Package gw.internal.gosu.parser.statements

Class AssignmentStatement

java.lang.Object

gw.internal.gosu.parser.ParsedElement

gw.internal.gosu.parser.Statement

gw.internal.gosu.parser.statements.AssignmentStatement

All Implemented Interfaces:

IParsedElement, IStatement, IAssignmentStatement

public final class AssignmentStatement
extends Statement
implements IAssignmentStatement

Represents an assignment statement in the Gosu grammar:

 assignment-statement
   <identifier> = <expression>
 

See Also:

• IGosuParser

Field Summary

Fields

Modifier and Type	Field	Description
protected Expression	_expression
protected Identifier	_identifier

Fields inherited from class gw.internal.gosu.parser.Statement

VOID_RETURN_VALUE

Fields inherited from class gw.internal.gosu.parser.ParsedElement

_tokens, UNDEF_FILE, UNDEF_FUNCTION, UNDEF_MODULE

Constructor Summary

Constructors

Constructor	Description
AssignmentStatement()

Method Summary

Modifier and Type	Method	Description
Object	execute()	Execute the expression.
Expression	getExpression()
Identifier	getIdentifier()
protected ITerminalStatement	getLeastSignificantTerminalStatement_internal(boolean[] bAbsolute)
private void	resetIdentifierType()	If the identifier was initialized without a type specification and a null value, the identifier's type becomes that of it's first assignment.
void	setExpression(Expression expression)
void	setIdentifier(Identifier identifier)
String	toString()	Subclasses should return a String representing the parsed statement.

Methods inherited from class gw.internal.gosu.parser.Statement

execute, getExcludedReturnTypeElements, getLeastSignificant, getLeastSignificantTerminalStatement, getReturnType, hasContent, isNoOp, setParent

Methods inherited from class gw.internal.gosu.parser.ParsedElement

addExceptionsFrom, addParseException, addParseException, addParseException, addParseExceptions, addParseIssues, addParseWarning, addParseWarning, addParseWarnings, addToken, adjustColumn, adjustLineNum, assignTokens, clearParseExceptions, clearParseTreeInformation, clearParseWarnings, compactParseTree, findAncestorParsedElementByType, findDeclaringStatement, findLineNumberOfDeclaration, findRootParsedElement, getAnnotations, getColumn, getContainedParsedElementsByType, getContainedParsedElementsByTypes, getContainedParsedElementsByTypesWithIgnoreSet, getEnclosingFeatureInfo, getFunctionName, getGosuClass, getGosuProgram, getImmediateParseIssue, getImmediateParseIssues, getLineNum, getLocation, getModule, getParent, getParseExceptions, getParseIssues, getParseWarnings, getQualifyingEnclosingTypeInfo, getTokens, hasImmediateParseIssue, hasImmediateParseWarning, hasImmediateParseWarnings, hasParseException, hasParseExceptions, hasParseIssue, hasParseIssues, hasParseWarning, hasParseWarnings, initEmptyParseTree, initLocation, isCompileTimeConstant, isSuppressed, isSuppressed, isSynthetic, makeDoubleValue, makeFloatValue, makeInteger, makeLong, removeParseException, removeParseWarning, removeParseWarningRecursively, setGosuProgram, setLineNum, setLocation, setSynthetic, shouldClearParseInfo, visit

Methods inherited from class java.lang.Object

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

Methods inherited from interface gw.lang.parser.IParsedElement

addExceptionsFrom, addParseException, addParseException, addParseWarning, addParseWarning, clearParseExceptions, clearParseTreeInformation, clearParseWarnings, findAncestorParsedElementByType, findDeclaringStatement, findRootParsedElement, getColumn, getContainedParsedElementsByType, getContainedParsedElementsByTypes, getContainedParsedElementsByTypesWithIgnoreSet, getFunctionName, getGosuClass, getGosuProgram, getImmediateParseIssue, getImmediateParseIssues, getLineNum, getLocation, getModule, getParent, getParseExceptions, getParseIssues, getParseWarnings, getReturnType, getTokens, hasImmediateParseIssue, hasImmediateParseWarnings, hasParseException, hasParseExceptions, hasParseIssue, hasParseIssues, hasParseWarning, hasParseWarnings, isCompileTimeConstant, isSuppressed, isSynthetic, setLocation, setParent, visit

Methods inherited from interface gw.lang.parser.IStatement

execute, getLeastSignificantTerminalStatement, hasContent

Field Details

_identifier

protected Identifier _identifier

_expression

protected Expression _expression

Constructor Details

AssignmentStatement

public AssignmentStatement()

Method Details

getIdentifier

public Identifier getIdentifier()

Specified by:

getIdentifier in interface IAssignmentStatement

Returns:

The left-hand-side identifier of the expression.

setIdentifier

public void setIdentifier(Identifier identifier)

Parameters:

identifier - The left-hand-side identifier of the expression.

getExpression

public Expression getExpression()

Specified by:

getExpression in interface IAssignmentStatement

Returns:

The right-hand-side expression of the assignment.

setExpression

public void setExpression(Expression expression)

Parameters:

expression - The right-hand-side expression of the assignment.

execute

public Object execute()

Execute the expression. Evaluates the RHS and assigns the resulting value to the symbol referenced by the LHS identifier.

Specified by:

execute in interface IStatement

Overrides:

execute in class Statement

getLeastSignificantTerminalStatement_internal

protected ITerminalStatement getLeastSignificantTerminalStatement_internal(boolean[] bAbsolute)

Specified by:

getLeastSignificantTerminalStatement_internal in class Statement

toString

public String toString()

Description copied from class: Statement

Subclasses should return a String representing the parsed statement.

Specified by:

toString in class Statement

resetIdentifierType

private void resetIdentifierType()

If the identifier was initialized without a type specification and a null value, the identifier's type becomes that of it's first assignment. TODO cgross: I don't think this is necessary any more. Remove it.