Function preprocess

lib/linter/code-path-analysis/code-path-analyzer.js:258–382

* Updates the code path due to the position of a given node in the parent node * thereof. * * For example, if the node is `parent.consequent`, this creates a fork from the * current path. * @param {CodePathAnalyzer} analyzer The instance. * @param {ASTNode} node The current AST node. * @retur

(analyzer, node)

 * @returns {void}
 */
function preprocess(analyzer, node) {
	const codePath = analyzer.codePath;
	const state = CodePath.getState(codePath);
	const parent = node.parent;

	switch (parent.type) {
		// The `arguments.length == 0` case is in `postprocess` function.
		case "CallExpression":
			if (
				parent.optional === true &&
				parent.arguments.length >= 1 &&
				parent.arguments[0] === node
			) {
				state.makeOptionalRight();
			}
			break;
		case "MemberExpression":
			if (parent.optional === true && parent.property === node) {
				state.makeOptionalRight();
			}
			break;

		case "LogicalExpression":
			if (
				parent.right === node &&
				isHandledLogicalOperator(parent.operator)
			) {
				state.makeLogicalRight();
			}
			break;

		case "AssignmentExpression":
			if (
				parent.right === node &&
				isLogicalAssignmentOperator(parent.operator)
			) {
				state.makeLogicalRight();
			}
			break;

		case "ConditionalExpression":
		case "IfStatement":
			/*
			 * Fork if this node is at `consequent`/`alternate`.
			 * `popForkContext()` exists at `IfStatement:exit` and
			 * `ConditionalExpression:exit`.
			 */
			if (parent.consequent === node) {
				state.makeIfConsequent();
			} else if (parent.alternate === node) {
				state.makeIfAlternate();
			}
			break;

		case "SwitchCase":
			if (parent.consequent[0] === node) {
				state.makeSwitchCaseBody(false, !parent.test);
			}