================
@@ -0,0 +1,973 @@
+#include "clang/Analysis/Scalable/Serialization/JSONFormat.h"
+#include "clang/Analysis/Scalable/TUSummary/TUSummary.h"
+
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/FormatVariadic.h"
+#include "llvm/Support/JSON.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/Registry.h"
+
+using namespace clang::ssaf;
+
+//----------------------------------------------------------------------------
+// ErrorBuilder - Fluent API for constructing contextual errors
+//----------------------------------------------------------------------------
+
+namespace {
+
+class ErrorBuilder {
+private:
+ std::error_code Code;
+ std::vector<std::string> ContextStack;
+
+ // Private constructor - only accessible via static factories
+ explicit ErrorBuilder(std::error_code EC) : Code(EC) {}
+
+ // Helper: Format message and add to context stack
+ template <typename... Args>
+ void addFormattedContext(const char *Fmt, Args &&...ArgVals) {
+ std::string Message =
+ llvm::formatv(Fmt, std::forward<Args>(ArgVals)...).str();
+ ContextStack.push_back(std::move(Message));
+ }
+
+public:
+ // Static factory: Create new error from error code and formatted message
+ template <typename... Args>
+ static ErrorBuilder create(std::error_code EC, const char *Fmt,
+ Args &&...ArgVals) {
+ ErrorBuilder Builder(EC);
+ Builder.addFormattedContext(Fmt, std::forward<Args>(ArgVals)...);
+ return Builder;
+ }
+
+ // Convenience overload for std::errc
+ template <typename... Args>
+ static ErrorBuilder create(std::errc EC, const char *Fmt, Args &&...ArgVals)
{
+ return create(std::make_error_code(EC), Fmt,
+ std::forward<Args>(ArgVals)...);
+ }
+
+ // Static factory: Wrap existing error and optionally add context
+ static ErrorBuilder wrap(llvm::Error E) {
+ if (!E) {
+ llvm::consumeError(std::move(E));
+ // Return builder with generic error code for success case
+ return ErrorBuilder(std::make_error_code(std::errc::invalid_argument));
+ }
+
+ std::error_code EC;
+ std::string ErrorMsg;
+
+ llvm::handleAllErrors(std::move(E), [&](const llvm::ErrorInfoBase &EI) {
+ EC = EI.convertToErrorCode();
+ ErrorMsg = EI.message();
+ });
+
+ ErrorBuilder Builder(EC);
+ if (!ErrorMsg.empty()) {
+ Builder.ContextStack.push_back(std::move(ErrorMsg));
+ }
+ return Builder;
+ }
+
+ // Add context (plain string)
+ ErrorBuilder &context(const char *Msg) {
+ ContextStack.push_back(Msg);
+ return *this;
+ }
+
+ // Add context (formatted string)
+ template <typename... Args>
+ ErrorBuilder &context(const char *Fmt, Args &&...ArgVals) {
+ addFormattedContext(Fmt, std::forward<Args>(ArgVals)...);
+ return *this;
+ }
+
+ // Build the final error
+ llvm::Error build() {
+ if (ContextStack.empty())
+ return llvm::Error::success();
+
+ // Reverse the context stack so that the most recent context appears first
+ // and the wrapped error (if any) appears last
+ std::vector<std::string> ReversedContext(ContextStack.rbegin(),
+ ContextStack.rend());
+ std::string FinalMessage = llvm::join(ReversedContext, "\n");
+ return llvm::createStringError(Code, "%s", FinalMessage.c_str());
+ }
+};
+
+} // namespace
+
+//----------------------------------------------------------------------------
+// Error Message Constants
+//----------------------------------------------------------------------------
+
+namespace {
+
+namespace ErrorMessages {
+
+constexpr const char *FailedToReadFile = "failed to read file '{0}': {1}";
----------------
aviralg wrote:
I looked for alternatives to my use of `llvm::formatv` that would produce a
compile-time error for incorrect number of arguments. C++ 20 introduces
`std::format` that can do this but LLVM targets C++ 17 so we have to stick with
`llvm::formatv`.
The error paths in the JSONFormat implementation are all properly tested (which
is why there are lots of tests), so the possibility of mistakes is pretty low.
https://github.com/llvm/llvm-project/pull/180021
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