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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 389x 389x 387x 387x 2x 2x 2x 2x 2x 2x 8x 8x 8x 8x 8x 8x 2x 2x 2x 2x 2x 2x 2x 2407x 2407x 2407x 2407x 2747x 2747x 2747x 2747x 2747x 2747x 2747x 439x 439x 439x 439x 439x 2308x 2747x 1919x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 5x 5x 1914x 1914x 1914x 1914x 1914x 1914x 1914x 1914x 1914x 1914x 1914x 1919x 1919x 1919x 1919x 1919x 1919x 1919x 1919x 389x 389x 389x 389x 389x 2747x 2747x 2747x 2747x 2407x 2407x 2407x 2407x 2407x 2407x 2407x 2x 2x 145x 2x 2x 2x 143x 143x 143x 143x 143x 143x 143x 143x 145x 143x 143x 143x 143x 143x 145x 124x 124x 143x 143x 143x 143x 143x 145x 219x 179x 179x 179x 179x 179x 179x 219x 112x 112x 179x 179x 179x 143x 143x 143x 143x 143x 143x 143x 145x 145x 145x 145x 145x 145x 145x 2x 2x 1x 1x 1x 1x 1x 1x 1x 1x 2x | import { is_hoistable_function } from '../../utils.js';
import * as b from '../../../../utils/builders.js';
import { extract_paths } from '../../../../utils/ast.js';
import { get_prop_source, serialize_get_binding } from '../utils.js';
/**
* Creates the output for a state declaration.
* @param {import('estree').VariableDeclarator} declarator
* @param {import('../../../scope.js').Scope} scope
* @param {import('estree').Expression} value
*/
function create_state_declarators(declarator, scope, value) {
if (declarator.id.type === 'Identifier') {
return [b.declarator(declarator.id, b.call('$.mutable_source', value))];
}
const tmp = scope.generate('tmp');
const paths = extract_paths(declarator.id);
return [
b.declarator(b.id(tmp), value),
...paths.map((path) => {
const value = path.expression?.(b.id(tmp));
const binding = scope.get(/** @type {import('estree').Identifier} */ (path.node).name);
return b.declarator(
path.node,
binding?.kind === 'state' ? b.call('$.mutable_source', value) : value
);
})
];
}
/** @type {import('../types.js').ComponentVisitors} */
export const javascript_visitors_legacy = {
VariableDeclaration(node, { state, visit }) {
/** @type {import('estree').VariableDeclarator[]} */
const declarations = [];
for (const declarator of node.declarations) {
const bindings = /** @type {import('#compiler').Binding[]} */ (
state.scope.get_bindings(declarator)
);
const has_state = bindings.some((binding) => binding.kind === 'state');
const has_props = bindings.some((binding) => binding.kind === 'bindable_prop');
if (!has_state && !has_props) {
const init = declarator.init;
if (init != null && is_hoistable_function(init)) {
const hoistable_function = visit(init);
state.hoisted.push(
b.declaration(
'const',
declarator.id,
/** @type {import('estree').Expression} */ (hoistable_function)
)
);
continue;
}
declarations.push(/** @type {import('estree').VariableDeclarator} */ (visit(declarator)));
continue;
}
if (has_props) {
if (declarator.id.type !== 'Identifier') {
// Turn export let into props. It's really really weird because export let { x: foo, z: [bar]} = ..
// means that foo and bar are the props (i.e. the leafs are the prop names), not x and z.
const tmp = state.scope.generate('tmp');
const paths = extract_paths(declarator.id);
declarations.push(
b.declarator(
b.id(tmp),
/** @type {import('estree').Expression} */ (
visit(/** @type {import('estree').Expression} */ (declarator.init))
)
)
);
for (const path of paths) {
const name = /** @type {import('estree').Identifier} */ (path.node).name;
const binding = /** @type {import('#compiler').Binding} */ (state.scope.get(name));
const value = path.expression?.(b.id(tmp));
declarations.push(
b.declarator(
path.node,
binding.kind === 'bindable_prop'
? get_prop_source(binding, state, binding.prop_alias ?? name, value)
: value
)
);
}
continue;
}
const binding = /** @type {import('#compiler').Binding} */ (
state.scope.get(declarator.id.name)
);
declarations.push(
b.declarator(
declarator.id,
get_prop_source(
binding,
state,
binding.prop_alias ?? declarator.id.name,
declarator.init && /** @type {import('estree').Expression} */ (visit(declarator.init))
)
)
);
continue;
}
declarations.push(
...create_state_declarators(
declarator,
state.scope,
/** @type {import('estree').Expression} */ (declarator.init && visit(declarator.init))
)
);
}
if (declarations.length === 0) {
return b.empty;
}
return {
...node,
declarations
};
},
LabeledStatement(node, context) {
if (context.path.length > 1 || node.label.name !== '$') {
context.next();
return;
}
const state = context.state;
// To recreate Svelte 4 behaviour, we track the dependencies
// the compiler can 'see', but we untrack the effect itself
const reactive_stmt = /** @type {import('#compiler').ReactiveStatement} */ (
state.analysis.reactive_statements.get(node)
);
if (!reactive_stmt) return; // not the instance context
const { dependencies } = reactive_stmt;
let serialized_body = /** @type {import('estree').Statement} */ (context.visit(node.body));
if (serialized_body.type !== 'BlockStatement') {
serialized_body = b.block([serialized_body]);
}
const body = serialized_body.body;
/** @type {import('estree').Expression[]} */
const sequence = [];
for (const binding of dependencies) {
if (binding.kind === 'normal') continue;
const name = binding.node.name;
let serialized = serialize_get_binding(b.id(name), state);
// If the binding is a prop, we need to deep read it because it could be fine-grained $state
// from a runes-component, where mutations don't trigger an update on the prop as a whole.
if (name === '$$props' || name === '$$restProps' || binding.kind === 'bindable_prop') {
serialized = b.call('$.deep_read_state', serialized);
}
sequence.push(serialized);
}
// these statements will be topologically ordered later
state.legacy_reactive_statements.set(
node,
b.stmt(
b.call(
'$.legacy_pre_effect',
sequence.length > 0 ? b.thunk(b.sequence(sequence)) : b.thunk(b.block([])),
b.thunk(b.block(body))
)
)
);
return b.empty;
},
BreakStatement(node, context) {
if (!node.label || node.label.name !== '$') return;
const in_reactive_statement =
context.path[1].type === 'LabeledStatement' && context.path[1].label.name === '$';
if (in_reactive_statement) {
return b.return();
}
}
};
|