Expression Class

SystemObject
  Nova.CodeDOMCodeObject
    Nova.CodeDOMExpression
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C#

public abstract class Expression : CodeObject

	Name	Description
	Expression	Initializes a new instance of the Expression class
	Expression(Parser, CodeObject)	Parse an Expression.

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	Name	Description
	_AsString	This property is just to make debugging easier. (Inherited from CodeObject.)
	Annotations	Annotations (comments, attributes, directives, messages) associated with the current code object. (Inherited from CodeObject.)
	ColumnNumber	The column number associated with the CodeObject (if any, 0 if none). (Inherited from CodeObject.)
	Comment	The comment for the code object (if any). (Inherited from CodeObject.)
	DocComment	The documentation comment for the code object (if any). (Inherited from CodeObject.)
	EOLComment	The End-Of-Line comment for the code object (if any). (Inherited from CodeObject.)
	HasAnnotations	True if the code object has any annotations. (Inherited from CodeObject.)
	HasAttributes	True if the code object has any attributes. (Inherited from CodeObject.)
	HasComments	True if the code object has any comments of any kind. (Inherited from CodeObject.)
	HasCompilerDirectives	True if the code object has any compiler directive annotations. (Inherited from CodeObject.)
	HasDocComments	True if the code object has any documentation comments. (Inherited from CodeObject.)
	HasEOLComments	True if the code object has any EOL comments. (Inherited from CodeObject.)
	HasEOLOrPostAnnotations	True if the code object has any EOL or Postfix annotations. (Inherited from CodeObject.)
	HasErrors	True if the code object has any error messages. (Inherited from CodeObject.)
	HasFirstOnLineAnnotations	True if the code object has any annotations on separate lines. (Inherited from CodeObject.)
	HasInfixComments	True if the code object has any Infix comments. (Inherited from CodeObject.)
	HasMessages	True if the code object has any generated messages. (Inherited from CodeObject.)
	HasNoIndentation	Determines if the code object has no indentation. (Inherited from CodeObject.)
	HasNonEOLComments	True if the code object has any regular (non-doc) preceding (non-EOL, non-Infix, non-Postfix) comments. (Inherited from CodeObject.)
	HasParens	True if the expression is surrounded by parens.
	HasParensDefault	True if the expression should have parens by default.
	HasPostAnnotations	True if the code object has any postfix annotations. (Inherited from CodeObject.)
	HasTerminator	Determines if the code object has a terminator character. (Inherited from CodeObject.)
	HiddenRef	Any hidden reference to another CodeObject. (Inherited from CodeObject.)
	InfixComment	The infix comment for the code object (if any). (Inherited from CodeObject.)
	IsConst	True if the expression is const.
	IsDelegateType	True if the expression evaluates to a delegate type.
	IsEndFirstOnLine	True if the closing paren or bracket is on a new line.
	IsFirstOnLine	Determines if the code object appears as the first item on a line. (Inherited from CodeObject.)
	IsFirstOnLineDefault	True if the code object defaults to starting on a new line. (Overrides CodeObjectIsFirstOnLineDefault.)
	IsGenerated	Determines if the code object is generated. (Inherited from CodeObject.)
	IsGroupingSet	Determines if the 'grouping' (has parens or braces) status has been set. (Inherited from CodeObject.)
	IsNewLinesSet	Determines if the newline count has been set on the code object. (Inherited from CodeObject.)
	IsPossibleDelegateType	True if the expression evaluates to a delegate, unresolved, or dynamic type or a TypeParameterRef.
	IsRenderable	True if the CodeObject is renderable. (Inherited from CodeObject.)
	IsSingleLine	Determines if the code object only requires a single line for display. (Overrides CodeObjectIsSingleLine.)
	IsSingleLineDefault	True if the code object only requires a single line for display by default. (Inherited from CodeObject.)
	LineNumber	The line number associated with the CodeObject (if any, 0 if none). (Inherited from CodeObject.)
	NewLines	The number of newlines preceding the object (0 to N). (Inherited from CodeObject.)
	Parent	The parent CodeObject. (Inherited from CodeObject.)
	PostfixComment	The postfix comment for the code object (if any). (Inherited from CodeObject.)

