https://github.com/vbvictor created
https://github.com/llvm/llvm-project/pull/143554
None
>From 5c975c6b59c02b0464a9bfc1b424b89b4d7dd662 Mon Sep 17 00:00:00 2001
From: Victor Baranov <bar.victor.2...@gmail.com>
Date: Tue, 10 Jun 2025 18:27:12 +0300
Subject: [PATCH] [clang-tidy] add 'IgnoreMarcos' option to 'avoid-goto' check
---
.../cppcoreguidelines/AvoidGotoCheck.cpp | 17 ++++++-
.../cppcoreguidelines/AvoidGotoCheck.h | 7 ++-
.../checks/cppcoreguidelines/avoid-goto.rst | 9 ++++
.../checkers/cppcoreguidelines/avoid-goto.cpp | 50 ++++++++++++++++---
4 files changed, 72 insertions(+), 11 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.cpp
b/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.cpp
index 8ffa44d41fa98..00864b1d69618 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.cpp
@@ -17,8 +17,20 @@ namespace {
AST_MATCHER(GotoStmt, isForwardJumping) {
return Node.getBeginLoc() < Node.getLabel()->getBeginLoc();
}
+
+AST_MATCHER(GotoStmt, isInMacro) {
+ return Node.getBeginLoc().isMacroID() && Node.getEndLoc().isMacroID();
+}
} // namespace
+AvoidGotoCheck::AvoidGotoCheck(StringRef Name, ClangTidyContext *Context)
+ : ClangTidyCheck(Name, Context),
+ IgnoreMacros(Options.get("IgnoreMacros", true)) {}
+
+void AvoidGotoCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
+ Options.store(Opts, "IgnoreMacros", IgnoreMacros);
+}
+
void AvoidGotoCheck::registerMatchers(MatchFinder *Finder) {
// TODO: This check does not recognize `IndirectGotoStmt` which is a
// GNU extension. These must be matched separately and an AST matcher
@@ -29,7 +41,10 @@ void AvoidGotoCheck::registerMatchers(MatchFinder *Finder) {
auto Loop = mapAnyOf(forStmt, cxxForRangeStmt, whileStmt, doStmt);
auto NestedLoop = Loop.with(hasAncestor(Loop));
- Finder->addMatcher(gotoStmt(anyOf(unless(hasAncestor(NestedLoop)),
+ const ast_matchers::internal::Matcher<GotoStmt> Anything = anything();
+
+ Finder->addMatcher(gotoStmt(IgnoreMacros ? unless(isInMacro()) : Anything,
+ anyOf(unless(hasAncestor(NestedLoop)),
unless(isForwardJumping())))
.bind("goto"),
this);
diff --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.h
b/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.h
index 883ba78855e7c..8eae409462c91 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.h
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.h
@@ -20,13 +20,16 @@ namespace clang::tidy::cppcoreguidelines {
///
http://clang.llvm.org/extra/clang-tidy/checks/cppcoreguidelines/avoid-goto.html
class AvoidGotoCheck : public ClangTidyCheck {
public:
- AvoidGotoCheck(StringRef Name, ClangTidyContext *Context)
- : ClangTidyCheck(Name, Context) {}
+ AvoidGotoCheck(StringRef Name, ClangTidyContext *Context);
bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
return LangOpts.CPlusPlus;
}
+ void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
void registerMatchers(ast_matchers::MatchFinder *Finder) override;
void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+
+private:
+ const bool IgnoreMacros;
};
} // namespace clang::tidy::cppcoreguidelines
diff --git
a/clang-tools-extra/docs/clang-tidy/checks/cppcoreguidelines/avoid-goto.rst
b/clang-tools-extra/docs/clang-tidy/checks/cppcoreguidelines/avoid-goto.rst
index 71b579a4ae99e..823b3c376e6d0 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/cppcoreguidelines/avoid-goto.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/cppcoreguidelines/avoid-goto.rst
@@ -50,3 +50,12 @@ Modern C++ needs ``goto`` only to jump out of nested loops.
some_operation();
All other uses of ``goto`` are diagnosed in `C++`.
