Source Output Extensions¶

Extensions for safely adding generated source to the compilation.

OptionalEmit.AddSourceTo¶

Adds an OptionalEmit result as generated source, reporting any diagnostics:

context.RegisterSourceOutput(models, static (ctx, model) =>
{
    model.WriteStrongId()
        .AddSourceTo(ctx, HintName.From(model.Namespace, model.TypeName));
});

If the emit is invalid (e.g., model was null), diagnostics are reported and no source is added.

Behavior¶

Emit State	Action
Valid	Adds source with `ctx.AddSource(filename, code)`
Invalid with diagnostics	Reports each diagnostic via `ctx.ReportDiagnostic`
Invalid without diagnostics	No action (silent skip)

SourceProductionContext.AddSourceFrom¶

The reverse calling convention — same behavior:

ctx.AddSourceFrom(emitResult, hintName);

ReportDefaultError¶

Reports a generic code generation error:

try
{
    // generation logic
}
catch (Exception ex)
{
    context.ReportDefaultError(model, ex);
    // Reports DEEPGEN001: "Error generating code for {ModelType}: {message}"
}