refactor and update readme and changelog.

1 files changed, 6 insertions, 3 deletions

diff --git a/src/yuescript/yue_compiler.cpp b/src/yuescript/yue_compiler.cpp
index 4072974..f5436d1 100644
--- a/src/yuescript/yue_compiler.cpp
+++ b/src/yuescript/yue_compiler.cpp
@@ -59,7 +59,7 @@ namespace yue {
 
 typedef std::list<std::string> str_list;
 
-const std::string_view version = "0.15.11"sv;
+const std::string_view version = "0.15.12"sv;
 const std::string_view extension = "yue"sv;
 
 class YueCompilerImpl {
@@ -3769,7 +3769,7 @@ private:
                 if (!_enableReturn.top()) {
                         ast_node* target = returnNode->valueList.get();
                         if (!target) target = returnNode;
-                        throw std::logic_error(_info.errorMessage("illegal return statement here"sv, target));
+                        throw std::logic_error(_info.errorMessage("can not mix use of return and export statements in module scope"sv, target));
                 }
                 if (auto valueList = returnNode->valueList.as<ExpListLow_t>()) {
                         if (valueList->exprs.size() == 1) {
@@ -8008,8 +8008,11 @@ private:
 
         void transformChainAssign(ChainAssign_t* chainAssign, str_list& out) {
                 auto x = chainAssign;
-                str_list temp;
                 auto value = chainAssign->assign->values.front();
+                if (chainAssign->assign->values.size() != 1) {
+                        throw std::logic_error(_info.errorMessage("only one right value expected"sv, value));
+                }
+                str_list temp;
                 bool constVal = false;
                 if (auto simpleVal = simpleSingleValueFrom(value)) {
                         constVal = ast_is<const_value_t, Num_t>(simpleVal->value);