Summary:
Checker to validate string constructor parameters.
A common mistake is to swap parameter for the fill-constructor.
```
std::string str('x', 4);
std::string str('4', x);
```
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D19146
llvm-svn: 267011
Summary:
Little cleanup to lift-out and to remove some frequently used
ast-matchers.
Some of theses matchers are candidates to be lifted to ASTMatchers.h.
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D19200
llvm-svn: 267003
Summary:
Clang-tidy modernize-raw-string-literal check crashes on run-time assert while it is evaluating compiler predefined identifiers such as
- __FUNCTION__
- __func__
- __PRETTY_FUNCTION__
Check is asserting because it cannot find opening quote for such string literal. It occurs only on debug build config.
I think that it would be good to prune such cases by crossing off predefined expressions - there is no need to evaluate such matches.
Reviewers: LegalizeAdulthood, alexfh
Subscribers: cfe-commits
Patch by Marek Jenda!
Differential Revision: http://reviews.llvm.org/D19331
llvm-svn: 266992
Summary: Fixes a crash in cppcoreguidelines-pro-type-member-init when checking some record types with a constructor without a body. We now check to make sure the constructor has a body before looking for missing members and base initializers.
Patch by Michael Miller!
Reviewers: aaron.ballman, alexfh, hokein
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D19270
llvm-svn: 266862
Summary:
The string class contains methods which support receiving either a string literal or a string object.
For example, calls to append can receive either a char* or a string.
```
string& append (const string& str);
string& append (const char* s);
```
Which make these cases equivalent, and the .c_str() useless:
```
std::string s = "123";
str.append(s);
str.append(s.c_str());
```
In these cases, removing .c_str() doesn't provide any size or speed improvement.
It's only a readability issue.
If the string contains embedded NUL characters, the string literal and the string
object won't produce the same semantic.
Reviewers: alexfh, sbenza
Subscribers: LegalizeAdulthood, aaron.ballman, chapuni, Eugene.Zelenko, cfe-commits
Differential Revision: http://reviews.llvm.org/D18475
llvm-svn: 266463
Summary:
The check detects multi-statement macros that are used in unbraced conditionals.
Only the first statement will be part of the conditionals and the rest will fall
outside of it and executed unconditionally.
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D18766
llvm-svn: 266369
Summary: Added the remaining features needed to satisfy C++ Core Guideline Type.6: Always initialize a member variable to cppcoreguidelines-pro-type-member-init. The check now flags all default-constructed uses of record types without user-provided default constructors that would leave their memory in an undefined state. The check suggests value initializing them instead.
Reviewers: flx, alexfh, aaron.ballman
Subscribers: klimek, aaron.ballman, LegalizeAdulthood, cfe-commits
Patch by Michael Miller!
Differential Revision: http://reviews.llvm.org/D18584
llvm-svn: 266191
Checks if constructors and assignment operators that are marked '= default' are
actually deleted by the compiler.
Patch by Alex Pilkiewicz!
Differential Revision: http://reviews.llvm.org/D18961
llvm-svn: 266190
Summary:
The Fix-Its for the added test cases were before:
-void F11(const unsigned int /*version*/);
+void F11(unsigned int int /*version*/);
-void F12(const bool b = true);
+void F12(_Bool true);
Reviewers: fowles, hokein, sbenza, alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D18993
llvm-svn: 266044
Summary:
This check flags initializers of globals that access extern objects, and therefore can lead to order-of-initialization problems (this recommandation is part of CPP core guidelines).
Note that this only checks half of the guideline for now (it does not enforce using constexpr functions).
Reviewers: aaron.ballman, alexfh
Subscribers: aaron.ballman, etienneb, Eugene.Zelenko, cfe-commits
Patch by Clement Courbet!
Differential Revision: http://reviews.llvm.org/D18649
llvm-svn: 265774
Summary:
This patch adds the support for detecting suspicious string
literals and their //incorrect// usage.
The following example shows a incorrect character escaping leading
to an embedded NUL character.
```
std::string str = "\0x42"; // Should be "\x42".
```
The patch also add detection of truncated literal when a literal
is passed to a string constructor.
Reviewers: hokein, alexfh
Subscribers: LegalizeAdulthood, bcraig, Eugene.Zelenko, bkramer, cfe-commits
Differential Revision: http://reviews.llvm.org/D18783
llvm-svn: 265691
Summary:
This is the same kind of bug than [[ http://reviews.llvm.org/D18238 | D18238 ]].
