fs/Path: add method ToUTF8Throw()

src/fs/AllocatedPath.hxx

@@ -253,6 +253,10 @@ public:
 		return ((Path)*this).ToUTF8();
 	}
 
+	std::string ToUTF8Throw() const {
+		return ((Path)*this).ToUTF8Throw();
+	}
+
 	/**
 	 * Gets directory name of this path.
 	 * Returns a "nulled" instance on error.

src/fs/Path.cxx

@@ -25,12 +25,18 @@ std::string
 Path::ToUTF8() const noexcept
 {
 	try {
-		return ::PathToUTF8(c_str());
+		return ToUTF8Throw();
 	} catch (...) {
 		return std::string();
 	}
 }
 
+std::string
+Path::ToUTF8Throw() const
+{
+	return ::PathToUTF8(c_str());
+}
+
 Path::const_pointer_type
 Path::GetSuffix() const noexcept
 {

src/fs/Path.hxx

@@ -134,6 +134,11 @@ public:
 	gcc_pure
 	std::string ToUTF8() const noexcept;
 
+	/**
+	 * Like ToUTF8(), but throws on error.
+	 */
+	std::string ToUTF8Throw() const;
+
 	/**
 	 * Determine the "base" file name.
 	 * The return value points inside this object.