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holdom
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A very simple solution:
- Download the ScriptCs.Engine.Roslyn NuGet package and it to MyExtensions.
- Add the namespaces
Then add this class to MyExtensions:
public class CSrepl {
private ScriptEngine sengine;
private Session session;
private string cmd;
private string cmd_right = "";
public CSrepl() {
// Start the ScriptEngine and create a new session
sengine = new Roslyn.Scripting.CSharp.ScriptEngine();
session = sengine.CreateSession();
// Basic operations within the session
session.Execute(@"using System;");
session.Execute(@"double ans = 0.0;");
greetingMessage();
startRepl();
}
private void startRepl()
{
while(!string.IsNullOrEmpty(cmd = Console.ReadLine()))
{
// Dump the entered expreassion
cmd.Dump();
if(cmd.Contains("="))
{
// Get the right hand part of the expresssion after the = sign
cmd_right = cmd.Split('=')[1];
// Add the semicolon at the end of the expression if it is missing
if(!cmd.EndsWith(";"))
{
cmd = cmd + ";";
}
}
try
{
if(session.Execute(cmd) != null) {
// Execute an assignment like var a = 3.5;
evalexpr(cmd);
}
else {
// Evaluate an expression like 3 -5 * Math.PI
evalexpr(cmd_right);
}
} catch (Exception e) {
e.Dump();
}
}
}
public void evalexpr(string cmd)
{
try
{
if(session.Execute(cmd) != null)
{
// Evaluate the expression
var res = session.Execute<double>(cmd);
// Dump the result
res.Dump("=");
// assign value to the ans variable
session.Execute(@"ans = " + res + @";");
// add empty line
("").Dump();
}
} catch(Exception e) {
e.Dump();
}
}
private void greetingMessage()
{
("----------------------------------------------------------------").Dump();
("LINQPad REPL - v.0.05 - Based on ScriptCs.Roslyn").Dump();
("-----------------------------------------------------------------").Dump();
(" - Last update: 30.01.2014").Dump();
("--------------------------------------------------------------------------------------").Dump();
("Enter an expression like:").Dump();
(" 4 + 5 ").Dump();
(" var a = 3.5;").Dump();
(" var d = 4 * Math.PI").Dump();
("in the black console window below.").Dump();
("--------------------------------------------------------------------------------------").Dump();
("You can omit the semicolon (;) at the end of a line. LINQPadREPL adds it automatically.").Dump();
("-------------------------------------------------------").Dump();
("").Dump();
}
}
Open a new Query (C# Statements) and start the C# REPL within LINQPad:
CSrepl repl = new CSrepl();
It's a very simple solution and a lot of work remains until it is stable.