Package org.codehaus.groovy.transform.sc

Class TemporaryVariableExpression

java.lang.Object

org.codehaus.groovy.ast.ASTNode

org.codehaus.groovy.ast.AnnotatedNode

org.codehaus.groovy.ast.expr.Expression

org.codehaus.groovy.transform.sc.TemporaryVariableExpression

All Implemented Interfaces:

GroovydocHolder<AnnotatedNode>, NodeMetaDataHandler

public class TemporaryVariableExpression
extends Expression

A front-end class for ExpressionAsVariableSlot which allows defining temporary variables loaded from variable slots directly at the AST level, without any knowledge of AsmClassGenerator.

Since:

2.4.0

Field Summary

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
TemporaryVariableExpression(Expression expression)	Wraps an expression so it can be cached in a temporary variable slot during bytecode generation.

Method Summary

Modifier and Type	Method	Description
ClassNode	getType()	Returns the wrapped expression type.
void	remove(WriterController controller)	Releases the temporary variable slot associated with this expression.
Expression	transformExpression(ExpressionTransformer transformer)	Transforms the wrapped expression while preserving the shared variable slot.
void	visit(GroovyCodeVisitor visitor)	Emits the cached variable-slot access when visiting bytecode, or delegates to the wrapped expression otherwise.

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

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, getText, 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

TemporaryVariableExpression

public TemporaryVariableExpression(Expression expression)

Wraps an expression so it can be cached in a temporary variable slot during bytecode generation.

Parameters:

expression - the expression to cache

Method Details

getType

public ClassNode getType()

Returns the wrapped expression type.

Overrides:

getType in class Expression

Returns:

the inferred type of the wrapped expression

remove

public void remove(WriterController controller)

Releases the temporary variable slot associated with this expression.

Parameters:

controller - the active writer controller

transformExpression

public Expression transformExpression(ExpressionTransformer transformer)

Transforms the wrapped expression while preserving the shared variable slot.

Specified by:

transformExpression in class Expression

Parameters:

transformer - the expression transformer to apply

Returns:

a transformed temporary-variable expression

visit

public void visit(GroovyCodeVisitor visitor)

Emits the cached variable-slot access when visiting bytecode, or delegates to the wrapped expression otherwise.

Overrides:

visit in class ASTNode

Parameters:

visitor - the visitor to accept