clang-tools  10.0.0git
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clang::tidy::bugprone::SignedCharMisuseCheck Class Reference

Finds signed char -> integer conversions which might indicate a programming error. More...

#include <SignedCharMisuseCheck.h>

Inheritance diagram for clang::tidy::bugprone::SignedCharMisuseCheck:
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Collaboration diagram for clang::tidy::bugprone::SignedCharMisuseCheck:
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Public Member Functions

 SignedCharMisuseCheck (StringRef Name, ClangTidyContext *Context)
 
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 registerMatchers (ast_matchers::MatchFinder *Finder) override
 Override this to register AST matchers with Finder. More...
 
void check (const ast_matchers::MatchFinder::MatchResult &Result) override
 ClangTidyChecks that register ASTMatchers should do the actual work in here. More...
 
- Public Member Functions inherited from clang::tidy::ClangTidyCheck
 ClangTidyCheck (StringRef CheckName, ClangTidyContext *Context)
 Initializes the check with CheckName and Context. More...
 
virtual void registerPPCallbacks (const SourceManager &SM, Preprocessor *PP, Preprocessor *ModuleExpanderPP)
 Override this to register PPCallbacks in the preprocessor. More...
 
DiagnosticBuilder diag (SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
 Add a diagnostic with the check's name. 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

Finds signed char -> integer conversions which might indicate a programming error.

The basic problem with the signed char, that it might store the non-ASCII characters as negative values. The human programmer probably expects that after an integer conversion the converted value matches with the character code (a value from [0..255]), however, the actual value is in [-128..127] interval. This also applies to the plain char type on those implementations which represent char similar to signed char.

For the user-facing documentation see: http://clang.llvm.org/extra/clang-tidy/checks/bugprone-signed-char-misuse.html

Definition at line 28 of file SignedCharMisuseCheck.h.

Constructor & Destructor Documentation

◆ SignedCharMisuseCheck()

clang::tidy::bugprone::SignedCharMisuseCheck::SignedCharMisuseCheck ( StringRef  Name,
ClangTidyContext Context 
)

Definition at line 27 of file SignedCharMisuseCheck.cpp.

Member Function Documentation

◆ check()

void clang::tidy::bugprone::SignedCharMisuseCheck::check ( const ast_matchers::MatchFinder::MatchResult &  Result)
overridevirtual

ClangTidyChecks that register ASTMatchers should do the actual work in here.

Reimplemented from clang::tidy::ClangTidyCheck.

Definition at line 79 of file SignedCharMisuseCheck.cpp.

◆ registerMatchers()

void clang::tidy::bugprone::SignedCharMisuseCheck::registerMatchers ( ast_matchers::MatchFinder *  Finder)
overridevirtual

Override this to register AST matchers with Finder.

This should be used by clang-tidy checks that analyze code properties that dependent on AST knowledge.

You can register as many matchers as necessary with Finder. Usually, "this" will be used as callback, but you can also specify other callback classes. Thereby, different matchers can trigger different callbacks.

If you need to merge information between the different matchers, you can store these as members of the derived class. However, note that all matches occur in the order of the AST traversal.

Reimplemented from clang::tidy::ClangTidyCheck.

Definition at line 36 of file SignedCharMisuseCheck.cpp.

◆ storeOptions()

void clang::tidy::bugprone::SignedCharMisuseCheck::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 32 of file SignedCharMisuseCheck.cpp.


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