JonasToth added inline comments.
================
Comment at: clang-tools-extra/clang-tidy/zircon/NoStdNamespaceCheck.cpp:29
+AST_MATCHER(NamespaceAliasDecl, isAliasedToStd) {
+ if (const auto *AN = Node.getAliasedNamespace()) {
+ // If this aliases to an actual namespace, check if its std. If it doesn't,
----------------
please do not use `auto` here as the type is not clear, same below (line 32
right now)
================
Comment at: clang-tools-extra/clang-tidy/zircon/NoStdNamespaceCheck.cpp:31
+ // If this aliases to an actual namespace, check if its std. If it doesn't,
+ // it aliases to another alias and thus shouldn't be flagged.
+ if (const auto *N = dyn_cast<NamespaceDecl>(AN))
----------------
The second sentence sounds a bit weird. I think you can even ellide it
completely, as the first sentence does clarify quite well.
================
Comment at: clang-tools-extra/clang-tidy/zircon/NoStdNamespaceCheck.cpp:71
+void NoStdNamespaceCheck::check(const MatchFinder::MatchResult &Result) {
+ if (const auto *D = Result.Nodes.getNodeAs<ValueDecl>("stdVar"))
+ diag(D->getBeginLoc(),
----------------
Please create a `StringRef` for the diagnostic message and reuse that.
Did you consider merging all `Decl` classes if you just use
`getNodeAs<Decl>("common_decl_name")`?
================
Comment at: clang-tools-extra/clang-tidy/zircon/NoStdNamespaceCheck.h:1
+//===--- NoStdNamespace.h - clang-tidy---------------------------*- C++
-*-===//
+//
----------------
There was a bug in the template, please add a blank after `clang-tidy` but keep
the total length.
================
Comment at: clang-tools-extra/clang-tidy/zircon/ZirconTidyModule.cpp:28
"zircon-temporary-objects");
+ CheckFactories.registerCheck<NoStdNamespaceCheck>(
+ "zircon-no-std-namespace");
----------------
please keep lexigraphical ordering.
================
Comment at:
clang-tools-extra/docs/clang-tidy/checks/zircon-no-std-namespace.rst:1
+.. title:: clang-tidy - zircon-no-std-namespace
+
----------------
Could you please clarify what exactly is forbidden?
__Using__ stuff from `std` like `std::string` in normal "user" code or
__opening__ `std` to add stuff?
If the first thing is the case why are the variables flagged but not the
functions? And adding things to namespace `std` is AFAIK UB with the exception
of template-function specializations, so maybe that would be worth a general
check?
================
Comment at: clang-tools-extra/test/clang-tidy/zircon-no-std-namespace.cpp:33
+int x = func();
+std::std_int y;
+// CHECK-MESSAGES: :[[@LINE-1]]:1: warning: use of the 'std' namespace is not
allowed in Zircon kernel code
----------------
What about using `int64_t` and these typedefs. Are they forbidden, too?
Repository:
rCTE Clang Tools Extra
https://reviews.llvm.org/D53882
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