force strings to be finished

README.md

@@ -30,6 +30,7 @@ advantages, including:
 * Modern C++14 API (no macros, strongly typed enums, lambdas, ranges etc.)
 * C++14 lambdas can be used as commands (including captures and type inference)
 * Error handling including recovery (protected call system similar to Lua)
+* Stricter parsing (strings cannot be left unfinished)
 * Loop control statements (`break` and `continue`)
 * No manual memory mangement, values manage themselves
 * Clean codebase that is easy to read and contribute to
@@ -38,6 +39,7 @@ advantages, including:
 
 There are some features that are a work in progress and will come later:
 
+* More helpful debug information (proper line infos at both parse and run time)
 * A degree of thread safety (see below)
 * Custom allocator support (control over how heap memory is allocated)
 * Coroutines

src/cs_gen.cc

@@ -74,6 +74,7 @@ static ostd::ConstCharRange cs_parse_str(ostd::ConstCharRange str) {
 }
 
 ostd::ConstCharRange GenState::get_str() {
+    char const *ln = source;
     char const *beg = source + 1;
     source = beg;
     for (; current(); next_char()) {
@@ -92,9 +93,10 @@ ostd::ConstCharRange GenState::get_str() {
     }
 done:
     auto ret = ostd::ConstCharRange(beg, source);
-    if (current() == '\"') {
-        next_char();
+    if (current() != '\"') {
+        cs_error_line(*this, ln, "unfinished string '%s'", ln);
     }
+    next_char();
     return ret;
 }