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	Name	Description
	Accept	Accept the specified visitor object for the current code object and it's children. (Inherited from CodeObject.)
	AcceptAnnotations(IVisitor)	Accept the specified visitor object for all regular (non-EOL, non-Infix, non-Postfix) annotations (comments, attributes, compiler directives). (Inherited from CodeObject.)
	AcceptAnnotations(IVisitor, AnnotationFlags)	Accept the specified visitor object for all specified Infix or Postfix annotations (comments, compiler directives). (Inherited from CodeObject.)
	AcceptEOLComments	Accept the specified visitor object for all EOL comments. (Inherited from CodeObject.)
	AcceptInfixComments	Accept the specified visitor object for all Infix comments. (Inherited from CodeObject.)
	AcceptInfixEOLComments	Accept the specified visitor object for all Infix EOL comments. (Inherited from CodeObject.)
	AssociateCommentWhenParsing	Determine if the specified comment should be associated with the current code object during parsing. (Overrides CodeObjectAssociateCommentWhenParsing(CommentBase).)
	AsString	Render the entire code object as a string, using LFs for newlines. (Inherited from CodeObject.)
	AsText	Convert the code object to text with a trailing newline, and using CR/LF pairs for newlines (file format). (Inherited from CodeObject.)
	AsText(CodeWriter, CodeObjectRenderFlags)	(Overrides CodeObjectAsText(CodeWriter, CodeObjectRenderFlags).)
	AsText(CodeObjectRenderFlags, Boolean, StackCodeWriterAlignmentState)	Convert the code object to text using the specified flags and format (file or string). (Inherited from CodeObject.)
	AsTextAfter	(Inherited from CodeObject.)
	AsTextAnnotations(CodeWriter, CodeObjectRenderFlags)	Render all regular (non-EOL, non-Infix, non-Postfix, non-Message) annotations (comments, attributes, compiler directives). (Inherited from CodeObject.)
	AsTextAnnotations(CodeWriter, AnnotationFlags, CodeObjectRenderFlags)	Render all specified Infix or Postfix annotations (comments, compiler directives). (Inherited from CodeObject.)
	AsTextBefore	(Inherited from CodeObject.)
	AsTextEOLComments	Render all EOL comments. (Inherited from CodeObject.)
	AsTextEvaluatedType	(Inherited from CodeObject.)
	AsTextExpression
	AsTextInfixComments	Render all Infix comments with the specified mask. (Inherited from CodeObject.)
	AsTextInfixEOLComments	Render all Infix EOL comments. (Inherited from CodeObject.)
	AsTextLeftMostAnnotations	Render all regular annotations on the current object, or the left most binary operator. (Inherited from CodeObject.)
	AsTextLength	Determine the length of the code object if converted to a string using the specified flags. (Inherited from CodeObject.)
	AttachAnnotation(Annotation, Boolean)	Attach an Annotation (Comment, DocComment, Attribute, CompilerDirective, or Message) to the CodeObject. (Inherited from CodeObject.)
	AttachAnnotation(Annotation, AnnotationFlags, Boolean)	Attach an Annotation to the CodeObject at the specified position. (Inherited from CodeObject.)
	AttachComment	Create a comment object and attach it to the code object. (Inherited from CodeObject.)
	AttachEOLComment	Create an EOL comment object and attach it to the code object. (Inherited from CodeObject.)
	AttachMessage	Create a message and attach it to the code object. (Inherited from CodeObject.)
	CalculateMetrics	Calculate metrics for this code object and its children. (Inherited from CodeObject.)
	CheckForAlignment	Check for alignment of any EOL comments. (Inherited from CodeObject.)
	Clone	Deep-clone the code object. (Inherited from CodeObject.)
	CloneField(Object, Object)	Clone a field of a code object, including setting the parent. (Inherited from CodeObject.)
	CloneFieldT(T, T)	Clone a field of a code object, including setting the parent. (Inherited from CodeObject.)
	CopyFormatting	Copy formatting from another code object. (Inherited from CodeObject.)
	CreateAnnotations	Create the list of child Annotations, or return the existing one. (Inherited from CodeObject.)
	CreateRef	Create a reference to the CodeObject. (Inherited from CodeObject.)
	DefaultFormat	Default format the code object. (Overrides CodeObjectDefaultFormat.)
	DefaultFormatField	Default format the specified child field code object. (Inherited from CodeObject.)
	DefaultNewLines	Determine a default of 1 or 2 newlines when adding items to a Block. (Inherited from CodeObject.)
	Dispose	Dispose the CodeObject. (Inherited from CodeObject.)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	EvaluateType	Evaluate the type of the Expression.
	EvaluateTypeOrNamespace	Evaluate the Expression to a type or namespace. (Overrides CodeObjectEvaluateTypeOrNamespace(Boolean).)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	FindParentT	Find the parent object of the specified type. (Inherited from CodeObject.)
	FindParentMethod	Find the parent method (or anonymous method or lambda) of the current code object. (Inherited from CodeObject.)
	FindParentMethodOrType	Find the parent method (or anonymous method or lambda) or type of the current code object. (Inherited from CodeObject.)
	FindTypeArgument	Find a type argument for the specified type parameter.
	FirstPrefix	Get the expression on the left of the left-most Dot operator.
	FormatAsArgument	Format an expression assigned as an argument to another code object (turns off any parentheses).
	GetAllChildrenT	Get an enumerator for all children objects of type T in the CodeObject and in any child CodeObjects (recursively). (Inherited from CodeObject.)
	GetAttribute	Returns the first attribute expression (Call or ConstructorRef) with the specified name on the CodeObject. (Inherited from CodeObject.)
	GetComment	Get the comment that satisfies the specified predicate. (Inherited from CodeObject.)
	GetDelegateParameters	Get the delegate parameters if the expression evaluates to a delegate type.
	GetDelegateReturnType	Get the delegate return type if the expression evaluates to a delegate type.
	GetDescription	Get a short text description of the CodeObject. This is generally the shortest text representation that uniquely identifies objects, even if they have the same name, for example: type or return type, name, type parameters, parameters. (Inherited from CodeObject.)
	GetDocSummary	Returns the DocSummary documentation comment, or null if none exists. (Inherited from CodeObject.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetIndentLevel	Get the indent level of this object. (Inherited from CodeObject.)
	GetIndentSpaceCount	Get the current indent in spaces. (Inherited from CodeObject.)
	GetInferredType	Determine the type of an inferred ('var') type. (Inherited from CodeObject.)
	GetNamespace	Get the Namespace for this CodeObject. (Inherited from CodeObject.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetTypeRef	Get a TypeRef for the type with the specified full name, with caching (generally used for System types). (Inherited from CodeObject.)
	GetWorstMessageType	Get the type of the worst attached message. (Inherited from CodeObject.)
	HasAnnotationT	(Inherited from CodeObject.)
	HasAttribute	Returns true if the attribute with the specified name exists on the object, otherwise false. (Inherited from CodeObject.)
