clang-tools  14.0.0git
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clang::tidy::cppcoreguidelines::MacroUsageCheck Class Reference

Find macro usage that is considered problematic because better language constructs exist for the task. More...

#include <MacroUsageCheck.h>

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Public Member Functions

 MacroUsageCheck (StringRef Name, ClangTidyContext *Context)
 
bool isLanguageVersionSupported (const LangOptions &LangOpts) const override
 Override this to disable registering matchers and PP callbacks if an invalid language version is being used. More...
 
void storeOptions (ClangTidyOptions::OptionMap &Opts) override
 Should store all options supported by this check with their current values or default values for options that haven't been overridden. More...
 
void registerPPCallbacks (const SourceManager &SM, Preprocessor *PP, Preprocessor *ModuleExpanderPP) override
 Override this to register PPCallbacks in the preprocessor. More...
 
void warnMacro (const MacroDirective *MD, StringRef MacroName)
 
void warnNaming (const MacroDirective *MD, StringRef MacroName)
 
- Public Member Functions inherited from clang::tidy::ClangTidyCheck
 ClangTidyCheck (StringRef CheckName, ClangTidyContext *Context)
 Initializes the check with CheckName and Context. More...
 
virtual void registerMatchers (ast_matchers::MatchFinder *Finder)
 Override this to register AST matchers with Finder. More...
 
virtual void check (const ast_matchers::MatchFinder::MatchResult &Result)
 ClangTidyChecks that register ASTMatchers should do the actual work in here. More...
 
DiagnosticBuilder diag (SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
 Add a diagnostic with the check's name. More...
 
DiagnosticBuilder diag (StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
 Add a diagnostic with the check's name. More...
 
DiagnosticBuilder configurationDiag (StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning) const
 Adds a diagnostic to report errors in the check's configuration. More...
 

Additional Inherited Members

- Protected Member Functions inherited from clang::tidy::ClangTidyCheck
StringRef getCurrentMainFile () const
 Returns the main file name of the current translation unit. More...
 
const LangOptions & getLangOpts () const
 Returns the language options from the context. More...
 
- Protected Attributes inherited from clang::tidy::ClangTidyCheck
OptionsView Options
 

Detailed Description

Find macro usage that is considered problematic because better language constructs exist for the task.

For the user-facing documentation see: http://clang.llvm.org/extra/clang-tidy/checks/cppcoreguidelines-macro-usage.html

Definition at line 26 of file MacroUsageCheck.h.

Constructor & Destructor Documentation

◆ MacroUsageCheck()

clang::tidy::cppcoreguidelines::MacroUsageCheck::MacroUsageCheck ( StringRef  Name,
ClangTidyContext Context 
)
inline

Definition at line 28 of file MacroUsageCheck.h.

Member Function Documentation

◆ isLanguageVersionSupported()

bool clang::tidy::cppcoreguidelines::MacroUsageCheck::isLanguageVersionSupported ( const LangOptions &  LangOpts) const
inlineoverridevirtual

Override this to disable registering matchers and PP callbacks if an invalid language version is being used.

For example if a check is examining overloaded functions then this should be overridden to return false when the CPlusPlus flag is not set in LangOpts.

Reimplemented from clang::tidy::ClangTidyCheck.

Definition at line 33 of file MacroUsageCheck.h.

◆ registerPPCallbacks()

void clang::tidy::cppcoreguidelines::MacroUsageCheck::registerPPCallbacks ( const SourceManager &  SM,
Preprocessor *  PP,
Preprocessor *  ModuleExpanderPP 
)
overridevirtual

Override this to register PPCallbacks in the preprocessor.

This should be used for clang-tidy checks that analyze preprocessor- dependent properties, e.g. include directives and macro definitions.

This will only be executed if the function isLanguageVersionSupported returns true.

There are two Preprocessors to choose from that differ in how they handle modular #includes:

  • PP is the real Preprocessor. It doesn't walk into modular #includes and thus doesn't generate PPCallbacks for their contents.
  • ModuleExpanderPP preprocesses the whole translation unit in the non-modular mode, which allows it to generate PPCallbacks not only for the main file and textual headers, but also for all transitively included modular headers when the analysis runs with modules enabled. When modules are not enabled ModuleExpanderPP just points to the real preprocessor.

Reimplemented from clang::tidy::ClangTidyCheck.

Definition at line 74 of file MacroUsageCheck.cpp.

References clang::tidy::bugprone::PP, and SM.

◆ storeOptions()

void clang::tidy::cppcoreguidelines::MacroUsageCheck::storeOptions ( ClangTidyOptions::OptionMap Options)
overridevirtual

Should store all options supported by this check with their current values or default values for options that haven't been overridden.

The check should use Options.store() to store each option it supports whether it has the default value or it has been overridden.

Reimplemented from clang::tidy::ClangTidyCheck.

Definition at line 68 of file MacroUsageCheck.cpp.

◆ warnMacro()

void clang::tidy::cppcoreguidelines::MacroUsageCheck::warnMacro ( const MacroDirective *  MD,
StringRef  MacroName 
)

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.

Definition at line 81 of file MacroUsageCheck.cpp.

◆ warnNaming()

void clang::tidy::cppcoreguidelines::MacroUsageCheck::warnNaming ( const MacroDirective *  MD,
StringRef  MacroName 
)

Definition at line 99 of file MacroUsageCheck.cpp.


The documentation for this class was generated from the following files: