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LDC-E1102 — A package cannot import itself

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# LDC-E1102 — A package cannot import itself

## What it means

Imports form a dependency graph between packages, and that graph must
stay acyclic: a package already sees everything it declares, so naming
itself as a dependency is never needed and always rejected. When the
import names the very package being written, the compiler stops at the
import line.

The repair is deletion: remove the self-import. Nothing it could have
provided is lost, because the own declarations were visible all along.

## Example

```law
language "law.core" version "0.2";
package demo.diagnostics version "0.1.0";
namespace "urn:law:demo:diagnostics";
import demo.diagnostics version "0.1.0";

entity Applicant;
```

## Fix

```law
language "law.core" version "0.2";
package demo.diagnostics version "0.1.0";
namespace "urn:law:demo:diagnostics";

entity Applicant;
```

## Engine message

The engine reports this in its own wording:

```text
example.law:4:1: error LDC-E1102: package "demo.diagnostics" imports itself (§23: imports acyclic)
```

## Related

- [LDC-E1103](/diagnostics/LDC-E1103/) — the same import declared twice is rejected too.
- [Vocabulary](/constructs/vocabulary/) — how names are declared and which positions take them.