+
+
+Options
+-------
+
+.. option:: IgnoreMacros
+
+ If set to `true`, the check will not warn if both label and ``goto``
+ statement are placed inside a macro. Default is `true`.
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/avoid-goto.cpp
b/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/avoid-goto.cpp
index ee236bc44695a..9a95b21cf3411 100644
---
a/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/avoid-goto.cpp
+++
b/clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/avoid-goto.cpp
@@ -1,12 +1,13 @@
// RUN: %check_clang_tidy %s cppcoreguidelines-avoid-goto %t
+// RUN: %check_clang_tidy -check-suffix=,MACRO %s cppcoreguidelines-avoid-goto
%t -- -config="{CheckOptions: { cppcoreguidelines-avoid-goto.IgnoreMacros:
false }}"
void noop() {}
int main() {
noop();
goto jump_to_me;
- // CHECK-NOTES: [[@LINE-1]]:3: warning: avoid using 'goto' for flow control
- // CHECK-NOTES: [[@LINE+3]]:1: note: label defined here
+ // CHECK-MESSAGES: [[@LINE-1]]:3: warning: avoid using 'goto' for flow
control
+ // CHECK-MESSAGES: [[@LINE+3]]:1: note: label defined here
noop();
jump_to_me:;
@@ -14,14 +15,14 @@ jump_to_me:;
jump_backwards:;
noop();
goto jump_backwards;
- // CHECK-NOTES: [[@LINE-1]]:3: warning: avoid using 'goto' for flow control
- // CHECK-NOTES: [[@LINE-4]]:1: note: label defined here
+ // CHECK-MESSAGES: [[@LINE-1]]:3: warning: avoid using 'goto' for flow
control
+ // CHECK-MESSAGES: [[@LINE-4]]:1: note: label defined here
goto jump_in_line;
;
jump_in_line:;
- // CHECK-NOTES: [[@LINE-3]]:3: warning: avoid using 'goto' for flow control
- // CHECK-NOTES: [[@LINE-2]]:1: note: label defined here
+ // CHECK-MESSAGES: [[@LINE-3]]:3: warning: avoid using 'goto' for flow
control
+ // CHECK-MESSAGES: [[@LINE-2]]:1: note: label defined here
// Test the GNU extension
https://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html
some_label:;
@@ -132,8 +133,41 @@ void jump_out_backwards() {
for (int j = 0; j < 10; ++j) {
if (i * j > 80)
goto before_the_loop;
- // CHECK-NOTES: [[@LINE-1]]:9: warning: avoid using 'goto' for flow
control
- // CHECK-NOTES: [[@LINE-8]]:1: note: label defined here
+ // CHECK-MESSAGES: [[@LINE-1]]:9: warning: avoid using 'goto' for flow
control
+ // CHECK-MESSAGES: [[@LINE-8]]:1: note: label defined here
}
}
}
+
+#define macro_goto_code \
+ noop(); \
+ goto jump_to_me; \
+ noop(); \
+jump_to_me:; \
+
+#define macro_goto_label jump_to_me:;
+#define macro_goto_jump goto jump_to_me;
+
+void inside_macro_all() {
+ macro_goto_code
+ // CHECK-MESSAGES-MACRO: [[@LINE-1]]:3: warning: avoid using 'goto' for flow
control
+ // CHECK-MESSAGES-MACRO: [[@LINE-2]]:3: note: label defined here
+}
+
+void inside_macro_label() {
+ noop();
+ goto jump_to_me;
+ // CHECK-MESSAGES: [[@LINE-1]]:3: warning: avoid using 'goto' for flow
control
+ // CHECK-MESSAGES: [[@LINE+2]]:3: note: label defined here
+ noop();
+ macro_goto_label
+}
+
+void inside_macro_goto() {
+ noop();
+ macro_goto_jump
+ // CHECK-MESSAGES-MACRO: [[@LINE-1]]:3: warning: avoid using 'goto' for flow
control
+ // CHECK-MESSAGES-MACRO: [[@LINE+2]]:3: note: label defined here
+ noop();
+ jump_to_me:;
+}
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