Package google.type
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Expr
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.
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Last updated 2025-05-30 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-05-30 UTC."],[[["\u003cp\u003eExpr is a message type representing a textual expression in Common Expression Language (CEL) syntax, which is documented externally.\u003c/p\u003e\n"],["\u003cp\u003eCEL expressions define logic, equality, comparisons, and data manipulation, as demonstrated by various examples in the provided content.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eexpression\u003c/code\u003e field within Expr holds the actual CEL expression string, whereas the optional \u003ccode\u003etitle\u003c/code\u003e and \u003ccode\u003edescription\u003c/code\u003e fields provide context for its purpose.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003elocation\u003c/code\u003e field of the Expr message type can be used for error reporting.\u003c/p\u003e\n"],["\u003cp\u003eThe service evaluating the CEL expression determines which variables and functions can be referenced within it.\u003c/p\u003e\n"]]],[],null,["# Package google.type\n\nIndex\n-----\n\n- [Expr](/certificate-authority-service/docs/reference/rpc/google.type#google.type.Expr) (message)\n\nExpr\n----\n\nRepresents 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 \u003chttps://github.com/google/cel-spec\u003e.\n\nExample (Comparison): \n\n title: \"Summary size limit\"\n description: \"Determines if a summary is less than 100 chars\"\n expression: \"document.summary.size() \u003c 100\"\n\nExample (Equality): \n\n title: \"Requestor is owner\"\n description: \"Determines if requestor is the document owner\"\n expression: \"document.owner == request.auth.claims.email\"\n\nExample (Logic): \n\n title: \"Public documents\"\n description: \"Determine whether the document should be publicly visible\"\n expression: \"document.type != 'private' && document.type != 'internal'\"\n\nExample (Data Manipulation): \n\n title: \"Notification string\"\n description: \"Create a notification string with a timestamp.\"\n expression: \"'New message received at ' + string(document.create_time)\"\n\nThe 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."]]
