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