1 files changed, 182 insertions, 0 deletions
diff --git a/elpa/irony-20220110.849/server/src/TUManager.cpp b/elpa/irony-20220110.849/server/src/TUManager.cpp
new file mode 100644
index 0000000..afbdc82
--- /dev/null
+++ b/elpa/irony-20220110.849/server/src/TUManager.cpp
@@ -0,0 +1,182 @@
+/**
+ * \file
+ * \author Guillaume Papin <guillaume.papin@epitech.eu>
+ *
+ * \brief See TUManager.hh
+ *
+ * This file is distributed under the GNU General Public License. See
+ * COPYING for details.
+ *
+ */
+
+#include "TUManager.h"
+
+#include <iostream>
+
+TUManager::TUManager()
+  : index_(clang_createIndex(0, 0))
+  , translationUnits_()
+  , parseTUOptions_(clang_defaultEditingTranslationUnitOptions()) {
+
+  // this seems necessary to trigger "correct" reparse (/codeCompleteAt)
+  // clang_reparseTranslationUnit documentation states:
+  //
+  // >  * \param TU The translation unit whose contents will be re-parsed. The
+  // >  * translation unit must originally have been built with
+  // >  * \c clang_createTranslationUnitFromSourceFile().
+  //
+  // clang_createTranslationUnitFromSourceFile() is just a call to
+  // clang_parseTranslationUnit() with
+  // CXTranslationUnit_DetailedPreprocessingRecord enabled but because we want
+  // some other flags to be set we can't just call
+  // clang_createTranslationUnitFromSourceFile()
+  parseTUOptions_ |= CXTranslationUnit_DetailedPreprocessingRecord;
+
+#if HAS_BRIEF_COMMENTS_IN_COMPLETION
+  parseTUOptions_ |= CXTranslationUnit_IncludeBriefCommentsInCodeCompletion;
+#endif
+
+  // XXX: A bug in old version of Clang (at least '3.1-8') caused the completion
+  // to fail on the standard library types when
+  // CXTranslationUnit_PrecompiledPreamble is used. We disable this option for
+  // old versions of libclang. As a result the completion will work but
+  // significantly slower.
+  //
+  // -- https://github.com/Sarcasm/irony-mode/issues/4
+  if (CINDEX_VERSION < 6) {
+    parseTUOptions_ &= ~CXTranslationUnit_PrecompiledPreamble;
+  }
+
+#if CINDEX_VERSION >= 34
+  // Keep going even after fatal errors, or syntax checking will stop after the
+  // first error. For instance unused variables will not be reported until the
+  // error has been fixed.
+  parseTUOptions_ |= CXTranslationUnit_KeepGoing;
+#endif
+}
+
+TUManager::~TUManager() {
+  clang_disposeIndex(index_);
+}
+
+CXTranslationUnit &TUManager::tuRef(const std::string &filename,
+                                    const std::vector<std::string> &flags) {
+  CXTranslationUnit &tu = translationUnits_[filename];
+
+  // if the flags changed since the last time, invalidate the translation unit
+  auto &flagsCache = flagsPerFileCache_[filename];
+  if (flagsCache.size() != flags.size() ||
+      !std::equal(flagsCache.begin(), flagsCache.end(), flags.begin())) {
+    if (tu) {
+      clang_disposeTranslationUnit(tu);
+      tu = nullptr;
+    }
+    // remember the flags for the next parse
+    flagsCache = flags;
+  }
+  return tu;
+}
+
+CXTranslationUnit
+TUManager::parse(const std::string &filename,
+                 const std::vector<std::string> &flags,
+                 const std::vector<CXUnsavedFile> &unsavedFiles) {
+  CXTranslationUnit &tu = tuRef(filename, flags);
+
+  if (tu == nullptr) {
+    std::vector<const char *> argv;
+
+#ifdef CLANG_RESOURCE_DIR
+    // Make sure libclang find its builtin headers, this is a known issue with
+    // libclang, see:
+    // - http://lists.cs.uiuc.edu/pipermail/cfe-dev/2012-July/022893.html
+    //
+    // > Make sure that Clang is using its own . It will be in a directory
+    // > ending in clang/3.2/include/ where 3.2 is the version of clang that you
+    // > are using. You may need to explicitly add it to your header search.
+    // > Usually clang finds this directory relative to the executable with
+    // > CompilerInvocation::GetResourcesPath(Argv0, MainAddr), but using just
+    // > the libraries, it can't automatically find it.
+    argv.push_back("-resource-dir");
+    argv.push_back(CLANG_RESOURCE_DIR);
+#endif
+
+    for (auto &flag : flags) {
+      argv.push_back(flag.c_str());
+    }
+
+    tu = clang_parseTranslationUnit(
+        index_,
+        filename.c_str(),
+        argv.data(),
+        static_cast<int>(argv.size()),
+        const_cast<CXUnsavedFile *>(unsavedFiles.data()),
+        unsavedFiles.size(),
+        parseTUOptions_);
+  }
+
+  if (tu == nullptr) {
+    std::clog << "error: libclang couldn't parse '" << filename << "'\n";
+    return nullptr;
+  }
+
+  // Reparsing is necessary to enable optimizations.
+  //
+  // From the clang mailing list (cfe-dev):
+  // From: Douglas Gregor
+  // Subject: Re: Clang indexing library performance
+  // ...
+  // You want to use the "default editing options" when parsing the translation
+  // unit
+  //    clang_defaultEditingTranslationUnitOptions()
+  // and then reparse at least once. That will enable the various
+  // code-completion optimizations that should bring this time down
+  // significantly.
+  if (clang_reparseTranslationUnit(
+          tu,
+          unsavedFiles.size(),
+          const_cast<CXUnsavedFile *>(unsavedFiles.data()),
+          clang_defaultReparseOptions(tu))) {
+    // a 'fatal' error occured (even a diagnostic is impossible)
+    clang_disposeTranslationUnit(tu);
+    std::clog << "error: libclang couldn't reparse '" << filename << "'\n";
+    tu = 0;
+    return nullptr;
+  }
+
+  return tu;
+}
+
+CXTranslationUnit
+TUManager::getOrCreateTU(const std::string &filename,
+                         const std::vector<std::string> &flags,
+                         const std::vector<CXUnsavedFile> &unsavedFiles) {
+  if (auto tu = tuRef(filename, flags))
+    return tu;
+
+  return parse(filename, flags, unsavedFiles);
+}
+
+void TUManager::invalidateCachedTU(const std::string &filename) {
+  TranslationUnitsMap::iterator it = translationUnits_.find(filename);
+
+  if (it != translationUnits_.end()) {
+    if (CXTranslationUnit &tu = it->second)
+      clang_disposeTranslationUnit(tu);
+
+    translationUnits_.erase(it);
+  }
+}
+
+void TUManager::invalidateAllCachedTUs() {
+  TranslationUnitsMap::iterator it = translationUnits_.begin();
+
+  while (it != translationUnits_.end()) {
+    if (CXTranslationUnit &tu = it->second) {
+      clang_disposeTranslationUnit(tu);
+      translationUnits_.erase(it++); // post-increment keeps the iterator valid
+    } else {
+      ++it;
+    }
+  }
+}