1 files changed, 8 insertions, 3 deletions

diff --git a/src/yuescript/yue_parser.cpp b/src/yuescript/yue_parser.cpp
index 294f1e5..66ef373 100644
--- a/src/yuescript/yue_parser.cpp
+++ b/src/yuescript/yue_parser.cpp
@@ -98,6 +98,11 @@ YueParser::YueParser() {
                 return false;
         });
 
+        invalid_interpolation_error = pl::user(true_(), [](const item_t& item) {
+                throw ParserError("invalid string interpolation"sv, item.begin);
+                return false;
+        });
+
         #define ensure(patt, finally) ((patt) >> (finally) | (finally) >> cut)
 
         #define key(str) (expr(str) >> not_alpha_num)
@@ -529,9 +534,9 @@ YueParser::YueParser() {
         single_string_inner = '\\' >> set("'\\") | not_('\'') >> any_char;
         SingleString = '\'' >> *single_string_inner >> '\'';
 
-        interp = "#{" >> space >> Exp >> space >> '}';
-        double_string_plain = '\\' >> set("\"\\") | not_('"') >> any_char;
-        DoubleStringInner = +(not_(interp) >> double_string_plain);
+        interp = "#{" >> space >> (Exp >> space >> '}' | invalid_interpolation_error);
+        double_string_plain = '\\' >> set("\"\\#") | not_('"') >> any_char;
+        DoubleStringInner = +(not_("#{") >> double_string_plain);
         DoubleStringContent = DoubleStringInner | interp;
         DoubleString = '"' >> Seperator >> *DoubleStringContent >> '"';
         String = DoubleString | SingleString | LuaString;