Function parseR3

packages/compiler/test/render3/view/util.ts:146–193

(
  input: string,
  options: {
    preserveWhitespaces?: boolean;
    leadingTriviaChars?: string[];
    ignoreError?: boolean;
    selectorlessEnabled?: boolean;
  } = {},
)

// Parse an html string to IVY specific info
export function parseR3(
  input: string,
  options: {
    preserveWhitespaces?: boolean;
    leadingTriviaChars?: string[];
    ignoreError?: boolean;
    selectorlessEnabled?: boolean;
  } = {},
): Render3ParseResult {
  const htmlParser = new HtmlParser();
  const parseResult = htmlParser.parse(input, 'path:://to/template', {
    tokenizeExpansionForms: true,
    leadingTriviaChars: options.leadingTriviaChars ?? LEADING_TRIVIA_CHARS,
    selectorlessEnabled: options.selectorlessEnabled,
  });

  if (parseResult.errors.length > 0 && !options.ignoreError) {
    const msg = parseResult.errors.map((e) => e.toString()).join('\n');
    throw new Error(msg);
  }

  let htmlNodes = processI18nMeta(parseResult).rootNodes;

  if (!options.preserveWhitespaces) {
    htmlNodes = visitAllWithSiblings(
      new WhitespaceVisitor(true /* preserveSignificantWhitespace */),
      htmlNodes,
    );
  }

  const expressionParser = new Parser(new Lexer());
  const schemaRegistry = new MockSchemaRegistry(
    {'invalidProp': false},
    {'mappedAttr': 'mappedProp'},
    {'unknown': false, 'un-known': false},
    ['onEvent'],
    ['onEvent'],
  );
  const bindingParser = new BindingParser(expressionParser, schemaRegistry, []);
  const r3Result = htmlAstToRender3Ast(htmlNodes, bindingParser, {collectCommentNodes: false});

  if (r3Result.errors.length > 0 && !options.ignoreError) {
    const msg = r3Result.errors.map((e) => e.toString()).join('\n');
    throw new Error(msg);
  }

  return r3Result;
}

export function processI18nMeta(htmlAstWithErrors: ParseTreeResult): ParseTreeResult {
  return new ParseTreeResult(