on:
  workflow_dispatch:
    inputs:
      a:
        type: choice
        options: []
      b:
        type: string
        options: [x]
      c:
        type: boolean
        default: foo
      d:
        type: string
        default: 5
      e:
        type: number
        default: 'x'
      f:
        type: boolean
        default: ${{ github.ref }}
jobs:
  a:
    runs-on: x
    steps: [{run: a}]