protected override async Task <IBifoqlObject> DoApply(QueryContext context)
{
IBifoqlObject ignored;
if (context.Variables.TryGetValue(Name, out ignored))
{
return(new AsyncError(this.Location, $"Can't change value of variable '${Name}'"));
}
else
{
// Get the new value and add to the context as a variable, and replace the current object with that new value as well.
var variableValue = await Value.Apply(context);
var newContext = context.AddVariable(Name, variableValue);
var simplified = _pipedInto.Simplify(newContext.Variables);
return(await simplified.Apply(newContext));
}
}