All files / src/compiler/phases/2-analyze/visitors Identifier.js

96.94% Statements 127/131
93.47% Branches 43/46
100% Functions 1/1
96.8% Lines 121/125

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 1262x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 47268x 47268x 47268x 47268x 9976x 9976x 37292x 37292x 37292x 37292x 37292x 47268x 3x 47268x 1x 1x 37291x 37291x 47268x 25x 25x 37291x 47268x 11752x 11752x 11752x 1888x 11752x 1836x 1836x 1836x 1836x 1836x 134x 134x 134x 134x 134x 134x 134x 2x 1x 1x 1x 2x     1x 2x     1x 1x 1x 134x 1834x 1836x 2x 2x 1836x 11752x 37287x 37287x 37287x 47104x 25539x 71x 71x 25539x 25539x 63x 63x 25539x 37287x 47268x 33976x 10553x 10553x 10553x 33976x 33976x 33976x 33976x 33976x 692x 692x 692x 60x 41x 41x 41x 692x 692x 33976x 44x 33976x 31x 33976x 26x 26x 33976x 33976x 33976x 33976x 34x 33976x 3x 3x 33976x 47268x  
/** @import { Expression, Identifier } from 'estree' */
/** @import { EachBlock } from '#compiler' */
/** @import { Context } from '../types' */
import is_reference from 'is-reference';
import { should_proxy } from '../../3-transform/client/utils.js';
import * as e from '../../../errors.js';
import * as w from '../../../warnings.js';
import { is_rune } from '../../../../utils.js';
import { mark_subtree_dynamic } from './shared/fragment.js';
 
/**
 * @param {Identifier} node
 * @param {Context} context
 */
export function Identifier(node, context) {
	let i = context.path.length;
	let parent = /** @type {Expression} */ (context.path[--i]);
 
	if (!is_reference(node, parent)) {
		return;
	}
 
	mark_subtree_dynamic(context.path);
 
	// If we are using arguments outside of a function, then throw an error
	if (
		node.name === 'arguments' &&
		!context.path.some((n) => n.type === 'FunctionDeclaration' || n.type === 'FunctionExpression')
	) {
		e.invalid_arguments_usage(node);
	}
 
	// `$$slots` exists even in runes mode
	if (node.name === '$$slots') {
		context.state.analysis.uses_slots = true;
	}
 
	if (context.state.analysis.runes) {
		if (
			is_rune(node.name) &&
			context.state.scope.get(node.name) === null &&
			context.state.scope.get(node.name.slice(1)) === null
		) {
			/** @type {Expression} */
			let current = node;
			let name = node.name;
 
			while (parent.type === 'MemberExpression') {
				if (parent.computed) e.rune_invalid_computed_property(parent);
				name += `.${/** @type {Identifier} */ (parent.property).name}`;
 
				current = parent;
				parent = /** @type {Expression} */ (context.path[--i]);
 
				if (!is_rune(name)) {
					if (name === '$effect.active') {
						e.rune_renamed(parent, '$effect.active', '$effect.tracking');
					}
 
					if (name === '$state.frozen') {
						e.rune_renamed(parent, '$state.frozen', '$state.raw');
					}
 
					if (name === '$state.is') {
						e.rune_removed(parent, '$state.is');
					}
 
					e.rune_invalid_name(parent, name);
				}
			}
 
			if (parent.type !== 'CallExpression') {
				e.rune_missing_parentheses(current);
			}
		}
	}
 
	let binding = context.state.scope.get(node.name);
 
	if (!context.state.analysis.runes) {
		if (node.name === '$$props') {
			context.state.analysis.uses_props = true;
		}
 
		if (node.name === '$$restProps') {
			context.state.analysis.uses_rest_props = true;
		}
	}
 
	if (binding) {
		if (context.state.expression) {
			context.state.expression.dependencies.add(binding);
			context.state.expression.has_state ||= binding.kind !== 'normal';
		}
 
		if (
			context.state.analysis.runes &&
			node !== binding.node &&
			context.state.function_depth === binding.scope.function_depth &&
			// If we have $state that can be proxied or frozen and isn't re-assigned, then that means
			// it's likely not using a primitive value and thus this warning isn't that helpful.
			((binding.kind === 'state' &&
				(binding.reassigned ||
					(binding.initial?.type === 'CallExpression' &&
						binding.initial.arguments.length === 1 &&
						binding.initial.arguments[0].type !== 'SpreadElement' &&
						!should_proxy(binding.initial.arguments[0], context.state.scope)))) ||
				binding.kind === 'raw_state' ||
				binding.kind === 'derived') &&
			// We're only concerned with reads here
			(parent.type !== 'AssignmentExpression' || parent.left !== node) &&
			parent.type !== 'UpdateExpression'
		) {
			w.state_referenced_locally(node);
		}
 
		if (
			context.state.reactive_statement &&
			binding.scope === context.state.analysis.module.scope &&
			binding.reassigned
		) {
			w.reactive_declaration_module_script_dependency(node);
		}
	}
}