public override IEnumerable <Position> Execute(UnreadableEnv env)
{
// Evaluate the condition
foreach (var pos in _argCond.Execute(env))
{
yield return(pos);
}
yield return(Position);
var value = env.Pop();
if (value == null)
{
throw new Exception("If condition cannot be void.");
}
var codeToExecute = value.Value.IsZero ? _argNCode : _argYCode;
// Execute the code
foreach (var pos in codeToExecute.Execute(env))
{
yield return(pos);
}
// Last result is now on the stack
yield return(Position);
}
public override IEnumerable <Position> Execute(UnreadableEnv env)
{
env.Push(null);
again:
// Evaluate the condition
foreach (var pos in _argCond.Execute(env))
{
yield return(pos);
}
yield return(Position);
var value = env.Pop();
if (value == null)
{
throw new Exception("While condition cannot be void.");
}
if (!value.Value.IsZero)
{
// Discard result from previous iteration
env.Pop();
// Execute the code
foreach (var pos in _argCode.Execute(env))
{
yield return(pos);
}
yield return(Position);
goto again;
}
// Last result is now on the stack
yield return(Position);
}
public override IEnumerable<Position> Execute(UnreadableEnv env)
{
env.Push(null);
again:
// Evaluate the condition
foreach (var pos in _argCond.Execute(env))
yield return pos;
yield return Position;
var value = env.Pop();
if (value == null)
throw new Exception("While condition cannot be void.");
if (!value.Value.IsZero)
{
// Discard result from previous iteration
env.Pop();
// Execute the code
foreach (var pos in _argCode.Execute(env))
yield return pos;
yield return Position;
goto again;
}
// Last result is now on the stack
yield return Position;
}
public override IEnumerable<Position> Execute(UnreadableEnv env)
{
// Evaluate the condition
foreach (var pos in _argCond.Execute(env))
yield return pos;
yield return Position;
var value = env.Pop();
if (value == null)
throw new Exception("If condition cannot be void.");
var codeToExecute = value.Value.IsZero ? _argNCode : _argYCode;
// Execute the code
foreach (var pos in codeToExecute.Execute(env))
yield return pos;
// Last result is now on the stack
yield return Position;
}
