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

  • Field Details

    • REAC

      private 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

    • ActivationStatement

      private ActivationStatement()
      Default constructor used by Attribute File I/O

  • 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()
      Java coding utility: Edit direct (re)activation
      Returns:
      the resulting Java source code

    • edActivateAt

      private String edActivateAt()
      Java coding utility: Edit (Re)Activate Process AT ...
      Returns:
      the resulting Java source code

    • edActivateDelay

      private String edActivateDelay()
      Java coding utility: Edit (Re)Activate Process DELAY ...
      Returns:
      the resulting Java source code

    • edActivateBefore

      private String edActivateBefore()
      Java coding utility: Edit (Re)Activate Process BEFORE ...
      Returns:
      the resulting Java source code

    • edActivateAfter

      private String edActivateAfter()
      Java coding utility: Edit (Re)Activate Process AFTER ...
      Returns:
      the resulting Java source code

    • buildByteCode

      public void buildByteCode(CodeBuilder codeBuilder)
      Description copied from class: Statement
      Build Java ByteCode.
      Overrides:
      buildByteCode in class Statement
      Parameters:
      codeBuilder - the codeBuilder to use.

    • buildActivateDirect

      private void buildActivateDirect(CodeBuilder codeBuilder)
      ClassFile coding utility: Build direct (re)activation
      Parameters:
      codeBuilder - the codeBuilder to use.

    • buildActivateAt

      private void buildActivateAt(CodeBuilder codeBuilder)
      ClassFile coding utility: Build (Re)Activate Process AT ...
      Parameters:
      codeBuilder - the codeBuilder to use.

    • buildActivateDelay

      private void buildActivateDelay(CodeBuilder codeBuilder)
      ClassFile coding utility: Build (Re)Activate Process DELAY ...
      Parameters:
      codeBuilder - the codeBuilder to use.

    • buildActivateBefore

      private void buildActivateBefore(CodeBuilder codeBuilder)
      ClassFile coding utility: Build (Re)Activate Process BEFORE ...
      Parameters:
      codeBuilder - the codeBuilder to use.

    • buildActivateAfter

      private void buildActivateAfter(CodeBuilder codeBuilder)
      ClassFile coding utility: Build (Re)Activate Process AFTER ...
      Parameters:
      codeBuilder - the codeBuilder to use.

    • printTree

      public void printTree(int indent, Object head)
      Description copied from class: SyntaxClass
      Utility print syntax tree method.
      Overrides:
      printTree in class SyntaxClass
      Parameters:
      indent - number of spaces leading the lines
      head - the head of the tree.

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • writeObject

      public void writeObject(AttributeOutputStream oupt) throws IOException
      Description copied from class: SyntaxClass
      Write a SyntaxClass object to a AttributeOutputStream.
      Overrides:
      writeObject in class SyntaxClass
      Parameters:
      oupt - the AttributeOutputStream to write to.
      Throws:
      IOException - if something went wrong.

    • readObject

      public static ActivationStatement readObject(AttributeInputStream inpt) throws IOException
      Read and return an ActivationStatement object.
      Parameters:
      inpt - the AttributeInputStream to read from
      Returns:
      the ActivationStatement object read from the stream.
      Throws:
      IOException - if something went wrong.