuaError if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaClosure if argument i is a closure, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a lua closure

optdouble

public double optdouble(int i,
                        double defval)
Return argument i as a double, defval if nil, or throw a LuaError if it cannot be converted to one.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
java double value if argument i is a number or string that converts to a number, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a number

optfunction

public LuaFunction optfunction(int i,
                               LuaFunction defval)
Return argument i as a function, defval if nil, or throw a LuaError if an incompatible type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaValue that can be called if argument i is lua function or closure, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a lua function or closure

optint

public int optint(int i,
                  int defval)
Return argument i as a java int value, discarding any fractional part, defval if nil, or throw a LuaError if not a number.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
int value with fraction discarded and truncated if necessary if argument i is number, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a number

optinteger

public LuaInteger optinteger(int i,
                             LuaInteger defval)
Return argument i as a java int value, defval if nil, or throw a LuaError if not a number or is not representable by a java int.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaInteger value that fits in a java int without rounding, or defval if not supplied or nil
Throws:
LuaError - if the argument cannot be represented by a java int value

optlong

public long optlong(int i,
                    long defval)
Return argument i as a java long value, discarding any fractional part, defval if nil, or throw a LuaError if not a number.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
long value with fraction discarded and truncated if necessary if argument i is number, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a number

optnumber

public LuaNumber optnumber(int i,
                           LuaNumber defval)
Return argument i as a LuaNumber, defval if nil, or throw a LuaError if not a number or string that can be converted to a number.

Parameters:
i - the index of the argument to test, 1 is the first argument, or defval if not supplied or nil
Returns:
LuaNumber if argument i is number or can be converted to a number
Throws:
LuaError - if the argument is not a number

optjstring

public java.lang.String optjstring(int i,
                                   java.lang.String defval)
Return argument i as a java String if a string or number, defval if nil, or throw a LuaError if any other type

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
String value if argument i is a string or number, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a string or number

optstring

public LuaString optstring(int i,
                           LuaString defval)
Return argument i as a LuaString if a string or number, defval if nil, or throw a LuaError if any other type

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaString value if argument i is a string or number, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a string or number

opttable

public LuaTable opttable(int i,
                         LuaTable defval)
Return argument i as a LuaTable if a lua table, defval if nil, or throw a LuaError if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaTable value if a table, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a lua table

optthread

public LuaThread optthread(int i,
                           LuaThread defval)
Return argument i as a LuaThread if a lua thread, defval if nil, or throw a LuaError if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaThread value if a thread, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a lua thread

optuserdata

public java.lang.Object optuserdata(int i,
                                    java.lang.Object defval)
Return argument i as a java Object if a userdata, defval if nil, or throw a LuaError if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
java Object value if argument i is a userdata, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a userdata

optuserdata

public java.lang.Object optuserdata(int i,
                                    java.lang.Class c,
                                    java.lang.Object defval)
Return argument i as a java Object if it is a userdata whose instance Class c or a subclass, defval if nil, or throw a LuaError if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
c - the class to which the userdata instance must be assignable
Returns:
java Object value if argument i is a userdata whose instance Class c or a subclass, or defval if not supplied or nil
Throws:
LuaError - if the argument is not a userdata or from whose instance c is not assignable

optvalue

public LuaValue optvalue(int i,
                         LuaValue defval)
Return argument i as a LuaValue if it exists, or defval.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaValue value if the argument exists, defval if not
Throws:
LuaError - if the argument does not exist.

checkboolean

public boolean checkboolean(int i)
Return argument i as a boolean value, or throw an error if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if argument i is boolean true, false if it is false
Throws:
LuaError - if the argument is not a lua boolean

checkclosure

public LuaClosure checkclosure(int i)
Return argument i as a closure, or throw an error if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaClosure if argument i is a closure.
Throws:
LuaError - if the argument is not a lua closure

checkdouble

public double checkdouble(int i)
Return argument i as a double, or throw an error if it cannot be converted to one.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
java double value if argument i is a number or string that converts to a number
Throws:
LuaError - if the argument is not a number

checkfunction

public LuaFunction checkfunction(int i)
Return argument i as a function, or throw an error if an incompatible type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaValue that can be called if argument i is lua function or closure
Throws:
LuaError - if the argument is not a lua function or closure

checkint

public int checkint(int i)
Return argument i as a java int value, discarding any fractional part, or throw an error if not a number.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
int value with fraction discarded and truncated if necessary if argument i is number
Throws:
LuaError - if the argument is not a number

checkinteger

public LuaInteger checkinteger(int i)
Return argument i as a java int value, or throw an error if not a number or is not representable by a java int.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaInteger value that fits in a java int without rounding
Throws:
LuaError - if the argument cannot be represented by a java int value

checklong

public long checklong(int i)
Return argument i as a java long value, discarding any fractional part, or throw an error if not a number.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
long value with fraction discarded and truncated if necessary if argument i is number
Throws:
LuaError - if the argument is not a number

checknumber

public LuaNumber checknumber(int i)
Return argument i as a LuaNumber, or throw an error if not a number or string that can be converted to a number.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaNumber if argument i is number or can be converted to a number
Throws:
LuaError - if the argument is not a number

checkjstring

public java.lang.String checkjstring(int i)
Return argument i as a java String if a string or number, or throw an error if any other type

