com.alibaba.qlexpress4.runtime.instruction

Class JumpIfPopInstruction

java.lang.Object

com.alibaba.qlexpress4.runtime.instruction.QLInstruction

com.alibaba.qlexpress4.runtime.instruction.JumpIfPopInstruction

public class JumpIfPopInstruction
extends QLInstruction

Operation: pop the top of stack, if the element is ${expect}, jump to position, else execute next instruction as normal. jump if null Input: 1 Output: 0 Author: DQinYuan

Field Summary

Fields inherited from class com.alibaba.qlexpress4.runtime.instruction.QLInstruction

errorReporter

Constructor Summary

Constructors

Constructor and Description
JumpIfPopInstruction(ErrorReporter errorReporter, boolean expect, int position)

Method Summary

Modifier and Type	Method and Description
QResult	execute(QContext qContext, QLOptions qlOptions)
void	println(int index, int depth, java.util.function.Consumer<java.lang.String> debug)
void	setPosition(int position)
int	stackInput()
int	stackOutput()

Methods inherited from class com.alibaba.qlexpress4.runtime.instruction.QLInstruction

getErrorReporter

Methods inherited from class java.lang.Object

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

Constructor Detail

JumpIfPopInstruction

public JumpIfPopInstruction(ErrorReporter errorReporter,
                            boolean expect,
                            int position)

Method Detail

execute

public QResult execute(QContext qContext,
                       QLOptions qlOptions)

Specified by:

execute in class QLInstruction

stackInput

public int stackInput()

Specified by:

stackInput in class QLInstruction

Returns:

input size

stackOutput

public int stackOutput()

Specified by:

stackOutput in class QLInstruction

Returns:

output size

setPosition

public void setPosition(int position)

println

public void println(int index,
                    int depth,
                    java.util.function.Consumer<java.lang.String> debug)

Specified by:

println in class QLInstruction