polyglot.ext.jl.ast
Class Cast_c

java.lang.Object
  extended bypolyglot.ext.jl.ast.Node_c
      extended bypolyglot.ext.jl.ast.Term_c
          extended bypolyglot.ext.jl.ast.Expr_c
              extended bypolyglot.ext.jl.ast.Cast_c
All Implemented Interfaces:
Cast, java.lang.Cloneable, Copy, Expr, JL, Node, NodeOps, Prefix, Receiver, Term, Typed
Direct Known Subclasses:
OPCast, PolyJCast_c

public class Cast_c
extends Expr_c
implements Cast

A Cast is an immutable representation of a casting operation. It consists of an Expr being cast and a TypeNode being cast to.


Field Summary
protected  TypeNode castType
           
protected  Expr expr
           
 
Fields inherited from class polyglot.ext.jl.ast.Expr_c
type
 
Fields inherited from class polyglot.ext.jl.ast.Term_c
reachable
 
Fields inherited from class polyglot.ext.jl.ast.Node_c
del, ext, position
 
Constructor Summary
Cast_c(Position pos, TypeNode castType, Expr expr)
           
 
Method Summary
 java.util.List acceptCFG(CFGBuilder v, java.util.List succs)
          Visit this node, calling calling v.edge() for each successor in succs, if data flows on that edge.
 TypeNode castType()
          Get the cast type of the expression.
 Cast castType(TypeNode castType)
          Set the cast type of the expression.
 Type childExpectedType(Expr child, AscriptionVisitor av)
          Get the expected type of a child expression of this.
 java.lang.Object constantValue()
          Returns the constant value of the expression, if any.
 Term entry()
          Return the first (sub)term performed when evaluating this term.
 Expr expr()
          Get the expression being cast.
 Cast expr(Expr expr)
          Set the expression being cast.
 boolean isConstant()
          Return whether the expression evaluates to a constant.
 Precedence precedence()
          Get the precedence of the expression.
 void prettyPrint(CodeWriter w, PrettyPrinter tr)
          Write the expression to an output file.
protected  Cast_c reconstruct(TypeNode castType, Expr expr)
          Reconstruct the expression.
 java.util.List throwTypes(TypeSystem ts)
          List of Types of exceptions that might get thrown.
 java.lang.String toString()
           
 Node typeCheck(TypeChecker tc)
          Type check the expression.
 Node visitChildren(NodeVisitor v)
          Visit the children of the expression.
 
Methods inherited from class polyglot.ext.jl.ast.Expr_c
booleanValue, buildTypes, byteValue, charValue, doubleValue, dump, floatValue, intValue, longValue, printSubExpr, printSubExpr, shortValue, stringValue, type, type
 
Methods inherited from class polyglot.ext.jl.ast.Term_c
listEntry, reachable, reachable
 
Methods inherited from class polyglot.ext.jl.ast.Node_c
addDecls, addMembers, addMembersEnter, addMembersOverride, buildTypesEnter, buildTypesOverride, copy, del, del, disambiguate, disambiguateEnter, disambiguateOverride, enterScope, enterScope, exceptionCheck, exceptionCheckEnter, exceptionCheckOverride, ext, ext, ext, ext, init, node, position, position, print, printBlock, printSubStmt, translate, typeCheckEnter, typeCheckOverride, visit, visitChild, visitEdge, visitList
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface polyglot.ast.Expr
printSubExpr, printSubExpr, type
 
Methods inherited from interface polyglot.ast.Node
del, del, dump, ext, ext, ext, ext, position, position, visit, visitChild, visitEdge, visitList
 
Methods inherited from interface polyglot.ast.JL
init, node
 
Methods inherited from interface polyglot.ast.NodeOps
addDecls, addMembers, addMembersEnter, buildTypes, buildTypesEnter, disambiguate, disambiguateEnter, enterScope, enterScope, exceptionCheck, exceptionCheckEnter, translate, typeCheckEnter
 
Methods inherited from interface polyglot.util.Copy
copy
 
Methods inherited from interface polyglot.ast.Typed
type
 
Methods inherited from interface polyglot.ast.Term
reachable, reachable
 

Field Detail

castType

protected TypeNode castType

expr

protected Expr expr
Constructor Detail

Cast_c

public Cast_c(Position pos,
              TypeNode castType,
              Expr expr)
Method Detail

precedence

public Precedence precedence()
Get the precedence of the expression.

Specified by:
precedence in interface Expr
Overrides:
precedence in class Expr_c

castType

public TypeNode castType()
Get the cast type of the expression.

Specified by:
castType in interface Cast

castType

public Cast castType(TypeNode castType)
Set the cast type of the expression.

Specified by:
castType in interface Cast

expr

public Expr expr()
Get the expression being cast.

Specified by:
expr in interface Cast

expr

public Cast expr(Expr expr)
Set the expression being cast.

Specified by:
expr in interface Cast

reconstruct

protected Cast_c reconstruct(TypeNode castType,
                             Expr expr)
Reconstruct the expression.


visitChildren

public Node visitChildren(NodeVisitor v)
Visit the children of the expression.

Specified by:
visitChildren in interface NodeOps
Overrides:
visitChildren in class Node_c

typeCheck

public Node typeCheck(TypeChecker tc)
               throws SemanticException
Type check the expression.

Specified by:
typeCheck in interface NodeOps
Overrides:
typeCheck in class Node_c
Throws:
SemanticException

childExpectedType

public Type childExpectedType(Expr child,
                              AscriptionVisitor av)
Description copied from interface: Node
Get the expected type of a child expression of this. The expected type is determined by the context in that the child occurs (e.g., for x = e, the expected type of e is the declared type of x. The expected type should impose the least constraints on the child's type that are allowed by the parent node.

Specified by:
childExpectedType in interface Node
Overrides:
childExpectedType in class Node_c

toString

public java.lang.String toString()
Overrides:
toString in class Node_c

prettyPrint

public void prettyPrint(CodeWriter w,
                        PrettyPrinter tr)
Write the expression to an output file.

Specified by:
prettyPrint in interface NodeOps
Overrides:
prettyPrint in class Node_c

entry

public Term entry()
Description copied from interface: Term
Return the first (sub)term performed when evaluating this term.

Specified by:
entry in interface Term
Specified by:
entry in class Term_c

acceptCFG

public java.util.List acceptCFG(CFGBuilder v,
                                java.util.List succs)
Description copied from interface: Term
Visit this node, calling calling v.edge() for each successor in succs, if data flows on that edge.

Specified by:
acceptCFG in interface Term
Specified by:
acceptCFG in class Term_c

throwTypes

public java.util.List throwTypes(TypeSystem ts)
Description copied from interface: NodeOps
List of Types of exceptions that might get thrown. The result is not necessarily correct until after type checking.

Specified by:
throwTypes in interface NodeOps
Overrides:
throwTypes in class Node_c

isConstant

public boolean isConstant()
Description copied from interface: Expr
Return whether the expression evaluates to a constant. This is not valid until after disambiguation.

Specified by:
isConstant in interface Expr
Overrides:
isConstant in class Expr_c

constantValue

public java.lang.Object constantValue()
Description copied from interface: Expr
Returns the constant value of the expression, if any.

Specified by:
constantValue in interface Expr
Overrides:
constantValue in class Expr_c