public void Run(Ast.Ast ast)
{
if (ast is Exp)
{
var result = runExp((Ast.Exp)ast);
Console.WriteLine(result);
}
else
{
runBlock(((Ast.Program)ast).Statements);
}
}
/// <summary>
/// ASTから、文字列表現に変換する.
///
/// prettyPrintにtrueを指定すると、改行やインデントを挟んだ読みやすい表現になる
///
/// BuildString(1 + 2 * 3 の AST, false) => "Add( 1 Multiply( 2 3 ) )"
///
/// BuildString(1 + 2 * 3 の AST, true) =>
/// "Add(
/// 1
/// Multiply(
/// 2
/// 3
/// )
/// )"
/// </summary>
/// <param name="ast">対象のAST</param>
/// <param name="prettyPrint">Pretty print をするかどうか</param>
/// <returns></returns>
public string BuildString(Ast.Ast ast, bool prettyPrint = true)
{
list_ = new List <Tuple <int, string> >();
build(0, ast);
if (prettyPrint)
{
return(string.Join("\n", list_.Select(s => new string(' ', s.Item1 * 2) + s.Item2).ToArray()));
}
else
{
return(string.Join(" ", list_.Select(s => s.Item2).ToArray()));
}
}
void build(int level, Ast.Ast ast)
{
var displayInfo = ast.GetDisplayInfo();
if (displayInfo.Item2 == null)
{
add(level, displayInfo.Item1);
}
else
{
add(level, displayInfo.Item1 + "(");
foreach (var child in displayInfo.Item2)
{
build(level + 1, child);
}
add(level, ")");
}
}
