/// <summary>
/// Returns a look-up of workspace edits suggested by the compiler for the given location and context.
/// The key of the look-up is a suitable title for the corresponding edits that can be presented to the user.
/// Returns null if any of the given arguments is null or if suitable edits cannot be determined.
/// </summary>
public static ILookup <string, WorkspaceEdit>?CodeActions(this FileContentManager file, CompilationUnit compilation, Range?range, CodeActionContext?context)
{
if (range?.Start is null || range.End is null || !file.ContainsRange(range))
{
return(null);
}
var diagnostics = context?.Diagnostics ?? Array.Empty <Diagnostic>();
return(file.UnknownIdSuggestions(compilation, range.Start.Line, diagnostics)
.Concat(file.AmbiguousIdSuggestions(compilation, diagnostics))
.Concat(file.DeprecatedSyntaxSuggestions(diagnostics))
.Concat(file.UpdateReassignStatementSuggestions(diagnostics))
.Concat(file.IndexRangeSuggestions(compilation, range))
.Concat(file.UnreachableCodeSuggestions(diagnostics))
.Concat(file.DocCommentSuggestions(range))
.ToLookup(s => s.Item1, s => s.Item2));
}