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新增了脚本节点对于集合对象[]下标/key取值的语法支持。修复了加载项目文件时无法加载脚本节点变量名称的问题

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This commit is contained in:
fengjiayi
2025-03-15 14:02:12 +08:00
parent 1e09675ef1
commit d8f4a5a2c2
6 changed files with 147 additions and 30 deletions
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4
Serein.Script/Node/CollectionIndexNode.cs
View File

@@ -11,9 +11,11 @@ namespace Serein.Script.Node
/// </summary>
public class CollectionIndexNode : ASTNode
{
public ASTNode TargetValue { get; }
public ASTNode IndexValue { get; }
public CollectionIndexNode(ASTNode indexValue)
public CollectionIndexNode(ASTNode collectionValue,ASTNode indexValue)
{
this.TargetValue = collectionValue;
this.IndexValue = indexValue;
}
}

110
Serein.Script/SereinScriptInterpreter.cs
View File

@@ -3,7 +3,9 @@ using Serein.Library;
using Serein.Library.Api;
using Serein.Library.Utils;
using Serein.Script.Node;
using System.ComponentModel.Design;
using System.Reflection;
using System.Reflection.Metadata.Ecma335;
using System.Runtime.CompilerServices;
using System.Xml.Linq;
@@ -21,12 +23,15 @@ namespace Serein.Script
}
}
/// <summary>
/// 脚本运行上下文
/// </summary>
public interface IScriptInvokeContext
{
IDynamicContext FlowContext { get; }
/// <summary>
/// 是否该退出了
/// </summary>
@@ -35,7 +40,7 @@ namespace Serein.Script
/// <summary>
/// 是否严格检查 Null 值 （禁止使用 Null）
/// </summary>
bool IsCheckNullValue { get; }
bool IsCheckNullValue { get; set; }
/// <summary>
/// 获取变量的值
@@ -56,7 +61,7 @@ namespace Serein.Script
/// 结束调用
/// </summary>
/// <returns></returns>
bool Exit();
void OnExit();
}
@@ -73,11 +78,13 @@ namespace Serein.Script
/// 定义的变量
/// </summary>
private Dictionary<string, object> _variables = new Dictionary<string, object>();
private CancellationTokenSource _tokenSource = new CancellationTokenSource();
/// <summary>
/// 是否该退出了
/// </summary>
public bool IsReturn { get; set; }
public bool IsReturn => _tokenSource.IsCancellationRequested;
/// <summary>
/// 是否严格检查 Null 值 （禁止使用 Null）
@@ -104,7 +111,7 @@ namespace Serein.Script
bool IScriptInvokeContext.Exit()
void IScriptInvokeContext.OnExit()
{
// 清理脚本中加载的非托管资源
foreach (var nodeObj in _variables.Values)
@@ -121,8 +128,8 @@ namespace Serein.Script
}
}
_tokenSource.Cancel();
_variables.Clear();
return true ;
}
}
@@ -213,6 +220,7 @@ namespace Serein.Script
private async Task<object?> ExecutionProgramNodeAsync(IScriptInvokeContext context, ProgramNode programNode)
{
// 加载变量
// 遍历 ProgramNode 中的所有语句并执行它们
foreach (var statement in programNode.Statements)
@@ -290,8 +298,13 @@ namespace Serein.Script
/// <exception cref="Exception"></exception>
private async Task ExectutionWhileNodeAsync(IScriptInvokeContext context, WhileNode whileNode)
{
while (true)
{
if (context.IsReturn) // 停止流程
{
return;
}
var result = await EvaluateAsync(context, whileNode.Condition) ?? throw new SereinSciptException(whileNode, $"条件语句返回了 null");
if (result is not bool condition)
{
@@ -316,7 +329,11 @@ namespace Serein.Script
private async Task ExecutionAssignmentNodeAsync(IScriptInvokeContext context, AssignmentNode assignmentNode)
{
var tmp = await EvaluateAsync(context, assignmentNode.Value);
context.SetVarValue(assignmentNode.Variable, tmp);
if(tmp is not null)
{
context.SetVarValue(assignmentNode.Variable, tmp);
}
}
private async Task<object> InterpretFunctionCallAsync(IScriptInvokeContext context, FunctionCallNode functionCallNode)
{
@@ -378,6 +395,7 @@ namespace Serein.Script
switch (node)
{
case ProgramNode programNode: // AST树入口
var scritResult = await ExecutionProgramNodeAsync(context, programNode);
return scritResult; // 遍历 ProgramNode 中的所有语句并执行它们
case ClassTypeDefinitionNode classTypeDefinitionNode: // 定义类型
@@ -463,16 +481,18 @@ namespace Serein.Script
throw new SereinSciptException(objectInstantiationNode, $"使用了未定义的类型\"{objectInstantiationNode.TypeName}\"");
}
case FunctionCallNode callNode:
case FunctionCallNode callNode: // 调用方法
return await InterpretFunctionCallAsync(context, callNode); // 调用方法返回函数的返回值
case MemberFunctionCallNode memberFunctionCallNode:
case MemberFunctionCallNode memberFunctionCallNode: // 对象方法调用
return await CallMemberFunction(context, memberFunctionCallNode);
case MemberAccessNode memberAccessNode:
case MemberAccessNode memberAccessNode: // 对象成员访问
return await GetValue(context, memberAccessNode);
case ReturnNode returnNode: //
case CollectionIndexNode collectionIndexNode:
return await GetCollectionValue(context, collectionIndexNode);
case ReturnNode returnNode: // 返回内容
return await EvaluateAsync(context, returnNode.Value); // 直接返回响应的内容
default:
throw new SereinSciptException(node, "解释器 EvaluateAsync() 未实现节点行为");
throw new SereinSciptException(node, $"解释器 EvaluateAsync() 未实现{node}节点行为");
}
}
@@ -593,6 +613,74 @@ namespace Serein.Script
return lastProperty.GetValue(target);
}
}
/// <summary>
/// 获取集合中的成员
/// </summary>
/// <param name="memberAccessNode"></param>
/// <returns></returns>
/// <exception cref="SereinSciptException"></exception>
public async Task<object?> GetCollectionValue(IScriptInvokeContext context, CollectionIndexNode collectionIndexNode)
{
var target = await EvaluateAsync(context, collectionIndexNode.TargetValue); // 获取对象
if (target is null)
{
throw new ArgumentNullException($"解析{collectionIndexNode}节点时，TargetValue返回空。");
}
// 解析数组/集合名与索引部分
var targetType = target.GetType(); // 目标对象的类型
#region 处理键值对
if (targetType.IsGenericType && targetType.GetGenericTypeDefinition() == typeof(Dictionary<,>))
{
// 目标是键值对
var method = targetType.GetMethod("get_Item", BindingFlags.Public | BindingFlags.Instance);
if (method is not null)
{
var key = await EvaluateAsync(context, collectionIndexNode.IndexValue); // 获取索引值;
var result = method.Invoke(target, new object[] { key });
return result;
}
}
#endregion
#region 处理集合对象
else
{
var indexValue = await EvaluateAsync(context, collectionIndexNode.IndexValue); // 获取索引值
object? result;
if (indexValue is int index)
{
// 获取数组或集合对象
// 访问数组或集合中的指定索引
if (target is Array array)
{
if (index < 0 || index >= array.Length)
{
throw new ArgumentException($"解析{collectionIndexNode}节点时，数组下标越界。");
}
result = array.GetValue(index);
return result;
}
else if (target is IList<object> list)
{
if (index < 0 || index >= list.Count)
{
throw new ArgumentException($"解析{collectionIndexNode}节点时，数组下标越界。");
}
result = list[index];
return result;
}
else
{
throw new ArgumentException($"解析{collectionIndexNode}节点时，左值并非有效集合。");
}
}
}
#endregion
throw new ArgumentException($"解析{collectionIndexNode}节点时，左值并非有效集合。");
}
/// <summary>
/// 缓存method委托

