LegalizeAdulthood updated this revision to Diff 396683.
LegalizeAdulthood marked an inline comment as not done.
LegalizeAdulthood added a comment.
Improve name of predicate function.
Use standard algorithms instead of raw loops
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D116386/new/
https://reviews.llvm.org/D116386
Files:
clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines-macro-usage.cpp
Index: clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines-macro-usage.cpp
===================================================================
--- clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines-macro-usage.cpp
+++ clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines-macro-usage.cpp
@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s cppcoreguidelines-macro-usage %t -- -header-filter=.* -system-headers --
+// RUN: %check_clang_tidy %s cppcoreguidelines-macro-usage -std=c++17-or-later %t -- -header-filter=.* -system-headers --
#ifndef INCLUDE_GUARD
#define INCLUDE_GUARD
@@ -6,6 +6,21 @@
#define PROBLEMATIC_CONSTANT 0
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: macro 'PROBLEMATIC_CONSTANT' used to declare a constant; consider using a 'constexpr' constant
+#define PROBLEMATIC_CONSTANT_CHAR '0'
+// CHECK-MESSAGES: [[@LINE-1]]:9: warning: macro 'PROBLEMATIC_CONSTANT_CHAR' used to declare a constant; consider using a 'constexpr' constant
+
+#define PROBLEMATIC_CONSTANT_WIDE_CHAR L'0'
+// CHECK-MESSAGES: [[@LINE-1]]:9: warning: macro 'PROBLEMATIC_CONSTANT_WIDE_CHAR' used to declare a constant; consider using a 'constexpr' constant
+
+#define PROBLEMATIC_CONSTANT_UTF8_CHAR u8'0'
+// CHECK-MESSAGES: [[@LINE-1]]:9: warning: macro 'PROBLEMATIC_CONSTANT_UTF8_CHAR' used to declare a constant; consider using a 'constexpr' constant
+
+#define PROBLEMATIC_CONSTANT_UTF16_CHAR u'0'
+// CHECK-MESSAGES: [[@LINE-1]]:9: warning: macro 'PROBLEMATIC_CONSTANT_UTF16_CHAR' used to declare a constant; consider using a 'constexpr' constant
+
+#define PROBLEMATIC_CONSTANT_UTF32_CHAR U'0'
+// CHECK-MESSAGES: [[@LINE-1]]:9: warning: macro 'PROBLEMATIC_CONSTANT_UTF32_CHAR' used to declare a constant; consider using a 'constexpr' constant
+
#define PROBLEMATIC_FUNCTION(x, y) ((a) > (b) ? (a) : (b))
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: function-like macro 'PROBLEMATIC_FUNCTION' used; consider a 'constexpr' template function
@@ -15,4 +30,17 @@
#define PROBLEMATIC_VARIADIC2(x, ...) (__VA_ARGS__)
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: variadic macro 'PROBLEMATIC_VARIADIC2' used; consider using a 'constexpr' variadic template function
+// These are all examples of common macros that shouldn't have constexpr suggestions.
+#define COMMA ,
+
+#define NORETURN [[noreturn]]
+
+#define DEPRECATED attribute((deprecated))
+
+#if LIB_EXPORTS
+#define DLLEXPORTS __declspec(dllexport)
+#else
+#define DLLEXPORTS __declspec(dllimport)
+#endif
+
#endif
Index: clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
+++ clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
@@ -78,22 +78,53 @@
this, SM, AllowedRegexp, CheckCapsOnly, IgnoreCommandLineMacros));
}
+namespace {
+
+bool isConstantTokenSequence(const MacroInfo *Info) {
+ auto IsConstantToken = [](const Token &Token) {
+ switch (Token.getKind()) {
+ case tok::comment:
+ case tok::numeric_constant:
+ case tok::char_constant:
+ case tok::wide_char_constant:
+ case tok::utf8_char_constant:
+ case tok::utf16_char_constant:
+ case tok::utf32_char_constant:
+ case tok::string_literal:
+ case tok::wide_string_literal:
+ case tok::header_name:
+ case tok::utf8_string_literal:
+ case tok::utf16_string_literal:
+ case tok::utf32_string_literal:
+ return true;
+ default:
+ return false;
+ }
+ };
+ return std::all_of(Info->tokens_begin(), Info->tokens_end(), IsConstantToken);
+}
+
+} // namespace
+
void MacroUsageCheck::warnMacro(const MacroDirective *MD, StringRef MacroName) {
- StringRef Message =
- "macro '%0' used to declare a constant; consider using a 'constexpr' "
- "constant";
+ const MacroInfo *Info = MD->getMacroInfo();
+ StringRef Message;
+ if (isConstantTokenSequence(Info))
+ Message = "macro '%0' used to declare a constant; consider using a "
+ "'constexpr' constant";
/// A variadic macro is function-like at the same time. Therefore variadic
/// macros are checked first and will be excluded for the function-like
/// diagnostic.
- if (MD->getMacroInfo()->isVariadic())
+ else if (Info->isVariadic())
Message = "variadic macro '%0' used; consider using a 'constexpr' "
"variadic template function";
- else if (MD->getMacroInfo()->isFunctionLike())
+ else if (Info->isFunctionLike())
Message = "function-like macro '%0' used; consider a 'constexpr' template "
"function";
- diag(MD->getLocation(), Message) << MacroName;
+ if (!Message.empty())
+ diag(MD->getLocation(), Message) << MacroName;
}
void MacroUsageCheck::warnNaming(const MacroDirective *MD,
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