private 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);
}
public BoundGlobalScope(BoundGlobalScope _previous, ImmutableArray <Diagnostic> _diagnostics, ImmutableArray <VariableSymbol> _variables, BoundStatement _statement)
{
Previous = _previous;
Diagnostics = _diagnostics;
Variables = _variables;
Statement = _statement;
}
public static BoundGlobalScope BindGlobalScope(BoundGlobalScope _previous, CompilationUnitSyntax _syntax)
{
var _parentScope = CreateParentScopes(_previous);
var _binder = new Binder(_parentScope);
var _expression = _binder.BindStatement(_syntax.Statement);
var _variables = _binder.scope.GetDeclaredVariables();
var _diagnostics = _binder.Diagnostics.ToImmutableArray();
if (_previous != null)
{
_diagnostics = _diagnostics.InsertRange(0, _previous.Diagnostics);
}
return(new BoundGlobalScope(_previous, _diagnostics, _variables, _expression));
}