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llvm.src
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clang-tidy
misc
IncorrectRoundings.h
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//===--- IncorrectRoundings.h - clang-tidy ----------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_INCORRECTROUNDINGS_H_
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#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_INCORRECTROUNDINGS_H_
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#include "../ClangTidy.h"
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namespace
clang {
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namespace
tidy {
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namespace
misc {
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/// \brief Checks the usage of patterns known to produce incorrect rounding.
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/// Programmers often use
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/// (int)(double_expression + 0.5)
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/// to round the double expression to an integer. The problem with this
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/// 1. It is unnecessarily slow.
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/// 2. It is incorrect. The number 0.499999975 (smallest representable float
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/// number below 0.5) rounds to 1.0. Even worse behavior for negative
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/// numbers where both -0.5f and -1.4f both round to 0.0.
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class
IncorrectRoundings
:
public
ClangTidyCheck
{
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public
:
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IncorrectRoundings
(StringRef
Name
,
ClangTidyContext
*Context)
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:
ClangTidyCheck
(Name, Context) {}
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void
registerMatchers
(ast_matchers::MatchFinder *
Finder
)
override
;
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void
check
(
const
ast_matchers::MatchFinder::MatchResult &Result)
override
;
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};
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}
// namespace misc
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}
// namespace tidy
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}
// namespace clang
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#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_INCORRECTROUNDINGS_H_
Name
StringHandle Name
Definition:
PreprocessorTracker.cpp:525
Finder
std::unique_ptr< ast_matchers::MatchFinder > Finder
Definition:
ClangTidy.cpp:275
clang::tidy::misc::IncorrectRoundings::IncorrectRoundings
IncorrectRoundings(StringRef Name, ClangTidyContext *Context)
Definition:
IncorrectRoundings.h:29
clang::tidy::ClangTidyCheck
Base class for all clang-tidy checks.
Definition:
ClangTidy.h:127
clang::tidy::misc::IncorrectRoundings
Checks the usage of patterns known to produce incorrect rounding.
Definition:
IncorrectRoundings.h:27
clang::tidy::misc::IncorrectRoundings::check
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
Definition:
IncorrectRoundings.cpp:62
clang::tidy::ClangTidyContext
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
Definition:
ClangTidyDiagnosticConsumer.h:104
clang::tidy::misc::IncorrectRoundings::registerMatchers
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
Definition:
IncorrectRoundings.cpp:34
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