define method

Implementation

void define(String name, Object? value, {String? sourceUri}) {
  if (_values.containsKey(name) ||
      _bridgedClasses.containsKey(name) ||
      _bridgedEnums.containsKey(name)) {
    // SCE25: a top-level function or variable bridged by TWO packages under
    // one name used to take this branch, log a warning nobody reads in a
    // normal run, and silently bind the bare name to whichever registered
    // last. The class path has rejected that arbitrary pick since tcca19;
    // this is the same rule on the namespace that lacked it.
    //
    // Only a cross-package collision qualifies. A script redefining its own
    // variable, or an embedder re-registering without a source URI, keeps the
    // legacy overwrite — an error whose remedy does not exist is worse than
    // the pick it replaces, which is the rule [_markAmbiguousBridgeName]
    // already applies for classes.
    final prior = _values[name];
    if (sourceUri != null && _values.containsKey(name)) {
      if (_markAmbiguousBridgeName(name, prior, value, sourceUri)) return;
    } else {
      Logger.warn(
        "Redefining variable or colliding with bridged type: $name",
      );
    }
  }
  if (sourceUri != null) _bridgeSourceUrisOrNew[name] = sourceUri;
  _values[name] = value;
}