private SyntaxTree?TryGetSyntaxTree(string fullFileName, out DiagnosticBuilder.ErrorBuilderDelegate?failureBuilder)
{
var normalizedFileName = fileResolver.GetNormalizedFileName(fullFileName);
if (syntaxTrees.TryGetValue(normalizedFileName, out var syntaxTree))
{
failureBuilder = null;
return(syntaxTree);
}
if (syntaxTreeLoadFailures.TryGetValue(normalizedFileName, out failureBuilder))
{
return(null);
}
var fileContents = fileResolver.TryRead(normalizedFileName, out var failureMessage);
if (fileContents == null)
{
// TODO: If we upgrade to netstandard2.1, we should be able to use the following to hint to the compiler that failureBuilder is non-null:
// https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/attributes/nullable-analysis
var concreteFailureMessage = failureMessage ?? throw new InvalidOperationException($"Expected {nameof(fileResolver.TryRead)} to provide failure diagnostics");
failureBuilder = x => x.ErrorOccurredLoadingModule(concreteFailureMessage);
syntaxTreeLoadFailures[normalizedFileName] = failureBuilder;
return(null);
}
failureBuilder = null;
return(AddSyntaxTree(normalizedFileName, fileContents));
}
public static SyntaxTreeGrouping Build(IFileResolver fileResolver, string entryFileName)
{
var builder = new SyntaxTreeGroupingBuilder(fileResolver);
var normalizedFileName = fileResolver.GetNormalizedFileName(entryFileName);
return(builder.Build(normalizedFileName));
}
public static SyntaxTreeGrouping BuildWithPreloadedFile(IFileResolver fileResolver, string entryFileName, string fileContents)
{
var builder = new SyntaxTreeGroupingBuilder(fileResolver);
var normalizedFileName = fileResolver.GetNormalizedFileName(entryFileName);
builder.AddSyntaxTree(normalizedFileName, fileContents);
return(builder.Build(normalizedFileName));
}