org.luaj.vm2

类 LuaNumber

java.lang.Object

org.luaj.vm2.Varargs

org.luaj.vm2.LuaValue

org.luaj.vm2.LuaNumber

直接已知子类:

LuaDouble, LuaInteger

public abstract class LuaNumber
extends LuaValue

Base class for representing numbers as lua values directly.

The main subclasses are LuaInteger which holds values that fit in a java int, and LuaDouble which holds all other number values.

另请参阅:

LuaInteger, LuaDouble, LuaValue

字段概要

字段

限定符和类型	字段和说明
static LuaValue	s_metatable Shared static metatable for all number values represented in lua.

从类继承的字段 org.luaj.vm2.LuaValue

ADD, BAND, BNOT, BOR, BXOR, CALL, CONCAT, DIV, EMPTYSTRING, ENV, EQ, FALSE, IDIV, INDEX, LE, LEN, LT, METATABLE, MINUSONE, MOD, MODE, MUL, NEWINDEX, NIL, NILS, NONE, NOVALS, ONE, POW, SHL, SHR, SUB, TBOOLEAN, TFUNCTION, TINT, TLIGHTUSERDATA, TNIL, TNONE, TNUMBER, TOSTRING, TRUE, TSTRING, TTABLE, TTHREAD, TUSERDATA, TVALUE, TYPE_NAMES, UNM, uservalue, ZERO

构造器概要

构造器

构造器和说明
LuaNumber()

方法概要

限定符和类型	方法和说明
LuaNumber	checknumber() Check that the value is numeric, and return as a LuaNumber if so, or throw LuaError Values that are LuaString that can be converted to a number will be converted and returned.
LuaNumber	checknumber(String errmsg) Check that the value is numeric, and return as a LuaNumber if so, or throw LuaError Values that are LuaString that can be converted to a number will be converted and returned.
Buffer	concat(Buffer rhs) Concatenate a Buffer onto this value and return the result using rules of lua string concatenation including metatag processing.
LuaValue	concat(LuaValue rhs) Concatenate another value onto this value and return the result using rules of lua string concatenation including metatag processing.
LuaValue	concatTo(LuaNumber lhs) Reverse-concatenation: concatenate this value onto another value known to be a LuaNumber and return the result using rules of lua string concatenation including metatag processing.
LuaValue	concatTo(LuaString lhs) Reverse-concatenation: concatenate this value onto another value known to be a LuaString and return the result using rules of lua string concatenation including metatag processing.
LuaValue	getmetatable() Get the metatable for this LuaValue For LuaTable and LuaUserdata instances, the metatable returned is this instance metatable.
boolean	isnumber() Check if this is a number
boolean	isstring() Check if this is a string
LuaNumber	optnumber(LuaNumber defval) Check that optional argument is a number or string convertible to number and return as LuaNumber
LuaValue	tonumber() Conditionally convert to lua number without throwing errors.
int	type() Get the enumeration value for the type of this value.
String	typename() Get the String name of the type of this value.

