[vcpkg] Use unique_ptr<> for paragraphs. Post-parser phase rework.

1 files changed, 36 insertions, 0 deletions

diff --git a/toolsrc/include/vcpkg_Parse.h b/toolsrc/include/vcpkg_Parse.h
new file mode 100644
index 000000000..a2eb152dc
--- /dev/null
+++ b/toolsrc/include/vcpkg_Parse.h
@@ -0,0 +1,36 @@
+#pragma once
+
+#include <memory>
+#include <unordered_map>
+
+#include "vcpkg_expected.h"
+#include "vcpkg_optional.h"
+
+namespace vcpkg::Parse
+{
+    struct ParseControlErrorInfo
+    {
+        std::string name;
+        std::vector<std::string> missing_fields;
+        std::vector<std::string> extra_fields;
+        std::error_code error;
+    };
+
+    template<class P>
+    using ParseExpected = ExpectedT<std::unique_ptr<P>, std::unique_ptr<ParseControlErrorInfo>>;
+
+    using RawParagraph = std::unordered_map<std::string, std::string>;
+
+    struct ParagraphParser
+    {
+        ParagraphParser(RawParagraph&& fields) : fields(std::move(fields)) {}
+
+        void required_field(const std::string& fieldname, std::string& out);
+        std::string optional_field(const std::string& fieldname);
+        std::unique_ptr<ParseControlErrorInfo> error_info(const std::string& name) const;
+
+    private:
+        RawParagraph&& fields;
+        std::vector<std::string> missing_fields;
+    };
+}