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Add custom exception #3

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merged 1 commit into from
Dec 21, 2023
Merged

Add custom exception #3

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2 changes: 1 addition & 1 deletion example/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -210,7 +210,7 @@ int main(int, char** argv) {
// export YCS_ENV_IPS=["Google","Runoob","Taobao"]
auto [cfg, error] = yaml_cpp_struct::from_yaml_env<Config>(argv[1], "YCS_ENV_");
if (!cfg) {
spdlog::error("{}", error);
spdlog::error("error: [{}]", error);
return -1;
}
#endif
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33 changes: 30 additions & 3 deletions include/yaml_cpp_struct.hpp
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Expand Up @@ -69,6 +69,28 @@ inline nlohmann::json yaml2json(const YAML::Node& root) {

namespace yaml_cpp_struct {

class Exception : public std::exception {
public:
explicit Exception(const char* what) noexcept
: m_what(what) {
}

explicit Exception(const std::string& what) noexcept
: m_what(what) {
}

const char* what() const noexcept override {
return m_what.c_str();
}

protected:
Exception() noexcept {
}

private:
std::string m_what;
};

template <typename... Args>
inline std::string string_format(const std::string& format, Args... args) {
int size_s = std::snprintf(nullptr, 0, format.c_str(), args...) + 1;
Expand Down Expand Up @@ -139,7 +161,7 @@ inline std::tuple<std::optional<T>, std::string> from_yaml(const std::string& st
} catch (const YAML::BadFile& e) {
return std::make_tuple(std::nullopt, string_format("%s not found or broken", str.c_str()));
} catch (const std::exception& e) {
return std::make_tuple(std::nullopt, string_format("on parsing %s: %s", str.c_str(), e.what()));
return std::make_tuple(std::nullopt, string_format("on parsing %s -> %s", str.c_str(), e.what()));
}
}

Expand Down Expand Up @@ -289,7 +311,12 @@ struct convert<std::variant<T...>> {
} \
} \
else \
value = yaml_cpp_struct::node_as<ToType>(node[name]); \
try { \
value = yaml_cpp_struct::node_as<ToType>(node[name]); \
} catch (const std::runtime_error&) { \
auto error = yaml_cpp_struct::string_format("lost: %s", name); \
throw yaml_cpp_struct::Exception(error); \
} \
}); \
return true; \
} \
Expand Down Expand Up @@ -340,7 +367,7 @@ struct convert<std::variant<T...>> {
rhs = value.value(); \
else { \
auto error = yaml_cpp_struct::string_format("bad enum value: %s", enum_str.c_str()); \
throw YAML::RepresentationException(node.Mark(), error); \
throw yaml_cpp_struct::Exception(error); \
} \
return true; \
} \
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