gw.internal.gosu.parser

Class Expression

java.lang.Object

gw.internal.gosu.parser.ParsedElement

gw.internal.gosu.parser.Expression

All Implemented Interfaces:

IExpression, IHasType, IParsedElement

Direct Known Subclasses:

ArgumentListClause, ArithmeticExpression, ArrayAccess, BadInitializerExpression, BeanMethodCallExpression, BinaryExpression, BlockExpression, BlockInvocation, CaseClause, ClassDeclaration, CollectionInitializerExpression, ConditionalTernaryExpression, DefaultArgLiteral, DirectiveExpression, EvalExpression, FeatureLiteral, Identifier, InterfacesClause, Literal, LocalVarDeclaration, MapAccess, MapInitializerExpression, MemberAccess, MethodCallExpression, ModifierListClause, NameInDeclaration, NewExpression, ObjectInitializerExpression, ParameterListClause, ParenthesizedExpression, Program, StaticTypeOfExpression, SuperAccess, SuperTypeClause, TemplateStringLiteral, TypeAsExpression, TypeIsExpression, TypeOfExpression, TypeParameterListClause, TypeVariableDefinition, TypeVariableListClause, UnaryExpression, UnaryNotPlusMinusExpression

public abstract class Expression
extends ParsedElement
implements IExpression

The root class for all Expressions represented in a parse tree as specified in the Gosu grammar.

See Also:

IGosuParser

Field Summary

Fields

Modifier and Type	Field and Description
protected IType	_type

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

_tokens, UNDEF_FILE, UNDEF_FUNCTION, UNDEF_MODULE

Fields inherited from interface gw.lang.parser.IExpression

EMPTY_ARRAY

Constructor Summary

Constructors

Constructor and Description
Expression()

Method Summary

Modifier and Type	Method and Description
Object	evaluate()
Object	evaluate(IExternalSymbolMap externalSymbols)
IType	getContextType() Context type is the type this literal value evaluates as in the context of a containing expression e.g., given the expression, n == "42", the literal "42" is always converted to a Number.
IType	getReturnType()
IType	getType() Returns this Expression's IType.
protected IType	getTypeImpl()
boolean	isNullSafe()
boolean	isUnchecked()
void	setType(IType type) Sets this Expression's IType.
abstract String	toString() Subclasses should return a String representing the parsed expression.

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, setParent, setSynthetic, shouldClearParseInfo

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, getTokens, hasImmediateParseIssue, hasImmediateParseWarnings, hasParseException, hasParseExceptions, hasParseIssue, hasParseIssues, hasParseWarning, hasParseWarnings, isCompileTimeConstant, isSuppressed, isSynthetic, setLocation, setParent

Field Detail

_type

protected IType _type

Constructor Detail

Expression

public Expression()

Method Detail

getType

public IType getType()

Returns this Expression's IType.

Specified by:

getType in interface IHasType

getTypeImpl

protected IType getTypeImpl()

setType

public void setType(IType type)

Sets this Expression's IType.

isNullSafe

public boolean isNullSafe()

Specified by:

isNullSafe in interface IExpression

isUnchecked

public boolean isUnchecked()

Specified by:

isUnchecked in interface IExpression

evaluate

public Object evaluate()

Specified by:

evaluate in interface IExpression

evaluate

public Object evaluate(IExternalSymbolMap externalSymbols)

Specified by:

evaluate in interface IExpression

getReturnType

public IType getReturnType()

Specified by:

getReturnType in interface IParsedElement

getContextType

public IType getContextType()

Context type is the type this literal value evaluates as in the context of a containing expression e.g., given the expression, n == "42", the literal "42" is always converted to a Number. This feature is most useful for source code tools that provide source-sensitive help (e.g., rule composer).

Specified by:

getContextType in interface IExpression

toString

public abstract String toString()

Subclasses should return a String representing the parsed expression.

Overrides:

toString in class Object