Class Expr (2.15.0) 

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
Name Description
other Expr

Fields

DescriptionFieldNumber

public const int DescriptionFieldNumber = 3

Field number for the "description" field.

Field Value
Type Description
int

ExpressionFieldNumber

public const int ExpressionFieldNumber = 1

Field number for the "expression" field.

Field Value
Type Description
int

LocationFieldNumber

public const int LocationFieldNumber = 4

Field number for the "location" field.

Field Value
Type Description
int

TitleFieldNumber

public const int TitleFieldNumber = 2

Field number for the "title" field.

Field Value
Type Description
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
Type Description
string

Descriptor

public static MessageDescriptor Descriptor { get; }
Property Value
Type Description
MessageDescriptor

Expression

public string Expression { get; set; }

Textual representation of an expression in Common Expression Language syntax.

Property Value
Type Description
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
Type Description
string

Parser

public static MessageParser<Expr> Parser { get; }
Property Value
Type Description
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
Type Description
string

Methods

CalculateSize()

public int CalculateSize()

Calculates the size of this message in Protocol Buffer wire format, in bytes.

Returns
Type Description
int

The number of bytes required to write this message to a coded output stream.

Clone()

public Expr Clone()

Creates a deep clone of this object.

Returns
Type Description
Expr

A deep clone of this object.

Equals(Expr)

public bool Equals(Expr other)
Parameter
Name Description
other Expr
Returns
Type Description
bool

Equals(object)

public override bool Equals(object other)
Parameter
Name Description
other object
Returns
Type Description
bool
Overrides

GetHashCode()

public override int GetHashCode()
Returns
Type Description
int
Overrides

MergeFrom(CodedInputStream)

public void MergeFrom(CodedInputStream input)

Merges the data from the specified coded input stream with the current message.

Parameter
Name Description
input CodedInputStream
Remarks

See the user guide for precise merge semantics.

MergeFrom(Expr)

public void MergeFrom(Expr other)

Merges the given message into this one.

Parameter
Name Description
other Expr
Remarks

See the user guide for precise merge semantics.

ToString()

public override string ToString()
Returns
Type Description
string
Overrides

WriteTo(CodedOutputStream)

public void WriteTo(CodedOutputStream output)

Writes the data to the given coded output stream.

Parameter
Name Description
output CodedOutputStream

Coded output stream to write the data to. Must not be null.