Class DupThis

java.lang.Object

de.inetsoftware.jwebassembly.module.WasmInstruction

de.inetsoftware.jwebassembly.module.DupThis

class DupThis
extends WasmInstruction

This class save a reference of THIS to a temporary variable for a later virtual caLL. The reference of THIS is used for accessing the vtable of the object.

Nested Class Summary

Nested classes/interfaces inherited from class WasmInstruction

WasmInstruction.Type

Field Summary

Fields

Modifier and Type	Field	Description
private LocaleVariableManager	localVariables
private int	tempVarSlot
private WasmCallIndirectInstruction	virtualCall

Constructor Summary

Constructors

Constructor	Description
DupThis(WasmCallIndirectInstruction virtualCall, int tempVarSlot, LocaleVariableManager localVariables, int javaCodePos)	Create a instance.

Method Summary

Modifier and Type	Method	Description
(package private) int	getPopCount()	Get the count of values that are removed from the stack.
(package private) AnyType[]	getPopValueTypes()
(package private) AnyType	getPushValueType()	Get the ValueType if this instruction push a value on the stack.
(package private) WasmInstruction.Type	getType()	Get the type of instruction
(package private) void	writeTo(ModuleWriter writer)	Write this instruction to the WASM module.

Methods inherited from class WasmInstruction

getCodePosition, getLineNumber, setCodePosition

Methods inherited from class Object

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

Field Details

virtualCall

private WasmCallIndirectInstruction virtualCall

tempVarSlot

private int tempVarSlot

localVariables

private LocaleVariableManager localVariables

Constructor Details

DupThis

DupThis(WasmCallIndirectInstruction virtualCall,
 int tempVarSlot,
 LocaleVariableManager localVariables,
 int javaCodePos)

Create a instance.

Parameters:

virtualCall - the related virtual function call.

tempVarSlot - the slot of the temporary variable

localVariables - the manager for local variables

javaCodePos - the code position

Method Details

getType

WasmInstruction.Type getType()

Get the type of instruction

Specified by:

getType in class WasmInstruction

Returns:

the type

writeTo

void writeTo(ModuleWriter writer)
      throws IOException

Write this instruction to the WASM module.

Specified by:

writeTo in class WasmInstruction

Parameters:

writer - the target writer

Throws:

IOException - if any I/O error occur

getPushValueType

AnyType getPushValueType()

Get the ValueType if this instruction push a value on the stack.

Specified by:

getPushValueType in class WasmInstruction

Returns:

the ValueType or null if no value is push

getPopCount

int getPopCount()

Get the count of values that are removed from the stack.

Specified by:

getPopCount in class WasmInstruction

Returns:

the count

getPopValueTypes

AnyType[] getPopValueTypes()

Specified by:

getPopValueTypes in class WasmInstruction