	HasImplicitConversion	Check if an implicit conversion will take place between the expression and its parent code object (Operator or VariableDecl). Conversions to type 'object' are not included, since there is no actual data conversion. The 'from' and 'to' types are returned whether an implicit conversion is available or not. Any applicable user-defined conversion method is returned.
	HasUnresolvedRef	Returns true if the code object is an UnresolvedRef or has any UnresolvedRef children. (Inherited from CodeObject.)
	IsChildIndented	Returns true if the specified child object is indented from the parent. (Inherited from CodeObject.)
	IsChildPrefix	Returns true if the specified child object is prefixed to the current object. (Inherited from CodeObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	MoveAllComments	Move all (regular or EOL) comments from the specified token to the current code object, converting any EOL comments to regular comments (which will be rendered inline if necessary). (Inherited from CodeObject.)
	MoveAnnotations	Move any annotations from the specified location to the specified destination location. (Inherited from CodeObject.)
	MoveComments(Token)	Move any non-EOL comments from the specified token to the current code object. (Inherited from CodeObject.)
	MoveComments(Token, Boolean)	Move any non-EOL comments from the specified token to the current code object. (Inherited from CodeObject.)
	MoveCommentsAsPost	Move any non-EOL comments from the specified token to the current code object as Post comments. (Inherited from CodeObject.)
	MoveCommentsToLeftMost	Move any comments from the specified Token to the left-most sub-expression.
	MoveEOLAndPostAnnotations	Move any EOL or Postfix annotations from the specified code object to the current code object. (Inherited from CodeObject.)
	MoveEOLComment(CodeObject)	Move any EOL comment from the specified code object to the current code object. (Inherited from CodeObject.)
	MoveEOLComment(Token)	Move any EOL comment from the specified token to the current code object. (Inherited from CodeObject.)
	MoveEOLComment(Token, Boolean, Boolean)	Move any EOL comment from the specified token to the current code object. (Inherited from CodeObject.)
	MoveEOLCommentAsInfix	Move any EOL comment from the specified token to the current code object as an Infix EOL comment. (Inherited from CodeObject.)
	MoveFormatting(CodeObject)	Move formatting from the specified code object to the current object. (Inherited from CodeObject.)
	MoveFormatting(Token)	Move formatting from the specified token to the current object. (Inherited from CodeObject.)
	MovePrefixAnnotationsAs	Move any prefix annotations on the specified code object to the current code object as the specified type of annotation. (Inherited from CodeObject.)
	NotifyListedAnnotationAdded	Propagate the listed annotation to the parent CodeUnit and above. (Inherited from CodeObject.)
	NotifyListedAnnotationRemoved	Remove the listed annotation from the parent CodeUnit and above. (Inherited from CodeObject.)
	Parse(Parser, CodeObject, Boolean, ParseFlags)	Parse an Expression.
	Parse(Parser, CodeObject, Boolean, String, ParseFlags)	Parse an expression, stopping when default terminators, or the specified terminators, or a higher-precedence operator is encountered.
	ParseAnnotations(Parser, CodeObject)	Parse annotations - specifically, compiler directives around things such as TypeParameters or ParameterDecls. (Inherited from CodeObject.)
	ParseAnnotations(Parser, CodeObject, Boolean, Boolean)	Parse any comments, attributes, compiler directives. (Inherited from CodeObject.)
	ParseDirectiveExpression	Parse a directive Expression.
	ParseExpectedToken	Parse the specified expected token, attaching a parse error to the current object if it doesn't exist. (Inherited from CodeObject.)
	ParseList	Parse a list of Expressions.
	ParseParenthesizedExpression	Parse a parenthesized Expression.
	ParseUnusedAnnotations	Parse annotations from the Unused list. (Inherited from CodeObject.)
	RemoveAllAnnotationsT	Remove all annotations of the specified type from this object. (Inherited from CodeObject.)
	RemoveAllAnnotationsWhereT	Remove all annotations from this object where the specified predicate is true. (Inherited from CodeObject.)
	RemoveAllMessages	Remove all messages from this object, or optionally only from the specified source. (Inherited from CodeObject.)
	RemoveAttribute	Remove the attribute expression with the specified name. (Inherited from CodeObject.)
	Resolve(ResolveFlags)	Resolve all child symbolic references. (Inherited from CodeObject.)
	Resolve(ResolveCategory, ResolveFlags)	Resolve all child symbolic references, using the specified ResolveCategory and ResolveFlags. (Inherited from CodeObject.)
	ResolveAttributes	Resolve any attached attributes. (Inherited from CodeObject.)
	ResolveDocComments	Resolve any references in attached documentation comments. (Inherited from CodeObject.)
	ResolveGotoTargetUp	Resolve child code objects that match the specified name are valid goto targets, moving up the tree until a complete match is found. (Inherited from CodeObject.)
	ResolveLocalDeclExprRef	Resolve any LocalDeclExpr in the Expression or its children that match the specified name.
	ResolveRef	Resolve child code objects that match the specified name.
	ResolveRefUp	Resolve child code objects that match the specified name, moving up the tree until a complete match is found. (Inherited from CodeObject.)
	ResolveRefUpSkipMethodBody	Similar to ResolveRefUp(String, Resolver), but skips trying to resolve the symbol in the body or parameters of a method (used for resolving parameter types). (Inherited from CodeObject.)
	SetField(Object, Object, Boolean)	Set a field of a code object, including setting the parent, and optional formatting. (Inherited from CodeObject.)
	SetFieldT(ChildListT, ChildListT)	Set a ChildList collection field of a code object, including setting the parent. (Inherited from CodeObject.)
	SetFieldT(T, T, Boolean)	Set a field of a code object, including setting the parent, and optional formatting. (Inherited from CodeObject.)
	SetFormatFlag	(Inherited from CodeObject.)
	SetLineCol(CodeObject)	Set the line and column numbers to those in the specified CodeObject. (Inherited from CodeObject.)
	SetLineCol(Token)	Set the line and column numbers to those in the specified token. (Inherited from CodeObject.)
	SetNewLines	Special method to set the newline count without setting the NewLinesSet flag. (Inherited from CodeObject.)
	SetStartLineCol	Set the starting line and column numbers to those in the specified token (used by some code objects with prefixes such as modifiers). (Inherited from CodeObject.)
	SkipPrefixes	Get the expression on the right of the right-most Lookup or Dot operator (bypass any '::' and '.' prefixes).
	ToString	Render the type of the code object and its description as a string. (Inherited from CodeObject.)
	UpdateAllDeclExpressions	Recursively update the dictionary of names in the specified Block by either adding or removing (as specified by the 2nd parameter) all appropriate nested INamedCodeObjects expressions in the current CodeObject tree (specifically implemented for LocalDeclExpr expression objects). (Inherited from CodeObject.)
	UpdateLineCol	Update the line and column numbers according to the current positions in the CodeWriter, if the UpdateLineCol flag is set. (Inherited from CodeObject.)

