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README

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This commit is contained in:
Fangrui Song 2018-09-01 15:37:09 -07:00
parent 407c7cc29d
commit 11e92d52a8
3 changed files with 20 additions and 16 deletions
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27
README.md
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@ -6,17 +6,21 @@
ccls, which originates from [cquery](https://github.com/cquery-project/cquery), is a C/C++/Objective-C language server.
* code completion (with both signature help and snippets)
* [definition](src/messages/text_document_definition.cc)/[references](src/messages/text_document_references.cc), and other cross references
* [call (caller/callee) hierarchy](src/messages/ccls_call_hierarchy.cc), [inheritance (base/derived) hierarchy](src/messages/ccls_inheritance_hierarchy.cc), [member hierarchy](src/messages/ccls_member_hierarchy.cc)
* [symbol rename](src/messages/text_document_rename.cc)
* [document symbols](src/messages/text_document_document_symbol.cc) and approximate search of [workspace symbol](src/messages/workspace_symbol.cc)
* [hover information](src/messages/text_document_hover.cc)
* diagnostics
* code actions (clang FixIts)
* preprocessor skipped regions
* semantic highlighting, including support for [rainbow semantic highlighting](https://medium.com/@evnbr/coding-in-color-3a6db2743a1e)
* [definition](src/messages/textDocument_definition.cc)/[references](src/messages/textDcument_references.cc), and other cross references
* hierarchies: [call (caller/callee) hierarchy](src/messages/ccls_callHierarchy.cc), [inheritance (base/derived) hierarchy](src/messages/ccls_inheritanceHierarchy.cc), [member hierarchy](src/messages/ccls_memberHierarchy.cc)
* [symbol rename](src/messages/text_documentRename.cc)
* [document symbols](src/messages/textDocument_documentSymbol.cc) and approximate search of [workspace symbol](src/messages/workspace_symbol.cc)
* [hover information](src/messages/textDocument_hover.cc)
* diagnostics and code actions (clang FixIts)
* semantic highlighting and preprocessor skipped regions
It makes use of C++17 features, has less third-party dependencies and slimmed-down code base. Cross reference features are strengthened, (see [wiki/FAQ](../../wiki/FAQ)). It currently uses libclang to index C++ code but will switch to Clang C++ API. Refactoring and formatting are non-goals as they can be provided by clang-format, clang-include-fixer and other Clang based tools.
It has a global view of the code base and support a lot of cross reference features, see [wiki/FAQ](../../wiki/FAQ).
It starts indexing the whole project (including subprojects if exist) parallelly when you open the first file, while the main thread can serve requests before the indexing is complete.
Saving files will incrementally update the index.
Compared with cquery, it makes use of C++17 features, has less third-party dependencies and slimmed-down code base.
It leverages Clang C++ API as [clangd](https://clang.llvm.org/extra/clangd.html) does, which provides better support for code completion and diagnostics.
Refactoring and formatting are non-goals as they can be provided by clang-format, clang-include-fixer and other Clang based tools.
The comparison with cquery as noted on 2018-07-15:
@ -35,4 +39,7 @@ cquery has system include path detection (through running the compiler driver) w
* [Build](../../wiki/Build)
* [Emacs](../../wiki/Emacs)
* [LanguageClient-neovim](../../wiki/LanguageClient-neovim)
* [FAQ](../../wiki/FAQ)
ccls can index itself (~180MiB RSS when ide, noted on 2018-09-01), FreeBSD, glibc, Linux, LLVM (~1800MiB RSS), musl (~60MiB RSS), ... with decent memory footprint. See [wiki/compile_commands.json](../../wiki/compile_commands.json) for examples.

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src/pipeline.cc
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@ -270,13 +270,10 @@ bool Indexer_Parse(DiagnosticsPublisher *diag_pub, WorkingFiles *working_files,
// Write current index to disk if requested.
LOG_S(INFO) << "store index for " << path;
{
static Timer timer("write", "store index");
timer.startTimer();
std::string cache_path = GetCachePath(path);
WriteToFile(cache_path, curr->file_contents);
WriteToFile(AppendSerializationFormat(cache_path),
Serialize(g_config->cacheFormat, *curr));
timer.stopTimer();
}
vfs->Reset(path);

6
src/serializer.cc
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@ -324,9 +324,9 @@ template <typename TVisitor> void Reflect(TVisitor &visitor, IndexFile &value) {
REFLECT_MEMBER_END();
}
void Reflect(Reader &visitor, SerializeFormat &value) {
std::string fmt = visitor.GetString();
value = fmt[0] == 'b' ? SerializeFormat::Binary : SerializeFormat::Json;
void Reflect(Reader &vis, SerializeFormat &v) {
v = vis.GetString()[0] == 'j' ? SerializeFormat::Json
: SerializeFormat::Binary;
}
void Reflect(Writer &visitor, SerializeFormat &value) {