clang-tools 8.0.0

AvoidCArraysCheck.cpp
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1 //===--- AvoidCArraysCheck.cpp - clang-tidy -------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "AvoidCArraysCheck.h"
11 #include "clang/AST/ASTContext.h"
12 #include "clang/ASTMatchers/ASTMatchFinder.h"
13
14 using namespace clang::ast_matchers;
15
16 namespace {
17
18 AST_MATCHER(clang::TypeLoc, hasValidBeginLoc) {
19 return Node.getBeginLoc().isValid();
20 }
21
22 AST_MATCHER_P(clang::TypeLoc, hasType,
23 clang::ast_matchers::internal::Matcher<clang::Type>,
24 InnerMatcher) {
25 const clang::Type *TypeNode = Node.getTypePtr();
26 return TypeNode != nullptr &&
27 InnerMatcher.matches(*TypeNode, Finder, Builder);
28 }
29
30 AST_MATCHER(clang::RecordDecl, isExternCContext) {
31 return Node.isExternCContext();
32 }
33
34 AST_MATCHER(clang::ParmVarDecl, isArgvOfMain) {
35 const clang::DeclContext *DC = Node.getDeclContext();
36 const auto *FD = llvm::dyn_cast<clang::FunctionDecl>(DC);
37 return FD ? FD->isMain() : false;
38 }
39
40 } // namespace
41
42 namespace clang {
43 namespace tidy {
44 namespace modernize {
45
46 void AvoidCArraysCheck::registerMatchers(MatchFinder *Finder) {
47 // std::array<> is avaliable since C++11.
48 if (!getLangOpts().CPlusPlus11)
49 return;
50
51 Finder->addMatcher(
52 typeLoc(hasValidBeginLoc(), hasType(arrayType()),
53 unless(anyOf(hasParent(parmVarDecl(isArgvOfMain())),
54 hasParent(varDecl(isExternC())),
55 hasParent(fieldDecl(
56 hasParent(recordDecl(isExternCContext())))),
57 hasAncestor(functionDecl(isExternC())))))
58 .bind("typeloc"),
59 this);
60 }
61
62 void AvoidCArraysCheck::check(const MatchFinder::MatchResult &Result) {
63 const auto *ArrayType = Result.Nodes.getNodeAs<TypeLoc>("typeloc");
64
65 static constexpr llvm::StringLiteral UseArray = llvm::StringLiteral(
66 "do not declare C-style arrays, use std::array<> instead");
67 static constexpr llvm::StringLiteral UseVector = llvm::StringLiteral(
68 "do not declare C VLA arrays, use std::vector<> instead");
69
70 diag(ArrayType->getBeginLoc(),
71 ArrayType->getTypePtr()->isVariableArrayType() ? UseVector : UseArray);
72 }
73
74 } // namespace modernize
75 } // namespace tidy
76 } // namespace clang
clang::ast_matchers
Definition: AbseilMatcher.h:15
clang::tidy::matchers::AST_MATCHER
AST_MATCHER(BinaryOperator, isAssignmentOperator)
Definition: Matchers.h:20
AvoidCArraysCheck.h
Result
llvm::Optional< llvm::Expected< tooling::AtomicChanges > > Result
Definition: ClangdServer.cpp:60
clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Definition: ChangeNamespace.cpp:18
clang::ast_matchers::AST_MATCHER_P
AST_MATCHER_P(FunctionDecl, throws, internal::Matcher< Type >, InnerMatcher)
Definition: ExceptionEscapeCheck.cpp:139