Improve error messages

Garbage/Include/Garbage/SimpleConf.hpp

@@ -52,16 +52,18 @@ namespace Garbage
         class ReadError : public SimpleConfError
         {
         public:
-            ReadError(std::string_view message)
+            ReadError(std::string_view path, std::string_view message)
-                : SimpleConfError(SimpleConfErrorKind::ReadError, message)
+                : SimpleConfError(SimpleConfErrorKind::ReadError,
+                                  std::format("[Path {}] {}", path, message))
             {}
         };
 
         class ConversionError : public SimpleConfError
         {
         public:
-            ConversionError(std::string_view message)
+            ConversionError(std::string_view key, std::string_view message)
-                : SimpleConfError(SimpleConfErrorKind::ConversionError, message)
+                : SimpleConfError(SimpleConfErrorKind::ConversionError,
+                                  std::format("[Key {}] {}", key, message))
             {}
         };
 
@@ -84,7 +86,7 @@ namespace Garbage
 
         template <typename T>
         constexpr
-        T Convert(std::string_view rawValue)
+        T Convert(std::string_view key, std::string_view rawValue)
         {
             if constexpr (std::is_same_v<T, std::string>) {
                 return std::string(rawValue);
@@ -97,22 +99,22 @@ namespace Garbage
                                                  result);
 
                 if (ptr != rawValue.data() + rawValue.size()) {
-                    throw ConversionError("Could not parse the whole value");
+                    throw ConversionError(key, "Could not parse the whole value");
                 }
                 else if (ec == std::errc::invalid_argument) {
-                    throw ConversionError("The value is not a valid number");
+                    throw ConversionError(key, "The value is not a valid number");
                 }
                 else if (ec == std::errc::result_out_of_range) {
-                    throw ConversionError("The value is too large to store in the requested type");
+                    throw ConversionError(key, "The value is out of range of the requested type");
                 }
                 else if (ec != std::errc()) {
-                    throw ConversionError("Unknown error");
+                    throw ConversionError(key, "Unknown error");
                 }
 
                 return result;
             }
 
-            throw ConversionError("Can't convert the raw value to the requested type");
+            throw ConversionError(key, "Can't convert the raw value to the requested type");
         }
 
         using PairsType = std::unordered_map<std::string_view, std::string_view>;
@@ -245,20 +247,20 @@ namespace Garbage
 
             std::error_code ec;
             if (!fs::exists(path, ec) || ec) {
-                throw ReadError("The specified file does not exist");
+                throw ReadError(path.string(), "The specified file does not exist");
             }
             if (!fs::is_regular_file(path, ec) || ec) {
-                throw ReadError("The the specified path is not a regular file");
+                throw ReadError(path.string(), "The the specified path is not a regular file");
             }
 
             std::size_t fileSize = fs::file_size(path, ec);
             if (ec) {
-                throw ReadError("Could not read the file size");
+                throw ReadError(path.string(), "Could not read the file size");
             }
 
             std::ifstream file(path, std::ios::binary);
             if (!file) {
-                throw ReadError("Could not open the file for reading");
+                throw ReadError(path.string(), "Could not open the file for reading");
             }
 
             mConfContent = std::string(fileSize, '\0');
@@ -297,7 +299,7 @@ namespace Garbage
             }
 
             if constexpr (std::is_same_v<RequireValue, Required>) {
-                throw LookupError("Required config key not found");
+                throw LookupError(std::format("Required config key \"{}\" not found", key));
             }
 
             return defaultValue;