5 files changed, 14 insertions, 5 deletions

diff --git a/spec/inputs/string.yue b/spec/inputs/string.yue
index 201e60d..f91383e 100644
--- a/spec/inputs/string.yue
+++ b/spec/inputs/string.yue
@@ -51,6 +51,7 @@ d = "#{hello world}"
 e = "#{1} #{2} #{3}"
 
 f = [[hello #{world} world]]
+g = "\#{hello world}"
 
 --
 
diff --git a/spec/outputs/string.lua b/spec/outputs/string.lua
index 87ecf2c..febea62 100644
--- a/spec/outputs/string.lua
+++ b/spec/outputs/string.lua
@@ -29,6 +29,7 @@ local c = "hello " .. tostring(5 + 1)
 local d = tostring(hello(world))
 local e = tostring(1) .. " " .. tostring(2) .. " " .. tostring(3)
 local f = [[hello #{world} world]]
+local g = "#{hello world}"
 a = 'hello #{hello} hello'
 b = '#{hello} hello'
 c = 'hello #{hello}'
diff --git a/src/yuescript/yue_compiler.cpp b/src/yuescript/yue_compiler.cpp
index 3dc8e19..3353a2a 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 = "0.17.4"sv;
+const std::string_view version = "0.17.5"sv;
 const std::string_view extension = "yue"sv;
 
 class CompileError : public std::logic_error {
@@ -6926,8 +6926,9 @@ private:
                         switch (content->get_id()) {
                                 case id<DoubleStringInner_t>(): {
                                         auto str = _parser.toString(content);
-                                        Utils::replace(str, "\r\n"sv, "\n");
+                                        Utils::replace(str, "\r\n"sv, "\n"sv);
                                         Utils::replace(str, "\n"sv, "\\n"sv);
+                                        Utils::replace(str, "\\#"sv, "#"sv);
                                         temp.push_back('\"' + str + '\"');
                                         break;
                                 }
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;
diff --git a/src/yuescript/yue_parser.h b/src/yuescript/yue_parser.h
index 9b4adae..ac6524d 100644
--- a/src/yuescript/yue_parser.h
+++ b/src/yuescript/yue_parser.h
@@ -137,6 +137,7 @@ private:
         NONE_AST_RULE(braces_expression_error);
         NONE_AST_RULE(brackets_expression_error);
         NONE_AST_RULE(export_expression_error);
+        NONE_AST_RULE(invalid_interpolation_error);
 
         NONE_AST_RULE(inc_exp_level);
         NONE_AST_RULE(dec_exp_level);