[Tooling] Acknowledge that many CompilationDatabases don't support enumeration.

Summary: Provide default implementations so that only getCompileCommands() is mandatory.

Reviewers: ioeric

Subscribers: cfe-commits, bkramer, klimek

Differential Revision: https://reviews.llvm.org/D40409

llvm-svn: 318943

1 files changed, 9 insertions, 10 deletions

diff --git a/clang/lib/Tooling/CompilationDatabase.cpp b/clang/lib/Tooling/CompilationDatabase.cpp
index f252ef0b722..92b76b157dc 100644
--- a/clang/lib/Tooling/CompilationDatabase.cpp
+++ b/clang/lib/Tooling/CompilationDatabase.cpp
@@ -112,6 +112,15 @@ CompilationDatabase::autoDetectFromDirectory(StringRef SourceDir,
   return DB;
 }
 
+std::vector<CompileCommand> CompilationDatabase::getAllCompileCommands() const {
+  std::vector<CompileCommand> Result;
+  for (const auto &File : getAllFiles()) {
+    auto C = getCompileCommands(File);
+    std::move(C.begin(), C.end(), std::back_inserter(Result));
+  }
+  return Result;
+}
+
 CompilationDatabasePlugin::~CompilationDatabasePlugin() {}
 
 namespace {
@@ -342,16 +351,6 @@ FixedCompilationDatabase::getCompileCommands(StringRef FilePath) const {
   return Result;
 }
 
-std::vector<std::string>
-FixedCompilationDatabase::getAllFiles() const {
-  return std::vector<std::string>();
-}
-
-std::vector<CompileCommand>
-FixedCompilationDatabase::getAllCompileCommands() const {
-  return std::vector<CompileCommand>();
-}
-
 namespace {
 
 class FixedCompilationDatabasePlugin : public CompilationDatabasePlugin {