chore: rename EFFECT_HAS_DERIVED to EFFECT_PRESERVED

Author: Rich-Harris

packages/svelte/src/internal/client/constants.js

@@ -17,7 +17,7 @@ export const EFFECT_RAN = 1 << 15;
 export const EFFECT_TRANSPARENT = 1 << 16;
 export const INSPECT_EFFECT = 1 << 18;
 export const HEAD_EFFECT = 1 << 19;
-export const EFFECT_HAS_DERIVED = 1 << 20;
+export const EFFECT_PRESERVED = 1 << 20;
 export const EFFECT_IS_UPDATING = 1 << 21;
 
 export const STATE_SYMBOL = Symbol('$state');

packages/svelte/src/internal/client/reactivity/deriveds.js

@@ -1,6 +1,6 @@
 /** @import { Derived, Effect } from '#client' */
 import { DEV } from 'esm-env';
-import { CLEAN, DERIVED, DIRTY, EFFECT_HAS_DERIVED, MAYBE_DIRTY, UNOWNED } from '#client/constants';
+import { CLEAN, DERIVED, DIRTY, EFFECT_PRESERVED, MAYBE_DIRTY, UNOWNED } from '#client/constants';
 import {
 	active_reaction,
 	active_effect,
@@ -38,7 +38,7 @@ export function derived(fn) {
 	} else {
 		// Since deriveds are evaluated lazily, any effects created inside them are
 		// created too late to ensure that the parent effect is added to the tree
-		active_effect.f |= EFFECT_HAS_DERIVED;
+		active_effect.f |= EFFECT_PRESERVED;
 	}
 
 	/** @type {Derived<V>} */

packages/svelte/src/internal/client/reactivity/effects.js

@@ -31,7 +31,7 @@ import {
 	INSPECT_EFFECT,
 	HEAD_EFFECT,
 	MAYBE_DIRTY,
-	EFFECT_HAS_DERIVED,
+	EFFECT_PRESERVED,
 	BOUNDARY_EFFECT,
 	STALE_REACTION
 } from '#client/constants';
@@ -135,7 +135,7 @@ function create_effect(type, fn, sync, push = true) {
 		effect.first === null &&
 		effect.nodes_start === null &&
 		effect.teardown === null &&
-		(effect.f & (EFFECT_HAS_DERIVED | BOUNDARY_EFFECT)) === 0;
+		(effect.f & (EFFECT_PRESERVED | BOUNDARY_EFFECT)) === 0;
 
 	if (!inert && push) {
 		if (parent !== null) {