1//===--- FunctionSizeCheck.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_READABILITY_FUNCTIONSIZECHECK_H
10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_FUNCTIONSIZECHECK_H
11
12#include "../ClangTidyCheck.h"
13
14namespace clang::tidy::readability {
15
16/// Checks for large functions based on various metrics.
17///
18/// These options are supported:
19///
20/// * `LineThreshold` - flag functions exceeding this number of lines. The
21/// default is `-1` (ignore the number of lines).
22/// * `StatementThreshold` - flag functions exceeding this number of
23/// statements. This may differ significantly from the number of lines for
24/// macro-heavy code. The default is `800`.
25/// * `BranchThreshold` - flag functions exceeding this number of control
26/// statements. The default is `-1` (ignore the number of branches).
27/// * `ParameterThreshold` - flag functions having a high number of
28/// parameters. The default is `-1` (ignore the number of parameters).
29/// * `NestingThreshold` - flag compound statements which create next nesting
30/// level after `NestingThreshold`. This may differ significantly from the
31/// expected value for macro-heavy code. The default is `-1` (ignore the
32/// nesting level).
33/// * `VariableThreshold` - flag functions having a high number of variable
34/// declarations. The default is `-1` (ignore the number of variables).
35class FunctionSizeCheck : public ClangTidyCheck {
36public:
37 FunctionSizeCheck(StringRef Name, ClangTidyContext *Context);
38
39 void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
40 void registerMatchers(ast_matchers::MatchFinder *Finder) override;
41 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
42
43private:
44 const std::optional<unsigned> LineThreshold;
45 const std::optional<unsigned> StatementThreshold;
46 const std::optional<unsigned> BranchThreshold;
47 const std::optional<unsigned> ParameterThreshold;
48 const std::optional<unsigned> NestingThreshold;
49 const std::optional<unsigned> VariableThreshold;
50
51 static constexpr std::optional<unsigned> DefaultLineThreshold = std::nullopt;
52 static constexpr std::optional<unsigned> DefaultStatementThreshold = 800U;
53 static constexpr std::optional<unsigned> DefaultBranchThreshold =
54 std::nullopt;
55 static constexpr std::optional<unsigned> DefaultParameterThreshold =
56 std::nullopt;
57 static constexpr std::optional<unsigned> DefaultNestingThreshold =
58 std::nullopt;
59 static constexpr std::optional<unsigned> DefaultVariableThreshold =
60 std::nullopt;
61};
62
63} // namespace clang::tidy::readability
64
65#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_FUNCTIONSIZECHECK_H
66

source code of clang-tools-extra/clang-tidy/readability/FunctionSizeCheck.h