polyglot.ext.jl.ast
Class Throw_c

java.lang.Object
  polyglot.ext.jl.ast.Node_c
      polyglot.ext.jl.ast.Term_c
          polyglot.ext.jl.ast.Stmt_c
              polyglot.ext.jl.ast.Throw_c

All Implemented Interfaces:

java.lang.Cloneable, JL, Node, NodeOps, Stmt, Term, Throw, Copy

public class Throw_c
extends Stmt_c
implements Throw

A Throw is an immutable representation of a throw statement. Such a statement contains a single Expr which evaluates to the object being thrown.

Field Summary

protected Expr

expr

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

Throw_c(Position pos, Expr expr)

Method Summary

java.util.List	acceptCFG(CFGBuilder v, java.util.List succs) Visit this term in evaluation order.
Type	childExpectedType(Expr child, AscriptionVisitor av) Get the expected type of a child expression of this.
Term	entry() Return the first (sub)term performed when evaluating this term.
Expr	expr() Get the expression to throw.
Throw	expr(Expr expr) Set the expression to throw.
void	prettyPrint(CodeWriter w, PrettyPrinter tr) Write the statement to an output file.
protected Throw_c	reconstruct(Expr expr) Reconstruct the statement.
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 statement.
Node	visitChildren(NodeVisitor v) Visit the children of the statement.

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, buildTypes, buildTypesEnter, buildTypesOverride, copy, del, del, disambiguate, disambiguateEnter, disambiguateOverride, dump, 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.Term

exceptions, exceptions, reachable, reachable

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

Field Detail

expr

protected Expr expr

Constructor Detail

Throw_c

public Throw_c(Position pos,
               Expr expr)

Method Detail

expr

public Expr expr()

Get the expression to throw.

Specified by:

expr in interface Throw

expr

public Throw expr(Expr expr)

Set the expression to throw.

Specified by:

expr in interface Throw

reconstruct

protected Throw_c reconstruct(Expr expr)

Reconstruct the statement.

visitChildren

public Node visitChildren(NodeVisitor v)

Visit the children of the statement.

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 statement.

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 statement 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