AScript动态脚本多语言环境支持

1 public interface ITokenHandler
2 {
3     /// <summary>
4     /// token处理
5     /// </summary>
6     /// <param name="analyzer">语法分析器</param>
7     /// <param name="e">当前token、语法树及上下文信息</param>
8     void Build(DefaultSyntaxAnalyzer analyzer, TokenAnalyzingArgs e);
9 }

 1 /// <summary>
 2 /// <![CDATA[age>20 and age<50]]>
 3 /// </summary>
 4 public class AndTokenHandler : ITokenHandler
 5 {
 6     public static readonly AndTokenHandler Instance = new AndTokenHandler();
 7 
 8     public void Build(DefaultSyntaxAnalyzer analyzer, TokenAnalyzingArgs e)
 9     {
10         e.IsHandled = true;
11         if (!e.Ignore)
12         {
13             var op = new OperatorNode("and", DefaultSyntaxAnalyzer.OperatorPriorities["&&"], 2);
14             e.TreeBuilder.AddOperator(e.BuildContext, e.ScriptContext, e.Options, e.Control, op);
15         }
16     }
17 }

 1 public class SqlLang : ScriptLang
 2 {
 3     public static readonly SqlLang Instance = new SqlLang();
 4 
 5     public SqlLang()
 6     {
 7         this.Compatible = false;
 8 
 9         AddFunc(".", DotOperator.Instance);
10         AddFunc("!", BoolNotOperator.Instance);
11         AddFunc("<", LessThanOperator.Instance);
12         AddFunc(">", GreaterThanOperator.Instance);
13         AddFunc("=", EqualOperator.Instance);
14         AddFunc(">=", GreaterThanOrEqualOperator.Instance);
15         AddFunc("<=", LessThanOrEqualOperator.Instance);
16         AddFunc("!=", NotEqualOperator.Instance);
17         AddFunc("and", AndAlsoOperator.Instance);
18         AddFunc("or", OrElseOperator.Instance);
19 
20         AddTokenHandler("and", AndTokenHandler.Instance);
21         AddTokenHandler("AND", AndTokenHandler.Instance);
22         AddTokenHandler("or", OrTokenHandler.Instance);
23         AddTokenHandler("OR", OrTokenHandler.Instance);
24         AddTokenHandler("=", EqualTokenHandler.Instance);
25         AddTokenHandler("like", LikeTokenHandler.Instance);
26         AddTokenHandler("LIKE", LikeTokenHandler.Instance);
27     }
28 }

 1 string s = "p.Name like 'to%' or p.Age>20 and p.Age<50";
 2 var script = new Script();
 3 script.Context.Langs = new[] { "sql" };
 4 var matchFunc = script.Compile<Person, bool>(s, "p");
 5 var list = new List<Person>
 6 {
 7     new Person("jim", 18),
 8     new Person("tony", 60),
 9     new Person("tom", 19),
10     new Person("san", 25),
11     new Person("lin", 70)
12 };
13 var matchedList = list.Where(matchFunc).ToList();
14 Assert.AreEqual(3, matchedList.Count);
15 Assert.AreEqual("tony", matchedList[0].Name);
16 Assert.AreEqual("tom", matchedList[1].Name);
17 Assert.AreEqual("san", matchedList[2].Name);

 1 string s = @"
 2 bool isMatch(Person p) {
 3     #lang sql
 4     p.Age>20 and p.Age<50 or p.Name like 'to%' or p.Name='pen';
 5     #end
 6 }
 7 var matchedList = new List<Person>();
 8 foreach(var item in list) {
 9 if (isMatch(item)) matchedList.Add(item);
10 }
11 matchedList;
12 ";
13 var list = new List<Person>
14 {
15     new Person("jim", 18),
16     new Person("tony", 60),
17     new Person("tom", 19),
18     new Person("san", 25)
19 };
20 var script = new Script();
21 script.Context.AddType<Person>();
22 script.Context.SetVar("list", list);
23 var matchedList = script.Eval<List<Person>>(s);
24 Assert.AreEqual(3, matchedList.Count);
25 Assert.AreEqual("tony", matchedList[0].Name);
26 Assert.AreEqual("tom", matchedList[1].Name);
27 Assert.AreEqual("san", matchedList[2].Name);