public override SValue Clone()
{
SClosure ret = new SClosure(InnerEnv, Arguments, Body);
SValue.CopyAttributes(ret, this);
return(ret);
}
private SValue execLoop(SClosure body, SValue v, Decimal idx)
{
var newEnv = new ExecEnvironment();
if (body.Arguments.Count >= 1)
{
newEnv[body.Arguments[0]] = v;
}
if (body.Arguments.Count == 2)
{
newEnv[body.Arguments[1]] = new SNumber(idx);
}
newEnv.ParentEnv = body.InnerEnv;
return(body.Body.Evaluate(newEnv));
}
public override SValue Evaluate(ExecEnvironment env)
{
var newEnv = new ExecEnvironment();
SValue _closure;
SClosure closure = null;
if (lambdaObject == null)
{
if (env.ContainsKey(closureName))
{
_closure = env[closureName].Evaluate(env);
closure = _closure as SClosure;
}
else
{
_closure = new SString(closureName);
env[closureName] = _closure;
}
}
else
{
_closure = lambdaObject.Evaluate(env);
closure = _closure as SClosure;
}
List <SValue> arguments = SExpression.EvalSExpressions(this.arguments, env);
if (closure == null)
{
List <SValue> ret = new List <SValue>();
ret.Add(_closure);
foreach (var a in arguments)
{
ret.Add(a);
}
return(new SList(ret));
}
if (closure.Arguments.Count() > arguments.Count())
{
var argNames = closure.Arguments.Skip(arguments.Count);
return(new SClosure(
env, argNames.ToList(), new SECall(
closure,
arguments.ConvertAll(a => (SExpression)a)
.Concat(argNames.Select(a => new SEVariable(a, headAtom, tailCompound))).ToList(),
headAtom, tailCompound
)
));
}
// prepare the executing environment
for (int i = 0; i < closure.Arguments.Count(); i++)
{
string argName = closure.Arguments[i];
if (argName.Length > 3 && argName.Substring(argName.Length - 3) == "...")
{
argName = argName.Substring(0, argName.Length - 3);
newEnv[argName] = new SList(arguments.Skip(i).ToList());
break;
}
else
{
newEnv[argName] = arguments[i];
}
}
newEnv["~parent"] = new SDict(closure.InnerEnv);
newEnv["~atom"] = new SObject(headAtom);
newEnv.ParentEnv = closure.InnerEnv;
return(closure.Body.Evaluate(newEnv));
}