protected override AstNode?After(AstNode node, bool inList)
{
if (node is AstToplevel toplevel && _shadowedWindow)
{
var newVar = new AstVar(toplevel);
var name = new AstSymbolVar("global");
newVar.Definitions.Add(new AstVarDef(toplevel, name, new AstSymbolRef("window")));
toplevel.Body.Insert(0) = newVar;
}
return(node);
}
protected override AstNode?Before(AstNode node, bool inList)
{
if (node.IsSymbolDef().IsGlobalSymbol() is {} symbolName)
{
if (symbolName == "global")
{
foreach (var parent in Parents())
{
if (parent is AstScope scope)
{
if (scope.Variables !.ContainsKey("window") || scope.Functions !.ContainsKey("window"))
{
_shadowedWindow = true;
return(null);
}
}
}
return(new AstSymbolRef(node, "window"));
}
}
if (node is AstSimpleStatement simpleStatement && simpleStatement.Body is AstAssign assigment &&
assigment.Operator == Operator.Assignment)
{
if (assigment.Left is AstDot dot && dot.PropertyAsString == "exports" &&
dot.Expression.IsSymbolDef().IsGlobalSymbol() == "module")
{
var res = new AstVar(node);
var newVar = new AstSymbolVar(assigment.Left, _varName);
ResultingSymbol = newVar;
res.Definitions.Add(new AstVarDef(assigment.Left, newVar, assigment.Right));
return(Transform(res));
}
}
return(null);
}
AstNode ParseVarId(VariableKind kind)
{
var id = ParseBindingAtom();
CheckLVal(id, true, kind);
if (id is AstSymbol)
{
if (kind == VariableKind.Let)
{
id = new AstSymbolLet((AstSymbol)id);
}
else if (kind == VariableKind.Const)
{
id = new AstSymbolConst((AstSymbol)id);
}
else
{
id = new AstSymbolVar((AstSymbol)id);
}
}
return(id);
}