private static void TestLexer()
{
SimpleLexer lexer = new SimpleLexer();
string script = "int age = 45;";
SimpleTokenReader tokenReader = lexer.Tokenize(script);
Dump(tokenReader);
script = "inta age = 45;";
tokenReader = lexer.Tokenize(script);
Dump(tokenReader);
Console.ReadKey();
}
public static void TextCalculator()
{
SimpleCalculator calculator = new SimpleCalculator();
string script = "int a = b+3";
Console.WriteLine("解析变量声明语句：" + script);
SimpleLexer lexer = new SimpleLexer();
TokenReader tokens = lexer.Tokenize(script);
try
{
SimpleASTNode node = calculator.InitDeclare(tokens);
calculator.DumpAST(node, "");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
// script = "2 + 3*5";
//Console.WriteLine("\n计算：" + script + ",看上去一切正常");
script = "2 + 3 + 4";
calculator.Evaluate(script);
}
/// <summary>
/// 解析脚本，并返回根节点
/// </summary>
/// <param name="code"></param>
/// <returns></returns>
public ASTNode parse(string code)
{
SimpleLexer lexer = new SimpleLexer();
TokenReader tokens = lexer.Tokenize(code);
ASTNode rootNode = Prog(tokens);
return(rootNode);
}