3 files changed, 8 insertions, 2 deletions

diff --git a/src/yuescript/yue_compiler.cpp b/src/yuescript/yue_compiler.cpp
index c6cc4ba..bb715d2 100644
--- a/src/yuescript/yue_compiler.cpp
+++ b/src/yuescript/yue_compiler.cpp
@@ -72,7 +72,7 @@ static std::unordered_set<std::string> Metamethods = {
         "close"s // Lua 5.4
 };
 
-const std::string_view version = "0.17.6"sv;
+const std::string_view version = "0.17.7"sv;
 const std::string_view extension = "yue"sv;
 
 class CompileError : public std::logic_error {
diff --git a/src/yuescript/yue_parser.cpp b/src/yuescript/yue_parser.cpp
index 66ef373..f9dc33a 100644
--- a/src/yuescript/yue_parser.cpp
+++ b/src/yuescript/yue_parser.cpp
@@ -103,6 +103,11 @@ YueParser::YueParser() {
                 return false;
         });
 
+        confusing_unary_not_error = pl::user(true_(), [](const item_t& item) {
+                throw ParserError("deprecated unary operator not"sv, item.begin);
+                return false;
+        });
+
         #define ensure(patt, finally) ((patt) >> (finally) | (finally) >> cut)
 
         #define key(str) (expr(str) >> not_alpha_num)
@@ -464,7 +469,7 @@ YueParser::YueParser() {
         NotIn = true_();
         InRange = ('(' >> InRangeOpen | '[' >> InRangeClose) >> space >> Exp >> space >> ',' >> space >> Exp >> space >> (')' >> InRangeOpen | ']' >> InRangeClose);
         InDiscrete = '{' >> Seperator >> space >> exp_not_tab >> *(space >> ',' >> space >> exp_not_tab) >> space >> '}';
-        In = -(key("not") >> NotIn >> space) >> key("in") >> space >> (InRange | InDiscrete | Exp);
+        In = -(key("not") >> NotIn >> space) >> key("in") >> space >> (InRange | InDiscrete | key("not") >> confusing_unary_not_error | Exp);
 
         UnaryOperator =
                 '-' >> not_(set(">=") | space_one) |
diff --git a/src/yuescript/yue_parser.h b/src/yuescript/yue_parser.h
index ac6524d..dd5e253 100644
--- a/src/yuescript/yue_parser.h
+++ b/src/yuescript/yue_parser.h
@@ -138,6 +138,7 @@ private:
         NONE_AST_RULE(brackets_expression_error);
         NONE_AST_RULE(export_expression_error);
         NONE_AST_RULE(invalid_interpolation_error);
+        NONE_AST_RULE(confusing_unary_not_error);
 
         NONE_AST_RULE(inc_exp_level);
         NONE_AST_RULE(dec_exp_level);