1 //===--- CodeCompletionStrings.h ---------------------------------*- C++-*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // Functions for retrieving code completion information from
10 // `CodeCompletionString`.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_CODECOMPLETIONSTRINGS_H
15 #define LLVM_CLANG_TOOLS_EXTRA_CLANGD_CODECOMPLETIONSTRINGS_H
16 
17 #include "clang/Sema/CodeCompleteConsumer.h"
18 
19 namespace clang {
20 class ASTContext;
21 
22 namespace clangd {
23 
24 /// Gets a minimally formatted documentation comment of \p Result, with comment
25 /// markers stripped. See clang::RawComment::getFormattedText() for the detailed
26 /// explanation of how the comment text is transformed.
27 /// Returns empty string when no comment is available.
28 /// If \p CommentsFromHeaders parameter is set, only comments from the main
29 /// file will be returned. It is used to workaround crashes when parsing
30 /// comments in the stale headers, coming from completion preamble.
31 std::string getDocComment(const ASTContext &Ctx,
32                           const CodeCompletionResult &Result,
33                           bool CommentsFromHeaders);
34 
35 /// Similar to getDocComment, but returns the comment for a NamedDecl.
36 std::string getDeclComment(const ASTContext &Ctx, const NamedDecl &D);
37 
38 /// Formats the signature for an item, as a display string and snippet.
39 /// e.g. for const_reference std::vector<T>::at(size_type) const, this returns:
40 ///   *Signature = "(size_type) const"
41 ///   *Snippet = "(${1:size_type})"
42 /// If set, RequiredQualifiers is the text that must be typed before the name.
43 /// e.g "Base::" when calling a base class member function that's hidden.
44 ///
45 /// When \p CompletingPattern is true, the last placeholder will be of the form
46 /// ${0:…}, indicating the cursor should stay there.
47 void getSignature(const CodeCompletionString &CCS, std::string *Signature,
48                   std::string *Snippet,
49                   std::string *RequiredQualifiers = nullptr,
50                   bool CompletingPattern = false);
51 
52 /// Assembles formatted documentation for a completion result. This includes
53 /// documentation comments and other relevant information like annotations.
54 ///
55 /// \param DocComment is a documentation comment for the original declaration,
56 ///        it should be obtained via getDocComment or getParameterDocComment.
57 std::string formatDocumentation(const CodeCompletionString &CCS,
58                                 llvm::StringRef DocComment);
59 
60 /// Gets detail to be used as the detail field in an LSP completion item. This
61 /// is usually the return type of a function.
62 std::string getReturnType(const CodeCompletionString &CCS);
63 
64 } // namespace clangd
65 } // namespace clang
66 
67 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_CODECOMPLETIONSTRINGS_H
68