Add a std::string data member, and an override of what() to parser_er…

…ror, to ensure that the messge is preserved exactly when translating exceptions in failed lexer parsing. See #202.
boostorg · Nov 29, 2024 · 1421592 · 1421592
1 parent 092a761
commit 1421592
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Showing 2 changed files with 6 additions and 3 deletions.
diff --git a/include/boost/parser/error_handling_fwd.hpp b/include/boost/parser/error_handling_fwd.hpp
@@ -24,10 +24,13 @@ namespace boost { namespace parser {
     template<typename Iter>
     struct parse_error : std::runtime_error
     {
-        parse_error(Iter it, std::string const & msg) :
-            runtime_error(msg), iter(it)
+        parse_error(Iter it, std::string msg) :
+            runtime_error(""), message(msg), iter(it)
         {}
 
+        char const * what() const noexcept override { return message.c_str(); }
+
+        std::string message;
         Iter iter;
     };
 

diff --git a/include/boost/parser/parser.hpp b/include/boost/parser/parser.hpp
@@ -2329,7 +2329,7 @@ namespace boost { namespace parser {
                 auto const underlying_first = e.iter.range_begin();
                 auto const underlying_curr = e.iter->underlying_position();
                 auto const underlying_last = e.iter.range_end();
-                parse_error underlying_error{underlying_curr, e.what()};
+                parse_error underlying_error{underlying_curr, e.message()};
                 return error_handler(
                            underlying_first,
                            underlying_last,