doslang-mirror/fec/tests/m8

M8 fixtures

M8 is the first multi-unit milestone, so cases live in subdirectories. Each case is compiled separately with that directory on the import path.

Pass cases:

• basic: public function across units.
• pubfld: public type and public field across units.
• errsame: two units use the same anonymous error.Name; the driver must assign one deterministic core.Error code.
• errdet: the same anonymous error-name set appears in a different source/import order; generated fe_errors.h must be byte-identical to errsame modulo the intentionally different unit graph.

Fail cases:

• privfn: private declaration access.
• privfld: private field access.
• missing: unresolved import.
• cycle: cyclic imports.
• unitbad: filename/unit-name mismatch.
• errnom: nominal error cannot flow into core.Error via try.

The current M5 TEST-DOS.BAT is intentionally unchanged. M8 should add procedural checks for .fei creation/hash invalidation and deterministic fe_errors.h using these fixtures.