v1.16.5/internal/command/testdata/dynamic-module-sources/local-source-with-variable-default/main.tf - terraform - Git at Google

 variable "module_name" {
   type    = string
   const   = true
   default = "example"
 }

 module "example" {
   source = "./modules/${var.module_name}"
 }
	variable "module_name" {
	type = string
	const = true
	default = "example"
	}

	module "example" {
	source = "./modules/${var.module_name}"
	}