Function forEachMapping

packages/metro-source-map/src/generateFunctionMap.js:213–228

* Traverses a Babel AST and calls the supplied callback with function name * mappings, one at a time.

(
  ast: BabelNode,
  context: ?Context,
  pushMapping: RangeMapping => void,
)

 * mappings, one at a time.
 */
function forEachMapping(
  ast: BabelNode,
  context: ?Context,
  pushMapping: RangeMapping => void,
) {
  const visitor = getFunctionMapVisitor(context, pushMapping);

  traverse(ast, {
    // Our visitor doesn't care about scope
    noScope: true,

    Function: visitor,
    Program: visitor,
    Class: visitor,
  });
}

const ANONYMOUS_NAME = '<anonymous>';