public AnnotationGlobalScope(AnnotationGlobalScope prev, ImmutableArray <Diagnostic> diagnostics, ImmutableArray <VariableSymbol> symbols, AnnotatedStatement expression)
{
Previous = prev;
Diagnostics = diagnostics;
Symbols = symbols;
Expression = expression;
}
public static AnnotationGlobalScope AnnotateGlobalScope(AnnotationGlobalScope previous, CompilationUnitSyntax syntax)
{
var parentScope = CreateParentScope(previous);
var annotator = new Annotator(parentScope);
var expression = annotator.AnnotateStatement(syntax.Statement);
var symbols = annotator._scope.GetDeclaredVariables();
var diagnostics = annotator.Diagnostics.ToImmutableArray();
if (previous != null)
{
diagnostics = diagnostics.InsertRange(0, previous.Diagnostics);
}
return(new AnnotationGlobalScope(previous, diagnostics, symbols, expression));
}
private static AnnotationScope CreateParentScope(AnnotationGlobalScope previous)
{
var stack = new Stack <AnnotationGlobalScope>();
while (previous != null)
{
stack.Push(previous);
previous = previous.Previous;
}
AnnotationScope parent = null;
while (stack.Count > 0)
{
previous = stack.Pop();
var scope = new AnnotationScope(parent);
foreach (var v in previous.Symbols)
{
scope.TryDeclare(v);
}
parent = scope;
}
return(parent);
}