refactor(eventsub): enforce static error categories (#5903)

lib/twitch-eventsub-ws/ast/lib/generate.py

@@ -17,7 +17,7 @@ def _generate_implementation(header_path: str, items: list[Struct | Enum]) -> st
     doc = f"""// WARNING: This file is automatically generated. Any changes will be lost.
 #include "{header_path}"
 #include "twitch-eventsub-ws/chrono.hpp" // IWYU pragma: keep
-#include "twitch-eventsub-ws/errors.hpp"
+#include "twitch-eventsub-ws/detail/errors.hpp"
 #include <boost/json.hpp>
 
 """

lib/twitch-eventsub-ws/ast/lib/templates/enum-implementation.tmpl

@@ -3,8 +3,7 @@ boost::json::result_for<{{enum.full_name}}, boost::json::value>::type tag_invoke
 {
     if (!jvRoot.is_string())
     {
-        static const error::ApplicationErrorCategory errorMustBeString{"{{enum.full_name}} must be a string"};
-        return boost::system::error_code{129, errorMustBeString};
+        EVENTSUB_BAIL_HERE(error::Kind::ExpectedString);
     }
     std::string_view eString(jvRoot.get_string());
 
@@ -16,6 +15,5 @@ boost::json::result_for<{{enum.full_name}}, boost::json::value>::type tag_invoke
     }
 {%- endfor %}
 
-    static const error::ApplicationErrorCategory errorEnumNameDidNotExist{"{{enum.full_name}} did not have a constant that matched this string"};
-    return boost::system::error_code{129, errorEnumNameDidNotExist};
+    EVENTSUB_BAIL_HERE(error::Kind::UnknownEnumValue);
 }

lib/twitch-eventsub-ws/ast/lib/templates/error-missing-field.tmpl

@@ -1,2 +1 @@
-static const error::ApplicationErrorCategory error_missing_field_{{field.name}}{"Missing required key {{field.json_name}}"};
-return boost::system::error_code{129, error_missing_field_{{field.name}}};
+EVENTSUB_BAIL_HERE(error::Kind::FieldMissing);

lib/twitch-eventsub-ws/ast/lib/templates/struct-implementation.tmpl

@@ -4,28 +4,24 @@ boost::json::result_for<{{struct.full_name}}, boost::json::value>::type tag_invo
     {% if struct.inner_root %}
     if (!jvRoot.is_object())
     {
-        static const error::ApplicationErrorCategory errorMustBeObject{"{{struct.full_name}} must be an object"};
-        return boost::system::error_code{129, errorMustBeObject};
+        EVENTSUB_BAIL_HERE(error::Kind::ExpectedObject);
     }
     const auto &outerRoot = jvRoot.get_object();
 
     const auto *jvInnerRoot = outerRoot.if_contains("{{struct.inner_root}}");
     if (jvInnerRoot == nullptr)
     {
-        static const error::ApplicationErrorCategory errorMissing{"{{struct.full_name}}'s key {{struct.inner_root}} is missing"};
-        return boost::system::error_code{129, errorMissing};
+        EVENTSUB_BAIL_HERE(error::Kind::InnerRootMissing);
     }
     if (!jvInnerRoot->is_object())
     {
-        static const error::ApplicationErrorCategory errorMustBeObject{"{{struct.full_name}}'s {{struct.inner_root}} must be an object"};
-        return boost::system::error_code{129, errorMustBeObject};
+        EVENTSUB_BAIL_HERE(error::Kind::ExpectedObject);
     }
     const auto &root = jvInnerRoot->get_object();
     {% else %}
     if (!jvRoot.is_object())
     {
-        static const error::ApplicationErrorCategory errorMustBeObject{"{{struct.full_name}} must be an object"};
-        return boost::system::error_code{129, errorMustBeObject};
+        EVENTSUB_BAIL_HERE(error::Kind::ExpectedObject);
     }
     const auto &root = jvRoot.get_object();
     {% endif %}