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 45945x 45945x 45945x 45945x 9694x 9694x 36251x 36251x 36251x 36251x 36251x 45945x 3x 45945x 1x 1x 36250x 36250x 45945x 13x 13x 36250x 45945x 11298x 11298x 11298x 1833x 11298x 1781x 1781x 1781x 1781x 1781x 132x 132x 132x 132x 132x 132x 132x 2x 1x 1x 1x 2x     1x 2x     1x 1x 1x 132x 1779x 1781x 2x 2x 1781x 11298x 36246x 36246x 36246x 45867x 24952x 68x 68x 24952x 24952x 59x 59x 24952x 36246x 45945x 33117x 10362x 10362x 10362x 33117x 33117x 33117x 33117x 33117x 654x 654x 654x 58x 39x 39x 39x 654x 654x 33117x 44x 33117x 31x 33117x 26x 26x 33117x 33117x 33117x 33117x 34x 33117x 3x 3x 33117x 45945x  
/** @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);
		}
	}
}