public override void Evaluate(Runtime Runtime)
{
FuncExpr.Evaluate(Runtime);
if (!(Runtime.Register is FuncInfo))
{
if (FuncExpr is VarExpr)
{
throw new Exception("Runtime error. \'" + (FuncExpr as VarExpr).Identifier + "\' is not a function.");
}
else
{
throw new Exception("Runtime error. Attempt to call non-function.");
}
}
FuncInfo Function = (FuncInfo)Runtime.Register;
if (Function.Parameters.Count != Parameters.Count)
{
//Parameter mismatch
throw new Exception("Invalid amount of parameters for function \'" + Function.Identifier + "\' Found " + Parameters.Count + ", expected " + Function.Parameters.Count);
}
Runtime.RunScope(Function.Body, Parameters);
if (Runtime.Returning)
{
Runtime.Returning = false;
}
//Return null from function if no return statement was present
else
{
Runtime.Register = null;
}
}
public override IExpr Build(BuildContext ctx, IExprBuilder initiator, Func <IExpr> next)
{
if (ctx.Token is LiteralToken t)
{
var func = Env.GetFunc(t.String);
if (func == null)
{
throw new CodeBuildEx(t.IdxS, t.IdxE,
string.Format(
tr.the_name__0__does_not_exist_in_the_current_environment,
t.String
));
}
ctx.NextIndex();
var funcExpr = new FuncExpr(Env)
{
Token = t, Func = func
};
ThrowIf(ctx.Token, token => !(ctx.Token is ParenthesisToken openT) || !openT.IsOpen);
funcExpr.ArgsBlockOpenToken = (ParenthesisToken)ctx.Token;
ctx.NextIndex();
IExpr expr;
while (true)
{
expr = next();
ThrowIfExprIsNull(expr, ctx.Token);
if (ctx.Token is ParenthesisToken token && !token.IsOpen)
{
funcExpr.Args.Add(expr);
funcExpr.ArgsBlockCloseToken = token;
break;
}
if (ctx.Token is SeparatorToken)
{
funcExpr.Args.Add(expr);
ctx.NextIndex();
continue;
}
ctx.PushExpr(expr);
}
func.ValidateArgs(Env, funcExpr.Args);
ctx.NextIndex();
return(funcExpr);
}
return(null);
}
public override object VisitFuncExpr([NotNull] SQLiteParser.FuncExprContext context)
{
List <Expr> args = new List <Expr>();
foreach (var v in context.arith_expr())
{
args.Add(Visit(v) as Expr);
}
return(FuncExpr.BuildFuncExpr(context.function_name().GetText(), args));
}
void IVisitor.VisitBefore(FuncExpr expr)
{
this.ParentExists(expr);
}
void IVisitor.VisitAfter(FuncExpr expr)
{
this.ParentExists(expr);
}
public string Compile(FuncExpr funcExpr, List <XSqlCommandParam> Params)
{
throw new NotImplementedException();
}
