} // End Sub Test
// emit the compilation result into a byte array.
// throw an exception with corresponding message
// if there are errors
private static byte[] EmitToArray
(
this Microsoft.CodeAnalysis.Compilation compilation
)
{
using (System.IO.MemoryStream stream = new System.IO.MemoryStream())
{
// emit result into a stream
Microsoft.CodeAnalysis.Emit.EmitResult emitResult = compilation.Emit(stream);
if (!emitResult.Success)
{
// if not successful, throw an exception
Microsoft.CodeAnalysis.Diagnostic firstError =
emitResult
.Diagnostics
.FirstOrDefault
(
diagnostic =>
diagnostic.Severity ==
Microsoft.CodeAnalysis.DiagnosticSeverity.Error
);
throw new System.Exception(firstError?.GetMessage());
}
// get the byte array from a stream
return stream.ToArray();
} // End Using stream
} // End Function EmitToArray
public CompilationException(Microsoft.CodeAnalysis.Diagnostic diagnostic) : base(diagnostic.GetMessage())
{
var location = diagnostic.Location;
if (location != Microsoft.CodeAnalysis.Location.None)
{
Line = location.GetLineSpan().StartLinePosition.Line;
}
}
public static FileAnalysisEntry FromDiagnostic(Microsoft.CodeAnalysis.Diagnostic diagnostic)
{
var lineSpan = diagnostic.Location.GetLineSpan();
return(new FileAnalysisEntry
{
Id = diagnostic.Id,
Severity = diagnostic.Severity.ToString(),
Description = diagnostic.GetMessage(),
From = new EntryLocation {
Line = lineSpan.StartLinePosition.Line, Character = lineSpan.StartLinePosition.Character
},
To = new EntryLocation {
Line = lineSpan.EndLinePosition.Line, Character = lineSpan.EndLinePosition.Character
}
});
}
// https://gist.github.com/GeorgDangl/4a9982a3b520f056a9e890635b3695e0
private static void ThrowExceptionIfCompilationFailure(Microsoft.CodeAnalysis.Emit.EmitResult result)
{
if (!result.Success)
{
System.Collections.Generic.List <Microsoft.CodeAnalysis.Diagnostic> compilationErrors =
result.Diagnostics.Where(diagnostic =>
diagnostic.IsWarningAsError ||
diagnostic.Severity == Microsoft.CodeAnalysis.DiagnosticSeverity.Error)
.ToList();
if (compilationErrors.Any())
{
Microsoft.CodeAnalysis.Diagnostic firstError = compilationErrors.First();
string errorNumber = firstError.Id;
string errorDescription = firstError.GetMessage();
string firstErrorMessage = $"{errorNumber}: {errorDescription};";
throw new System.Exception($"Compilation failed, first error is: {firstErrorMessage}");
}
}
}
public Diagnostic(Context cx, Microsoft.CodeAnalysis.Diagnostic diag) : base(cx)
{
diagnostic = diag;
TryPopulate();
}
