Tea 与 C# 的不同点

C# 代码	等效的 Tea 代码	不同的原因
using 名字空间;	import 包;	叫法不同
namespace A{}	module A; // 一个文件只能用一次
extern alias s; s::System.IO.File;	import module as s; s.File
internal	（无）
A a = new A(1) {p = 4, t = 2};	A a = new A(1)..p = 4..t = 2;
foreach(int item in arr){ } </td> <td> for(int item in arr){ } </td> <td></td> </tr> <tr> <td> switch { case 1: case 2: {break;} default: {break;} } </td> <td> switch { case 1, 2: {} case else: {} } </td> <td></td> </tr> <tr> <td> using(A a = new A()){} </td> <td> with(A a = new A()) {} </td> <td></td> </tr> <tr> <td> fixed(int* p = &r){ } </td> <td> with(int* p = &r){ } </td> <td></td> </tr> <tr> <td> var a = fn(); dynamic b = 4; </td> <td> var a = fn(); object b = 4; </td> <td></td> </tr> <tr> <td> int? a = null; int? b = a ?? 4; </td> <td> （无） </td> <td></td> </tr> <tr> <td> int[] a = {1, 2, 3}; var list = new List<int>{1, 2, 3}; </td> <td> int[] a = [1, 2, 3]; var list = [1, 2, 3] as List<int>; </td> <td></td> </tr> <tr> <td> var fn = (e) => { return e + e }; </td> <td> var fn = (e) -> { return e + e }; </td> <td></td> </tr> <tr> <td> class QAttribute : Attribute {} class A { [q] int aa; } </td> <td> lass QAnnotation : Annotation {} class A { @q int aa; } </td> <td></td> </tr> <tr> <td> static class AExtensions { void fn(this A a); } </td> <td> extend A { void fn(); } </td> <td></td> </tr> <tr> <td> class A{ public static A operator +(A a, A b) {} public static explicit operator B(A a) {} } </td> <td> class A{ A this +(A b) {} as B() {} } </td> <td></td> </tr>