24
Serein.Script/SereinScriptParser.cs
View File

@@ -127,6 +127,11 @@ namespace Serein.Script
// 对象成员的获取
return ParseMemberAccessOrAssignment();
}
else if (_tempToken.Type == TokenType.SquareBracketsLeft)
{
// 数组 index; 字典 key obj.Member[xxx];
return ParseCollectionIndex();
}
else
{
// 不是函数调用，是变量赋值或其他
@@ -292,10 +297,13 @@ namespace Serein.Script
public ASTNode ParseCollectionIndex()
{
string functionName = _currentToken.Value.ToString();
_currentToken = _lexer.NextToken(); // consume identifier
var identifierNode = new IdentifierNode(_currentToken.Value.ToString()).SetTokenInfo(_currentToken);
if (_currentToken.Type != TokenType.ParenthesisLeft)
string collectionName = _currentToken.Value.ToString();
//_lexer.NextToken(); // consume "["
_currentToken = _lexer.NextToken(); // consume identifier
// ParenthesisLeft
if (_currentToken.Type != TokenType.SquareBracketsLeft)
throw new Exception("Expected '[' after function name");
_currentToken = _lexer.NextToken(); // consume "["
@@ -303,7 +311,7 @@ namespace Serein.Script
ASTNode indexValue = Expression(); // get index value
_currentToken = _lexer.NextToken(); // consume "]"
return new CollectionIndexNode(indexValue).SetTokenInfo(_currentToken);
return new CollectionIndexNode(identifierNode,indexValue).SetTokenInfo(_currentToken);
}
/// <summary>
@@ -631,6 +639,14 @@ namespace Serein.Script
{
return ParseMemberAccessOrAssignment();
}
// 数组 index; 字典 key obj.Member[xxx];
if (_identifierPeekToken.Type == TokenType.SquareBracketsLeft)
{
return ParseCollectionIndex();
}
_currentToken = _lexer.NextToken(); // 消耗标识符
return new IdentifierNode(identifier.ToString()).SetTokenInfo(_currentToken);
}