public override void VisitAfter(SubstringFunc expr)
{
Expr arg3 = null;
if (expr.Argument3 != null)
{
arg3 = (Expr)_stack.Pop();
}
Expr arg2 = (Expr)_stack.Pop();
Expr arg1 = (Expr)_stack.Pop();
if (object.ReferenceEquals(expr.Argument1, arg1) &&
object.ReferenceEquals(expr.Argument2, arg2) &&
object.ReferenceEquals(expr.Argument3, arg3))
{
_stack.Push(expr);
return;
}
var node = new SubstringFunc(expr.Name
, arg1, arg2, arg3
, expr.Separator1IsComma
, expr.Separator2IsComma
, expr.Comments.Clone());
_stack.Push(node);
}
public override void VisitAfter(SubstringFunc expr)
{
if (IsPlaceHolderExpr(expr.Argument1))
{
expr.Argument1 = Place((PlaceHolderExpr)expr.Argument1);
}
if (IsPlaceHolderExpr(expr.Argument2))
{
expr.Argument2 = Place((PlaceHolderExpr)expr.Argument2);
}
if (IsPlaceHolderExpr(expr.Argument3))
{
expr.Argument3 = Place((PlaceHolderExpr)expr.Argument3);
}
}
public override void ExitSubstring_function(MiniSqlParserParser.Substring_functionContext context)
{
var comments = this.GetComments(context);
Expr arg3 = null;
bool isComma2 = false;
if (context.expr().Length == 3)
{
arg3 = (Expr)_stack.Pop();
isComma2 = context.K_FOR() == null;
}
Expr arg2 = (Expr)_stack.Pop();
bool isComma1 = context.K_FROM() == null;
Expr arg1 = (Expr)_stack.Pop();
var name = this.Coalesce(context.K_SUBSTRING(), context.K_SUBSTR());
var node = new SubstringFunc(name, arg1, arg2, arg3, isComma1, isComma2, comments);
_stack.Push(node);
}
virtual public void VisitOnSeparator(SubstringFunc expr, int offset, int i)
{
}
virtual public void VisitAfter(SubstringFunc expr)
{
}
virtual public void VisitBefore(SubstringFunc expr)
{
}
public void VisitOnSeparator(SubstringFunc expr, int offset, int i)
{
_visitor.VisitOnSeparator(expr, offset, i);
}
public void VisitAfter(SubstringFunc expr)
{
_visitor.VisitAfter(expr);
}
public void VisitBefore(SubstringFunc expr)
{
_visitor.VisitBefore(expr);
}
