clang-tools  6.0.0
ExceptionBaseclassCheck.cpp
Go to the documentation of this file.
1 //===--- ExceptionBaseclassCheck.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 
11 #include "clang/AST/ASTContext.h"
12 #include "clang/ASTMatchers/ASTMatchFinder.h"
13 
14 using namespace clang::ast_matchers;
15 
16 namespace clang {
17 namespace tidy {
18 namespace hicpp {
19 
20 void ExceptionBaseclassCheck::registerMatchers(MatchFinder *Finder) {
21  if (!getLangOpts().CPlusPlus)
22  return;
23 
24  Finder->addMatcher(
25  cxxThrowExpr(allOf(has(expr(unless(hasType(qualType(hasCanonicalType(
26  hasDeclaration(cxxRecordDecl(isSameOrDerivedFrom(
27  hasName("std::exception")))))))))),
28  has(expr(unless(cxxUnresolvedConstructExpr()))),
29  eachOf(has(expr(hasType(namedDecl().bind("decl")))),
30  anything())))
31  .bind("bad_throw"),
32  this);
33 }
34 
35 void ExceptionBaseclassCheck::check(const MatchFinder::MatchResult &Result) {
36  const auto *BadThrow = Result.Nodes.getNodeAs<CXXThrowExpr>("bad_throw");
37 
38  diag(BadThrow->getSubExpr()->getLocStart(), "throwing an exception whose "
39  "type %0 is not derived from "
40  "'std::exception'")
41  << BadThrow->getSubExpr()->getType() << BadThrow->getSourceRange();
42 
43  const auto *TypeDecl = Result.Nodes.getNodeAs<NamedDecl>("decl");
44  if (TypeDecl != nullptr)
45  diag(TypeDecl->getLocStart(), "type defined here", DiagnosticIDs::Note);
46 }
47 
48 } // namespace hicpp
49 } // namespace tidy
50 } // namespace clang