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	Name	Description
	(Boolean to Expression)	Implicit conversion of a bool to an Expression (actually, a Literal).
	(Char to Expression)	Implicit conversion of a char to an Expression (actually, a Literal).
	(Decimal to Expression)	Implicit conversion of a decimal to an Expression (actually, a Literal).
	(Double to Expression)	Implicit conversion of a double to an Expression (actually, a Literal).
	(Int32 to Expression)	Implicit conversion of an int to an Expression (actually, a Literal).
	(Int64 to Expression)	Implicit conversion of a long to an Expression (actually, a Literal).
	(EventInfo to Expression)	Implicit conversion of a EventInfo to an Expression (actually, a EventRef).
	(FieldInfo to Expression)	Implicit conversion of a FieldInfo to an Expression (actually, a FieldRef).
	(MethodBase to Expression)	Implicit conversion of a MethodBase to an Expression (actually, a MethodRef or ConstructorRef).
	(PropertyInfo to Expression)	Implicit conversion of a PropertyInfo to an Expression (actually, a PropertyRef).
	(Single to Expression)	Implicit conversion of a float to an Expression (actually, a Literal).
	(String to Expression)	Implicit conversion of a string to an Expression (actually, a Literal).
	(Type to Expression)	Implicit conversion of a Type to an Expression (actually, a TypeRef).
	(UInt32 to Expression)	Implicit conversion of a uint to an Expression (actually, a Literal).
	(UInt64 to Expression)	Implicit conversion of a ulong to an Expression (actually, a Literal).
	(EventReference to Expression)	Implicit conversion of a EventReference to an Expression (actually, a EventRef).
	(FieldReference to Expression)	Implicit conversion of a FieldReference to an Expression (actually, a FieldRef).
	(MethodReference to Expression)	Implicit conversion of a MethodReference to an Expression (actually, a MethodRef or ConstructorRef).
	(Namespace to Expression)	Implicit conversion of a Namespace to an Expression (actually, a NamespaceRef).
	(PropertyReference to Expression)	Implicit conversion of a PropertyReference to an Expression (actually, a PropertyRef).
	(Statement to Expression)	Implicit conversion of a Statement to an Expression.
	(TypeParameter to Expression)	Implicit conversion of a TypeParameter to an Expression (actually, a TypeParameterRef).
	(TypeReference to Expression)	Implicit conversion of a TypeReference to an Expression (actually, a TypeRef).

