diff options
author | Hans Wennborg <hans@hanshq.net> | 2019-02-07 11:04:04 +0000 |
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committer | Hans Wennborg <hans@hanshq.net> | 2019-02-07 11:04:04 +0000 |
commit | ed4e2ec42201e8e3c9164993d3f1b52b5d5a3951 (patch) | |
tree | 2991d4df3a302d349145bae2faed562d793b2194 | |
parent | f41725ff15ce6971838ae569afa25f05283ab5fc (diff) |
Merging r353327:
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r353327 | lebedevri | 2019-02-06 20:17:30 +0100 (Wed, 06 Feb 2019) | 18 lines
[clang-tidy] modernize-avoid-c-arrays: avoid main function (PR40604)
Summary:
The check should ignore the main function, the program entry point.
It is not possible to use `std::array<>` for the `argv`.
The alternative is to use `char** argv`.
Fixes [[ https://bugs.llvm.org/show_bug.cgi?id=40604 | PR40604 ]]
Reviewers: JonasToth, aaron.ballman
Reviewed By: aaron.ballman
Subscribers: xazax.hun, hans, cfe-commits
Tags: #clang-tools-extra, #clang
Differential Revision: https://reviews.llvm.org/D57787
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git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/branches/release_80@353391 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed, 50 insertions, 1 deletions
diff --git a/clang-tidy/modernize/AvoidCArraysCheck.cpp b/clang-tidy/modernize/AvoidCArraysCheck.cpp index dd194832..6ef45ee8 100644 --- a/clang-tidy/modernize/AvoidCArraysCheck.cpp +++ b/clang-tidy/modernize/AvoidCArraysCheck.cpp @@ -31,6 +31,12 @@ AST_MATCHER(clang::RecordDecl, isExternCContext) { return Node.isExternCContext(); } +AST_MATCHER(clang::ParmVarDecl, isArgvOfMain) { + const clang::DeclContext *DC = Node.getDeclContext(); + const auto *FD = llvm::dyn_cast<clang::FunctionDecl>(DC); + return FD ? FD->isMain() : false; +} + } // namespace namespace clang { @@ -44,7 +50,8 @@ void AvoidCArraysCheck::registerMatchers(MatchFinder *Finder) { Finder->addMatcher( typeLoc(hasValidBeginLoc(), hasType(arrayType()), - unless(anyOf(hasParent(varDecl(isExternC())), + unless(anyOf(hasParent(parmVarDecl(isArgvOfMain())), + hasParent(varDecl(isExternC())), hasParent(fieldDecl( hasParent(recordDecl(isExternCContext())))), hasAncestor(functionDecl(isExternC()))))) diff --git a/docs/clang-tidy/checks/modernize-avoid-c-arrays.rst b/docs/clang-tidy/checks/modernize-avoid-c-arrays.rst index 8f856a52..d7bc7474 100644 --- a/docs/clang-tidy/checks/modernize-avoid-c-arrays.rst +++ b/docs/clang-tidy/checks/modernize-avoid-c-arrays.rst @@ -54,3 +54,7 @@ such headers between C code, and C++ code. } } + +Similarly, the ``main()`` function is ignored. Its second and third parameters +can be either ``char* argv[]`` or ``char** argv``, but can not be +``std::array<>``. diff --git a/test/clang-tidy/modernize-avoid-c-arrays-ignores-main.cpp b/test/clang-tidy/modernize-avoid-c-arrays-ignores-main.cpp new file mode 100644 index 00000000..6549422f --- /dev/null +++ b/test/clang-tidy/modernize-avoid-c-arrays-ignores-main.cpp @@ -0,0 +1,18 @@ +// RUN: %check_clang_tidy %s modernize-avoid-c-arrays %t + +int not_main(int argc, char *argv[]) { + // CHECK-MESSAGES: :[[@LINE-1]]:24: warning: do not declare C-style arrays, use std::array<> instead + int f4[] = {1, 2}; + // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not declare C-style arrays, use std::array<> instead +} + +int main(int argc, char *argv[]) { + int f5[] = {1, 2}; + // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not declare C-style arrays, use std::array<> instead + + auto not_main = [](int argc, char *argv[]) { + // CHECK-MESSAGES: :[[@LINE-1]]:32: warning: do not declare C-style arrays, use std::array<> instead + int f6[] = {1, 2}; + // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: do not declare C-style arrays, use std::array<> instead + }; +} diff --git a/test/clang-tidy/modernize-avoid-c-arrays-ignores-three-arg-main.cpp b/test/clang-tidy/modernize-avoid-c-arrays-ignores-three-arg-main.cpp new file mode 100644 index 00000000..22a4016f --- /dev/null +++ b/test/clang-tidy/modernize-avoid-c-arrays-ignores-three-arg-main.cpp @@ -0,0 +1,20 @@ +// RUN: %check_clang_tidy %s modernize-avoid-c-arrays %t + +int not_main(int argc, char *argv[], char *argw[]) { + // CHECK-MESSAGES: :[[@LINE-1]]:24: warning: do not declare C-style arrays, use std::array<> instead + // CHECK-MESSAGES: :[[@LINE-2]]:38: warning: do not declare C-style arrays, use std::array<> instead + int f4[] = {1, 2}; + // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not declare C-style arrays, use std::array<> instead +} + +int main(int argc, char *argv[], char *argw[]) { + int f5[] = {1, 2}; + // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not declare C-style arrays, use std::array<> instead + + auto not_main = [](int argc, char *argv[], char *argw[]) { + // CHECK-MESSAGES: :[[@LINE-1]]:32: warning: do not declare C-style arrays, use std::array<> instead + // CHECK-MESSAGES: :[[@LINE-2]]:46: warning: do not declare C-style arrays, use std::array<> instead + int f6[] = {1, 2}; + // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: do not declare C-style arrays, use std::array<> instead + }; +} |