Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 10356x 20x 20x 14x 20x 6x 6x 20x 10356x 10356x 10356x 2x 2x 2x 2x 2x 2x 2x 2x 5637x 5637x 5637x 5637x 2x 2x 2x 2x 2x 16229x 16229x 16229x 16229x 16229x 10x 10x 10x 14x 14x 10x 16229x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 16216x 16216x 16216x 16216x 16216x 1x 1x 16215x 16215x 16215x 16215x 16215x 16216x 16216x 16216x 16216x 16211x 16211x 16216x 16216x 16216x 16216x 16216x 16216x 16216x 16020x 16020x 16020x 16216x 2x 2x 2x 2x 2x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x | /** @import { Derived } from '#client' */
import { DEV } from 'esm-env';
import { CLEAN, DERIVED, DESTROYED, DIRTY, MAYBE_DIRTY, UNOWNED } from '../constants.js';
import {
current_reaction,
current_effect,
remove_reactions,
set_signal_status,
current_skip_reaction,
update_reaction,
destroy_effect_children,
increment_version
} from '../runtime.js';
import { equals, safe_equals } from './equality.js';
import * as e from '../errors.js';
/**
* @template V
* @param {() => V} fn
* @returns {Derived<V>}
*/
/*#__NO_SIDE_EFFECTS__*/
export function derived(fn) {
let flags = DERIVED | DIRTY;
if (current_effect === null) flags |= UNOWNED;
/** @type {Derived<V>} */
const signal = {
deps: null,
deriveds: null,
equals,
f: flags,
first: null,
fn,
last: null,
reactions: null,
v: /** @type {V} */ (null),
version: 0
};
if (current_reaction !== null && (current_reaction.f & DERIVED) !== 0) {
var current_derived = /** @type {Derived} */ (current_reaction);
if (current_derived.deriveds === null) {
current_derived.deriveds = [signal];
} else {
current_derived.deriveds.push(signal);
}
}
return signal;
}
/**
* @template V
* @param {() => V} fn
* @returns {Derived<V>}
*/
/*#__NO_SIDE_EFFECTS__*/
export function derived_safe_equal(fn) {
const signal = derived(fn);
signal.equals = safe_equals;
return signal;
}
/**
* @param {Derived} derived
* @returns {void}
*/
function destroy_derived_children(derived) {
destroy_effect_children(derived);
var deriveds = derived.deriveds;
if (deriveds !== null) {
derived.deriveds = null;
for (var i = 0; i < deriveds.length; i += 1) {
destroy_derived(deriveds[i]);
}
}
}
/**
* The currently updating deriveds, used to detect infinite recursion
* in dev mode and provide a nicer error than 'too much recursion'
* @type {Derived[]}
*/
let stack = [];
/**
* @param {Derived} derived
* @returns {void}
*/
export function update_derived(derived) {
var value;
if (DEV) {
try {
if (stack.includes(derived)) {
e.derived_references_self();
}
stack.push(derived);
destroy_derived_children(derived);
value = update_reaction(derived);
} finally {
stack.pop();
}
} else {
destroy_derived_children(derived);
value = update_reaction(derived);
}
var status =
(current_skip_reaction || (derived.f & UNOWNED) !== 0) && derived.deps !== null
? MAYBE_DIRTY
: CLEAN;
set_signal_status(derived, status);
if (!derived.equals(value)) {
derived.v = value;
derived.version = increment_version();
}
}
/**
* @param {Derived} signal
* @returns {void}
*/
function destroy_derived(signal) {
destroy_derived_children(signal);
remove_reactions(signal, 0);
set_signal_status(signal, DESTROYED);
// TODO we need to ensure we remove the derived from any parent derives
signal.first =
signal.last =
signal.deps =
signal.reactions =
// @ts-expect-error `signal.fn` cannot be `null` while the signal is alive
signal.fn =
null;
}
|