clang-tools  7.0.0svn
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clang::tidy::misc::MacroParenthesesCheck Class Reference

Finds macros that can have unexpected behaviour due to missing parentheses. More...

#include <MacroParenthesesCheck.h>

Inheritance diagram for clang::tidy::misc::MacroParenthesesCheck:
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Collaboration diagram for clang::tidy::misc::MacroParenthesesCheck:
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Public Member Functions

 MacroParenthesesCheck (StringRef Name, ClangTidyContext *Context)
void registerPPCallbacks (CompilerInstance &Compiler) override
 Override this to register PPCallbacks with Compiler. More...
- 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...
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. 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...
LangOptions getLangOpts () const
 Returns the language options from the context. More...
- Protected Attributes inherited from clang::tidy::ClangTidyCheck
OptionsView Options

Detailed Description

Finds macros that can have unexpected behaviour due to missing parentheses.

Macros are expanded by the preprocessor as-is. As a result, there can be unexpected behaviour; operators may be evaluated in unexpected order and unary operators may become binary operators, etc.

When the replacement list has an expression, it is recommended to surround it with parentheses. This ensures that the macro result is evaluated completely before it is used.

It is also recommended to surround macro arguments in the replacement list with parentheses. This ensures that the argument value is calculated properly.

Definition at line 32 of file MacroParenthesesCheck.h.

Constructor & Destructor Documentation

◆ MacroParenthesesCheck()

clang::tidy::misc::MacroParenthesesCheck::MacroParenthesesCheck ( StringRef  Name,
ClangTidyContext Context 

Definition at line 34 of file MacroParenthesesCheck.h.

References registerPPCallbacks().

Member Function Documentation

◆ registerPPCallbacks()

void clang::tidy::misc::MacroParenthesesCheck::registerPPCallbacks ( CompilerInstance &  Compiler)

Override this to register PPCallbacks with Compiler.

This should be used for clang-tidy checks that analyze preprocessor- dependent properties, e.g. the order of include directives.

Reimplemented from clang::tidy::ClangTidyCheck.

Definition at line 252 of file MacroParenthesesCheck.cpp.

Referenced by MacroParenthesesCheck().

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