Class Expr (2.10.0)

public sealed class Expr : IMessage<Expr>, IEquatable<Expr>, IDeepCloneable<Expr>, IBufferMessage, IMessage

Represents a textual expression in the Common Expression Language (CEL) syntax. CEL is a C-like expression language. The syntax and semantics of CEL are documented at https://github.com/google/cel-spec.

Example (Comparison):

title: "Summary size limit"
description: "Determines if a summary is less than 100 chars"
expression: "document.summary.size() < 100"

Example (Equality):

title: "Requestor is owner"
description: "Determines if requestor is the document owner"
expression: "document.owner == request.auth.claims.email"

Example (Logic):

title: "Public documents"
description: "Determine whether the document should be publicly visible"
expression: "document.type != 'private' && document.type != 'internal'"

Example (Data Manipulation):

title: "Notification string"
description: "Create a notification string with a timestamp."
expression: "'New message received at ' + string(document.create_time)"

The exact variables and functions that may be referenced within an expression are determined by the service that evaluates it. See the service documentation for additional information.

Inheritance

object > Expr

Namespace

Google.Type

Assembly

Google.Api.CommonProtos.dll

Constructors

Expr()

public Expr()

Expr(Expr)

public Expr(Expr other)
Parameter
NameDescription
otherExpr

Fields

DescriptionFieldNumber

public const int DescriptionFieldNumber = 3

Field number for the "description" field.

Field Value
TypeDescription
int

ExpressionFieldNumber

public const int ExpressionFieldNumber = 1

Field number for the "expression" field.

Field Value
TypeDescription
int

LocationFieldNumber

public const int LocationFieldNumber = 4

Field number for the "location" field.

Field Value
TypeDescription
int

TitleFieldNumber

public const int TitleFieldNumber = 2

Field number for the "title" field.

Field Value
TypeDescription
int

Properties

Description

public string Description { get; set; }

Optional. Description of the expression. This is a longer text which describes the expression, e.g. when hovered over it in a UI.

Property Value
TypeDescription
string

Descriptor

public static MessageDescriptor Descriptor { get; }
Property Value
TypeDescription
MessageDescriptor

Expression

public string Expression { get; set; }

Textual representation of an expression in Common Expression Language syntax.

Property Value
TypeDescription
string

Location

public string Location { get; set; }

Optional. String indicating the location of the expression for error reporting, e.g. a file name and a position in the file.

Property Value
TypeDescription
string

Parser

public static MessageParser<Expr> Parser { get; }
Property Value
TypeDescription
MessageParserExpr

Title

public string Title { get; set; }

Optional. Title for the expression, i.e. a short string describing its purpose. This can be used e.g. in UIs which allow to enter the expression.

Property Value
TypeDescription
string

Methods

CalculateSize()

public int CalculateSize()
Returns
TypeDescription
int

Clone()

public Expr Clone()
Returns
TypeDescription
Expr

Equals(Expr)

public bool Equals(Expr other)
Parameter
NameDescription
otherExpr
Returns
TypeDescription
bool

Equals(object)

public override bool Equals(object other)
Parameter
NameDescription
otherobject
Returns
TypeDescription
bool
Overrides

GetHashCode()

public override int GetHashCode()
Returns
TypeDescription
int
Overrides

MergeFrom(CodedInputStream)

public void MergeFrom(CodedInputStream input)
Parameter
NameDescription
inputCodedInputStream

MergeFrom(Expr)

public void MergeFrom(Expr other)
Parameter
NameDescription
otherExpr

ToString()

public override string ToString()
Returns
TypeDescription
string
Overrides

WriteTo(CodedOutputStream)

public void WriteTo(CodedOutputStream output)
Parameter
NameDescription
outputCodedOutputStream