1//===--- RedundantVoidArgCheck.h - clang-tidy --------------------*- 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#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_REDUNDANT_VOID_ARG_CHECK_H
10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_REDUNDANT_VOID_ARG_CHECK_H
11
12#include "../ClangTidyCheck.h"
13#include "clang/Lex/Token.h"
14
15#include <string>
16
17namespace clang::tidy::modernize {
18
19/// Find and remove redundant void argument lists.
20///
21/// Examples:
22/// `int f(void);` becomes `int f();`
23/// `int (*f(void))(void);` becomes `int (*f())();`
24/// `typedef int (*f_t(void))(void);` becomes `typedef int (*f_t())();`
25/// `void (C::*p)(void);` becomes `void (C::*p)();`
26/// `C::C(void) {}` becomes `C::C() {}`
27/// `C::~C(void) {}` becomes `C::~C() {}`
28///
29class RedundantVoidArgCheck : public ClangTidyCheck {
30public:
31 RedundantVoidArgCheck(StringRef Name, ClangTidyContext *Context)
32 : ClangTidyCheck(Name, Context) {}
33
34 bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
35 return LangOpts.CPlusPlus;
36 }
37
38 void registerMatchers(ast_matchers::MatchFinder *Finder) override;
39
40 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
41
42private:
43 void processFunctionDecl(const ast_matchers::MatchFinder::MatchResult &Result,
44 const FunctionDecl *Function);
45
46 void
47 processTypedefNameDecl(const ast_matchers::MatchFinder::MatchResult &Result,
48 const TypedefNameDecl *Typedef);
49
50 void processFieldDecl(const ast_matchers::MatchFinder::MatchResult &Result,
51 const FieldDecl *Member);
52
53 void processVarDecl(const ast_matchers::MatchFinder::MatchResult &Result,
54 const VarDecl *Var);
55
56 void
57 processNamedCastExpr(const ast_matchers::MatchFinder::MatchResult &Result,
58 const CXXNamedCastExpr *NamedCast);
59
60 void
61 processExplicitCastExpr(const ast_matchers::MatchFinder::MatchResult &Result,
62 const ExplicitCastExpr *ExplicitCast);
63
64 void processLambdaExpr(const ast_matchers::MatchFinder::MatchResult &Result,
65 const LambdaExpr *Lambda);
66
67 void
68 removeVoidArgumentTokens(const ast_matchers::MatchFinder::MatchResult &Result,
69 SourceRange Range, StringRef GrammarLocation);
70
71 void removeVoidToken(Token VoidToken, StringRef Diagnostic);
72};
73
74} // namespace clang::tidy::modernize
75
76#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_REDUNDANT_VOID_ARG_CHECK_H
77

source code of clang-tools-extra/clang-tidy/modernize/RedundantVoidArgCheck.h