Fix crashes caused by deferencing null pointer when declarations parsing may be delayed.
The body of the declarations may be null.
The crashes were observed with a Windows build of clang-tidy and the following command-line.
```
command-line switches: -fms-compatibility-version=19 -fms-compatibility
```
Reviewers: alexfh
Subscribers: kimgr, LegalizeAdulthood, cfe-commits
Differential Revision: http://reviews.llvm.org/D18852
llvm-svn: 265681
Going through a string removes some of the smarts of the diagnosic printer
and makes the code more complicated. This change has some cosmetic impact
on the output but that's mostly minor.
llvm-svn: 265680
Summary:
In Release mode, the check was infinite looping over chromium code base.
It seems there is something strange with the creation of the Maps.
I believe the compiler is making some assumption with the implicit conversion from enum <-> int.
By moving the map to a standard switch/cases, we no longer allocate memory and we can keep the same behavior. For a small amount of elements, this is fine.
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D18833
llvm-svn: 265679
Summary:
Clang-tidy is reporting a warning of redundant string initialisation
on a string parameter initialized with empty string.
See bug: 27087
The reported example is:
```
#include <string>
void fn(std::string a = "");
```
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D18829
llvm-svn: 265671
Summary:
Existing checker misc-misplaced-widening-cast was extended:
- New use cases: casted expression as lhs or rhs of a logical comparison or function argument
- New types: beside int, long and long long various char types, short and int128 added
- New option to check implicit casts: forgetting a cast is at least as common and as dangerous as misplacing it. This option can be disabled.
This patch depends on AST Matcher patches D17986 and D18243 and also contains fix for checker misc-bool-pointer-implicit-conversion needed because of the fix in the AST Matcher patch.
Reviewers: hokein, alexfh
Subscribers: o.gyorgy, xazax.hun, cfe-commits
Differential Revision: http://reviews.llvm.org/D17987
llvm-svn: 265532
Summary:
This patch is adding detection of common string literal patterns
that should not trigger warnings.
[*] Add a limit on the number of concatenated token,
[*] Add support for parenthese sequence of tokens,
[*] Add detection of valid indentation.
As an example, this code will no longer trigger a warning:
```
const char* Array[] = {
"first literal"
"indented literal"
"indented literal",
"second literal",
[...]
```
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D18695
llvm-svn: 265303
Fix for __declspec attributes and const=0 without space
This patch is to address 2 problems I found with Clang-tidy:modernize-use-override.
1: missing spaces on pure function decls.
Orig:
void pure() const=0
Problem:
void pure() constoverride =0
Fixed:
void pure() const override =0
2: This is ms-extension specific, but possibly applies to other attribute types. The override is placed before the attribute which doesn’t work well with declspec as this attribute can be inherited or placed before the method identifier.
Orig:
class __declspec(dllexport) X : public Y
{
void p();
};
Problem:
class override __declspec(dllexport) class X : public Y
{
void p();
};
Fixed:
class __declspec(dllexport) class X : public Y
{
void p() override;
};
Patch by Robert Bolter!
Differential Revision: http://reviews.llvm.org/D18396
llvm-svn: 265298
Summary: Adds a clang-tidy warning for top-level consts in function declarations.
Reviewers: hokein, sbenza, alexfh
Subscribers: cfe-commits
Patch by Matt Kulukundis!
Differential Revision: http://reviews.llvm.org/D18408
llvm-svn: 264856
Summary:
Add check misc-dangling-handle to detect dangling references in value
handlers like std::experimental::string_view.
It provides a configuration option to specify other handle types that
should also be checked.
Right now it detects:
- Construction from temporaries.
- Assignment from temporaries.
- Return statements from temporaries or locals.
- Insertion into containers from temporaries.
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D17811
llvm-svn: 264759
Summary:
The current checker is able to recognize std::string but does not recognize other string variants.
This patch is adding the support for any string defined with basic_string without considering the
the underlying char type.
The most common variant is: 'std::wstring' based on 'wchar_t'.
There are also other string variants added to the standard: u16string, u32string, etc...
Reviewers: alexfh
Subscribers: mamai, dblaikie, cfe-commits
Differential Revision: http://reviews.llvm.org/D18412
llvm-svn: 264325
The return value of every assign operator should be Type&, not only for copy and move assign operators.
Patch by Adam Balogh!
Reviewers: hokein, alexfh
Differential Revision: http://reviews.llvm.org/D18264
llvm-svn: 264251
Summary: Extends the UnnecessaryCopyInitialization to detect copies of local variables and parameters that are unneeded.
