Feature request checklist

• There are no issues that match the desired change
• The change is large enough it can't be addressed with a simple Pull Request
• If this is a bug, please file a Bug Report.

Change
To make CEL environment setup consistent across CEL implementations, I propose to add a runtime option equivalent to CEL-cpp InterpreterOptions.enable_comprehension to CEL-Go and CEL-Java (corresponding ticket google/cel-java#484).

In Java, runtime CEL comprehensions can be limited using comprehensionMaxIterations(int value) runtime option. Setting value to 0 disables the comprehension macros. If the limit is reached, program evaluation throws CelEvaluationException with CelErrorCode.ITERATION_BUDGET_EXCEEDED.

There is no option equivalent to comprehensionMaxIterations() in CEL-Go . Similar to google/cel-java#484, the new Go option equivalent to cpp's enable_comprehension could use comprehensionMaxIterations(0) under-the-hood.

Example

// Actual option names up to the implementer.
prg, err := env.Program(ast, EvalOptions(OptDisableComprehension))

// Equivalent:
prg, err := env.Program(ast, ComprehensionMaxIterations(0))

Related
Internal ref: go/grpc-cel-integration