private static EvaluationResult IsFalse(Context context, ModuleLiteral env, EvaluationStackFrame args)
{
var condition = Args.AsBool(args, 0);
var message = Args.AsStringOptional(args, 1);
Assert.False(condition, message);
return(EvaluationResult.Undefined);
}
private static EvaluationResult Assert(Context context, ModuleLiteral env, EvaluationStackFrame args)
{
bool predicate = Args.AsBool(args, 0);
string message = Args.AsStringOptional(args, 1) ?? string.Empty;
if (!predicate)
{
throw new ContractAssertException(message);
}
return(EvaluationResult.Undefined);
}
private EvaluationResult AddIf(Context context, ModuleLiteral env, EvaluationStackFrame args)
{
var condition = Args.AsBool(args, 0);
if (!condition)
{
// Return empty Array
var entry = context.TopStack;
return(EvaluationResult.Create(ArrayLiteral.CreateWithoutCopy(new EvaluationResult[0], entry.InvocationLocation, entry.Path)));
}
var items = Args.AsArrayLiteral(args, 1);
return(EvaluationResult.Create(items));
}
private EvaluationResult AddIfLazy(Context context, ModuleLiteral env, EvaluationStackFrame args)
{
var condition = Args.AsBool(args, 0);
if (!condition)
{
// Return empty Array
var entry = context.TopStack;
return(EvaluationResult.Create(ArrayLiteral.CreateWithoutCopy(new EvaluationResult[0], entry.InvocationLocation, entry.Path)));
}
// Call the function passed in and return that result
var closure = Args.AsClosure(args, 1);
var result = context.InvokeClosure(closure, closure.Frame);
if (result.IsErrorValue)
{
return(EvaluationResult.Error);
}
return(result);
}