variables.tf

terraform {
    experiments = [variable_validation]
}

variable "maps" {
    description = "A list of maps to merge. Maps should be ordered in increasing precedence, i.e. values in a map later in the list will overwrite values in a map earlier in the list."
    type = any
    validation {
        condition = try(tonumber(var.maps), tobool(var.maps), tostring(var.maps), tomap(var.maps), null) == null
        error_message = "The `maps` variable must be a list of maps and/or objects. The provided value is not a list."
    }
    validation {
        condition = !can(index([
                for mp in var.maps:
                try(tolist(mp), toset(mp), tonumber(mp), tobool(mp), tostring(mp), null) == null
            ]
            , false))
        error_message = "The `maps` variable must be a list of maps and/or objects. Not all elements meet this requirement."
    }
}