Terraform Type Constraints (Collection & Structural)

Type Constraints - Terraform Variables

• Type constraints control the type of variable values

• Primitive (Single type value)

  • number, string, bool

• Complex (Multiple types in a single variable)

  • list, tuple, map, object

Complex types - Collections

• Collection types allow multiple values of one primitive types to be grouped together.

• Constructors of these Collections include:

  • list(type)

  • map(type)

  • set(type)

Complex types - Structural

• Structural types allow multiple values of different primitive types to be grouped together

• Constructors of these Collections include:

  • object(type)

  • tuple(type)

  • set(type)

Dynamic types - The "any" constraint

• Any is a placeholder for primitive type yet to be decided

• Actual type will be determined at runtime