Patch by Matt Kulukundis!
Reviewers: alexfh, hokein
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D18149
llvm-svn: 264146
Summary:
The string constructors are not defined using optional parameters and are not recognize by the checker.
The constructor defined in the MSVC header is defined with 1 parameter. Therefore, patterns are not recognized by the checker.
The current patch add support to accept constructor with only one parameter.
Repro on a Visual Studio 14 installation with the following code:
```
void f1(const std::string &s) {
f1(s.c_str());
}
```
In the xstring.h header, the constructors are defined this way:
```
basic_string(const _Myt& _Right) [...]
basic_string(const _Myt& _Right, const _Alloc& _Al) [...]
```
The CXXConstructExpr to recognize only contains 1 parameter.
```
CXXConstructExpr 0x3f1a070 <C:\src\llvm\examples\test.cc:6:6, col:14> 'const std::string':'const class std::basic_string<char, struct std::char_traits<char>, class
std::allocator<char> >' 'void (const char *) __attribute__((thiscall))'
`-CXXMemberCallExpr 0x3f1a008 <col:6, col:14> 'const char *'
`-MemberExpr 0x3f19fe0 <col:6, col:8> '<bound member function type>' .c_str 0x3cc22f8
`-DeclRefExpr 0x3f19fc8 <col:6> 'const std::string':'const class std::basic_string<char, struct std::char_traits<char>, class std::allocator<char> >' lvalue ParmVar 0x3f19c80 's' 'const std::string &'
```
Reviewers: aaron.ballman, alexfh
Subscribers: aemerson
Differential Revision: http://reviews.llvm.org/D18285
llvm-svn: 264075
Summary:
Invalid source location are causing clang-tidy to crash when manipulating an invalid file.
Macro definitions on the command line have locations in a virtual buffer and therefore
don't have a corresponding valid FilePath.
A recent patch added path conversion to absolute path. As the FilePath may now be empty,
the result of makeAbsolutePath may incorrectly be the folder WorkingDir. The crash occurs
in getLocation which is not able to find the appropriate FileEntry (null pointer).
```
SmallString<128> FixAbsoluteFilePath = Fix.getFilePath();
Files.makeAbsolutePath(FixAbsoluteFilePath);
FixLoc = getLocation(FixAbsoluteFilePath, Fix.getOffset());
```
With relative path, the code was not crashing because getLocation was skipping empty path.
Example of code:
```
int main() { return X; }
```
With the given command-line:
```
clang-tidy test.cc --checks=misc-macro-* -- -DX=0+0
```
Reviewers: alexfh, aaron.ballman
Subscribers: aaron.ballman, cfe-commits
Differential Revision: http://reviews.llvm.org/D18262
llvm-svn: 264073
Summary:
The string constructors are not defined using optional parameters and are not recognized by the redundant-string-init checker.
The following patch fixes the redundant-string-init checker for the Visual Studio 14 headers file.
The matcher now accept both variant (with 1 and 2 parameters).
Also added new unittests.
Similar issue than: [[ http://reviews.llvm.org/D18285 | review ]]
In the xstring.h header, the constructors are defined this way:
```
basic_string(const _Myt& _Right) [...]
basic_string(const _Myt& _Right, const _Alloc& _Al) [...]
```
Reviewers: alexfh, hokein
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D18293
llvm-svn: 264069
matchesName() uses regular expressions and it is very slow.
hasAnyName() gives the same result and it is much faster.
A benchmark (with all the checks enabled) shows a ~5% speed up of
clang-tidy.
llvm-svn: 263822
Summary:
Fix assertion failure: "Name is not a simple identifier".
`Decl::GetName` assumes the name should be an identifier. When the check
processes the function calling statement with speciail key name like
'it.operator->()', it will trigger the assert in `GetName`.
Rather than using `Decl::GetName`, we use `getNameAsString` which works
with special key names in C++.
Reviewers: bkramer
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D18141
llvm-svn: 263426
Summary:
Move code shared between UnnecessaryCopyInitialization and ForRangeCopyCheck into utilities files.
Add more test cases for UnnecessaryCopyInitialization and disable fixes inside of macros.
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D17488
llvm-svn: 262781
This doesn't really do much at the moment. You can load it via libclang
and set the -checks via an extra command line argument as illustrated in
the test case. Support for other options (including headers check) is
currently missing. Also when using this with libclang some checks may
not work with the precompiled preamble in place.