从类继承的方法 org.luaj.vm2.LuaValue

add, add, add, and, arg, arg1, argerror, argerror, aritherror, aritherror, arithmt, arithmtwith, assert_, band, band, bnot, bor, bor, buffer, bxor, bxor, call, call, call, call, call, callmt, checkboolean, checkclosure, checkdouble, checkfunction, checkglobals, checkint, checkinteger, checkjstring, checklong, checkmetatag, checknotnil, checkstring, checktable, checkthread, checkuserdata, checkuserdata, compareerror, compareerror, comparemt, concatmt, concatTo, div, div, div, divInto, eq_b, eq, eqmtcall, equals, error, get, get, get, getfenv, gettable, getuservalue, gt_b, gt_b, gt_b, gt, gt, gt, gteq_b, gteq_b, gteq_b, gteq, gteq, gteq, idiv, idiv, illegal, inext, initupvalue1, invoke, invoke, invoke, invoke, invoke, invoke, invokemethod, invokemethod, invokemethod, invokemethod, invokemethod, invokemethod, isboolean, isclosure, isfunction, isint, isinttype, islong, isnil, istable, isthread, isuserdata, isuserdata, isvalidkey, jcall, jget, jset, len, lenerror, length, listOf, listOf, load, lt_b, lt_b, lt_b, lt, lt, lt, lteq_b, lteq_b, lteq_b, lteq, lteq, lteq, metatableOf, metatag, method, method, method, method, method, method, mod, mod, mod, modFrom, mul, mul, mul, narg, neg, neq_b, neq, next, not, onInvoke, optboolean, optclosure, optdouble, optfunction, optint, optinteger, optjstring, optlong, optstring, opttable, optthread, optuserdata, optuserdata, optvalue, or, pow, pow, pow, powWith, powWith, presize, raweq, raweq, raweq, raweq, raweq, rawget, rawget, rawget, rawlen, rawset, rawset, rawset, rawset, rawset, rawset, rawset, rawsetlist, set, set, set, set, set, set, set, setfenv, setmetatable, settable, setuservalue, shl, shl, shr, shr, strcmp, strcmp, strongvalue, strvalue, sub, sub, sub, subargs, subFrom, subFrom, tableOf, tableOf, tableOf, tableOf, tableOf, tableOf, tailcallOf, testfor_b, toboolean, tobyte, tochar, todouble, tofloat, toint, tojstring, tolong, toshort, tostring, toString, touserdata, touserdata, typerror, unimplemented, userdataOf, userdataOf, valueOf, valueOf, valueOf, valueOf, valueOf, valueOf, valueOf, varargsOf, varargsOf, varargsOf, varargsOf, varargsOf, varargsOf

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, eval, isfunction, isnil, isnoneornil, isnumber, isstring, istable, isTailcall, 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, tolong, toshort, touserdata, touserdata, type

从类继承的方法 java.lang.Object

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

字段详细资料

s_metatable

public static LuaValue s_metatable

Shared static metatable for all number values represented in lua.

构造器详细资料

LuaNumber

public LuaNumber()

方法详细资料

type

public int type()

从类复制的说明: LuaValue

Get the enumeration value for the type of this value.

指定者:

type 在类中 LuaValue

返回:

value for this type, one of LuaValue.TNIL, LuaValue.TBOOLEAN, LuaValue.TNUMBER, LuaValue.TSTRING, LuaValue.TTABLE, LuaValue.TFUNCTION, LuaValue.TUSERDATA, LuaValue.TTHREAD

另请参阅:

LuaValue.typename()

typename

public String typename()

从类复制的说明: LuaValue

Get the String name of the type of this value.

指定者:

typename 在类中 LuaValue

返回:

name from type name list LuaValue.TYPE_NAMES corresponding to the type of this value: "nil", "boolean", "number", "string", "table", "function", "userdata", "thread"

另请参阅:

LuaValue.type()

checknumber

public LuaNumber checknumber()

从类复制的说明: LuaValue

Check that the value is numeric, and return as a LuaNumber if so, or throw LuaError

Values that are LuaString that can be converted to a number will be converted and returned.

覆盖:

checknumber 在类中 LuaValue

返回:

value as a LuaNumber if numeric

另请参阅:

LuaValue.checkint(), LuaValue.checkinteger(), LuaValue.checkdouble(), LuaValue.checklong(), LuaValue.optnumber(LuaNumber), LuaValue.TNUMBER

checknumber

public LuaNumber checknumber(String errmsg)

从类复制的说明: LuaValue

Check that the value is numeric, and return as a LuaNumber if so, or throw LuaError

Values that are LuaString that can be converted to a number will be converted and returned.

覆盖:

checknumber 在类中 LuaValue

参数:

errmsg - String message to supply if conversion fails

返回:

value as a LuaNumber if numeric

另请参阅:

LuaValue.checkint(), LuaValue.checkinteger(), LuaValue.checkdouble(), LuaValue.checklong(), LuaValue.optnumber(LuaNumber), LuaValue.TNUMBER

optnumber

public LuaNumber optnumber(LuaNumber defval)

从类复制的说明: LuaValue

Check that optional argument is a number or string convertible to number and return as LuaNumber

覆盖:

optnumber 在类中 LuaValue

参数:

defval - LuaNumber to return if this is nil or none

返回:

this cast to LuaNumber if numeric, defval if nil or none, throws LuaError otherwise

另请参阅:

LuaValue.optdouble(double), LuaValue.optlong(long), LuaValue.optint(int), LuaValue.checkint(), LuaValue.toint(), LuaValue.tonumber(), LuaValue.isnumber(), LuaValue.TNUMBER

tonumber

public LuaValue tonumber()

从类复制的说明: LuaValue

Conditionally convert to lua number without throwing errors.

