Module Simula

Package simula.compiler.syntaxClass.statement

Class ActivationStatement

java.lang.Object

simula.compiler.syntaxClass.SyntaxClass

simula.compiler.syntaxClass.statement.Statement

simula.compiler.syntaxClass.statement.ActivationStatement

public final class ActivationStatement
extends Statement

Activation Statement.

 
 Simula Standard: 12.2 Activation statement
 
   activation-statement = activator  object-expression [ scheduling-part ]
 
      activator = ACTIVATE | REACTIVATE

      scheduling-part = AT arithmetic-expression [ PRIOR ]
                      | DELAY arithmetic-expression [ PRIOR ]
                      | BEFORE object-expression
                      | AFTER object-expression
                      
                      
                      
 The activation statement is defined by the procedure ACTIVAT in Simula Standard.
 In this implementation we use a set of methods for the same purpose:
 
   activate x;                      ==> ActivateDirect(false,x);
   activate x delay 1.34;           ==> ActivateDelay(false,x,1.34f,false);
   activate x delay 1.34 prior;     ==> ActivateDelay(false,x,1.34f,true);
   activate x at 13.7;              ==> ActivateAt(false,x,13.7f,false);
   activate x at 13.7 prior;        ==> ActivateAt(false,x,13.7f,true);
   activate x before y;             ==> ActivateBefore(false,x,y);
   activate x after y;              ==> ActivateAfter(false,x,y);
   
   reactivate x;                    ==> ActivateDirect(true,x);
   reactivate x delay 1.34;         ==> ActivateDelay(true,x,1.34f,false);
   reactivate x delay 1.34 prior;   ==> ActivateDelay(true,x,1.34f,true);
   reactivate x at 13.7;            ==> ActivateAt(true,x,13.7f,false);
   reactivate x at 13.7 prior;      ==> ActivateAt(true,x,13.7f,true);
   reactivate x before y;           ==> ActivateBefore(true,x,y);
   reactivate x after y;            ==> ActivateAfter(true,x,y);
   
 See runtime module RTS_Simulation for details.  
 

Link to GitHub: Source File.

Author:

SIMULA Standards Group, Øystein Myhre Andersen

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static enum	ActivationStatement.ActivationCode	The activation code

Field Summary

Fields

Modifier and Type	Field	Description
private ActivationStatement.ActivationCode	code	The activation code
private Expression	object1	First object-expression in activation statement.
private Expression	object2	Second object-expression in activation statement.
private Boolean	prior	Indicates that PRIOR is present in the activation statement.
private final boolean	REAC	Indicates reactivation when true, otherwise activation.
private Expression	time	The AT time expression.

Fields inherited from class simula.compiler.syntaxClass.SyntaxClass

lineNumber

Constructor Summary

Constructors

Constructor	Description
ActivationStatement(int line)	Create a new ActivationStatement.

Method Summary

Modifier and Type	Method	Description
void	doChecking()	Perform semantic checking.
private String	edActivateAfter()	Edit (Re)Activate Process AFTER ...
private String	edActivateAt()	Edit (Re)Activate Process AT ...
private String	edActivateBefore()	Edit (Re)Activate Process BEFORE ...
private String	edActivateDelay()	Edit (Re)Activate Process DELAY ...
private String	edActivateDirect()	Edit direct (re)activation
void	printTree(int indent)	Utility print syntax tree method.
String	toJavaCode()	Generate Java code for this Syntax Class.
String	toString()

Methods inherited from class simula.compiler.syntaxClass.statement.Statement

doJavaCoding, expectStatement

Methods inherited from class simula.compiler.syntaxClass.SyntaxClass

ASSERT_SEMANTICS_CHECKED, doDeclarationCoding, edIndent, edTreeIndent, IS_SEMANTICS_CHECKED, print, SET_SEMANTICS_CHECKED

Methods inherited from class java.lang.Object

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

Field Details

REAC

private final boolean REAC

Indicates reactivation when true, otherwise activation.

object1

private Expression object1

First object-expression in activation statement.

object2

private Expression object2

Second object-expression in activation statement.

time

private Expression time

The AT time expression.

prior

private Boolean prior

Indicates that PRIOR is present in the activation statement.

code

private ActivationStatement.ActivationCode code

The activation code

Constructor Details

ActivationStatement

ActivationStatement(int line)

Create a new ActivationStatement.

Parameters:

line - the source line number

Method Details

doChecking

public void doChecking()

Description copied from class: SyntaxClass

Perform semantic checking.

This must be redefined in every subclass.

Overrides:

doChecking in class SyntaxClass

toJavaCode

public String toJavaCode()

Description copied from class: SyntaxClass

Generate Java code for this Syntax Class.

Overrides:

toJavaCode in class SyntaxClass

Returns:

Java code

edActivateDirect

private String edActivateDirect()

Edit direct (re)activation

Returns:

the resulting Java source code

edActivateAt

private String edActivateAt()

Edit (Re)Activate Process AT ...

Returns:

the resulting Java source code

edActivateDelay

private String edActivateDelay()

Edit (Re)Activate Process DELAY ...

Returns:

the resulting Java source code

edActivateBefore

private String edActivateBefore()

Edit (Re)Activate Process BEFORE ...

Returns:

the resulting Java source code

edActivateAfter

private String edActivateAfter()

Edit (Re)Activate Process AFTER ...

Returns:

the resulting Java source code

printTree

public void printTree(int indent)

Description copied from class: SyntaxClass

Utility print syntax tree method.

Overrides:

printTree in class SyntaxClass

Parameters:

indent - number of spaces leading the lines

toString

public String toString()

Overrides:

toString in class Object