1 files changed, 15 insertions, 2 deletions
diff --git a/toolsrc/include/SourceParagraph.h b/toolsrc/include/SourceParagraph.h
index 19f558170..9874eb3a9 100644
--- a/toolsrc/include/SourceParagraph.h
+++ b/toolsrc/include/SourceParagraph.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "vcpkg_expected.h"
 #include <unordered_map>
 #include <vector>
 
@@ -15,14 +16,23 @@ namespace vcpkg
 
     const std::string& to_string(const Dependency& dep);
 
+    struct ParseControlErrorInfo
+    {
+        std::string name;
+        std::string remaining_fields_as_string;
+        std::string valid_fields_as_string;
+        std::error_code error;
+    };
+
     /// <summary>
     /// Port metadata (CONTROL file)
     /// </summary>
     struct SourceParagraph
     {
-        SourceParagraph();
+        static ExpectedT<SourceParagraph, ParseControlErrorInfo> parse_control_file(
+            std::unordered_map<std::string, std::string> fields);
 
-        explicit SourceParagraph(std::unordered_map<std::string, std::string> fields);
+        SourceParagraph();
 
         std::string name;
         std::string version;
@@ -31,6 +41,9 @@ namespace vcpkg
         std::vector<Dependency> depends;
     };
 
+    void print_error_message(const ParseControlErrorInfo& info);
+    void print_error_message(std::vector<ParseControlErrorInfo> error_info_list);
+
     std::vector<std::string> filter_dependencies(const std::vector<Dependency>& deps, const Triplet& t);
 
     std::vector<Dependency> expand_qualified_dependencies(const std::vector<std::string>& depends);