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 46994x 46994x 46994x 46994x 9914x 9914x 37080x 37080x 37080x 37080x 37080x 46994x 3x 46994x 1x 1x 37079x 37079x 46994x 25x 25x 37079x 46994x 11578x 11578x 11578x 1858x 11578x 1806x 1806x 1806x 1806x 1806x 132x 132x 132x 132x 132x 132x 132x 2x 1x 1x 1x 2x     1x 2x     1x 1x 1x 132x 1804x 1806x 2x 2x 1806x 11578x 37075x 37075x 37075x 46848x 25501x 71x 71x 25501x 25501x 63x 63x 25501x 37075x 46994x 33810x 10525x 10525x 10525x 33810x 33810x 33810x 33810x 33810x 672x 672x 672x 60x 41x 41x 41x 672x 672x 33810x 44x 33810x 31x 33810x 26x 26x 33810x 33810x 33810x 33810x 34x 33810x 3x 3x 33810x 46994x  
/** @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);
		}
	}
}