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 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 3475x 3475x 3475x 3475x 883x 884x 884x 884x 250x 250x 250x 634x 883x 126x 126x 126x 62x 62x 31x 62x 27x 27x 27x 27x 27x 62x 126x 126x 126x 126x 126x 126x 508x 508x 508x 884x 884x 884x 8x 8x 8x 8x 8x 500x 865x 492x 492x 492x 8x 852x 6x 6x 6x 6x 6x 2x 2x 2x 3475x 2592x 2932x 2932x 2932x 2932x 2932x 531x 531x 531x 2401x 2928x 2053x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 31x 31x 31x 31x 31x 31x 5x 5x 2048x 2048x 2048x 2048x 2053x 2053x 2053x 2053x 2053x 2053x 2053x 990x 990x 990x 2048x 2048x 2048x 2048x 2048x 348x 348x 348x 348x 348x 2932x 2932x 2932x 2932x 2592x 3475x 3475x 3475x 3475x 3475x 3475x 2x 2x 2x 2x 2x 2x 2x 350x 350x 346x 346x 4x 4x 4x 4x 4x 4x 10x 10x 4x 4x 4x | /** @import { VariableDeclaration, VariableDeclarator, Expression, CallExpression, Pattern, Identifier } from 'estree' */
/** @import { Binding } from '#compiler' */
/** @import { Context } from '../types.js' */
/** @import { Scope } from '../../../scope.js' */
import { build_fallback, extract_paths } from '../../../../utils/ast.js';
import * as b from '../../../../utils/builders.js';
import { get_rune } from '../../../scope.js';
import { walk } from 'zimmerframe';
/**
* @param {VariableDeclaration} node
* @param {Context} context
*/
export function VariableDeclaration(node, context) {
/** @type {VariableDeclarator[]} */
const declarations = [];
if (context.state.analysis.runes) {
for (const declarator of node.declarations) {
const init = declarator.init;
const rune = get_rune(init, context.state.scope);
if (!rune || rune === '$effect.tracking' || rune === '$inspect' || rune === '$effect.root') {
declarations.push(/** @type {VariableDeclarator} */ (context.visit(declarator)));
continue;
}
if (rune === '$props') {
// remove $bindable() from props declaration
const id = walk(declarator.id, null, {
AssignmentPattern(node) {
if (
node.right.type === 'CallExpression' &&
get_rune(node.right, context.state.scope) === '$bindable'
) {
const right = node.right.arguments.length
? /** @type {Expression} */ (context.visit(node.right.arguments[0]))
: b.id('undefined');
return b.assignment_pattern(node.left, right);
}
}
});
declarations.push(
b.declarator(/** @type {Pattern} */ (context.visit(id)), b.id('$$props'))
);
continue;
}
const args = /** @type {CallExpression} */ (init).arguments;
const value =
args.length === 0 ? b.id('undefined') : /** @type {Expression} */ (context.visit(args[0]));
if (rune === '$derived.by') {
declarations.push(
b.declarator(/** @type {Pattern} */ (context.visit(declarator.id)), b.call(value))
);
continue;
}
if (declarator.id.type === 'Identifier') {
declarations.push(b.declarator(declarator.id, value));
continue;
}
if (rune === '$derived') {
declarations.push(
b.declarator(/** @type {Pattern} */ (context.visit(declarator.id)), value)
);
continue;
}
declarations.push(...create_state_declarators(declarator, context.state.scope, value));
}
} else {
for (const declarator of node.declarations) {
const bindings = /** @type {Binding[]} */ (context.state.scope.get_bindings(declarator));
const has_state = bindings.some((binding) => binding.kind === 'state');
const has_props = bindings.some((binding) => binding.kind === 'bindable_prop');
if (!has_state && !has_props) {
declarations.push(/** @type {VariableDeclarator} */ (context.visit(declarator)));
continue;
}
if (has_props) {
if (declarator.id.type !== 'Identifier') {
// Turn export let into props. It's really really weird because export let { x: foo, z: [bar]} = ..
// means that foo and bar are the props (i.e. the leafs are the prop names), not x and z.
const tmp = context.state.scope.generate('tmp');
const paths = extract_paths(declarator.id);
declarations.push(
b.declarator(
b.id(tmp),
/** @type {Expression} */ (context.visit(/** @type {Expression} */ (declarator.init)))
)
);
for (const path of paths) {
const value = path.expression?.(b.id(tmp));
const name = /** @type {Identifier} */ (path.node).name;
const binding = /** @type {Binding} */ (context.state.scope.get(name));
const prop = b.member(b.id('$$props'), b.literal(binding.prop_alias ?? name), true);
declarations.push(b.declarator(path.node, build_fallback(prop, value)));
}
continue;
}
const binding = /** @type {Binding} */ (context.state.scope.get(declarator.id.name));
const prop = b.member(
b.id('$$props'),
b.literal(binding.prop_alias ?? declarator.id.name),
true
);
/** @type {Expression} */
let init = prop;
if (declarator.init) {
const default_value = /** @type {Expression} */ (context.visit(declarator.init));
init = build_fallback(prop, default_value);
}
declarations.push(b.declarator(declarator.id, init));
continue;
}
declarations.push(
...create_state_declarators(
declarator,
context.state.scope,
/** @type {Expression} */ (declarator.init && context.visit(declarator.init))
)
);
}
}
return {
...node,
declarations
};
}
/**
* @param {VariableDeclarator} declarator
* @param {Scope} scope
* @param {Expression} value
* @returns {VariableDeclarator[]}
*/
function create_state_declarators(declarator, scope, value) {
if (declarator.id.type === 'Identifier') {
return [b.declarator(declarator.id, value)];
}
const tmp = scope.generate('tmp');
const paths = extract_paths(declarator.id);
return [
b.declarator(b.id(tmp), value), // TODO inject declarator for opts, so we can use it below
...paths.map((path) => {
const value = path.expression?.(b.id(tmp));
return b.declarator(path.node, value);
})
];
}
|