Class StandaloneExpression

java.lang.Object
simula.compiler.syntaxClass.SyntaxClass
simula.compiler.syntaxClass.statement.Statement
simula.compiler.syntaxClass.statement.StandaloneExpression
public final class StandaloneExpression extends Statement

Standalone Expression Statement.


Syntax:

  standalone-expression = expression | assignment-statement

     assignment-statement
          = expression { assignment-operator expression }

Link to GitHub: Source File.

Author:
Øystein Myhre Andersen

  • Field Details

    • expression

      private Expression expression
      The expression.

  • Constructor Details

    • StandaloneExpression

      StandaloneExpression(int line, Expression expression)
      Create a new StandaloneExpression.
      Parameters:
      line - the source line number
      expression - the expression

    • StandaloneExpression

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

  • Method Details

    • expectStandaloneExpression

      private static Expression expectStandaloneExpression()

      Parse a standalone expression.

      Syntax:

   standalone-expression  =  expression  { assignment-operator  expression }

      Pre-Condition: First expression is already read.

      Returns:
      the resulting StandaloneExpression

    • doChecking

      public void doChecking()
      Description copied from class: SyntaxClass

      Perform semantic checking.

      This must be redefined in every subclass.

      Overrides:
      doChecking in class SyntaxClass

    • doJavaCoding

      public void doJavaCoding()
      Description copied from class: SyntaxClass
      Output Java code.
      Overrides:
      doJavaCoding in class Statement

    • toJavaCode

      public String toJavaCode()
      Description copied from class: SyntaxClass
      Generate Java code for this Syntax Class.
      Overrides:
      toJavaCode in class SyntaxClass
      Returns:
      Java 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.

    • print

      public void print(int indent)
      Description copied from class: SyntaxClass
      Utility print method.
      Overrides:
      print in class SyntaxClass
      Parameters:
      indent - number of spaces leading the line

    • 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 StandaloneExpression readObject(AttributeInputStream inpt) throws IOException
      Read and return a StandaloneExpression object.
      Parameters:
      inpt - the AttributeInputStream to read from
      Returns:
      the StandaloneExpression object read from the stream.
      Throws:
      IOException - if something went wrong.