ideally distinguish computed properties from others

[mdaniel]

Prerequisites

• [X] Ensure you have latest version of plugin installed
• [X] Search for possible issue duplicates

Installation details

• [X] IDE version: Build #IU-192.6262.58, built on August 20, 2019
• [X] intellij-hcl plugin version: 0.7.5
• [X] Terraform version: Terraform v0.12.7

Terraform Configuration Files

provider "random" {
  version = "~> 2.2"
}
resource "random_string" "rnd" {
  length = 1
  result = "NOPE"
}

Expected Behavior

The completion dialog should understand that some properties (such as random_string.result) are computed and thus should not offer it for assignment in that context, and ideally would not tolerate it appearing in a block even if the user copy-pasted it there

Failing to offer it for assignment would be a huge win, detecting it after the fact would be a nice-to-have

Actual Behavior

Error: "result": this field cannot be set

  on foo.tf line 5, in resource "random_string" "rnd":
   5: resource "random_string" "rnd" {

Steps to Reproduce

1. Type the name of a computed property inside a resource block
2. Invoke completion
3. Observe the computed property is offered for completion

[VladRassokhin]

Fixed, will be available in 0.7.7. Non-configurable properties won't be advised in completion. Will add inspection later.