feat: 增加了analyzer, compiler不再分析并且报错, 只生产 bytecode, analyzer作为前端结束最后一道防线检查代码，同时引入一个简单的LSP

src/Sema/Analyzer.hpp

@@ -0,0 +1,70 @@
+/*!
+    @file src/Sema/Analyzer.hpp
+    @brief 前端类型检查器定义
+    @author PuqiAR (im@puqiar.top)
+    @date 2026-02-23
+*/
+
+#pragma once
+
+#include <Sema/Environment.hpp>
+#include <Sema/Type.hpp>
+
+
+#include <Ast/Ast.hpp>
+#include <Deps/Deps.hpp>
+
+
+namespace Fig
+{
+    class Analyzer
+    {
+    private:
+        Environment env;
+        SourceManager &manager;
+
+        SourceLocation makeSourceLocation(AstNode *ast, std::source_location loc = std::source_location::current())
+        {
+            return SourceLocation(
+                ast->location.sp,
+                ast->location.fileName,
+                "[internal analyzer]",
+                loc.function_name()
+            );
+        }
+
+        bool isValidLvalue(Expr *expr)
+        {
+            if (expr->type == AstType::IdentiExpr)
+            {
+                return true;
+            }
+            if (expr->type == AstType::InfixExpr)
+            {
+                InfixExpr *infix = static_cast<InfixExpr *>(expr);
+                if (infix->op == BinaryOperator::MemberAccess)
+                {
+                    return true;
+                }
+            }
+            if (expr->type == AstType::IndexExpr)
+            {
+                return true;
+            }
+            return false;
+        }
+
+        Result<void, Error> analyzeVarDecl(VarDecl *);
+        Result<void, Error> analyzeIfStmt(IfStmt *);
+        
+        Result<void, Error> analyzeIdentiExpr(IdentiExpr *);
+        Result<void, Error> analyzeInfixExpr(InfixExpr *);
+
+        Result<void, Error> analyzeStmt(Stmt *);
+        Result<void, Error> analyzeExpr(Expr *);
+    public:
+        Result<void, Error> Analyze(Program *);
+
+        Analyzer(SourceManager &_manager) : manager(_manager) {}
+    };
+}; // namespace Fig