public Value Evaluate(Environment environment)
{
var list = expression.Evaluate(environment);
if (list.IsInput())
{
var input = list.AsInput();
Value result = ValueBoolean.TRUE;
string line = null;
try
{
line = input.ReadLine();
while (line != null)
{
var value = new ValueString(line);
if (identifiers.Count == 1)
{
environment.Put(identifiers[0], value);
}
else
{
var vals = value.AsList().GetValue();
for (int i = 0; i < identifiers.Count; i++)
{
environment.Put(identifiers[i], vals[i]);
}
}
result = block.Evaluate(environment);
if (result.IsBreak())
{
result = ValueBoolean.TRUE;
break;
}
if (result.IsContinue())
{
result = ValueBoolean.TRUE;
// continue
}
if (result.IsReturn())
{
break;
}
line = input.ReadLine();
}
if (identifiers.Count == 1)
{
environment.Remove(identifiers[0]);
}
else
{
for (var i = 0; i < identifiers.Count; i++)
{
environment.Remove(identifiers[i]);
}
}
}
catch (IOException)
{
throw new ControlErrorException(new ValueString("ERROR"), "Cannot read from input", pos);
}
return(result);
}
if (list.IsList())
{
Value result = ValueBoolean.TRUE;
foreach (var value in list.AsList().GetValue())
{
if (identifiers.Count == 1)
{
environment.Put(identifiers[0], value);
}
else
{
var vals = value.AsList().GetValue();
for (int i = 0; i < identifiers.Count; i++)
{
environment.Put(identifiers[i], vals[i]);
}
}
result = block.Evaluate(environment);
if (result.IsBreak())
{
result = ValueBoolean.TRUE;
break;
}
if (result.IsContinue())
{
result = ValueBoolean.TRUE;
// continue
}
if (result.IsReturn())
{
break;
}
}
if (identifiers.Count == 1)
{
environment.Remove(identifiers[0]);
}
else
{
for (var i = 0; i < identifiers.Count; i++)
{
environment.Remove(identifiers[i]);
}
}
return(result);
}
if (list.IsSet())
{
Value result = ValueBoolean.TRUE;
foreach (var value in list.AsSet().GetValue())
{
if (identifiers.Count == 1)
{
environment.Put(identifiers[0], value);
}
else
{
var vals = value.AsList().GetValue();
for (int i = 0; i < identifiers.Count; i++)
{
environment.Put(identifiers[i], vals[i]);
}
}
result = block.Evaluate(environment);
if (result.IsBreak())
{
result = ValueBoolean.TRUE;
break;
}
if (result.IsContinue())
{
result = ValueBoolean.TRUE;
// continue
}
if (result.IsReturn())
{
break;
}
}
if (identifiers.Count == 1)
{
environment.Remove(identifiers[0]);
}
else
{
for (var i = 0; i < identifiers.Count; i++)
{
environment.Remove(identifiers[i]);
}
}
return(result);
}
if (list.IsMap())
{
Value result = ValueBoolean.TRUE;
if (what == "keys")
{
foreach (var val in list.AsMap().GetValue().Keys.ToList())
{
if (identifiers.Count == 1)
{
environment.Put(identifiers[0], val);
}
else
{
var vals = val.AsList().GetValue();
for (int i = 0; i < identifiers.Count; i++)
{
environment.Put(identifiers[i], vals[i]);
}
}
result = block.Evaluate(environment);
if (result.IsBreak())
{
result = ValueBoolean.TRUE;
break;
}
if (result.IsContinue())
{
result = ValueBoolean.TRUE;
// continue
}
if (result.IsReturn())
{
break;
}
}
}
else if (what == "values")
{
foreach (var val in list.AsMap().GetValue().Values.ToList())
{
if (identifiers.Count == 1)
{
environment.Put(identifiers[0], val);
}
else
{
var vals = val.AsList().GetValue();
for (int i = 0; i < identifiers.Count; i++)
{