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	Name	Description
	_annotations	Any Annotations (Comments, DocComments, Attributes, or Messages) associated with the CodeObject (null if none). (Inherited from CodeObject.)
	_columnNumber	The starting column number associated with the CodeObject if parsed from or written to text form. (Inherited from CodeObject.)
	_formatFlags	Formatting flags - for line feeds, braces, etc. (Inherited from CodeObject.)
	_lineNumber	The starting line number associated with the CodeObject if parsed from or written to text form. (Inherited from CodeObject.)
	_parent	The parent CodeObject. (Inherited from CodeObject.)
	ParseTokenEndGroup	The token used to parse the end of a group.
	ParseTokenSeparator	The token used to parse between expressions in a list.
	ParseTokenStartGroup	The token used to parse the start of a group.

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Expressions often occur in trees, and can include operators, indexers, method (and property) calls, which operate on variables, constants, fields, etc., resulting in a specific type and value. Expressions which are valid as statements are: Assignment (and all compound assignments), Call, Increment/Decrement, PostIncrement/Decrement, Dot, and NewObject.

Reference

Nova.CodeDOM Namespace

SystemObject
  Nova.CodeDOMCodeObject
    Nova.CodeDOMExpression
      Nova.CodeDOMAnonymousMethodBase
      Nova.CodeDOMInitializer
      Nova.CodeDOMLiteral
      Nova.CodeDOMLocalDeclExpr
      Nova.CodeDOMNamedArgument
      Nova.CodeDOMOperator
      Nova.CodeDOMOrdering
      Nova.CodeDOMQueryBodyBase
      Nova.CodeDOMSymbolicRef
      Nova.CodeDOMTempExpr
      Nova.CodeDOMThrowExpr
      Nova.CodeDOMUnrecognized