mgehre updated this revision to Diff 93056.
mgehre marked 2 inline comments as done.
mgehre added a comment.
Add suffix for floating point literals; clang-format
https://reviews.llvm.org/D24892
Files:
clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.h
docs/ReleaseNotes.rst
docs/clang-tidy/checks/cppcoreguidelines-pro-type-member-init.rst
test/clang-tidy/cppcoreguidelines-pro-type-member-init-literal-initializers.cpp
Index: test/clang-tidy/cppcoreguidelines-pro-type-member-init-literal-initializers.cpp
===================================================================
--- /dev/null
+++ test/clang-tidy/cppcoreguidelines-pro-type-member-init-literal-initializers.cpp
@@ -0,0 +1,24 @@
+// RUN: %check_clang_tidy %s cppcoreguidelines-pro-type-member-init %t -- -config="{CheckOptions: [{key: "cppcoreguidelines-pro-type-member-init.LiteralInitializers", value: 1}]}" -- -std=c++11
+
+struct T {
+ int i;
+};
+
+struct S {
+ bool b;
+ // CHECK-FIXES: bool b = false;
+ int i;
+ // CHECK-FIXES: int i = 0;
+ float f;
+ // CHECK-FIXES: float f = 0.0f;
+ double d;
+ // CHECK-FIXES: double d = 0.0;
+ long double l;
+ // CHECK-FIXES: double l = 0.0l;
+ int *ptr;
+ // CHECK-FIXES: int *ptr = nullptr;
+ T t;
+ // CHECK-FIXES: T t{};
+ S() {};
+ // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: constructor does not initialize these fields:
+};
Index: docs/clang-tidy/checks/cppcoreguidelines-pro-type-member-init.rst
===================================================================
--- docs/clang-tidy/checks/cppcoreguidelines-pro-type-member-init.rst
+++ docs/clang-tidy/checks/cppcoreguidelines-pro-type-member-init.rst
@@ -33,6 +33,10 @@
zero-initialized during construction. For performance critical code, it may
be important to not initialize fixed-size array members. Default is `0`.
+.. option:: LiteralInitializers
+ If set to non-zero, the check will provide fix-its with literal initializers
+ (``int i = 0;``) instead of curly braces (``int i{};``).
+
This rule is part of the "Type safety" profile of the C++ Core
Guidelines, corresponding to rule Type.6. See
https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#Pro-type-memberinit.
Index: docs/ReleaseNotes.rst
===================================================================
--- docs/ReleaseNotes.rst
+++ docs/ReleaseNotes.rst
@@ -67,6 +67,10 @@
Allow custom memory management functions to be considered as well.
+- Added `LiteralInitializers` option to `cppcoreguidelines-pro-type-member-init`
+ If set to true, the check will provide fix-its with literal initializers
+ (``int i = 0;``) instead of curly braces (``int i{};``).
+
- New `readability-misleading-indentation
<http://clang.llvm.org/extra/clang-tidy/checks/readability-misleading-indentation.html>`_ check
Index: clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.h
===================================================================
--- clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.h
+++ clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.h
@@ -65,6 +65,9 @@
// Whether arrays need to be initialized or not. Default is false.
bool IgnoreArrays;
+ // Whether fix-its for initializers of fundamental type use literals. Only
+ // effective in C++11 mode. Default is false.
+ bool LiteralInitializers;
};
} // namespace cppcoreguidelines
Index: clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
===================================================================
--- clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
+++ clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
@@ -255,7 +255,8 @@
ProTypeMemberInitCheck::ProTypeMemberInitCheck(StringRef Name,
ClangTidyContext *Context)
: ClangTidyCheck(Name, Context),
- IgnoreArrays(Options.get("IgnoreArrays", false)) {}
+ IgnoreArrays(Options.get("IgnoreArrays", false)),
+ LiteralInitializers(Options.get("LiteralInitializers", false)) {}
void ProTypeMemberInitCheck::registerMatchers(MatchFinder *Finder) {
if (!getLangOpts().CPlusPlus)
@@ -319,6 +320,7 @@
void ProTypeMemberInitCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
Options.store(Opts, "IgnoreArrays", IgnoreArrays);
+ Options.store(Opts, "LiteralInitializers", LiteralInitializers);
}
// FIXME: Copied from clang/lib/Sema/SemaDeclCXX.cpp.
@@ -343,6 +345,38 @@
return isIncompleteOrZeroLengthArrayType(Context, Type);
}
+static const char *getInitializer(QualType type, bool LiteralInitializers) {
+ const char *DefaultInitializer = "{}";
+ if (!LiteralInitializers)
+ return DefaultInitializer;
+
+ if (type->isPointerType())
+ return " = nullptr";
+
+ const BuiltinType *BT =
+ dyn_cast<BuiltinType>(type->getCanonicalTypeInternal());
+ if (!BT)
+ return DefaultInitializer;
+
+ switch (BT->getKind()) {
+ case BuiltinType::Bool:
+ return " = false";
+ case BuiltinType::Float:
+ return " = 0.0f";
+ case BuiltinType::Double:
+ return " = 0.0";
+ case BuiltinType::LongDouble:
+ return " = 0.0l";
+ default:
+ break;
+ }
+
+ if (type->isIntegerType())
+ return " = 0";
+
+ return DefaultInitializer;
+}
+
void ProTypeMemberInitCheck::checkMissingMemberInitializer(
ASTContext &Context, const CXXRecordDecl &ClassDecl,
const CXXConstructorDecl *Ctor) {
@@ -419,7 +453,7 @@
for (const FieldDecl *Field : FieldsToFix) {
Diag << FixItHint::CreateInsertion(
getLocationForEndOfToken(Context, Field->getSourceRange().getEnd()),
- "{}");
+ getInitializer(Field->getType(), LiteralInitializers));
}
} else if (Ctor) {
// Otherwise, rewrite the constructor's initializer list.
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