This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rGe4f9b5d442a2: [clang-tidy] Include std::basic_string_view in
readability-redundant-string… (authored by ckennelly).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D91009/new/
https://reviews.llvm.org/D91009
Files:
clang-tools-extra/clang-tidy/readability/RedundantStringInitCheck.cpp
clang-tools-extra/docs/ReleaseNotes.rst
clang-tools-extra/docs/clang-tidy/checks/readability-redundant-string-init.rst
clang-tools-extra/test/clang-tidy/checkers/readability-redundant-string-init.cpp
Index: clang-tools-extra/test/clang-tidy/checkers/readability-redundant-string-init.cpp
===================================================================
--- clang-tools-extra/test/clang-tidy/checkers/readability-redundant-string-init.cpp
+++ clang-tools-extra/test/clang-tidy/checkers/readability-redundant-string-init.cpp
@@ -1,7 +1,7 @@
// RUN: %check_clang_tidy -std=c++11,c++14 %s readability-redundant-string-init %t \
// RUN: -config="{CheckOptions: \
// RUN: [{key: readability-redundant-string-init.StringNames, \
-// RUN: value: '::std::basic_string;our::TestString'}] \
+// RUN: value: '::std::basic_string;::std::basic_string_view;our::TestString'}] \
// RUN: }"
// FIXME: Fix the checker to work in C++17 mode.
@@ -19,6 +19,20 @@
};
typedef basic_string<char> string;
typedef basic_string<wchar_t> wstring;
+
+template <typename C, typename T = std::char_traits<C>, typename A = std::allocator<C>>
+struct basic_string_view {
+ using size_type = decltype(sizeof(0));
+
+ basic_string_view();
+ basic_string_view(const basic_string_view &);
+ basic_string_view(const C *, size_type);
+ basic_string_view(const C *);
+ template <class It, class End>
+ basic_string_view(It, End);
+};
+typedef basic_string_view<char> string_view;
+typedef basic_string_view<wchar_t> wstring_view;
}
void f() {
@@ -48,6 +62,33 @@
std::string z;
}
+void fview() {
+ std::string_view a = "";
+ // CHECK-MESSAGES: [[@LINE-1]]:20: warning: redundant string initialization [readability-redundant-string-init]
+ // CHECK-FIXES: std::string_view a;
+ std::string_view b("");
+ // CHECK-MESSAGES: [[@LINE-1]]:20: warning: redundant string initialization
+ // CHECK-FIXES: std::string_view b;
+ std::string_view c = R"()";
+ // CHECK-MESSAGES: [[@LINE-1]]:20: warning: redundant string initialization
+ // CHECK-FIXES: std::string_view c;
+ std::string_view d(R"()");
+ // CHECK-MESSAGES: [[@LINE-1]]:20: warning: redundant string initialization
+ // CHECK-FIXES: std::string_view d;
+ std::string_view e{""};
+ // CHECK-MESSAGES: [[@LINE-1]]:20: warning: redundant string initialization
+ // CHECK-FIXES: std::string_view e;
+ std::string_view f = {""};
+ // CHECK-MESSAGES: [[@LINE-1]]:20: warning: redundant string initialization
+ // CHECK-FIXES: std::string_view f;
+
+ std::string_view u = "u";
+ std::string_view w("w");
+ std::string_view x = R"(x)";
+ std::string_view y(R"(y)");
+ std::string_view z;
+}
+
void g() {
std::wstring a = L"";
// CHECK-MESSAGES: [[@LINE-1]]:16: warning: redundant string initialization
@@ -69,6 +110,33 @@
std::wstring z;
}
+void gview() {
+ std::wstring_view a = L"";
+ // CHECK-MESSAGES: [[@LINE-1]]:21: warning: redundant string initialization [readability-redundant-string-init]
+ // CHECK-FIXES: std::wstring_view a;
+ std::wstring_view b(L"");
+ // CHECK-MESSAGES: [[@LINE-1]]:21: warning: redundant string initialization
+ // CHECK-FIXES: std::wstring_view b;
+ std::wstring_view c = L"";
+ // CHECK-MESSAGES: [[@LINE-1]]:21: warning: redundant string initialization
+ // CHECK-FIXES: std::wstring_view c;
+ std::wstring_view d(L"");
+ // CHECK-MESSAGES: [[@LINE-1]]:21: warning: redundant string initialization
+ // CHECK-FIXES: std::wstring_view d;
+ std::wstring_view e{L""};
+ // CHECK-MESSAGES: [[@LINE-1]]:21: warning: redundant string initialization
+ // CHECK-FIXES: std::wstring_view e;
+ std::wstring_view f = {L""};
+ // CHECK-MESSAGES: [[@LINE-1]]:21: warning: redundant string initialization
+ // CHECK-FIXES: std::wstring_view f;
+
+ std::wstring_view u = L"u";
+ std::wstring_view w(L"w");
+ std::wstring_view x = LR"(x)";
+ std::wstring_view y(LR"(y)");
+ std::wstring_view z;
+}
+
template <typename T>
void templ() {
std::string s = "";
@@ -274,7 +342,6 @@
// CHECK-MESSAGES: [[@LINE-2]]:23: warning: redundant string initialization
// CHECK-FIXES: Foo(float) {}
-
// Check how it handles removing some redundant initializers while leaving
// valid initializers intact.
Foo(std::string Arg) : A(Arg), B(""), C("NonEmpty"), D(R"()"), E("") {}
Index: clang-tools-extra/docs/clang-tidy/checks/readability-redundant-string-init.rst
===================================================================
--- clang-tools-extra/docs/clang-tidy/checks/readability-redundant-string-init.rst
+++ clang-tools-extra/docs/clang-tidy/checks/readability-redundant-string-init.rst
@@ -19,12 +19,21 @@
std::string a;
std::string b;
+ // Initializing a string_view with an empty string literal produces an
+ // instance that compares equal to string_view().
+ std::string_view a = "";
+ std::string_view b("");
+
+ // becomes
+ std::string_view a;
+ std::string_view b;
+
Options
-------
.. option:: StringNames
- Default is `::std::basic_string`.
+ Default is `::std::basic_string;::std::basic_string_view`.
Semicolon-delimited list of class names to apply this check to.
By default `::std::basic_string` applies to ``std::string`` and
Index: clang-tools-extra/docs/ReleaseNotes.rst
===================================================================
--- clang-tools-extra/docs/ReleaseNotes.rst
+++ clang-tools-extra/docs/ReleaseNotes.rst
@@ -152,6 +152,11 @@
- Removed `google-runtime-references` check because the rule it checks does
not exist in the Google Style Guide anymore.
+- Improved :doc:`readability-redundant-string-init
+ <clang-tidy/checks/readability-redundant-string-init>` check.
+
+ Added `std::basic_string_view` to default list of ``string``-like types.
+
Improvements to include-fixer
-----------------------------
Index: clang-tools-extra/clang-tidy/readability/RedundantStringInitCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/readability/RedundantStringInitCheck.cpp
+++ clang-tools-extra/clang-tidy/readability/RedundantStringInitCheck.cpp
@@ -18,7 +18,8 @@
namespace tidy {
namespace readability {
-const char DefaultStringNames[] = "::std::basic_string";
+const char DefaultStringNames[] =
+ "::std::basic_string_view;::std::basic_string";
static ast_matchers::internal::Matcher<NamedDecl>
hasAnyNameStdString(std::vector<std::string> Names) {
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