java.lang.Object
- org.springframework.expression.spel.ast.SpelNodeImpl
- - org.springframework.expression.spel.ast.Operator
  - - org.springframework.expression.spel.ast.OpPlus

所有已实现的接口:
Opcodes, SpelNode
```
public class OpPlus
extends Operator
```
The plus operator will:
- add numbers
- concatenate strings
It can be used as a unary operator for numbers. The standard promotions are performed when the operand types vary (double+int=double). For other options it defers to the registered overloader.
从以下版本开始:
3.0
作者:
Andy Clement, Juergen Hoeller, Ivo Smid, Giovanni Dall'Oglio Risso

嵌套类概要
- 从类继承的嵌套类/接口 org.springframework.expression.spel.ast.Operator
  Operator.DescriptorComparison

字段概要
- 从类继承的字段 org.springframework.expression.spel.ast.Operator
  leftActualDescriptor, rightActualDescriptor
- 从类继承的字段 org.springframework.expression.spel.ast.SpelNodeImpl
  children, exitTypeDescriptor, pos
- 从接口继承的字段 org.springframework.asm.Opcodes
  AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MANDATED, ACC_MODULE, ACC_NATIVE, ACC_OPEN, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STATIC_PHASE, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_TRANSITIVE, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASM4, ASM5, ASM6, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7, V1_8, V1_9

构造器概要
构造器
构造器说明
OpPlus(int pos, SpelNodeImpl... operands)

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`void`	`generateCode(MethodVisitor mv, CodeFlow cf)`	Generate the bytecode for this node into the supplied visitor.
`SpelNodeImpl`	`getRightOperand()`
`TypedValue`	`getValueInternal(ExpressionState state)`
`boolean`	`isCompilable()`	Check whether a node can be compiled to bytecode.
`String`	`toStringAST()`	String format for all operators is the same `'(' [operand] [operator] [operand] ')'`.

从类继承的方法 org.springframework.expression.spel.ast.Operator
equalityCheck, generateComparisonCode, getLeftOperand, getOperatorName, isCompilableOperatorUsingNumerics

从类继承的方法 org.springframework.expression.spel.ast.SpelNodeImpl
generateCodeForArgument, generateCodeForArguments, getChild, getChildCount, getEndPosition, getExitDescriptor, getObjectClass, getPreviousChild, getStartPosition, getTypedValue, getValue, getValue, getValueRef, isWritable, nextChildIs, setValue

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - OpPlus
```
public OpPlus(int pos,
              SpelNodeImpl... operands)
```
- 方法详细资料
  - getValueInternal
```
public TypedValue getValueInternal(ExpressionState state)
                            throws EvaluationException
```
    指定者:
    getValueInternal 在类中 SpelNodeImpl
    抛出:
    EvaluationException
  - toStringAST
```
public String toStringAST()
```
    从类复制的说明: Operator
    String format for all operators is the same '(' [operand] [operator] [operand] ')'.
    指定者:
    toStringAST 在接口中 SpelNode
    覆盖:
    toStringAST 在类中 Operator
    返回:
    the string form of this AST node
  - getRightOperand
```
public SpelNodeImpl getRightOperand()
```
    覆盖:
    getRightOperand 在类中 Operator
  - isCompilable
```
public boolean isCompilable()
```
    从类复制的说明: SpelNodeImpl
    Check whether a node can be compiled to bytecode. The reasoning in each node may be different but will typically involve checking whether the exit type descriptor of the node is known and any relevant child nodes are compilable.
    覆盖:
    isCompilable 在类中 SpelNodeImpl
    返回:
    true if this node can be compiled to bytecode
  - generateCode
```
public void generateCode(MethodVisitor mv,
                         CodeFlow cf)
```
    从类复制的说明: SpelNodeImpl
    Generate the bytecode for this node into the supplied visitor. Context info about the current expression being compiled is available in the codeflow object. For example it will include information about the type of the object currently on the stack.
    覆盖:
    generateCode 在类中 SpelNodeImpl
    参数:
    mv - the ASM MethodVisitor into which code should be generated
    cf - a context object with info about what is on the stack

类 OpPlus

嵌套类概要

从类继承的嵌套类/接口 org.springframework.expression.spel.ast.Operator

字段概要

从类继承的字段 org.springframework.expression.spel.ast.Operator

从类继承的字段 org.springframework.expression.spel.ast.SpelNodeImpl

从接口继承的字段 org.springframework.asm.Opcodes

构造器概要

方法概要

从类继承的方法 org.springframework.expression.spel.ast.Operator

从类继承的方法 org.springframework.expression.spel.ast.SpelNodeImpl

从类继承的方法 java.lang.Object

构造器详细资料

OpPlus

方法详细资料

getValueInternal

toStringAST

getRightOperand

isCompilable

generateCode