[Feat] 支持 += -=等运算符！

src/Ast/astBase.hpp

@@ -223,6 +223,12 @@ namespace Fig::Ast
 
         // 赋值表达式
         Assign,         // =
+        PlusAssign,     // +=
+        MinusAssign,    // -=
+        AsteriskAssign, // *=
+        SlashAssign,    // /=
+        PercentAssign,  // %=
+        CaretAssign,    // ^=
         // Walrus, // :=
     };
 
@@ -255,6 +261,13 @@ namespace Fig::Ast
         Operator::ShiftLeft,
         Operator::ShiftRight,
 
+        Operator::Assign,
+        Operator::PlusAssign,
+        Operator::MinusAssign,
+        Operator::AsteriskAssign,
+        Operator::SlashAssign,
+        Operator::CaretAssign
+
         // Operator::Walrus,
         // Operator::Dot
     };
@@ -297,6 +310,12 @@ namespace Fig::Ast
 
         // 赋值表达式
         {TokenType::Assign, Operator::Assign},
+        {TokenType::PlusEqual, Operator::PlusAssign},
+        {TokenType::MinusEqual, Operator::MinusAssign},
+        {TokenType::AsteriskEqual, Operator::AsteriskAssign},
+        {TokenType::SlashEqual, Operator::SlashAssign},
+        {TokenType::PercentEqual, Operator::PercentAssign},
+        {TokenType::CaretEqual, Operator::CaretAssign},
         // {TokenType::Walrus, Operator::Walrus},
     }; // :=
 

src/Evaluator/evaluator.cpp

@@ -289,12 +289,55 @@ namespace Fig
                 ObjectPtr rhs = eval(rexp, ctx);
                 return std::make_shared<Object>(shift_right(*lhs, *rhs));
             }
+
             case Operator::Assign: {
                 LvObject lv = evalLv(lexp, ctx);
                 ObjectPtr rhs = eval(rexp, ctx);
                 lv.set(rhs);
                 return rhs;
             }
+            case Operator::PlusAssign: {
+                LvObject lv = evalLv(lexp, ctx);
+                ObjectPtr rhs = eval(rexp, ctx);
+                lv.set(std::make_shared<Object>(
+                    *(lv.get()) + *rhs
+                ));
+                return rhs;
+            }
+            case Operator::MinusAssign: {
+                LvObject lv = evalLv(lexp, ctx);
+                ObjectPtr rhs = eval(rexp, ctx);
+                lv.set(std::make_shared<Object>(
+                    *(lv.get()) - *rhs));
+                return rhs;
+            }
+            case Operator::AsteriskAssign: {
+                LvObject lv = evalLv(lexp, ctx);
+                ObjectPtr rhs = eval(rexp, ctx);
+                lv.set(std::make_shared<Object>(
+                    *(lv.get()) * (*rhs)));
+                return rhs;
+            }
+            case Operator::SlashAssign: {
+                LvObject lv = evalLv(lexp, ctx);
+                ObjectPtr rhs = eval(rexp, ctx);
+                lv.set(std::make_shared<Object>(
+                    *(lv.get()) / *rhs));
+                return rhs;
+            }
+            case Operator::PercentAssign: {
+                LvObject lv = evalLv(lexp, ctx);
+                ObjectPtr rhs = eval(rexp, ctx);
+                lv.set(std::make_shared<Object>(
+                    *(lv.get()) / *rhs));
+                return rhs;
+            }
+            // case Operator::CaretAssign: {
+            //     LvObject lv = evalLv(lexp, ctx);
+            //     ObjectPtr rhs = eval(rexp, ctx);
+            //     lv.set(std::make_shared<Object>(
+            //         *(lv.get()) ^ *rhs));
+            // }
             default:
                 throw EvaluatorError(u8"UnsupportedOp", std::format("Unsupport operator '{}' for binary", magic_enum::enum_name(op)), bin);
         }

src/Parser/parser.cpp

@@ -35,6 +35,12 @@ namespace Fig
         {Ast::Operator::ShiftRight, {15, 16}},
 
         {Ast::Operator::Assign, {2, 1}}, // 右结合
+        {Ast::Operator::PlusAssign, {2, 1}},
+        {Ast::Operator::MinusAssign, {2, 1}},
+        {Ast::Operator::SlashAssign, {2, 1}},
+        {Ast::Operator::AsteriskAssign, {2, 1}},
+        {Ast::Operator::PercentAssign, {2, 1}},
+        {Ast::Operator::CaretAssign, {2, 1}},
 
         // 海象运算符
         // {Ast::Operator::Walrus, {2, 1}}, // 右结合