[lldb] Hoist SupportFile out of FileSpecList (NFC)

This hoists SupportFile out of FileSpecList. SupportFileList is still
implemented there as it's very similar to FileSpecList.

Author: JDevlieghere

lldb/include/lldb/Utility/FileSpecList.h

@@ -9,42 +9,15 @@
 #ifndef LLDB_CORE_FILESPECLIST_H
 #define LLDB_CORE_FILESPECLIST_H
 
-#include "lldb/Utility/Checksum.h"
 #include "lldb/Utility/FileSpec.h"
+#include "lldb/Utility/SupportFile.h"
 
 #include <cstddef>
 #include <vector>
 
 namespace lldb_private {
 class Stream;
 
-/// Wraps either a FileSpec that represents a local file or a source
-/// file whose contents is known (for example because it can be
-/// reconstructed from debug info), but that hasn't been written to a
-/// file yet.
-class SupportFile {
-protected:
-  FileSpec m_file_spec;
-  Checksum m_checksum;
-
-public:
-  SupportFile(const FileSpec &spec) : m_file_spec(spec), m_checksum() {}
-  SupportFile(const FileSpec &spec, const Checksum &checksum)
-      : m_file_spec(spec), m_checksum(checksum) {}
-  SupportFile(const SupportFile &other) = delete;
-  SupportFile(SupportFile &&other) = default;
-  virtual ~SupportFile() = default;
-  bool operator==(const SupportFile &other) {
-    return m_file_spec == other.m_file_spec && m_checksum == other.m_checksum;
-  }
-  /// Return the file name only. Useful for resolving breakpoints by file name.
-  const FileSpec &GetSpecOnly() const { return m_file_spec; };
-  /// Return the checksum or all zeros if there is none.
-  const Checksum &GetChecksum() const { return m_checksum; };
-  /// Materialize the file to disk and return the path to that temporary file.
-  virtual const FileSpec &Materialize() { return m_file_spec; }
-};
-
 /// A list of support files for a CompileUnit.
 class SupportFileList {
 public:

lldb/include/lldb/Utility/SupportFile.h

@@ -0,0 +1,52 @@
+//===-- SupportFile.h -------------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_UTILITY_SUPPORTFILE_H
+#define LLDB_UTILITY_SUPPORTFILE_H
+
+#include "lldb/Utility/Checksum.h"
+#include "lldb/Utility/FileSpec.h"
+
+namespace lldb_private {
+
+/// Wraps either a FileSpec that represents a local file or a source
+/// file whose contents is known (for example because it can be
+/// reconstructed from debug info), but that hasn't been written to a
+/// file yet. This also stores an optional checksum of the on-disk content.
+class SupportFile {
+public:
+  SupportFile(const FileSpec &spec) : m_file_spec(spec), m_checksum() {}
+  SupportFile(const FileSpec &spec, const Checksum &checksum)
+      : m_file_spec(spec), m_checksum(checksum) {}
+
+  SupportFile(const SupportFile &other) = delete;
+  SupportFile(SupportFile &&other) = default;
+
+  virtual ~SupportFile() = default;
+
+  bool operator==(const SupportFile &other) {
+    return m_file_spec == other.m_file_spec && m_checksum == other.m_checksum;
+  }
+
+  /// Return the file name only. Useful for resolving breakpoints by file name.
+  const FileSpec &GetSpecOnly() const { return m_file_spec; };
+
+  /// Return the checksum or all zeros if there is none.
+  const Checksum &GetChecksum() const { return m_checksum; };
+
+  /// Materialize the file to disk and return the path to that temporary file.
+  virtual const FileSpec &Materialize() { return m_file_spec; }
+
+protected:
+  FileSpec m_file_spec;
+  Checksum m_checksum;
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_UTILITY_SUPPORTFILE_H