polyglot.ext.jl.ast
Class Switch_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.Switch_c

All Implemented Interfaces:

java.lang.Cloneable, CompoundStmt, JL, Node, NodeOps, Stmt, Switch, Term, Copy

public class Switch_c
extends Stmt_c
implements Switch

A Switch is an immutable representation of a Java switch statement. Such a statement has an expression which is evaluated to determine where to branch to, an a list of labels and block statements which are conditionally evaluated. One of the labels, rather than having a constant expression, may be lablled default.

Field Summary

protected java.util.List	elements
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

Switch_c(Position pos, Expr expr, java.util.List elements)

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.
java.util.List	elements() Get the switch elements of the statement.
Switch	elements(java.util.List elements) Set the switch elements of the statement.
Context	enterScope(Context c) Push a new scope upon entering this node, and add any declarations to the context that should be in scope when visiting children of this node.
Term	entry() Return the first (sub)term performed when evaluating this term.
Expr	expr() Get the expression to switch on.
Switch	expr(Expr expr) Set the expression to switch on.
void	prettyPrint(CodeWriter w, PrettyPrinter tr) Write the statement to an output file.
protected Switch_c	reconstruct(Expr expr, java.util.List elements) Reconstruct the statement.
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, exceptionCheckEnter, exceptionCheckOverride, ext, ext, ext, ext, init, node, position, position, print, printBlock, printSubStmt, throwTypes, 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, exceptionCheck, exceptionCheckEnter, throwTypes, translate, typeCheckEnter

Methods inherited from interface polyglot.util.Copy

copy

Field Detail

expr

protected Expr expr

elements

protected java.util.List elements

Constructor Detail

Switch_c

public Switch_c(Position pos,
                Expr expr,
                java.util.List elements)

Method Detail

expr

public Expr expr()

Get the expression to switch on.

Specified by:

expr in interface Switch

expr

public Switch expr(Expr expr)

Set the expression to switch on.

Specified by:

expr in interface Switch

elements

public java.util.List elements()

Get the switch elements of the statement.

Specified by:

elements in interface Switch

Returns:

A list of SwitchElement.

elements

public Switch elements(java.util.List elements)

Set the switch elements of the statement.

Specified by:

elements in interface Switch

Parameters:

elements - A list of SwitchElement.

reconstruct

protected Switch_c reconstruct(Expr expr,
                               java.util.List elements)

Reconstruct the statement.

enterScope

public Context enterScope(Context c)

Description copied from class: Node_c

Push a new scope upon entering this node, and add any declarations to the context that should be in scope when visiting children of this node.

Specified by:

enterScope in interface NodeOps

Overrides:

enterScope in class Node_c

Parameters:

c - the current Context

Returns:

the Context to be used for visiting this node.

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