public ALittleScriptMethodReturnTailDecElement GetMethodReturnTailDec()
{
if (m_flag_MethodReturnTailDec)
{
return(m_cache_MethodReturnTailDec);
}
m_flag_MethodReturnTailDec = true;
foreach (var child in m_childs)
{
if (child is ALittleScriptMethodReturnTailDecElement)
{
m_cache_MethodReturnTailDec = child as ALittleScriptMethodReturnTailDecElement;
break;
}
}
return(m_cache_MethodReturnTailDec);
}
public override ABnfGuessError CheckError()
{
ABnfElement parent = null;
if (m_element.GetReturnYield() != null)
{
// 对于ReturnYield就不需要做返回值检查
// 对所在函数进行检查，必须要有async和await表示
// 获取对应的函数对象
ABnfElement element = null;
parent = m_element;
while (parent != null)
{
if (parent is ALittleScriptClassMethodDecElement)
{
var method_dec = parent as ALittleScriptClassMethodDecElement;
var modifier = (method_dec.GetParent() as ALittleScriptClassElementDecElement).GetModifierList();
if (ALittleScriptUtility.GetCoroutineType(modifier) == null)
{
element = method_dec.GetMethodNameDec();
if (element == null)
{
element = method_dec;
}
}
break;
}
else if (parent is ALittleScriptClassStaticDecElement)
{
var method_dec = parent as ALittleScriptClassStaticDecElement;
var modifier = (method_dec.GetParent() as ALittleScriptClassElementDecElement).GetModifierList();
if (ALittleScriptUtility.GetCoroutineType(modifier) == null)
{
element = method_dec.GetMethodNameDec();
if (element == null)
{
element = method_dec;
}
}
break;
}
else if (parent is ALittleScriptGlobalMethodDecElement)
{
var method_dec = parent as ALittleScriptGlobalMethodDecElement;
var modifier = (method_dec.GetParent() as ALittleScriptNamespaceElementDecElement).GetModifierList();
if (ALittleScriptUtility.GetCoroutineType(modifier) == null)
{
element = method_dec.GetMethodNameDec();
if (element == null)
{
element = method_dec;
}
}
break;
}
parent = parent.GetParent();
}
if (element != null)
{
return(new ABnfGuessError(element, "函数内部使用了return yield表达式，所以必须使用async或await修饰"));
}
return(null);
}
var value_stat_list = m_element.GetValueStatList();
var return_type_list = new List <ALittleScriptAllTypeElement>();
ALittleScriptMethodReturnTailDecElement return_tail_dec = null;
// 获取对应的函数对象
parent = m_element;
while (parent != null)
{
if (parent is ALittleScriptClassGetterDecElement)
{
var getterDec = parent as ALittleScriptClassGetterDecElement;
return_type_list.Clear();
var return_type_dec = getterDec.GetAllType();
if (return_type_dec != null)
{
return_type_list.Add(return_type_dec);
}
break;
}
else if (parent is ALittleScriptClassSetterDecElement)
{
break;
}
else if (parent is ALittleScriptClassMethodDecElement)
{
var method_dec = parent as ALittleScriptClassMethodDecElement;
var return_dec = method_dec.GetMethodReturnDec();
if (return_dec != null)
{
var return_one_list = return_dec.GetMethodReturnOneDecList();
foreach (var return_one in return_one_list)
{
var all_type = return_one.GetAllType();
if (all_type != null)
{
return_type_list.Add(all_type);
}
var return_tail = return_one.GetMethodReturnTailDec();
if (return_tail != null)
{
return_tail_dec = return_tail;
}
}
}
break;
}
else if (parent is ALittleScriptClassStaticDecElement)
{
var method_dec = parent as ALittleScriptClassStaticDecElement;
var return_dec = method_dec.GetMethodReturnDec();
if (return_dec != null)
{
var return_one_list = return_dec.GetMethodReturnOneDecList();
foreach (var return_one in return_one_list)
{