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
String value if argument i is a string or number
Throws:
LuaError - if the argument is not a string or number

checkstring

public LuaString checkstring(int i)
Return argument i as a LuaString if a string or number, or throw an error if any other type

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaString value if argument i is a string or number
Throws:
LuaError - if the argument is not a string or number

checktable

public LuaTable checktable(int i)
Return argument i as a LuaTable if a lua table, or throw an error if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaTable value if a table
Throws:
LuaError - if the argument is not a lua table

checkthread

public LuaThread checkthread(int i)
Return argument i as a LuaThread if a lua thread, or throw an error if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaThread value if a thread
Throws:
LuaError - if the argument is not a lua thread

checkuserdata

public java.lang.Object checkuserdata(int i)
Return argument i as a java Object if a userdata, or throw an error if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
java Object value if argument i is a userdata
Throws:
LuaError - if the argument is not a userdata

checkuserdata

public java.lang.Object checkuserdata(int i,
                                      java.lang.Class c)
Return argument i as a java Object if it is a userdata whose instance Class c or a subclass, or throw an error if any other type.

Parameters:
i - the index of the argument to test, 1 is the first argument
c - the class to which the userdata instance must be assignable
Returns:
java Object value if argument i is a userdata whose instance Class c or a subclass
Throws:
LuaError - if the argument is not a userdata or from whose instance c is not assignable

checkvalue

public LuaValue checkvalue(int i)
Return argument i as a LuaValue if it exists, or throw an error.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaValue value if the argument exists
Throws:
LuaError - if the argument does not exist.

checknotnil

public LuaValue checknotnil(int i)
Return argument i as a LuaValue if it is not nil, or throw an error if it is nil.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
LuaValue value if the argument is not nil
Throws:
LuaError - if the argument doesn't exist or evaluates to nil.

argcheck

public void argcheck(boolean test,
                     int i,
                     java.lang.String msg)
Performs test on argument i as a LuaValue when a user-supplied assertion passes, or throw an error. Returns normally if the value of test is true, otherwise throws and argument error with the supplied message, msg.

Parameters:
test - user supplied assertion to test against
i - the index to report in any error message
msg - the error message to use when the test fails
Throws:
LuaError - if the the value of test is false

isnoneornil

public boolean isnoneornil(int i)
Return true if there is no argument or nil at argument i.

Parameters:
i - the index of the argument to test, 1 is the first argument
Returns:
true if argument i contains either no argument or nil

toboolean

public boolean toboolean(int i)
Convert argument i to java boolean based on lua rules for boolean evaluation.

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
false if argument i is nil or false, otherwise true

tobyte

public byte tobyte(int i)
Return argument i as a java byte value, discarding any fractional part and truncating, or 0 if not a number.

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
byte value with fraction discarded and truncated if necessary if argument i is number, otherwise 0

tochar

public char tochar(int i)
Return argument i as a java char value, discarding any fractional part and truncating, or 0 if not a number.

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
char value with fraction discarded and truncated if necessary if argument i is number, otherwise 0

todouble

public double todouble(int i)
Return argument i as a java double value or 0 if not a number.

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
double value if argument i is number, otherwise 0

tofloat

public float tofloat(int i)
Return argument i as a java float value, discarding excess fractional part and truncating, or 0 if not a number.

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
float value with excess fraction discarded and truncated if necessary if argument i is number, otherwise 0

toint

public int toint(int i)
Return argument i as a java int value, discarding any fractional part and truncating, or 0 if not a number.

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
int value with fraction discarded and truncated if necessary if argument i is number, otherwise 0

tolong

public long tolong(int i)
Return argument i as a java long value, discarding any fractional part and truncating, or 0 if not a number.

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
long value with fraction discarded and truncated if necessary if argument i is number, otherwise 0

tojstring

public java.lang.String tojstring(int i)
Return argument i as a java String based on the type of the argument.

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
String value representing the type

toshort

public short toshort(int i)
Return argument i as a java short value, discarding any fractional part and truncating, or 0 if not a number.

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
short value with fraction discarded and truncated if necessary if argument i is number, otherwise 0

touserdata

public java.lang.Object touserdata(int i)
Return argument i as a java Object if a userdata, or null.

Parameters:
i - the index of the argument to convert, 1 is the first argument
Returns:
java Object value if argument i is a userdata, otherwise null

touserdata

public java.lang.Object touserdata(int i,
                                   java.lang.Class c)
Return argument i as a java Object if it is a userdata whose instance Class c or a subclass, or null.

Parameters:
i - the index of the argument to convert, 1 is the first argument
c - the class to which the userdata instance must be assignable
Returns:
java Object value if argument i is a userdata whose instance Class c or a subclass, otherwise null

tojstring

public java.lang.String tojstring()
Convert the list of varargs values to a human readable java String.

Returns:
String value in human readable form such as {1,2}.

toString

public java.lang.String toString()
Convert the value or values to a java String using Varargs.tojstring()

Overrides:
toString in class java.lang.Object
Returns:
String value in human readable form.
See Also:
tojstring()

subargs

public abstract Varargs subargs(int start)
Create a Varargs instance containing arguments starting at index start

Parameters:
start - the index from which to include arguments, where 1 is the first argument.
Returns:
Varargs containing argument { start, start+1, ... , narg-start-1 }


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