feat: add Fn::ForEach support for CloudFormation deploy-time loops#36801
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feat: add Fn::ForEach support for CloudFormation deploy-time loops#36801
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Core functionality: - Add Fn.forEach() and Fn.forEachRef() intrinsic functions - Add FnForEach class implementing IResolvable - Auto-add AWS::LanguageExtensions transform High-level constructs: - Add ForEachResource for creating multiple resources - Add ForEachOutput for creating multiple outputs - Add ForEachCondition for creating multiple conditions - Add CfnForEachFragment for template section injection Features: - Virtual CfnResource template for Aspect support - Loop variable validation (alphanumeric only) - Lazy evaluation for proper resolution order - Support for IResolvable collections - Helper methods: ref(), refFor(), getAtt(), getAttFor() Tests: - Add comprehensive test coverage for all ForEach constructs - Test transform auto-addition - Test validation and error cases
Core functionality: - Add Fn.forEach() intrinsic function with validation - Add Fn.forEachRef() for loop variable references - Add ForEachResource for creating multiple resources - Add ForEachOutput for creating multiple outputs - Add ForEachCondition for creating multiple conditions - Add CfnForEachFragment for template injection - Auto-add AWS::LanguageExtensions transform API improvements: - Add static type guards (isForEachResource, isForEachOutput, isForEachCondition) - Add ref(), getAtt(), refFor(), getAttFor() methods on ForEachResource - Support parameter references in collections - Add comprehensive JSDoc documentation Testing: - Add integration test for ForEach functionality - Add unit tests for all ForEach constructs - Add validation for alphanumeric loop names Documentation: - Add README section with examples - Add Rosetta fixture declarations
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Issue # (if applicable)
Closes #.
Reason for this change
Ensure ability to loop directly in CloudFormation for CDK-generated CloudFormation templates
Related: aws/aws-cdk-cli#1063
Description of changes
Core functionality:
API improvements:
Testing:
Documentation:
Describe any new or updated permissions being added
N/A
Description of how you validated changes
Validated via tests
Checklist
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license