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.
Namespace
Google.TypeAssembly
Google.Api.CommonProtos.dll
Constructors
Expr()
public Expr()
Expr(Expr)
public Expr(Expr other)
Fields
DescriptionFieldNumber
public
const
int
DescriptionFieldNumber
=
3
Field number for the "description" field.
ExpressionFieldNumber
public
const
int
ExpressionFieldNumber
=
1
Field number for the "expression" field.
LocationFieldNumber
public
const
int
LocationFieldNumber
=
4
Field number for the "location" field.
TitleFieldNumber
public
const
int
TitleFieldNumber
=
2
Field number for the "title" field.
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.
Descriptor
public static MessageDescriptor Descriptor { get; }
Expression
public string Expression { get; set; }
Textual representation of an expression in Common Expression Language syntax.
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.
Parser
public static MessageParser<Expr> Parser { get; }
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.
Methods
CalculateSize()
public int CalculateSize()
Calculates the size of this message in Protocol Buffer wire format, in bytes.
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.
Equals(Expr)
public bool Equals(Expr other)
Equals(object)
public override bool Equals(object other)
GetHashCode()
public override int GetHashCode()
MergeFrom(CodedInputStream)
public void MergeFrom(CodedInputStream input)
Merges the data from the specified coded input stream with the current message.
See the user guide for precise merge semantics.
MergeFrom(Expr)
public void MergeFrom(Expr other)
Merges the given message into this one.
See the user guide for precise merge semantics.
ToString()
public override string ToString()
WriteTo(CodedOutputStream)
public void WriteTo(CodedOutputStream output)
Writes the data to the given coded output stream.
output
