/// <inheritdoc/>
public IEnumerable <CToken> Expand(IPreProcessor preProcessor, IReadOnlyList <IReadOnlyList <CToken> > arguments)
{
var isVariadic = this.Parameters is not null &&
this.Parameters.Count > 0 &&
this.Parameters[this.Parameters.Count - 1] == "...";
var hasVariadicArgs = true;
if (this.Parameters is not null && this.Parameters.Count != arguments.Count)
{
// This can still be ok if we are variadic and the count is only one less
if (!isVariadic || this.Parameters.Count != arguments.Count + 1)
{
// TODO: Proper error handling
throw new NotImplementedException();
}
if (isVariadic)
{
hasVariadicArgs = false;
}
}
// Assign the arguments
var argDict = new Dictionary <string, IReadOnlyList <CToken> >();
if (this.Parameters is not null)
{
for (var i = 0; i < arguments.Count;)
{
var paramName = this.Parameters[i];
if (paramName == "...")
{
paramName = "__VA_ARGS__";
}
// We expand each argument to conform standards
argDict[paramName] = preProcessor.Expand(arguments[i]).ToList();
++i;
}
}
// If we have no variadic arguments but need it, just define it as empty
if (!hasVariadicArgs)
{
argDict["__VA_ARGS__"] = Array.Empty <CToken>();
}
// Do the substitution
var result = new List <CToken>();
foreach (var element in this.body)
{
result.AddRange(ExpandElement(argDict, element));
}
return(result);
}
