Make dash usable for subcommand

CHANGELOG.md

@@ -40,6 +40,8 @@ If possible, provide tooling that performs the changes, e.g. a shell-script.
 * The `seqan3::argument_parser` has a new member function `seqan3::argument_parser::is_option_set` that
   checks whether an option, identified by its long or short name, was set on the command line by the user
   ([\#1859](https://github.com/seqan/seqan3/pull/1859)).
+* The subcommand of the `seqan3::argument_parser` may contain a dash
+  ([\#2306](https://github.com/seqan/seqan3/pull/2306)).
 
 #### Search
 

include/seqan3/argument_parser/argument_parser.hpp

@@ -187,12 +187,20 @@ class argument_parser
         subcommands{std::move(subcommands)}
     {
         if (!std::regex_match(app_name, app_name_regex))
-            throw design_error{"The application name must only contain alpha-numeric characters or '_' and '-' "
-                               "(regex: \"^[a-zA-Z0-9_-]+$\")."};
+        {
+            throw design_error{("The application name must only contain alpha-numeric characters or '_' and '-' "
+                               "(regex: \"^[a-zA-Z0-9_-]+$\").")};
+        }
 
         for (auto & sub : this->subcommands)
-            if (!std::regex_match(sub, std::regex{"^[a-zA-Z0-9_]+$"}))
-                throw design_error{"The subcommand name must only contain alpha-numeric characters or '_'."};
+        {
+            if (!std::regex_match(sub, app_name_regex))
+            {
+                throw design_error{"The subcommand name must only contain alpha-numeric characters or '_' and '-' "
+                                   "(regex: \"^[a-zA-Z0-9_-]+$\")."};
+            }
+        }
+
 
         info.app_name = std::move(app_name);
 

test/unit/argument_parser/argument_parser_design_error_test.cpp

@@ -138,11 +138,6 @@ TEST(parse_test, subcommand_argument_parser_error)
                                               argv,
                                               seqan3::update_notifications::off,
                                               {"with space"}}), seqan3::design_error);
-        EXPECT_THROW((seqan3::argument_parser{"top_level",
-                                              2,
-                                              argv,
-                                              seqan3::update_notifications::off,
-                                              {"-dash"}}), seqan3::design_error);
     }
 
     // no positional/options are allowed

test/unit/argument_parser/format_parse_test.cpp

@@ -932,8 +932,8 @@ TEST(parse_test, subcommand_argument_parser_success)
     }
 
     // incorrect sub command
+    const char * argv[]{"./top_level", "subiddysub", "-f"};
     { // see issue https://github.com/seqan/seqan3/issues/2172
-        const char * argv[]{"./top_level", "subiddysub", "-f"};
         seqan3::argument_parser top_level_parser{"top_level",
                                                  3,
                                                  argv,
@@ -942,6 +942,15 @@ TEST(parse_test, subcommand_argument_parser_success)
 
         EXPECT_THROW(top_level_parser.parse(), seqan3::argument_parser_error);
     }
+
+    // sub command can contain dash, see https://github.com/seqan/product_backlog/issues/234
+    {
+        EXPECT_NO_THROW((seqan3::argument_parser{"top_level",
+                                                 2,
+                                                 argv,
+                                                 seqan3::update_notifications::off,
+                                                 {"-dash"}}));
+    }
 }
 
 TEST(parse_test, issue1544)