avrora.core.isdl.ast
Class IfStmt

java.lang.Object
  avrora.core.isdl.ast.Stmt
      avrora.core.isdl.ast.IfStmt

public class IfStmt

extends Stmt

The IfStmt class represents a simple branch within the IR. Since loops and switch statements are not allowed, if statements (and subroutine calls) are the only form of control flow.

Field Summary

Expr	cond The cond field stores a reference to the expression that is evaluated as the condition determining which branch is executed.
java.util.List	falseBranch The falseBranch field stores a reference to the list of statements to be executed if the condition is false.
java.util.List	trueBranch The trueBranch field stores a reference to the list of statements to be executed if the condition is true.

Constructor Summary

IfStmt(Expr c, java.util.List t, java.util.List f)
The constructor of the IfStmt class simply initializes the internal fields based on the parameters.

Method Summary

Stmt	accept(StmtRebuilder r, java.lang.Object env) The accept() method implements one half of the visitor pattern for visiting the abstract syntax trees representing the code of a particular instruction or subroutine.
void	accept(StmtVisitor v) The accept() method implements one half of the visitor pattern for visiting the abstract syntax trees representing the code of a particular instruction or subroutine.
java.lang.String	toString() The toString() method recursively converts this statement to a string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

cond

public final Expr cond

The cond field stores a reference to the expression that is evaluated as the condition determining which branch is executed.

trueBranch

public final java.util.List trueBranch

The trueBranch field stores a reference to the list of statements to be executed if the condition is true.

falseBranch

public final java.util.List falseBranch

The falseBranch field stores a reference to the list of statements to be executed if the condition is false.

Constructor Detail

IfStmt

public IfStmt(Expr c,
              java.util.List t,
              java.util.List f)

The constructor of the IfStmt class simply initializes the internal fields based on the parameters.

Parameters:

c - a reference to the expression representing the condition

t - a reference to the list of statements to execute if the condition evaluates to true

f - a reference to the list of statements to execute if the condition evaluates to false

Method Detail

accept

public void accept(StmtVisitor v)

The accept() method implements one half of the visitor pattern for visiting the abstract syntax trees representing the code of a particular instruction or subroutine.

Specified by:

accept in class Stmt

Parameters:

v - the visitor to accept

toString

public java.lang.String toString()

The toString() method recursively converts this statement to a string.

Returns:

a string representation of this statement

accept

public Stmt accept(StmtRebuilder r,
                   java.lang.Object env)

The accept() method implements one half of the visitor pattern for visiting the abstract syntax trees representing the code of a particular instruction or subroutine. The StmtRebuilder interface allows visitors to rearrange and rebuild the statements.

Specified by:

accept in class Stmt

Parameters:

r - the visitor to accept

Returns:

the result of calling the appropriate visit() of the rebuilder passed