void ExpandBlock(AstStatement::Ptr node, AstStatement::List& stats, bool lastStatement)
{
AstStatement_ExpandBlock visitor(stats, lastStatement);
node->Accept(&visitor);
}
void PrintStatement(AstStatement::Ptr statement, AstDeclaration* scope, CSharpNameResolver& resolver, ostream& o, string prefix, bool block)
{
CSharpStatementCodegen codegen(resolver, o, prefix, block, scope);
statement->Accept(&codegen);
}