org.luaj.vm2

类 TailcallVarargs

java.lang.Object

org.luaj.vm2.Varargs

org.luaj.vm2.TailcallVarargs

public class TailcallVarargs
extends Varargs

Subclass of Varargs that represents a lua tail call in a Java library function execution environment.

Since Java doesn't have direct support for tail calls, any lua function whose Prototype contains the Lua.OP_TAILCALL bytecode needs a mechanism for tail calls when converting lua-bytecode to java-bytecode.

The tail call holds the next function and arguments, and the client a call to eval() executes the function repeatedly until the tail calls are completed.

Normally, users of luaj need not concern themselves with the details of this mechanism, as it is built into the core execution framework.

另请参阅:

Prototype, LuaJC

构造器概要

构造器

构造器和说明
TailcallVarargs(LuaValue object, LuaValue methodname, Varargs args)
TailcallVarargs(LuaValue f, Varargs args)

方法概要

限定符和类型	方法和说明
LuaValue	arg(int i) Get the n-th argument value (1-based).
LuaValue	arg1() Get the first argument in the list.
Varargs	eval() Evaluate any pending tail call and return result.
boolean	isTailcall() Return true if this is a TailcallVarargs
int	narg() Get the number of arguments, or 0 if there are none.
Varargs	subargs(int start) Create a Varargs instance containing arguments starting at index start

从类继承的方法 org.luaj.vm2.Varargs

argcheck, checkboolean, checkclosure, checkdouble, checkfunction, checkint, checkinteger, checkjstring, checklong, checknotnil, checknumber, checkstring, checktable, checkthread, checkuserdata, checkuserdata, checkvalue, dealias, isfunction, isnil, isnoneornil, isnumber, isstring, istable, isthread, isuserdata, isvalue, optboolean, optclosure, optdouble, optfunction, optint, optinteger, optjstring, optlong, optnumber, optstring, opttable, optthread, optuserdata, optuserdata, optvalue, toboolean, tobyte, tochar, todouble, tofloat, toint, tojstring, tojstring, tolong, toshort, toString, touserdata, touserdata, type

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

构造器详细资料

TailcallVarargs

public TailcallVarargs(LuaValue f,
                       Varargs args)

TailcallVarargs

public TailcallVarargs(LuaValue object,
                       LuaValue methodname,
                       Varargs args)

方法详细资料

isTailcall

public boolean isTailcall()

从类复制的说明: Varargs

Return true if this is a TailcallVarargs

覆盖:

isTailcall 在类中 Varargs

返回:

true if a tail call, false otherwise

eval

public Varargs eval()

从类复制的说明: Varargs

Evaluate any pending tail call and return result.

覆盖:

eval 在类中 Varargs

返回:

the evaluated tail call result

arg

public LuaValue arg(int i)

从类复制的说明: Varargs

Get the n-th argument value (1-based).

指定者:

arg 在类中 Varargs

参数:

i - the index of the argument to get, 1 is the first argument

返回:

Value at position i, or LuaValue.NIL if there is none.

另请参阅:

Varargs.arg1(), LuaValue.NIL

arg1

public LuaValue arg1()

从类复制的说明: Varargs

Get the first argument in the list.

指定者:

arg1 在类中 Varargs

返回:

LuaValue which is first in the list, or LuaValue.NIL if there are no values.

另请参阅:

Varargs.arg(int), LuaValue.NIL

narg

public int narg()

从类复制的说明: Varargs

Get the number of arguments, or 0 if there are none.

指定者:

narg 在类中 Varargs

返回:

number of arguments.

subargs

public Varargs subargs(int start)

从类复制的说明: Varargs

Create a Varargs instance containing arguments starting at index start

指定者:

subargs 在类中 Varargs

参数:

start - the index from which to include arguments, where 1 is the first argument.

返回:

Varargs containing argument { start, start+1, ... , narg-start-1 }