terraform/website/docs/configuration/functions/list.html.md

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language list - Functions - Configuration Language docs-funcs-collection-list The list function constructs a list from some given elements.

list Function

-> Note: This page is about Terraform 0.12 and later. For Terraform 0.11 and earlier, see 0.11 Configuration Language: Interpolation Syntax.

The list function is no longer available. Prior to Terraform v0.12 it was the only available syntax for writing a literal list inside an expression, but Terraform v0.12 introduced a new first-class syntax.

To update an expression like list(a, b, c), write the following instead:

tolist([a, b, c])

The [ ... ] brackets construct a tuple value, and then the tolist function then converts it to a list. For more information on the value types in the Terraform language, see Type Constraints.

  • concat produces a new list by concatenating together the elements from other lists.
  • tolist converts a set or tuple value to a list.