Function pushProvider

packages/react-server/src/ReactFizzNewContext.js:180–228

(
  context: ReactContext<T>,
  nextValue: T,
)

}

export function pushProvider<T>(
  context: ReactContext<T>,
  nextValue: T,
): ContextSnapshot {
  let prevValue;
  if (isPrimaryRenderer) {
    prevValue = context._currentValue;
    context._currentValue = nextValue;
    if (__DEV__) {
      if (
        context._currentRenderer !== undefined &&
        context._currentRenderer !== null &&
        context._currentRenderer !== rendererSigil
      ) {
        console.error(
          'Detected multiple renderers concurrently rendering the ' +
            'same context provider. This is currently unsupported.',
        );
      }
      context._currentRenderer = rendererSigil;
    }
  } else {
    prevValue = context._currentValue2;
    context._currentValue2 = nextValue;
    if (__DEV__) {
      if (
        context._currentRenderer2 !== undefined &&
        context._currentRenderer2 !== null &&
        context._currentRenderer2 !== rendererSigil
      ) {
        console.error(
          'Detected multiple renderers concurrently rendering the ' +
            'same context provider. This is currently unsupported.',
        );
      }
      context._currentRenderer2 = rendererSigil;
    }
  }
  const prevNode = currentActiveSnapshot;
  const newNode: ContextNode<T> = {
    parent: prevNode,
    depth: prevNode === null ? 0 : prevNode.depth + 1,
    context: context,
    parentValue: prevValue,
    value: nextValue,
  };
  currentActiveSnapshot = newNode;
  return newNode;
}

export function popProvider<T>(context: ReactContext<T>): ContextSnapshot {
  const prevSnapshot = currentActiveSnapshot;