/// <summary>
/// Map parameter names to positional names. This must match the expectations of the interpreter
/// </summary>
private static void ParameterPositions(Scope parameterNames, IEnumerable <string> paramNames, NanCodeWriter wr)
{
parameterNames.PushScope();
var i = 0;
foreach (var paramName in paramNames)
{
if (parameterNames.InScope(NanTags.GetCrushedName(paramName)))
{
throw new Exception("Duplicate parameter '" + paramName + "'.\r\n" +
"All parameter names must be unique in a single function definition.");
}
var originalReference = NanTags.GetCrushedName(paramName);
var parameterReference = Scope.NameFor(i);
var parameterByteCode = NanTags.EncodeVariableRef(parameterReference);
parameterNames.SetValue(originalReference, parameterByteCode);
wr.AddSymbol(originalReference, paramName);
wr.AddSymbol(parameterReference, "param[" + i + "]");
i++;
}
}