From 2c0610223201705b85d20fd72f1e7e9c565aff8b Mon Sep 17 00:00:00 2001
From: Robert Sesek <rsesek@bluestatic.org>
Date: Sat, 25 Mar 2023 12:55:08 -0400
Subject: [PATCH] Add some `extends object` constraints to type parameters to
 fix errors.

---
 src/core/Form.ts | 2 +-
 src/core/Line.ts | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/core/Form.ts b/src/core/Form.ts
index 5d03a2f..3893fae 100644
--- a/src/core/Form.ts
+++ b/src/core/Form.ts
@@ -9,7 +9,7 @@ import * as Trace from './Trace';
 import { Line } from './Line';
 import { InconsistencyError, NotFoundError } from './Errors';
 
-export default abstract class Form<I = unknown> {
+export default abstract class Form<I extends object = any> {
   abstract readonly name: string;
 
   abstract readonly lines: { [key: string]: Line<any> };
diff --git a/src/core/Line.ts b/src/core/Line.ts
index 46d0fe0..27b48b7 100644
--- a/src/core/Line.ts
+++ b/src/core/Line.ts
@@ -117,7 +117,7 @@ export class SymbolicLine<F extends Form & { [key in K]: ComputeFunc<ReturnType<
   }
 }
 
-export class InputLine<U = unknown, T extends keyof U = any> extends Line<U[T]> {
+export class InputLine<U extends object, T extends keyof U = any> extends Line<U[T]> {
   private _input: T;
   private _fallback: U[T];
 
-- 
2.43.5