Looks at conditionals and finds and replaces cases of cast<>, which will / assert rather than return a null pointer, and dyn_cast<> where / the return value is not captured. More...

#include <PreferIsaOrDynCastInConditionalsCheck.h>

Inheritance diagram for clang::tidy::llvm_check::PreferIsaOrDynCastInConditionalsCheck:

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Public Member Functions
	PreferIsaOrDynCastInConditionalsCheck (StringRef Name, ClangTidyContext *Context)
bool	isLanguageVersionSupported (const LangOptions &LangOpts) const override
void	registerMatchers (ast_matchers::MatchFinder *Finder) override
void	check (const ast_matchers::MatchFinder::MatchResult &Result) override

Detailed Description

Looks at conditionals and finds and replaces cases of cast<>, which will / assert rather than return a null pointer, and dyn_cast<> where / the return value is not captured.

Additionally, finds and replaces cases / that match the pattern var && isa<X>(var), where var is evaluated twice.

Finds cases like these:

if (auto x = cast<X>(y)) {}
// is replaced by:
if (auto x = dyn_cast<X>(y)) {}
 
if (cast<X>(y)) {}
// is replaced by:
if (isa<X>(y)) {}
 
if (dyn_cast<X>(y)) {}
// is replaced by:
if (isa<X>(y)) {}
 
if (var && isa<T>(var)) {}
// is replaced by:
if (isa_and_nonnull<T>(var.foo())) {}

// Other cases are ignored, e.g.:

if (auto f = cast<Z>(y)->foo()) {}
if (cast<Z>(y)->foo()) {}
if (X.cast(y)) {}

For the user-facing documentation see: https://clang.llvm.org/extra/clang-tidy/checks/llvm/prefer-isa-or-dyn-cast-in-conditionals.html

Definition at line 50 of file PreferIsaOrDynCastInConditionalsCheck.h.

Constructor & Destructor Documentation

◆ PreferIsaOrDynCastInConditionalsCheck()

clang::tidy::llvm_check::PreferIsaOrDynCastInConditionalsCheck::PreferIsaOrDynCastInConditionalsCheck	(	StringRef	Name,
		ClangTidyContext *	Context )

inline

Definition at line 52 of file PreferIsaOrDynCastInConditionalsCheck.h.

Member Function Documentation

◆ check()

void clang::tidy::llvm_check::PreferIsaOrDynCastInConditionalsCheck::check ( const ast_matchers::MatchFinder::MatchResult & Result )

override

Definition at line 61 of file PreferIsaOrDynCastInConditionalsCheck.cpp.

◆ isLanguageVersionSupported()

bool clang::tidy::llvm_check::PreferIsaOrDynCastInConditionalsCheck::isLanguageVersionSupported ( const LangOptions & LangOpts ) const

inlineoverride

Definition at line 55 of file PreferIsaOrDynCastInConditionalsCheck.h.

◆ registerMatchers()

void clang::tidy::llvm_check::PreferIsaOrDynCastInConditionalsCheck::registerMatchers ( ast_matchers::MatchFinder * Finder )