================
@@ -0,0 +1,207 @@
+//===- ErrorBuilder.h - Fluent API for contextual errors --------*- C++
-*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the ErrorBuilder class, which provides a fluent API for
+// constructing contextual error messages with layered context information.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_ANALYSIS_SCALABLE_SUPPORT_ERRORBUILDER_H
+#define LLVM_CLANG_ANALYSIS_SCALABLE_SUPPORT_ERRORBUILDER_H
+
+#include "llvm/Support/Error.h"
+#include "llvm/Support/FormatVariadic.h"
+#include <optional>
+#include <string>
+#include <system_error>
+#include <vector>
+
+namespace clang::ssaf {
+
+/// Fluent API for constructing contextual errors.
+///
+/// ErrorBuilder allows building error messages with layered context
+/// information. Context is added innermost to outermost, and the final
+/// error message presents the context in reverse order (outermost first).
+///
+/// Example usage:
+/// return ErrorBuilder::create(std::errc::invalid_argument,
+/// "invalid value {0}", value)
+/// .context("processing field '{0}'", fieldName)
+/// .context("reading configuration")
+/// .build();
----------------
steakhal wrote:
```suggestion
/// Example usage:
/// \code
/// return ErrorBuilder::create(std::errc::invalid_argument,
/// "invalid value {0}", value)
/// .context("processing field '{0}'", fieldName)
/// .context("reading configuration")
/// .build();
/// \endcode
```
https://github.com/llvm/llvm-project/pull/181765
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