evaluateCall method

EvaluateOutput evaluateCall(EvaluateInput input)

Implementation

EvaluateOutput evaluateCall(EvaluateInput input) {
  final call = input.expr.call;
  final found = input.defStack.find(call.ident);
  if (found == null) {
    final ext = config.extension[call.ident];
    if (ext == null) {
      return _errorReferenceNotFound(input.expr.path, call.ident);
    }
    final args = <String, Value>{};
    for (final entry in call.args.entries) {
      final argVal = evaluateExpr(
          EvaluateInput(defStack: input.defStack, expr: entry.value));
      if (argVal.status != EvaluateOutput_Status.OK) {
        return argVal;
      }
      args[entry.key] = argVal.value;
    }
    return ext(input.expr.path, args);
  }
  var st = found;
  for (final argName in found.def.args) {
    final arg = call.args[argName];
    if (arg == null) {
      return _errorArgumentMismatch(input.expr.path, argName);
    }
    final argVal =
        evaluateExpr(EvaluateInput(defStack: input.defStack, expr: arg));
    if (argVal.status != EvaluateOutput_Status.OK) {
      return argVal;
    }
    st = st.register(newDefinition(
        input.expr.path.append([call.ident, argName]),
        argName,
        argVal.value));
  }
  return evaluateExpr(EvaluateInput(defStack: st, expr: found.def.body));
}