protected override bool DoResolve (BlockContext ec)
{
if (Expr == null) {
if (ec.ReturnType == TypeManager.void_type)
return true;
if (ec.CurrentIterator != null) {
Error_ReturnFromIterator (ec);
} else {
ec.Report.Error (126, loc,
"An object of a type convertible to `{0}' is required for the return statement",
ec.ReturnType.GetSignatureForError ());
}
return false;
}
Expr = Expr.Resolve (ec);
AnonymousExpression am = ec.CurrentAnonymousMethod;
if (am == null) {
if (ec.ReturnType == TypeManager.void_type) {
ec.Report.Error (127, loc,
"`{0}': A return keyword must not be followed by any expression when method returns void",
ec.GetSignatureForError ());
}
} else {
if (am.IsIterator) {
Error_ReturnFromIterator (ec);
return false;
}
var l = am as AnonymousMethodBody;
if (l != null && l.ReturnTypeInference != null && Expr != null) {
l.ReturnTypeInference.AddCommonTypeBound (Expr.Type);
return true;
}
}
if (Expr == null)
return false;
if (Expr.Type != ec.ReturnType) {
Expr = Convert.ImplicitConversionRequired (ec, Expr, ec.ReturnType, loc);
if (Expr == null) {
if (am != null) {
ec.Report.Error (1662, loc,
"Cannot convert `{0}' to delegate type `{1}' because some of the return types in the block are not implicitly convertible to the delegate return type",
am.ContainerType, am.GetSignatureForError ());
}
return false;
}
}
return true;
}
protected override bool DoResolve (BlockContext ec)
{
if (Expr == null) {
if (ec.ReturnType == TypeManager.void_type)
return true;
ec.Report.Error (126, loc,
"An object of a type convertible to `{0}' is required for the return statement",
TypeManager.CSharpName (ec.ReturnType));
return false;
}
if (ec.CurrentBlock.Toplevel.IsIterator) {
ec.Report.Error (1622, loc, "Cannot return a value from iterators. Use the yield return " +
"statement to return a value, or yield break to end the iteration");
}
AnonymousExpression am = ec.CurrentAnonymousMethod;
if (am == null && ec.ReturnType == TypeManager.void_type) {
ec.Report.Error (127, loc, "`{0}': A return keyword must not be followed by any expression when method returns void",
ec.GetSignatureForError ());
}
Expr = Expr.Resolve (ec);
if (Expr == null)
return false;
if (ec.HasSet (ResolveContext.Options.InferReturnType)) {
ec.ReturnTypeInference.AddCommonTypeBound (Expr.Type);
return true;
}
if (Expr.Type != ec.ReturnType) {
Expr = Convert.ImplicitConversionRequired (ec, Expr, ec.ReturnType, loc);
if (Expr == null) {
if (am != null) {
ec.Report.Error (1662, loc,
"Cannot convert `{0}' to delegate type `{1}' because some of the return types in the block are not implicitly convertible to the delegate return type",
am.ContainerType, am.GetSignatureForError ());
}
return false;
}
}
return true;
}