Improve composition diagnostics

2026-06-22 17:37:51 +09:00
parent 8b3df21cfa
commit cc5ab63922
10 changed files with 518 additions and 175 deletions
@@ -117,3 +117,9 @@ Abstract { constraints, default: None }

 materialize は default を採用する唯一の段階である。
 通常評価中に明示値が得られた場合、default は採用されない。
+
+## Diagnostic context
+
+Composition and materialization keep source spans for object fields, constraints, defaults, and thunks where possible.
+When a conflict occurs, the diagnostic should identify the operation span and related participant spans, such as the left field, right field, constraint, or default value.
+For object materialization errors, diagnostics also include the field path being processed when known.