[clang-format] fix regression recognizing casts in Obj-C calls
Summary:
r373922 added checks for a few tokens that, following an `)` make it
unlikely that the `)` is the closing paren of a cast expression. The
specific check for `tok::l_square` there introduced a regression for
casts of Obj-C calls, like:
```
(cast)[func arg]
```
From the tests added in r373922, I believe the `tok::l_square` case is added to
capture the case where a non-cast `)` is directly followed by an
attribute specifier, like:
```
int f(int x) [[noreturn]];
```
I've specialized the code to look for such attribute specifier instead
of `tok::l_square` in general. Also, I added a regression test and moved
the test cases added in r373922 to an already existing place documenting
other instances of historically misidentified casts.
Reviewers: MyDeveloperDay
Reviewed By: MyDeveloperDay
Subscribers: cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D69164
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@375247 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Format/TokenAnnotator.cpp b/lib/Format/TokenAnnotator.cpp
index 9823a5a..7aa1f37 100644
--- a/lib/Format/TokenAnnotator.cpp
+++ b/lib/Format/TokenAnnotator.cpp
@@ -1607,8 +1607,9 @@
// Functions which end with decorations like volatile, noexcept are unlikely
// to be casts.
if (Tok.Next->isOneOf(tok::kw_noexcept, tok::kw_volatile, tok::kw_const,
- tok::kw_throw, tok::l_square, tok::arrow,
- Keywords.kw_override, Keywords.kw_final))
+ tok::kw_throw, tok::arrow, Keywords.kw_override,
+ Keywords.kw_final) ||
+ isCpp11AttributeSpecifier(*Tok.Next))
return false;
// As Java has no function types, a "(" after the ")" likely means that this
diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index b0d7f08..19269b2 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -7541,6 +7541,8 @@
verifyFormat("my_int a = (ns::my_int)-2;");
verifyFormat("case (my_int)ONE:");
verifyFormat("auto x = (X)this;");
+ // Casts in Obj-C style calls used to not be recognized as such.
+ verifyFormat("int a = [(type*)[((type*)val) arg] arg];", getGoogleStyle());
// FIXME: single value wrapped with paren will be treated as cast.
verifyFormat("void f(int i = (kValue)*kMask) {}");
@@ -7581,6 +7583,29 @@
verifyFormat("int a = alignof(int *) + b;", getGoogleStyle());
verifyFormat("bool b = f(g<int>) && c;");
verifyFormat("typedef void (*f)(int i) func;");
+ verifyFormat("void operator++(int) noexcept;");
+ verifyFormat("void operator++(int &) noexcept;");
+ verifyFormat("void operator delete(void *, std::size_t, const std::nothrow_t "
+ "&) noexcept;");
+ verifyFormat(
+ "void operator delete(std::size_t, const std::nothrow_t &) noexcept;");
+ verifyFormat("void operator delete(const std::nothrow_t &) noexcept;");
+ verifyFormat("void operator delete(std::nothrow_t &) noexcept;");
+ verifyFormat("void operator delete(nothrow_t &) noexcept;");
+ verifyFormat("void operator delete(foo &) noexcept;");
+ verifyFormat("void operator delete(foo) noexcept;");
+ verifyFormat("void operator delete(int) noexcept;");
+ verifyFormat("void operator delete(int &) noexcept;");
+ verifyFormat("void operator delete(int &) volatile noexcept;");
+ verifyFormat("void operator delete(int &) const");
+ verifyFormat("void operator delete(int &) = default");
+ verifyFormat("void operator delete(int &) = delete");
+ verifyFormat("void operator delete(int &) [[noreturn]]");
+ verifyFormat("void operator delete(int &) throw();");
+ verifyFormat("void operator delete(int &) throw(int);");
+ verifyFormat("auto operator delete(int &) -> int;");
+ verifyFormat("auto operator delete(int &) override");
+ verifyFormat("auto operator delete(int &) final");
verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *foo = (aaaaaaaaaaaaaaaaa *)\n"
" bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;");
@@ -14696,33 +14721,6 @@
*/
}
-TEST_F(FormatTest, NotCastRPaen) {
-
- verifyFormat("void operator++(int) noexcept;");
- verifyFormat("void operator++(int &) noexcept;");
- verifyFormat("void operator delete(void *, std::size_t, const std::nothrow_t "
- "&) noexcept;");
- verifyFormat(
- "void operator delete(std::size_t, const std::nothrow_t &) noexcept;");
- verifyFormat("void operator delete(const std::nothrow_t &) noexcept;");
- verifyFormat("void operator delete(std::nothrow_t &) noexcept;");
- verifyFormat("void operator delete(nothrow_t &) noexcept;");
- verifyFormat("void operator delete(foo &) noexcept;");
- verifyFormat("void operator delete(foo) noexcept;");
- verifyFormat("void operator delete(int) noexcept;");
- verifyFormat("void operator delete(int &) noexcept;");
- verifyFormat("void operator delete(int &) volatile noexcept;");
- verifyFormat("void operator delete(int &) const");
- verifyFormat("void operator delete(int &) = default");
- verifyFormat("void operator delete(int &) = delete");
- verifyFormat("void operator delete(int &) [[noreturn]]");
- verifyFormat("void operator delete(int &) throw();");
- verifyFormat("void operator delete(int &) throw(int);");
- verifyFormat("auto operator delete(int &) -> int;");
- verifyFormat("auto operator delete(int &) override");
- verifyFormat("auto operator delete(int &) final");
-}
-
TEST_F(FormatTest, STLWhileNotDefineChed) {
verifyFormat("#if defined(while)\n"
"#define while EMIT WARNING C4005\n"
