com.svincent.smalljava
Class Expr.If

java.lang.Object
  |
  +--com.svincent.util.BaseObject
        |
        +--com.svincent.smalljava.Expr
              |
              +--com.svincent.smalljava.Expr.If

Enclosing class:

Expr

public static class Expr.If

extends Expr

If condition evaluates to true, evaluate the then clase. otherwise, evaluate the else clasue.

Inner classes inherited from class com.svincent.smalljava.Expr

Expr.Begin, Expr.BooleanConst, Expr.Call, Expr.Comment, Expr.DoubleConst, Expr.EQ, Expr.GE, Expr.GetField, Expr.GetLocal, Expr.GetStatic, Expr.GT, Expr.If, Expr.IntConst, Expr.LE, Expr.LT, Expr.Minus, Expr.NE, Expr.New, Expr.NewArray, Expr.NullConst, Expr.Plus, Expr.Return, Expr.SetArray, Expr.SetField, Expr.SetLocal, Expr.StringConst, Expr.SuperConstructor, Expr.This, Expr.While

Fields inherited from class com.svincent.smalljava.Expr

debugTypecheck, EmptyArray

Constructor Summary

Expr.If(Expr _cond)

Expr.If(Expr _cond, Expr _thenClause)

Expr.If(Expr _cond, Expr _thenClause, Expr _elseClause)

Method Summary

protected SmallType	deriveType(SmallMethod m) Actually do the work.
protected void	generateInstructions(ClassFileWriter out, VariableTable vars) Generate a list of JVM instructions for this expression node.
protected boolean	printTrailingSemi() Returns true if, after printing this expression as a statement, there should be a trailing semicolon printed.
void	setElse(Expr _elseClause)
void	setThen(Expr _thenClause)
void	writeAsJava(IndentPrintWriter out) Write this expression out as Java source code.

Methods inherited from class com.svincent.smalljava.Expr

evalType, getResultType, tag

Methods inherited from class com.svincent.util.BaseObject

dump, dump, dumpToString

Methods inherited from class java.lang.Object

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

Constructor Detail

Expr.If

public Expr.If(Expr _cond)

Expr.If

public Expr.If(Expr _cond,
               Expr _thenClause)

Expr.If

public Expr.If(Expr _cond,
               Expr _thenClause,
               Expr _elseClause)

Method Detail

printTrailingSemi

protected boolean printTrailingSemi()

Description copied from class: Expr

Returns true if, after printing this expression as a statement, there should be a trailing semicolon printed. Notable exceptions are {...} constructs, and ifs and whiles.

Overrides:

printTrailingSemi in class Expr

setThen

public void setThen(Expr _thenClause)

setElse

public void setElse(Expr _elseClause)

deriveType

protected SmallType deriveType(SmallMethod m)
                        throws SmallJavaValidationException

Description copied from class: Expr

Actually do the work. deriveType should call 'evalType' for recursion, and super.deriveType to repeat parent work. These simple rules for you and me will result in a happy world where the type returned is always cached appropriately.

Overrides:

deriveType in class Expr

Tags copied from class: Expr

See Also:

Expr.evalType(SmallMethod), Expr.getResultType()

writeAsJava

public void writeAsJava(IndentPrintWriter out)

Description copied from class: Expr

Write this expression out as Java source code.

Overrides:

writeAsJava in class Expr

generateInstructions

protected void generateInstructions(ClassFileWriter out,
                                    VariableTable vars)

Description copied from class: Expr

Generate a list of JVM instructions for this expression node.

Overrides:

generateInstructions in class Expr