public async Task <bool> ParseCode()
{
bool retValue = true;
if (_codeSyntaxTree is null)
{
_codeSyntaxTree = await SyntaxTreeHelpers.ParseTextTaskAsync(_codetext);
_baseType = GetEntryPoint((CompilationUnitSyntax)_codeSyntaxTree.GetRoot());
if (String.IsNullOrEmpty(_baseType))
{
throw new ApplicationException("Cannot found entry point for code execution. Add static method Main to the first class");
}
_entryPoint = GetEntryPoint((CompilationUnitSyntax)_codeSyntaxTree.GetRoot());
}
return(retValue);
}
public async Task <bool> CompileAndRunCodeAsync()
{
bool retValue = true;
ResetStatus();
if (_codeSyntaxTree == null)
{
_codeSyntaxTree = await SyntaxTreeHelpers.ParseTextTaskAsync(_codeText);
}
string baseType = GetEntryPoint((CompilationUnitSyntax)_codeSyntaxTree.GetRoot());
if (String.IsNullOrEmpty(baseType))
{
throw new ApplicationException("Cannot found entry point for code execution. Add static method Main to the first class");
}
string assemblyName = Path.GetRandomFileName();
MetadataReference[] references = new MetadataReference[]
{
MetadataReference.CreateFromFile(typeof(object).Assembly.Location),
MetadataReference.CreateFromFile(typeof(Enumerable).Assembly.Location)
};
var compilation = CSharpCompilation.Create(assemblyName,
new[] { _codeSyntaxTree },
references,
new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary));
using (var ms = new MemoryStream())
{
EmitResult result = compilation.Emit(ms);
if (!result.Success)
{
IEnumerable <Diagnostic> failures = result.Diagnostics.Where(diagnostic =>
diagnostic.IsWarningAsError ||
diagnostic.Severity == DiagnosticSeverity.Error);
var errorsTmp = new StringBuilder();
foreach (Diagnostic diagnostic in failures)
{
errorsTmp.AppendLine($"{diagnostic.Id}: {diagnostic.GetMessage()}");
}
_lastErrors = errorsTmp.ToString();
retValue = false;
}
else
{
ms.Seek(0, SeekOrigin.Begin);
Assembly assembly = Assembly.Load(ms.ToArray());
Type type = assembly.GetType(baseType);
TextWriter tmp = Console.Out;
var codeoutput = new StringWriter();
Console.SetOut(codeoutput);
object obj = Activator.CreateInstance(type);
// Calculationg execution time. Another solution is - to use https://benchmarkdotnet.org/index.html
System.Diagnostics.Stopwatch sw = new Stopwatch();
sw.Start();
type.InvokeMember("Main",
BindingFlags.Default | BindingFlags.InvokeMethod,
null,
obj,
null);
sw.Stop();
_executionTime = sw.Elapsed;
Console.SetOut(tmp);
_codeOutput = codeoutput.ToString();
}
}
return(retValue);
}