environment.Put(identifiers[i], vals[i]);
}
}
result = block.Evaluate(environment);
if (result.IsBreak())
{
result = ValueBoolean.TRUE;
break;
}
if (result.IsContinue())
{
result = ValueBoolean.TRUE;
// continue
}
if (result.IsReturn())
{
break;
}
}
}
else if (what == "entries")
{
foreach (var entry in list.AsMap().GetValue().ToList())
{
ValueList val = new ValueList();
val.AddItem(entry.Key);
val.AddItem(entry.Value);
if (identifiers.Count == 1)
{
environment.Put(identifiers[0], val);
}
else
{
var vals = val.AsList().GetValue();
for (int i = 0; i < identifiers.Count; i++)
{
environment.Put(identifiers[i], vals[i]);
}
}
result = block.Evaluate(environment);
if (result.IsBreak())
{
result = ValueBoolean.TRUE;
break;
}
if (result.IsContinue())
{
result = ValueBoolean.TRUE;
// continue
}
if (result.IsReturn())
{
break;
}
}
}
if (identifiers.Count == 1)
{
environment.Remove(identifiers[0]);
}
else
{
for (var i = 0; i < identifiers.Count; i++)
{
environment.Remove(identifiers[i]);
}
}
return(result);
}
if (list.IsObject())
{
Value result = ValueBoolean.TRUE;
if (what == "keys")
{
foreach (var key in list.AsObject().value.Keys.ToList())
{
Value val = new ValueString(key);
environment.Put(identifiers[0], val);
result = block.Evaluate(environment);
if (result.IsBreak())
{
result = ValueBoolean.TRUE;
break;
}
if (result.IsContinue())
{
result = ValueBoolean.TRUE;
// continue
}
if (result.IsReturn())
{
break;
}
}
}
else if (what == "values")
{
foreach (var val in list.AsObject().value.Values.ToList())
{
if (identifiers.Count == 1)
{
environment.Put(identifiers[0], val);
}
else
{
var vals = val.AsList().GetValue();
for (int i = 0; i < identifiers.Count; i++)
{
environment.Put(identifiers[i], vals[i]);
}
}
result = block.Evaluate(environment);
if (result.IsBreak())
{
result = ValueBoolean.TRUE;
break;
}
if (result.IsContinue())
{
result = ValueBoolean.TRUE;
// continue
}
if (result.IsReturn())
{
break;
}
}
}
else if (what == "entries")
{
foreach (var entry in list.AsObject().value.ToList())
{
var val = new ValueList();
val.AddItem(new ValueString(entry.Key));
val.AddItem(entry.Value);
if (identifiers.Count == 1)
{
environment.Put(identifiers[0], val);
}
else
{
var vals = val.AsList().GetValue();
for (int i = 0; i < identifiers.Count; i++)
{
environment.Put(identifiers[i], vals[i]);
}
}
result = block.Evaluate(environment);
if (result.IsBreak())
{
result = ValueBoolean.TRUE;
break;
}
if (result.IsContinue())
{
result = ValueBoolean.TRUE;
// continue
}
if (result.IsReturn())
{
break;
}
}
}
if (identifiers.Count == 1)
{
environment.Remove(identifiers[0]);
}
else
{
for (var i = 0; i < identifiers.Count; i++)
{
environment.Remove(identifiers[i]);
}
}
return(result);
}
if (list.IsString())
{
var str = list.AsString().GetValue();
Value result = ValueBoolean.TRUE;
foreach (var value in str)
{
environment.Put(identifiers[0], new ValueString(value.ToString()));
result = block.Evaluate(environment);
if (result.IsBreak())
{
result = ValueBoolean.TRUE;
break;
}
if (result.IsContinue())
{
result = ValueBoolean.TRUE;
// continue
}
if (result.IsReturn())
{
break;
}
}
environment.Remove(identifiers[0]);
return(result);
}
throw new ControlErrorException(new ValueString("ERROR"), "Cannot iterate over " + list, pos);
}