public override ConstraintResult ApplyTo <TActual>(TActual actual)
{
string actualContract;
switch (actual)
{
case string sourceCode:
actualContract = isVisualBasic
? AssemblyUtils.GenerateContract(generator, sourceCode, Microsoft.CodeAnalysis.VisualBasic.LanguageVersion.Latest, assemblyResolver)
: AssemblyUtils.GenerateContract(generator, sourceCode, Microsoft.CodeAnalysis.CSharp.LanguageVersion.Latest, assemblyResolver);
break;
case Compilation compilation:
using (var stream = new MemoryStream())
{
AssemblyUtils.EmitCompilation(compilation, stream);
stream.Seek(0, SeekOrigin.Begin);
actualContract = AssemblyUtils.GenerateContract(generator, stream, assemblyResolver);
}
break;
case MetadataBuilder metadataBuilder:
var blobBuilder = new BlobBuilder();
var peBuilder = new ManagedPEBuilder(
PEHeaderBuilder.CreateLibraryHeader(),
new MetadataRootBuilder(metadataBuilder),
ilStream: new BlobBuilder());
peBuilder.Serialize(blobBuilder);
using (var stream = new MemoryStream(blobBuilder.ToArray(), writable: false))
actualContract = AssemblyUtils.GenerateContract(generator, stream, assemblyResolver);
break;
default:
throw new ArgumentException("Expected source code as string or library IL as MetadataBuilder.", nameof(actual));
}
return(new ContractConstraintResult(this, actualContract, expected));
}