TTQ Codeworks
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Exhaustive type states

Let the type system point to the missing case. TQ Codeworks is a workspace for following state changes through branches, data and the code that handles them.

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A concrete starting point · Exhaustive type states ×
switch (state.kind) {
  case 'ready': return render(state.data);
  case 'failed': return showError(state.error);
  default: return assertNever(state);
}
✳Handle a tagged union exhaustively.
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Illustrative workspace

  1. Connection

    Base URL, credentials and a reachable server.

  2. Project

    Add a new state in a test change and let the type checker reveal every branch that still needs an implementation.

  3. Review before applying

    Compare actual behavior with the expected result. If a check fails, investigate it before applying more changes.

Workflows

Exhaustive type states

Workflows ↗
A concrete starting point
switch (state.kind) {
  case 'ready': return render(state.data);
  case 'failed': return showError(state.error);
  default: return assertNever(state);
}
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