3 files changed, 141 insertions, 6 deletions

diff --git a/spec/inputs/destructure.yue b/spec/inputs/destructure.yue
index 403923a..d161fd8 100644
--- a/spec/inputs/destructure.yue
+++ b/spec/inputs/destructure.yue
@@ -214,5 +214,15 @@ do
         tb = {}
         <[a + b]>: v1, [c!]: v2 = tb
 
+do
+        {a: {:<add> = addFunc}, b: {<[fieldName]>: field = 123}} = tb
+        {<"abc">: meta_field = "def", <[[any string]]>: abc = 123, <'str'>: def = {}} = tb
+
+        switch tb
+                when {a: {:<add> = addFunc}, b: {<[fieldName]>: field = 123}}
+                        print add, field
+        switch tb
+                when {c: {<"abc">: meta_field = "def"}, <[[any string]]>: {d: abc = 123}, <'str'>: {e: def = {}}}
+                        print meta_field, abc, def
 nil
 
diff --git a/spec/outputs/destructure.lua b/spec/outputs/destructure.lua
index 10ad2d0..f40a658 100644
--- a/spec/outputs/destructure.lua
+++ b/spec/outputs/destructure.lua
@@ -503,4 +503,109 @@ do
                 v1 = _obj_1[_tmp_1]
         end
 end
+do
+        local add, field
+        do
+                local _obj_0 = tb
+                add, field = getmetatable(_obj_0.a).__add, getmetatable(_obj_0.b)[fieldName]
+                if add == nil then
+                        add = addFunc
+                end
+                if field == nil then
+                        field = 123
+                end
+        end
+        local meta_field, abc, def
+        do
+                local _obj_0 = getmetatable(tb)
+                meta_field, abc, def = _obj_0["abc"], _obj_0[ [[any string]]], _obj_0['str']
+                if meta_field == nil then
+                        meta_field = "def"
+                end
+                if abc == nil then
+                        abc = 123
+                end
+                if def == nil then
+                        def = { }
+                end
+        end
+        do
+                local _exp_0 = tb
+                local _tab_0 = "table" == type(_exp_0)
+                if _tab_0 then
+                        do
+                                local _obj_0 = _exp_0.a
+                                if _obj_0 ~= nil then
+                                        do
+                                                local _obj_1 = getmetatable(_obj_0)
+                                                if _obj_1 ~= nil then
+                                                        add = _obj_1.__add
+                                                end
+                                        end
+                                end
+                        end
+                        do
+                                local _obj_0 = _exp_0.b
+                                if _obj_0 ~= nil then
+                                        do
+                                                local _obj_1 = getmetatable(_obj_0)
+                                                if _obj_1 ~= nil then
+                                                        field = _obj_1[fieldName]
+                                                end
+                                        end
+                                end
+                        end
+                        if add == nil then
+                                add = addFunc
+                        end
+                        if field == nil then
+                                field = 123
+                        end
+                        print(add, field)
+                end
+        end
+        do
+                local _exp_0 = tb
+                local _tab_0 = "table" == type(_exp_0)
+                if _tab_0 then
+                        local _obj_0 = _exp_0
+                        do
+                                local _obj_1 = _obj_0.c
+                                if _obj_1 ~= nil then
+                                        do
+                                                local _obj_2 = getmetatable(_obj_1)
+                                                if _obj_2 ~= nil then
+                                                        meta_field = _obj_2["abc"]
+                                                end
+                                        end
+                                end
+                        end
+                        if meta_field == nil then
+                                meta_field = "def"
+                        end
+                        do
+                                local _obj_1 = getmetatable(_obj_0)
+                                do
+                                        local _obj_2 = _obj_1[ [[any string]]]
+                                        if _obj_2 ~= nil then
+                                                abc = _obj_2.d
+                                        end
+                                end
+                                do
+                                        local _obj_2 = _obj_1['str']
+                                        if _obj_2 ~= nil then
+                                                def = _obj_2.e
+                                        end
+                                end
+                                if abc == nil then
+                                        abc = 123
+                                end
+                                if def == nil then
+                                        def = { }
+                                end
+                        end
+                        print(meta_field, abc, def)
+                end
+        end
+end
 return nil
diff --git a/src/yuescript/yue_compiler.cpp b/src/yuescript/yue_compiler.cpp
index c359e02..9d84f43 100644
--- a/src/yuescript/yue_compiler.cpp
+++ b/src/yuescript/yue_compiler.cpp
@@ -2109,6 +2109,11 @@ private:
                                         auto item = value->item.get();
                                         if (ast_is<simple_table_t>(item) || item->getByPath<TableLit_t>()) {
                                                 auto subPairs = destructFromExp(pair, optional);
+                                                if (!subPairs.empty()) {
+                                                        if (defVal) {
+                                                                throw std::logic_error(_info.errorMessage("default value is not supported here"sv, defVal));
+                                                        }
+                                                }
                                                 for (auto& p : subPairs) {
                                                         if (sep) p.structure->items.push_front(sep);
                                                         p.structure->items.push_front(
@@ -2171,14 +2176,20 @@ private:
                                                         keyIndex = key;
                                                 } else if (auto key = np->key.as<String_t>()) {
                                                         keyIndex = newExp(key, np->key).get();
-                                                } else
+                                                } else {