var all_type = return_one.GetAllType();
if (all_type != null)
{
return_type_list.Add(all_type);
}
var return_tail = return_one.GetMethodReturnTailDec();
if (return_tail != null)
{
return_tail_dec = return_tail;
}
}
}
break;
}
else if (parent is ALittleScriptGlobalMethodDecElement)
{
var method_dec = parent as ALittleScriptGlobalMethodDecElement;
var return_dec = method_dec.GetMethodReturnDec();
if (return_dec != null)
{
var return_one_list = return_dec.GetMethodReturnOneDecList();
foreach (var return_one in return_one_list)
{
var all_type = return_one.GetAllType();
if (all_type != null)
{
return_type_list.Add(all_type);
}
var return_tail = return_one.GetMethodReturnTailDec();
if (return_tail != null)
{
return_tail_dec = return_tail;
}
}
}
break;
}
parent = parent.GetParent();
}
// 参数的类型
List <ABnfGuess> guess_list = null;
// 如果返回值只有一个函数调用
if (value_stat_list.Count == 1 && (return_type_list.Count > 1 || return_tail_dec != null))
{
var value_stat = value_stat_list[0];
var error = value_stat.GuessTypes(out guess_list);
if (error != null)
{
return(error);
}
bool has_value_tail = guess_list.Count > 0 &&
guess_list[guess_list.Count - 1] is ALittleScriptGuessReturnTail;
if (return_tail_dec == null)
{
if (has_value_tail)
{
if (guess_list.Count < return_type_list.Count - 1)
{
return(new ABnfGuessError(m_element, "return的函数调用的返回值数量超过函数定义的返回值数量"));
}
}
else
{
if (guess_list.Count != return_type_list.Count)
{
return(new ABnfGuessError(m_element, "return的函数调用的返回值数量和函数定义的返回值数量不相等"));
}
}
}
else
{
if (has_value_tail)
{
// 不用检查
}
else
{
if (guess_list.Count < return_type_list.Count)
{
return(new ABnfGuessError(m_element, "return的函数调用的返回值数量少于函数定义的返回值数量"));
}
}
}
}
else
{
if (return_tail_dec == null)
{
if (value_stat_list.Count != return_type_list.Count)
{
return(new ABnfGuessError(m_element, "return的返回值数量和函数定义的返回值数量不相等"));
}
}
else
{
if (value_stat_list.Count < return_type_list.Count)
{
return(new ABnfGuessError(m_element, "return的返回值数量少于函数定义的返回值数量"));
}
}
guess_list = new List <ABnfGuess>();
foreach (var value_stat in value_stat_list)
{
var error = ALittleScriptUtility.CalcReturnCount(value_stat, out int return_count, out _);
if (error != null)
{
return(error);
}
if (return_count != 1)
{
return(new ABnfGuessError(value_stat, "表达式必须只能是一个返回值"));
}
error = value_stat.GuessType(out ABnfGuess guess);
if (error != null)
{
return(error);
}
if (guess is ALittleScriptGuessParamTail)
{
return(new ABnfGuessError(value_stat, "return表达式不能返回\"...\""));
}
error = value_stat.GuessType(out ABnfGuess value_stat_guess);
if (error != null)
{
return(error);
}
guess_list.Add(value_stat_guess);
}
}
// 每个类型依次检查
for (int i = 0; i < guess_list.Count; ++i)
{
ALittleScriptValueStatElement target_value_stat = null;
if (i < value_stat_list.Count)
{
target_value_stat = value_stat_list[i];
}
else
{
target_value_stat = value_stat_list[0];
}
if (guess_list[i] is ALittleScriptGuessReturnTail)
{
break;
}
if (i >= return_type_list.Count)
{
break;
}
var error = return_type_list[i].GuessType(out ABnfGuess return_type_guess);
if (error != null)
{
return(error);
}
if (return_type_guess is ALittleScriptGuessReturnTail)
{
break;
}
error = ALittleScriptOp.GuessTypeEqual(return_type_guess, target_value_stat, guess_list[i], false, true);
if (error != null)
{
return(new ABnfGuessError(target_value_stat, "return的第" + (i + 1) + "个返回值数量和函数定义的返回值类型不同:" + error.GetError()));
}
}
return(null);
}
