Finds uses of #pragma once and suggests replacing them with standard include guards (#ifndef/#define/#endif) for improved portability. More...

#include <AvoidPragmaOnceCheck.h>

Inheritance diagram for clang::tidy::portability::AvoidPragmaOnceCheck:

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Public Member Functions
	AvoidPragmaOnceCheck (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.

void	registerPPCallbacks (const SourceManager &SM, Preprocessor PP, Preprocessor ModuleExpanderPP) override
	Override this to register `PPCallbacks` in the preprocessor.

Public Member Functions inherited from clang::tidy::ClangTidyCheck
	ClangTidyCheck (StringRef CheckName, ClangTidyContext *Context)
	Initializes the check with `CheckName` and `Context`.

virtual bool	isLanguageVersionSupported (const LangOptions &LangOpts) const
	Override this to disable registering matchers and PP callbacks if an invalid language version is being used.

virtual void	registerPPCallbacks (const SourceManager &SM, Preprocessor PP, Preprocessor ModuleExpanderPP)
	Override this to register `PPCallbacks` in the preprocessor.

virtual void	registerMatchers (ast_matchers::MatchFinder *Finder)
	Override this to register AST matchers with `Finder`.

virtual void	check (const ast_matchers::MatchFinder::MatchResult &Result)
	`ClangTidyChecks` that register ASTMatchers should do the actual work in here.

DiagnosticBuilder	diag (SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
	Add a diagnostic with the check's name.

DiagnosticBuilder	diag (StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
	Add a diagnostic with the check's name.

DiagnosticBuilder	configurationDiag (StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning) const
	Adds a diagnostic to report errors in the check's configuration.

virtual void	storeOptions (ClangTidyOptions::OptionMap &Options)
	Should store all options supported by this check with their current values or default values for options that haven't been overridden.

Additional Inherited Members
Protected Member Functions inherited from clang::tidy::ClangTidyCheck
StringRef	getCurrentMainFile () const
	Returns the main file name of the current translation unit.

const LangOptions &	getLangOpts () const
	Returns the language options from the context.

bool	areDiagsSelfContained () const
	Returns true when the check is run in a use case when only 1 fix will be applied at a time.

StringRef	getID () const override

Protected Attributes inherited from clang::tidy::ClangTidyCheck
OptionsView	Options

Detailed Description

Finds uses of #pragma once and suggests replacing them with standard include guards (#ifndef/#define/#endif) for improved portability.

For the user-facing documentation see: http://clang.llvm.org/extra/clang-tidy/checks/portability/avoid-pragma-once.html

Definition at line 22 of file AvoidPragmaOnceCheck.h.

Constructor & Destructor Documentation

◆ AvoidPragmaOnceCheck()

clang::tidy::portability::AvoidPragmaOnceCheck::AvoidPragmaOnceCheck	(	StringRef	Name,
		ClangTidyContext *	Context
	)

inline

Definition at line 24 of file AvoidPragmaOnceCheck.h.

Member Function Documentation

◆ isLanguageVersionSupported()

bool clang::tidy::portability::AvoidPragmaOnceCheck::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 26 of file AvoidPragmaOnceCheck.h.

◆ registerPPCallbacks()

void clang::tidy::portability::AvoidPragmaOnceCheck::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 41 of file AvoidPragmaOnceCheck.cpp.

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