                                                         throw std::logic_error(_info.errorMessage("unsupported key for destructuring"sv, np));
+                                                }
                                         }
                                         if (auto exp = np->value.as<Exp_t>()) {
                                                 if (!isAssignable(exp)) throw std::logic_error(_info.errorMessage("can't do destructure value"sv, exp));
                                                 auto item = singleValueFrom(exp)->item.get();
                                                 if (ast_is<simple_table_t>(item) || item->getByPath<TableLit_t>()) {
                                                         auto subPairs = destructFromExp(exp, optional);
+                                                        if (!subPairs.empty()) {
+                                                                if (defVal) {
+                                                                        throw std::logic_error(_info.errorMessage("default value is not supported here"sv, defVal));
+                                                                }
+                                                        }
                                                         for (auto& p : subPairs) {
                                                                 if (keyIndex) {
                                                                         if (sep) p.structure->items.push_front(sep);
@@ -2199,6 +2210,11 @@ private:
                                         }
                                         if (np->value.is<TableBlock_t>()) {
                                                 auto subPairs = destructFromExp(np->value, optional);
+                                                if (!subPairs.empty()) {
+                                                        if (defVal) {
+                                                                throw std::logic_error(_info.errorMessage("default value is not supported here"sv, defVal));
+                                                        }
+                                                }
                                                 for (auto& p : subPairs) {
                                                         if (keyIndex) {
                                                                 if (sep) p.structure->items.push_front(sep);
@@ -2253,6 +2269,7 @@ private:
                                                                 newPair->key.set(newKey);
                                                                 break;
                                                         }
+                                                        case id<String_t>():
                                                         case id<Exp_t>():
                                                                 newPair->key.set(mp->key);
                                                                 break;
@@ -5220,7 +5237,7 @@ private:
                                 case id<variable_pair_def_t>(): {
                                         if (auto pair = ast_cast<variable_pair_def_t>(item)) {
                                                 if (pair->defVal) {
-                                                        throw std::logic_error(_info.errorMessage("invalid default value"sv, pair->defVal));
+                                                        throw std::logic_error(_info.errorMessage("invalid default value here"sv, pair->defVal));
                                                 }
                                                 item = pair->pair.get();
                                         }
@@ -5234,7 +5251,7 @@ private:
                                 case id<normal_pair_def_t>(): {
                                         if (auto pair = ast_cast<normal_pair_def_t>(item)) {
                                                 if (pair->defVal) {
-                                                        throw std::logic_error(_info.errorMessage("invalid default value"sv, pair->defVal));
+                                                        throw std::logic_error(_info.errorMessage("invalid default value here"sv, pair->defVal));
                                                 }
                                                 item = pair->pair.get();
                                         }
@@ -5286,7 +5303,7 @@ private:
                                         auto current = item;
                                         if (auto pair = ast_cast<normal_def_t>(item)) {
                                                 if (pair->defVal) {
-                                                        throw std::logic_error(_info.errorMessage("invalid default value"sv, pair->defVal));
+                                                        throw std::logic_error(_info.errorMessage("invalid default value here"sv, pair->defVal));
                                                 }
                                                 item = pair->item.get();
                                         }
@@ -5336,7 +5353,7 @@ private:
                                 case id<meta_variable_pair_def_t>(): {
                                         if (auto pair = ast_cast<meta_variable_pair_def_t>(item)) {
                                                 if (pair->defVal) {
-                                                        throw std::logic_error(_info.errorMessage("invalid default value"sv, pair->defVal));
+                                                        throw std::logic_error(_info.errorMessage("invalid default value here"sv, pair->defVal));
                                                 }
                                                 item = pair->pair.get();
                                         }
@@ -5350,7 +5367,7 @@ private:
                                 case id<meta_normal_pair_def_t>(): {
                                         if (auto pair = ast_cast<meta_normal_pair_def_t>(item)) {
                                                 if (pair->defVal) {
-                                                        throw std::logic_error(_info.errorMessage("invalid default value"sv, pair->defVal));
+                                                        throw std::logic_error(_info.errorMessage("invalid default value here"sv, pair->defVal));
                                                 }
                                                 item = pair->pair.get();
                                         }
@@ -5373,6 +5390,9 @@ private:
                                                         chainValue->items.push_back(key);
                                                         break;
                                                 }
+                                                case id<String_t>():
+                                                        chainValue->items.push_back(key);
+                                                        break;
                                                 default: YUEE("AST node mismatch", key); break;
                                         }
                                         auto assign = assignment->action.to<Assign_t>();