In lua all numbers are strings, but not all strings are numbers. This function will return the LuaValue this if it is a number or a string convertible to a number, and LuaValue.NIL for all other cases.

This allows values to be tested for their "numeric-ness" without the penalty of throwing exceptions, nor the cost of converting the type and creating storage for it.

覆盖:

tonumber 在类中 LuaValue

返回:

this if it is a LuaNumber or LuaString that can be converted to a number, otherwise LuaValue.NIL

另请参阅:

LuaValue.tostring(), LuaValue.optnumber(LuaNumber), LuaValue.checknumber(), LuaValue.toint(), LuaValue.todouble()

isnumber

public boolean isnumber()

从类复制的说明: LuaValue

Check if this is a number

覆盖:

isnumber 在类中 LuaValue

返回:

true if this is a number, meaning derives from LuaNumber or derives from LuaString and is convertible to a number, otherwise false

另请参阅:

LuaValue.tonumber(), LuaValue.checknumber(), LuaValue.optnumber(LuaNumber), LuaValue.TNUMBER

isstring

public boolean isstring()

从类复制的说明: LuaValue

Check if this is a string

覆盖:

isstring 在类中 LuaValue

返回:

true if this is a string, meaning derives from LuaString or LuaNumber, otherwise false

另请参阅:

LuaValue.tostring(), LuaValue.checkstring(), LuaValue.optstring(LuaString), LuaValue.TSTRING

getmetatable

public LuaValue getmetatable()

从类复制的说明: LuaValue

Get the metatable for this LuaValue

For LuaTable and LuaUserdata instances, the metatable returned is this instance metatable. For all other types, the class metatable value will be returned.

覆盖:

getmetatable 在类中 LuaValue

返回:

metatable, or null if it there is none

另请参阅:

LuaBoolean.s_metatable, s_metatable, LuaNil.s_metatable, LuaFunction.s_metatable, LuaThread.s_metatable

concat

public LuaValue concat(LuaValue rhs)

从类复制的说明: LuaValue

Concatenate another value onto this value and return the result using rules of lua string concatenation including metatag processing.

Only strings and numbers as represented can be concatenated, meaning each operand must derive from LuaString or LuaNumber.

覆盖:

concat 在类中 LuaValue

参数:

rhs - The right-hand-side value to perform the operation with

返回:

LuaValue resulting from concatenation of (this .. rhs)

concat

public Buffer concat(Buffer rhs)

从类复制的说明: LuaValue

Concatenate a Buffer onto this value and return the result using rules of lua string concatenation including metatag processing.

Only strings and numbers as represented can be concatenated, meaning each operand must derive from LuaString or LuaNumber.

覆盖:

concat 在类中 LuaValue

参数:

rhs - The right-hand-side Buffer to perform the operation with

返回:

LuaString resulting from concatenation of (this .. rhs)

concatTo

public LuaValue concatTo(LuaNumber lhs)

从类复制的说明: LuaValue

Reverse-concatenation: concatenate this value onto another value known to be a LuaNumber and return the result using rules of lua string concatenation including metatag processing.

Only strings and numbers as represented can be concatenated, meaning each operand must derive from LuaString or LuaNumber.

覆盖:

concatTo 在类中 LuaValue

参数:

lhs - The left-hand-side value onto which this will be concatenated

返回:

LuaValue resulting from concatenation of (lhs .. this)

另请参阅:

LuaValue.concat(LuaValue)

concatTo

public LuaValue concatTo(LuaString lhs)

从类复制的说明: LuaValue

Reverse-concatenation: concatenate this value onto another value known to be a LuaString and return the result using rules of lua string concatenation including metatag processing.

Only strings and numbers as represented can be concatenated, meaning each operand must derive from LuaString or LuaNumber.

覆盖:

concatTo 在类中 LuaValue

参数:

lhs - The left-hand-side value onto which this will be concatenated

返回:

LuaValue resulting from concatenation of (lhs .. this)

另请参阅:

LuaValue.concat(LuaValue)