private async Task CreateFunctionCall()
{
var functionName = MemoryStack.Pop();
while (functionName is ReferenceValue referenceFunction)
{
functionName = referenceFunction.ReferenceTarget;
}
ScopeValue functionBody;
if (functionName is ScopeValue directBody)
{
functionBody = directBody;
}
else
{
if (!(functionName is IStringConverter stringConverter))
{
throw new RuntimeException(_callStack, $"Unable to call scene: name {functionName} is not string value");
}
var function = ActiveScope?.FindVariable(stringConverter.ConvertToString(ActiveLanguage), true, VariableSearchMode.All);
if (function == null || !(function.ReferenceTarget is ScopeValue scopeValue))
{
throw new RuntimeException(_callStack, $"Unable to call function: expected function {stringConverter.ConvertToString(ActiveLanguage)} not existed in current scope");
}
functionBody = scopeValue;
}
// 生成形参
var paramCount = ((IntegerValue)MemoryStack.Pop()).value;
for (var i = -1; ++i < paramCount;)
{
var paramName = PopString();
if (string.IsNullOrEmpty(paramName))
{
throw new RuntimeException(_callStack, $"Unable to call {functionName}: expected parameter name {paramName} is not string value");
}
functionBody.LocalVariables.Add(paramName, new ReferenceValue {
ReferenceTarget = MemoryStack.Pop()
});
}
// 切换作用域
_historyScope.Push(ActiveScope);
ActiveScope = functionBody;
// 重定向执行位置
Script = await ScriptFile.Load(ActiveScope.scriptId);
Script.MoveTo(ActiveScope.entrance);
await Script.UseTranslation(ActiveLanguage);
_callStack.Push(Script);
}
private void LoadVariable(VariableSearchMode mode)
{
string name;
if (MemoryStack.Peek() is ReferenceValue referenceValue)
{
name = PopString(referenceValue.ReferenceTarget);
MemoryStack.Pop();
}
else
{
name = PopString();
}
if (name.Equals("true", StringComparison.InvariantCultureIgnoreCase))
{
MemoryStack.Push(new BooleanValue {
value = true
});
}
else if (name.Equals("false", StringComparison.InvariantCultureIgnoreCase))
{
MemoryStack.Push(new BooleanValue {
value = false
});
}
else
{
var target = ActiveScope?.FindVariable(name, true, mode);
if (target == null)
{
LoadNull();
}
else
{
MemoryStack.Push(target.ReferenceTarget);
}
}
}