Author: dhinton
Date: Wed May 15 09:58:58 2019
New Revision: 360785
URL: http://llvm.org/viewvc/llvm-project?rev=360785&view=rev
Log:
[clang-tidy] modernize-loop-convert: impl const cast iter
Summary:
modernize-loop-convert was not detecting implicit casts to
const_iterator as convertible to range-based loops:
std::vector<int> vec{1,2,3,4}
for(std::vector<int>::const_iterator i = vec.begin();
i != vec.end();
++i) { }
Thanks to Don Hinton for advice.
As well, this change adds a note for this check's applicability to code
targeting OpenMP prior to version 5 as this check will continue breaking
compilation with `-fopenmp`. Thanks to Roman Lebedev for pointing this
out.
Fixes PR#35082
Reviewed By: hintonda
Tags: #clang-tools-extra, #clang
Differential Revision: https://reviews.llvm.org/D61827
Modified:
clang-tools-extra/trunk/clang-tidy/modernize/LoopConvertCheck.cpp
clang-tools-extra/trunk/docs/clang-tidy/checks/modernize-loop-convert.rst
clang-tools-extra/trunk/docs/clang-tidy/index.rst
clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-basic.cpp
clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-extra.cpp
Modified: clang-tools-extra/trunk/clang-tidy/modernize/LoopConvertCheck.cpp
URL:
http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/clang-tidy/modernize/LoopConvertCheck.cpp?rev=360785&r1=360784&r2=360785&view=diff
==============================================================================
--- clang-tools-extra/trunk/clang-tidy/modernize/LoopConvertCheck.cpp (original)
+++ clang-tools-extra/trunk/clang-tidy/modernize/LoopConvertCheck.cpp Wed May
15 09:58:58 2019
@@ -791,11 +791,6 @@ bool LoopConvertCheck::isConvertible(AST
CanonicalBeginType->getPointeeType(),
CanonicalInitVarType->getPointeeType()))
return false;
- } else if (!Context->hasSameType(CanonicalInitVarType,
- CanonicalBeginType)) {
- // Check for qualified types to avoid conversions from non-const to const
- // iterator types.
- return false;
}
} else if (FixerKind == LFK_PseudoArray) {
// This call is required to obtain the container.
Modified:
clang-tools-extra/trunk/docs/clang-tidy/checks/modernize-loop-convert.rst
URL:
http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/docs/clang-tidy/checks/modernize-loop-convert.rst?rev=360785&r1=360784&r2=360785&view=diff
==============================================================================
--- clang-tools-extra/trunk/docs/clang-tidy/checks/modernize-loop-convert.rst
(original)
+++ clang-tools-extra/trunk/docs/clang-tidy/checks/modernize-loop-convert.rst
Wed May 15 09:58:58 2019
@@ -253,3 +253,15 @@ below ends up being performed at the `sa
flag = true;
}
}
+
+OpenMP
+^^^^^^
+
+As range-based for loops are only available since OpenMP 5, this check should
+not been used on code with a compatibility requirements of OpenMP prior to
+version 5. It is **intentional** that this check does not make any attempts to
+exclude incorrect diagnostics on OpenMP for loops prior to OpenMP 5.
+
+To prevent this check to be applied (and to break) OpenMP for loops but still
be
+applied to non-OpenMP for loops the usage of ``NOLINT`` (see
+:ref:`clang-tidy-nolint`) on the specific for loops is recommended.
Modified: clang-tools-extra/trunk/docs/clang-tidy/index.rst
URL:
http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/docs/clang-tidy/index.rst?rev=360785&r1=360784&r2=360785&view=diff
==============================================================================
--- clang-tools-extra/trunk/docs/clang-tidy/index.rst (original)
+++ clang-tools-extra/trunk/docs/clang-tidy/index.rst Wed May 15 09:58:58 2019
@@ -258,6 +258,8 @@ An overview of all the command-line opti
value: 'some value'
...
+.. _clang-tidy-nolint:
+
Suppressing Undesired Diagnostics
=================================
Modified:
clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-basic.cpp
URL:
http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-basic.cpp?rev=360785&r1=360784&r2=360785&view=diff
==============================================================================
--- clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-basic.cpp
(original)
+++ clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-basic.cpp
Wed May 15 09:58:58 2019
@@ -369,7 +369,7 @@ void f() {
// CHECK-FIXES: for (auto Val_int_ptr : Val_int_ptrs)
}
- // This container uses an iterator where the derefence type is a typedef of
+ // This container uses an iterator where the dereference type is a typedef of
// a reference type. Make sure non-const auto & is still used. A failure here
// means canonical types aren't being tested.
