public static BoundScope CreateParentScopes(BoundGlobalScope previous)
{
var stack = new Stack <BoundGlobalScope>();
while (previous != null)
{
stack.Push(previous);
previous = previous.Previous;
}
BoundScope parent = null;
while (stack.Count > 0)
{
previous = stack.Pop();
var scope = new BoundScope(parent);
foreach (var v in previous.Variables)
{
scope.TryDeclare(v);
}
parent = scope;
}
return(parent);
}
private VariableSymbol DeclareVariable(SyntaxToken identifier, TypeSymbol type, bool isReadOnly)
{
var name = identifier.Text ?? "?";
var variable = new VariableSymbol(name, isReadOnly, type);
if (!identifier.IsMissing && !_scope.TryDeclare(variable))
{
_diagnostics.ReportVariableAlreadyDeclared(identifier.Span, name);
}
return(variable);
}