adopt to iexpr.core 0.5.3

Author: StardustDL

ExprSharp.Repl/Program.cs

@@ -1,5 +1,6 @@
 using CommandLine;
 using ExprSharp.Runtime;
+using iExpr;
 using System;
 using System.IO;
 
@@ -135,7 +136,8 @@ static object run(string code)
         {
             try
             {
-                return runtime.Execute(code);
+                var x = runtime.Execute(code);
+                return x;
             }
             catch (Exception ex)
             {
@@ -154,7 +156,8 @@ static void Work_Loaded(string cmd)
                         if (File.Exists(path))
                         {
                             var v = run(File.ReadAllText(path));
-                            if (v != null) Console.WriteLine(v.ToString());
+                            var ou = v?.ToString();
+                            if (!String.IsNullOrEmpty(ou)) Console.WriteLine(ou);
                         }
                         else
                         {
@@ -188,7 +191,8 @@ static void Work_Loaded(string cmd)
                     WithNotParsed(errs =>
                     {
                         var v = run(cmd);
-                        if (v != null) Console.WriteLine(v.ToString());
+                        var ou = v?.ToString();
+                        if (!String.IsNullOrEmpty(ou)) Console.WriteLine(ou);
                     });
         }
     }

ExprSharp.Repl/Properties/launchSettings.json

@@ -1,7 +1,8 @@
 {
   "profiles": {
     "ExprSharp.Repl": {
-      "commandName": "Project"
+      "commandName": "Project",
+      "workingDirectory": "G:\\设计\\design\\ExprSharp\\test"
     }
   }
 }

README.md

@@ -3,17 +3,17 @@
 </div>
 
 ![](https://img.shields.io/badge/framework-.netcore2.0-blue.svg)
-![](https://img.shields.io/badge/iexpr.core-v0.5.2-brightgreen.svg)
-![](http://progressed.io/bar/40?title=done)
-
-[x]: ![](https://img.shields.io/badge/build-passing-brightgreen.svg)
-[x]: ![](https://img.shields.io/badge/release-v0.5.2-blue.svg)
-[x]: [![](https://img.shields.io/badge/nuget-v0.5.2.2-brightgreen.svg)](https://www.nuget.org/packages/iExpr.Core/0.5.2.2)
+![](https://img.shields.io/badge/iexpr.core-v0.5.6-brightgreen.svg)
+![](http://progressed.io/bar/50?title=done)
 
 + Author: Stardust D.L.
 + Version: 0.1
 
-The REPL environment for ExprSharp. 
+The REPL environment for ExprSharp *(need ExprSharp.Core)*.
+
+> ExprSharp: A tiny code language based on [iExpr.Core](https://github.com/iExpr/iExpr.Core).
+
+> For more information about ExprSharp, please see [**Wiki**](https://github.com/ExprSharp/ExprSharp.Core/wiki)
 
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