executeBlock method

Object? executeBlock(List<SAstNode> statements, Environment blockEnvironment)

Implementation

Object? executeBlock(
  List<SAstNode> statements,
  Environment blockEnvironment,
) {
  final previousEnvironment = environment;
  Object? lastValue;
  try {
    environment = blockEnvironment;
    for (final statement in statements) {
      // Explicitly handle declarations within blocks
      if (statement is SFunctionDeclaration ||
          statement is SClassDeclaration ||
          statement is SMixinDeclaration ||
          statement
              is STopLevelVariableDeclaration || // Technically not a statement, but might appear?
          statement is SVariableDeclarationStatement) {
        // This is a proper statement
        lastValue = statement.accept<Object?>(this);
        // Check for suspension after declaration execution
        if (lastValue is AsyncSuspensionRequest) {
          return lastValue; // Propagate suspension
        }
        lastValue = null; // Declarations don't produce a carry value
      } else {
        lastValue = statement.accept<Object?>(this);
        // if the execution of the statement returns an async suspension request,
        // we propagate it immediately upwards.
        if (lastValue is AsyncSuspensionRequest) {
          return lastValue;
        }
      }
      // Handle ReturnException, BreakException, ContinueException if needed (propagate or consume)
      // This simple version just propagates them implicitly by not catching them here.
    }
  } finally {
    environment = previousEnvironment;
  }
  return lastValue;
}