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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 3542x 3542x 3542x 3542x 949x 950x 950x 950x 270x 270x 270x 680x 949x 136x 136x 136x 66x 66x 34x 66x 30x 30x 30x 30x 30x 66x 136x 136x 136x 136x 136x 136x 544x 544x 544x 950x 950x 950x 12x 12x 12x 12x 12x 532x 923x 524x 524x 524x 8x 906x 6x 6x 6x 6x 6x 2x 2x 2x 3542x 2593x 2933x 2933x 2933x 2933x 2933x 528x 528x 528x 2405x 2933x 2055x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 31x 31x 31x 31x 31x 31x 5x 5x 2050x 2050x 2050x 2050x 2055x 2055x 2055x 2055x 2055x 2055x 2055x 990x 990x 990x 2050x 2050x 2050x 2050x 2050x 350x 350x 350x 350x 350x 2933x 2933x 2933x 2933x 2593x 3542x 3542x 3542x 3542x 3542x 3542x 2x 2x 2x 2x 2x 2x 2x 352x 352x 348x 348x 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); }) ]; } |