Checking Semantics

For implementation, see CheckSemantics.scala.

Input

1. A list tul of translation units

Output

1. If the semantic check passes, an analysis data structure a representing the results of the analysis.

2. Otherwise an error and no output.

Procedure

1. Create an empty analysis data structure a.

2. Enter symbols for a and tul.

3. Check uses for a and tul.

4. Check use def cycles for a and tul.

5. Check type uses for a and tul.

6. Check expression types for a and tul.

7. Evaluate implied enum constants for a and tul.

8. Evaluate constant expressions for a and tul.

9. Finalize type definitions for a and tul.

10. Check port definitions for a and tul.

11. Check component definitions for a and tul.

12. Check component instance definitions for a and tul.

13. Check topology definitions for a and tul.

14. Check location specifiers for a and tul.