export function parameterTypeToString()

in build-scripts/doc-gen/util.ts [344:376]

• 21 lines of code
• 5 McCabe index (conditional complexity)

export function parameterTypeToString(
    checker: ts.TypeChecker, symbol: ts.Symbol,
    identifierGenericMap: {[identifier: string]: string}): string {
  // Look for type nodes that aren't null and get the full text of the type
  // node, falling back to using the checker to serialize the type.
  let typeStr;

  const valueDeclaration = symbol.valueDeclaration;

  if (valueDeclaration == null) {
    // See bug https://github.com/microsoft/TypeScript/issues/24706
    // value declaration is not optional but is sometimes undefined.

    // Fall back to using the checkers method for converting the type to a
    // string.
    typeStr = checker.typeToString(
        checker.getTypeOfSymbolAtLocation(symbol, valueDeclaration));
  } else {
    valueDeclaration.forEachChild(child => {
      if (ts.isTypeNode(child) && child.kind !== ts.SyntaxKind.NullKeyword) {
        typeStr = child.getText();
      }
    });
    if (typeStr == null) {
      // Fall back to using the checkers method for converting the type to a
      // string.
      typeStr = checker.typeToString(
          checker.getTypeOfSymbolAtLocation(symbol, valueDeclaration));
    }
  }

  return sanitizeTypeString(typeStr, identifierGenericMap);
}