This can be used to easily show clang-tidy warnings in an editor
integration as all that's needed is adding command line flags that are
passed into libclang. Warnings and FixIts are exposed via the existing
CXDiagnostic machinery.
Differential Revision: http://reviews.llvm.org/D17807
llvm-svn: 262595
It was failing to build with:
clang-tidy\readability\IdentifierNamingCheck.cpp(640):
error C2882: 'format' : illegal use of namespace identifier in expression
llvm-svn: 262257
Summary:
The clang-tidy will trigger an assertion if it's not in the building directory.
TEST:
cd <llvm-repo>/
./build/bin/clang-tidy --checks=-*,modernize-use-nullptr -p build tools/clang/tools/extra/clang-tidy/ClangTidy.cpp
The crash issue is gone after applying this patch.
Fixes PR24834, PR26241
Reviewers: bkramer, alexfh
Subscribers: rizsotto.mailinglist, cfe-commits
Differential Revision: http://reviews.llvm.org/D17335
llvm-svn: 261991
Summary: Because of the recent Google Code shutdown links to the Google Code Style up there are no longer relevant.
Reviewers: alexfh, hokein
Subscribers: cfe-commits
Patch by Kirill Bobyrev!
Differential Revision: http://reviews.llvm.org/D17602
llvm-svn: 261868
Summary:
This patch introduces the modernize-deprecated-headers check, which is supposed to replace deprecated C library headers with the C++ STL-ones.
For information see documentation; for exmaples see the test cases.
Reviewers: Eugene.Zelenko, LegalizeAdulthood, alexfh
Subscribers: cfe-commits
Patch by Kirill Bobyrev!
Differential Revision: http://reviews.llvm.org/D17484
llvm-svn: 261738
Adds a new check "misc-forward-declaration-namespace".
In check, A forward declaration is considerred in a potentially wrong namespace
if there is any definition/declaration with the same name exists in a different
namespace.
Reviewers: akuegel, hokein, alexfh
Patch by Eric Liu!
Differential Revision: http://reviews.llvm.org/D17195
llvm-svn: 261737
instead of a get() method we find in the class.
The duck typed smart pointer class could have overloaded get() methods
and we should only skip the one that matches.
llvm-svn: 261102
Summary:
The test code will trigger following an assert failure:
assert.h assertion failed at LoopConvertUtils.cpp:560 in
bool clang::tidy::modernize::ForLoopIndexUseVisitor::TraverseMemberExpr(clang::MemberExpr*): ExprType->isPointerType() && "Operator-> returned non-pointer type"
Reviewers: alexfh
Differential Revision: http://reviews.llvm.org/D17287
llvm-svn: 260953
Summary:
This patch is a continuation of http://reviews.llvm.org/D10553 by Jonathan B Coe.
The main additions are:
1. For C++11 the check suggests in-class field initialization as fix. This
makes the fields future proof towards the addition of new constructors.
2 For older language versions the fields are added in the right position
in the initializer list with more tests.
3. User documentation.
Reviewers: alexfh, jbcoe
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D16517
llvm-svn: 260873
Summary:
Fix oversight not checking the value of the Optional<bool> returned by
isExpensiveToCopy().
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D17064
llvm-svn: 260870
Summary:
Add check performance-faster-string-find.
It replaces single character string literals to character literals in calls to string::find and friends.
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D16152
llvm-svn: 260712
Expand the simplify boolean expression check to handle implicit conversion of integral types to bool and improve the handling of implicit conversion of member pointers to bool.
Implicit conversion of member pointers are replaced with explicit comparisons to nullptr.
Implicit conversions of integral types are replaced with explicit comparisons to 0.
Patch by Richard Thomson.
llvm-svn: 260681
I added portability warnings when int results are casted to long. I forgot to handle uint, ulong and ulonglong.
Tested on x86 and powerpc targets, hope it works now on all buildbots.
llvm-svn: 260667
Summary:
The check will trigger a assert failure("CondEndLoc.isValid") when
checking the IfStmt whose condition expression is not parsed.
In this case, we should ignore that.
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D17069
llvm-svn: 260505
Implicit conversion of member pointers are replaced with explicit comparisons to nullptr.
Implicit conversions of integral types are replaced with explicit comparisons to 0.
Patch by Richard Thomson.
llvm-svn: 260096
Summary: This is originally implemented by Jacques Pienaar.
Reviewers: alexfh
Subscribers: cfe-commits, jpienaar
Differential Revision: http://reviews.llvm.org/D16764
llvm-svn: 260084
Alexander Kornienko