E2431 for-in statement cannot operate on collection type '%s' because '%s' does not contain a member for '%s', or it is inaccessible (Delphi)

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A for-in statement can only operate on the following collection types:

  • Primitive types that the compiler recognizes, such as arrays, sets or strings
  • Types that implement IEnumerable
  • Types that implement the GetEnumerator pattern as documented in the Delphi Language Guide

Ensure that the specified type meets these requirements.

See Also

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