Module Simula

Package simula.compiler.syntaxClass.declaration

Class SimpleVariableDeclaration

java.lang.Object

simula.compiler.syntaxClass.SyntaxClass

simula.compiler.syntaxClass.declaration.Declaration

simula.compiler.syntaxClass.declaration.SimpleVariableDeclaration

All Implemented Interfaces:

Externalizable, Serializable

Direct Known Subclasses:

LabelDeclaration

public sealed class SimpleVariableDeclaration
extends Declaration
implements Externalizable
permits LabelDeclaration

Simple Variable Declaration.

 
 Simula Standard: 5.1 Simple variable declarations
 
  simple-variable-declaration
        =  type  type-list

    type-list
        =  type-list-element  { , type-list-element }

    type-list-element
        =  identifier
        |  constant-element 
 
    constant-element
        =  identifier  "="  value-expression
        |  identifier  "="  text-expression
   
 

Link to GitHub: Source File.

Author:

SIMULA Standards Group, Øystein Myhre Andersen

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class simula.compiler.syntaxClass.declaration.Declaration

Declaration.Kind

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	constant	Constant indicator.
Expression	constantElement	The constant initial value.

Fields inherited from class simula.compiler.syntaxClass.declaration.Declaration

declarationKind, declaredIn, externalIdent, identifier, isProtected, type

Fields inherited from class simula.compiler.syntaxClass.SyntaxClass

lineNumber

Constructor Summary

Constructors

Constructor	Description
SimpleVariableDeclaration()	Default constructor used by Externalization.
SimpleVariableDeclaration(Type type, String identifier)	Create a new SimpleVariableDeclaration.
SimpleVariableDeclaration(Type type, String identifier, boolean constant, Constant constantElement)	Create a new SimpleVariableDeclaration.

Method Summary

Modifier and Type	Method	Description
void	doChecking()	Perform semantic checking.
void	doDeclarationCoding()	Output possible declaration code.
(package private) static void	expectSimpleVariable(Type type, DeclarationList declarationList)	Parse a simple variable declaration.
boolean	isConstant()	Constant indicator.
void	printTree(int indent)	Utility print syntax tree method.
void	readExternal(ObjectInput inpt)
String	toJavaCode()	Generate Java code for this Syntax Class.
String	toString()
void	writeExternal(ObjectOutput oupt)

Methods inherited from class simula.compiler.syntaxClass.declaration.Declaration

getJavaIdentifier, isCompatibleClasses, modifyIdentifier, parseDeclaration

Methods inherited from class simula.compiler.syntaxClass.SyntaxClass

ASSERT_SEMANTICS_CHECKED, doJavaCoding, 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

constant

private boolean constant

Constant indicator. Is used to prevent assignment of a new value.

constantElement

public Expression constantElement

The constant initial value.

Constructor Details

SimpleVariableDeclaration

public SimpleVariableDeclaration(Type type,
 String identifier)

Create a new SimpleVariableDeclaration.

Parameters:

type - the variable type

identifier - the variable identifier

SimpleVariableDeclaration

SimpleVariableDeclaration(Type type,
 String identifier,
 boolean constant,
 Constant constantElement)

Create a new SimpleVariableDeclaration.

Parameters:

type - the variable type

identifier - the variable identifier

constant - the constant indicator

constantElement - a constant initial value

SimpleVariableDeclaration

public SimpleVariableDeclaration()

Default constructor used by Externalization.

Method Details

isConstant

public boolean isConstant()

Constant indicator. Is used to prevent assignment of a new value.

Returns:

the constant indicator

expectSimpleVariable

static void expectSimpleVariable(Type type,
 DeclarationList declarationList)

Parse a simple variable declaration.

 
 Syntax:
 
  simple-variable-declaration
        =  type  type-list

    type-list
        =  type-list-element  { , type-list-element }

    type-list-element
        =  identifier
        |  constant-element 
 
    constant-element
        =  identifier  "="  value-expression
        |  identifier  "="  text-expression
   
 

Precodition: Type is already read.

Parameters:

type - the variable type

declarationList - the declaration list to update

doChecking

public void doChecking()

Description copied from class: SyntaxClass

Perform semantic checking.

This must be redefined in every subclass.

Overrides:

doChecking in class SyntaxClass

doDeclarationCoding

public void doDeclarationCoding()

Description copied from class: SyntaxClass

Output possible declaration code.

Overrides:

doDeclarationCoding 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

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

writeExternal

public void writeExternal(ObjectOutput oupt)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput inpt)
                  throws IOException,
ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException