export function parse()

in src/esprima.ts [30:80]

• 45 lines of code
• 19 McCabe index (conditional complexity)

export function parse(code: string, options, delegate) {
    let commentHandler: CommentHandler | null = null;
    const proxyDelegate = (node, metadata) => {
        if (delegate) {
            delegate(node, metadata);
        }
        if (commentHandler) {
            commentHandler.visit(node, metadata);
        }
    };

    let parserDelegate = (typeof delegate === 'function') ? proxyDelegate : null;
    let collectComment = false;
    if (options) {
        collectComment = (typeof options.comment === 'boolean' && options.comment);
        const attachComment = (typeof options.attachComment === 'boolean' && options.attachComment);
        if (collectComment || attachComment) {
            commentHandler = new CommentHandler();
            commentHandler.attach = attachComment;
            options.comment = true;
            parserDelegate = proxyDelegate;
        }
    }

    let isModule = false;
    if (options && typeof options.sourceType === 'string') {
        isModule = (options.sourceType === 'module');
    }

    let parser: Parser;
    if (options && typeof options.jsx === 'boolean' && options.jsx) {
        parser = new JSXParser(code, options, parserDelegate);
    } else {
        parser = new Parser(code, options, parserDelegate);
    }

    const program = isModule ? parser.parseModule() : parser.parseScript();
    const ast = program as any;

    if (collectComment && commentHandler) {
        ast.comments = commentHandler.comments;
    }
    if (parser.config.tokens) {
        ast.tokens = parser.tokens;
    }
    if (parser.config.tolerant) {
        ast.errors = parser.errorHandler.errors;
    }

    return ast;
}