/// <summary>
/// Validate the statements for errors.
/// </summary>
/// <param name="stmts">Statements to validate</param>
/// <returns></returns>
public RunResult Validate(List<Expr> stmts)
{
var start = DateTime.Now;
if (stmts == null || stmts.Count == 0)
return new RunResult(start, start, true, "No nodes to validate");
_ctx = stmts[0].Ctx;
// Reset the errors.
_errors = new List<ScriptError>();
_parseStk = new ParseStackManager();
// Use the visitor to walk the AST tree of statements/expressions
var visitor = new AstVisitor((astnode1) => Validate(astnode1), (astnode2) =>OnNodeEnd(astnode2));
visitor.Visit(stmts);
var end = DateTime.Now;
// Now check for success.
bool success = _errors.Count == 0;
_results = new RunResult(start, end, success, _errors);
_results.Errors = _errors;
return _results;
}