polyglot.ext.jl.ast
Class Cast_c

java.lang.Object
  polyglot.ext.jl.ast.Node_c
      polyglot.ext.jl.ast.Term_c
          polyglot.ext.jl.ast.Expr_c
              polyglot.ext.jl.ast.Cast_c

All Implemented Interfaces:

java.lang.Cloneable, Cast, Expr, JL, Node, NodeOps, Prefix, Receiver, Term, Typed, Copy

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

exceptions, 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 term in evaluation order.
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

exceptionCheck, exceptions, exceptions, 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, 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

exceptions, exceptions, 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

Parameters:

v - The visitor that will traverse/rewrite the AST.

Returns:

A new AST if a change was made, or this.

typeCheck

public Node typeCheck(TypeChecker tc)
               throws SemanticException

Type check the expression.

Specified by:

typeCheck in interface NodeOps

Overrides:

typeCheck in class Node_c

Parameters:

tc - The type checking visitor.

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

Parameters:

child - A child expression of this node.

av - An ascription visitor.

Returns:

The expected type of child.

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

Parameters:

w - The code writer to which to write.

tr - The pretty printer. This is not a visitor.

entry

public Term entry()

Description copied from class: Term_c

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 class: Term_c

Visit this term in evaluation order.

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