Package org.codehaus.groovy.classgen.asm

Class ExpressionAsVariableSlot

java.lang.Object

org.codehaus.groovy.ast.ASTNode

org.codehaus.groovy.ast.AnnotatedNode

org.codehaus.groovy.ast.expr.Expression

org.codehaus.groovy.classgen.BytecodeExpression

org.codehaus.groovy.classgen.asm.ExpressionAsVariableSlot

All Implemented Interfaces:

GroovydocHolder<AnnotatedNode>, NodeMetaDataHandler

public class ExpressionAsVariableSlot
extends BytecodeExpression

Helper class that takes an Expression and if visited will load it normally, storing the result in a helper variable, which then can be requested after the visit is completed. A copy of the variable will stay on the stack. Subsequent visits will load the stored value instead of visiting the expression again

Field Summary

Fields inherited from class org.codehaus.groovy.classgen.BytecodeExpression

NOP

Fields inherited from class org.codehaus.groovy.ast.expr.Expression

EMPTY_ARRAY

Fields inherited from interface groovy.lang.groovydoc.GroovydocHolder

DOC_COMMENT

Constructor Summary

Constructors

Constructor	Description
ExpressionAsVariableSlot(WriterController controller, Expression expression)	Creates an expression that stores an expression result in a temporary variable.
ExpressionAsVariableSlot(WriterController controller, Expression expression, String name)	Creates an expression that stores an expression result in a temporary variable.

Method Summary

Modifier and Type	Method	Description
int	getIndex()	returns the index of the bytecode variable
String	getText()	Returns a human-readable text representation of this AST node.
void	visit(org.objectweb.asm.MethodVisitor mv)	Emits bytecode instructions using the provided method visitor.

Methods inherited from class org.codehaus.groovy.classgen.BytecodeExpression

transformExpression, visit

Methods inherited from class org.codehaus.groovy.ast.expr.Expression

getType, setType, transformExpressions, transformExpressions

Methods inherited from class org.codehaus.groovy.ast.AnnotatedNode

addAnnotation, addAnnotation, addAnnotations, getAnnotations, getAnnotations, getDeclaringClass, getGroovydoc, getInstance, hasNoRealSourcePosition, isSynthetic, setDeclaringClass, setHasNoRealSourcePosition, setSynthetic

Methods inherited from class org.codehaus.groovy.ast.ASTNode

copyNodeMetaData, getColumnNumber, getLastColumnNumber, getLastLineNumber, getLineNumber, getMetaDataMap, setColumnNumber, setLastColumnNumber, setLastLineNumber, setLineNumber, setMetaDataMap, setSourcePosition

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.codehaus.groovy.ast.NodeMetaDataHandler

copyNodeMetaData, getNodeMetaData, getNodeMetaData, getNodeMetaData, newMetaDataMap, putNodeMetaData, removeNodeMetaData, setNodeMetaData

Constructor Details

ExpressionAsVariableSlot

public ExpressionAsVariableSlot(WriterController controller,
 Expression expression,
 String name)

Creates an expression that stores an expression result in a temporary variable.

Parameters:

controller - the writer controller

expression - the expression to evaluate and store

name - the name for the temporary variable

ExpressionAsVariableSlot

public ExpressionAsVariableSlot(WriterController controller,
 Expression expression)

Creates an expression that stores an expression result in a temporary variable.

Parameters:

controller - the writer controller

expression - the expression to evaluate and store

Method Details

visit

public void visit(org.objectweb.asm.MethodVisitor mv)

Emits bytecode instructions using the provided method visitor.

Specified by:

visit in class BytecodeExpression

Parameters:

mv - the ASM method visitor to generate bytecode

getIndex

public int getIndex()

returns the index of the bytecode variable

getText

public String getText()

Returns a human-readable text representation of this AST node. Used for debugging and error messages. Default implementation returns a message indicating the representation is not yet implemented for this node type.

Overrides:

getText in class BytecodeExpression

Returns:

text representation of this node, or placeholder for unimplemented types