Closes #33

core/dbc_parser.h

@@ -37,7 +37,9 @@ struct DbcParserOptions {
  * Attribute statements support multiline fields and quoted strings, ending at
  * a semicolon outside quoted text. Diagnostics use the first physical line.
  *
- * Reports unsupported statements as warnings. Invalid multiplexing is
+ * Rejects all SIG_VALTYPE_ declarations, including type 0, with
+ * UnsupportedSignalType errors; explicit signal value types are not implemented.
+ * Other unsupported statements produce warnings. Invalid multiplexing is
  * an error. VERSION, NS_, BS_, BU_ and NS_ symbol declarations stay quiet.
  */
 class DbcParser {
@@ -49,7 +51,7 @@ public:
      * @brief Parse DBC file.
      * @param filePath Path to input file.
      * @return Parsed database.
-     * @throws std::runtime_error on file or parse errors.
+     * @throws std::runtime_error on file or parse errors, including SIG_VALTYPE_.
      * Line parse errors include the file path and one-based line number.
      * Duplicate normalized CAN IDs of the same frame type and duplicate signal
      * names within a frame are rejected at the repeated definition's line.