{
@@ -431,19 +431,22 @@ void different_type() {
// CHECK-FIXES: for (auto P : *Ps)
// CHECK-FIXES-NEXT: printf("s has value %d\n", P.X);
- // V.begin() returns a user-defined type 'iterator' which, since it's
- // different from const_iterator, disqualifies these loops from
- // transformation.
dependent<int> V;
for (dependent<int>::const_iterator It = V.begin(), E = V.end();
It != E; ++It) {
printf("Fibonacci number is %d\n", *It);
}
+ // CHECK-MESSAGES: :[[@LINE-4]]:3: warning: use range-based for loop instead
+ // CHECK-FIXES: for (int It : V)
+ // CHECK-FIXES-NEXT: printf("Fibonacci number is %d\n", It);
for (dependent<int>::const_iterator It(V.begin()), E = V.end();
It != E; ++It) {
printf("Fibonacci number is %d\n", *It);
}
+ // CHECK-MESSAGES: :[[@LINE-4]]:3: warning: use range-based for loop instead
+ // CHECK-FIXES: for (int It : V)
+ // CHECK-FIXES-NEXT: printf("Fibonacci number is %d\n", It);
}
// Tests to ensure that an implicit 'this' is picked up as the container.
Modified:
clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-extra.cpp
URL:
http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-extra.cpp?rev=360785&r1=360784&r2=360785&view=diff
==============================================================================
--- clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-extra.cpp
(original)
+++ clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-extra.cpp
Wed May 15 09:58:58 2019
@@ -776,17 +776,20 @@ void different_type() {
// CHECK-FIXES: for (auto P : *Ps)
// CHECK-FIXES-NEXT: printf("s has value %d\n", P.X);
- // V.begin() returns a user-defined type 'iterator' which, since it's
- // different from const_iterator, disqualifies these loops from
- // transformation.
dependent<int> V;
for (dependent<int>::const_iterator It = V.begin(); It != V.end(); ++It) {
printf("Fibonacci number is %d\n", *It);
}
+ // CHECK-MESSAGES: :[[@LINE-3]]:3: warning: use range-based for loop instead
+ // CHECK-FIXES: for (int It : V)
+ // CHECK-FIXES-NEXT: printf("Fibonacci number is %d\n", It);
for (dependent<int>::const_iterator It(V.begin()); It != V.end(); ++It) {
printf("Fibonacci number is %d\n", *It);
}
+ // CHECK-MESSAGES: :[[@LINE-3]]:3: warning: use range-based for loop instead
+ // CHECK-FIXES: for (int It : V)
+ // CHECK-FIXES-NEXT: printf("Fibonacci number is %d\n", It);
}
} // namespace SingleIterator
@@ -991,18 +994,26 @@ void iterators() {
// CHECK-FIXES: for (int & I : Dep)
// CHECK-FIXES-NEXT: auto H2 = [&]() { int R = I + 2; };
- // FIXME: It doesn't work with const iterators.
for (dependent<int>::const_iterator I = Dep.begin(), E = Dep.end();
I != E; ++I)
auto H3 = [I]() { int R = *I; };
+ // CHECK-MESSAGES: :[[@LINE-3]]:3: warning: use range-based for loop instead
+ // CHECK-FIXES: for (int I : Dep)
+ // CHECK-FIXES-NEXT: auto H3 = [&I]() { int R = I; };
for (dependent<int>::const_iterator I = Dep.begin(), E = Dep.end();
I != E; ++I)
auto H4 = [&]() { int R = *I + 1; };
+ // CHECK-MESSAGES: :[[@LINE-3]]:3: warning: use range-based for loop instead
+ // CHECK-FIXES: for (int I : Dep)
+ // CHECK-FIXES-NEXT: auto H4 = [&]() { int R = I + 1; };
for (dependent<int>::const_iterator I = Dep.begin(), E = Dep.end();
I != E; ++I)
auto H5 = [=]() { int R = *I; };
+ // CHECK-MESSAGES: :[[@LINE-3]]:3: warning: use range-based for loop instead
+ // CHECK-FIXES: for (int R : Dep)
+ // CHECK-FIXES-NEXT: auto H5 = [=]() { };
}
void captureByValue() {
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