private void RecordAugmentations(IEnumerable <CSharpSyntaxNode> statements)
{
// get the parent assigned variables, and static status
// it should be the same for all statements, as we're operating at the block level here
var parentAssigned = GetAssignedVariablesAtParent(statements.First());
var isInStaticMethod = _semanticModel.GetEnclosingSymbol(statements.First().SpanStart).IsStatic;
var dataFlowIn = _semanticModel.AnalyzeDataFlow(statements.First()).DataFlowsIn;
var filteredStatements = FilterStatementsByRegions(statements).ToList();
for (int i = 0; i < statements.Count(); i++)
{
var statement = filteredStatements[i];
var prevAssigned = i > 0 ? _semanticModel.AnalyzeDataFlow(filteredStatements[0], filteredStatements[i - 1]).AlwaysAssigned : Enumerable.Empty <ISymbol>();
var assigned = prevAssigned.Union(parentAssigned).Union(dataFlowIn);
// if the node has children, figure out what variables are valid inside, so the child nodes will be aware of them later on
var validForChildren = Enumerable.Empty <ISymbol>();
if (statement.ChildNodes().Any(n => n is BlockSyntax))
{
var dataFlow = _semanticModel.AnalyzeDataFlow(statement);
validForChildren = dataFlow.AlwaysAssigned.Union(dataFlow.DataFlowsIn);
}
var symbols = _semanticModel.LookupSymbols(statement.FullSpan.Start);
var locals = symbols.Where(s => s.Kind == SymbolKind.Local && assigned.Contains(s));
var fields = symbols.Where(s => s.Kind == SymbolKind.Field && (s.IsStatic || !isInStaticMethod));
var param = symbols.Where(s => s.Kind == SymbolKind.Parameter);
var augmentation = new Augmentation(statement, locals, fields, param, validForChildren);
Augmentations.Data[statement] = augmentation;
}
}
private static Augmentation MapAugmentationToViewport(Augmentation input, LinePositionSpan viewportSpan) => input.withPosition(
new FilePosition
{
Line = CalculateOffset(input.CurrentFilePosition.Line, viewportSpan),
Character = input.CurrentFilePosition.Character,
File = input.CurrentFilePosition.File
}
);
