1//===--- UseUncaughtExceptionsCheck.cpp - clang-tidy--------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "UseUncaughtExceptionsCheck.h"
10#include "clang/AST/ASTContext.h"
11#include "clang/ASTMatchers/ASTMatchFinder.h"
12#include "clang/Lex/Lexer.h"
13
14using namespace clang::ast_matchers;
15
16namespace clang::tidy::modernize {
17
18void UseUncaughtExceptionsCheck::registerMatchers(MatchFinder *Finder) {
19 std::string MatchText = "::std::uncaught_exception";
20
21 // Using declaration: warning and fix-it.
22 Finder->addMatcher(
23 NodeMatch: usingDecl(hasAnyUsingShadowDecl(InnerMatcher: hasTargetDecl(InnerMatcher: hasName(Name: MatchText))))
24 .bind(ID: "using_decl"),
25 Action: this);
26
27 // DeclRefExpr: warning, no fix-it.
28 Finder->addMatcher(
29 NodeMatch: declRefExpr(to(InnerMatcher: functionDecl(hasName(Name: MatchText))), unless(callExpr()))
30 .bind(ID: "decl_ref_expr"),
31 Action: this);
32
33 auto DirectCallToUncaughtException = callee(InnerMatcher: expr(ignoringImpCasts(
34 InnerMatcher: declRefExpr(hasDeclaration(InnerMatcher: functionDecl(hasName(Name: MatchText)))))));
35
36 // CallExpr: warning, fix-it.
37 Finder->addMatcher(NodeMatch: callExpr(DirectCallToUncaughtException,
38 unless(hasAncestor(initListExpr())))
39 .bind(ID: "call_expr"),
40 Action: this);
41 // CallExpr in initialisation list: warning, fix-it with avoiding narrowing
42 // conversions.
43 Finder->addMatcher(NodeMatch: callExpr(DirectCallToUncaughtException,
44 hasAncestor(initListExpr()))
45 .bind(ID: "init_call_expr"),
46 Action: this);
47}
48
49void UseUncaughtExceptionsCheck::check(const MatchFinder::MatchResult &Result) {
50 SourceLocation BeginLoc;
51 SourceLocation EndLoc;
52 const auto *C = Result.Nodes.getNodeAs<CallExpr>(ID: "init_call_expr");
53 bool WarnOnly = false;
54
55 if (C) {
56 BeginLoc = C->getBeginLoc();
57 EndLoc = C->getEndLoc();
58 } else if (const auto *E = Result.Nodes.getNodeAs<CallExpr>(ID: "call_expr")) {
59 BeginLoc = E->getBeginLoc();
60 EndLoc = E->getEndLoc();
61 } else if (const auto *D =
62 Result.Nodes.getNodeAs<DeclRefExpr>(ID: "decl_ref_expr")) {
63 BeginLoc = D->getBeginLoc();
64 EndLoc = D->getEndLoc();
65 WarnOnly = true;
66 } else {
67 const auto *U = Result.Nodes.getNodeAs<UsingDecl>(ID: "using_decl");
68 assert(U && "Null pointer, no node provided");
69 BeginLoc = U->getNameInfo().getBeginLoc();
70 EndLoc = U->getNameInfo().getEndLoc();
71 }
72
73 auto Diag = diag(Loc: BeginLoc, Description: "'std::uncaught_exception' is deprecated, use "
74 "'std::uncaught_exceptions' instead");
75
76 if (!BeginLoc.isMacroID()) {
77 StringRef Text =
78 Lexer::getSourceText(Range: CharSourceRange::getTokenRange(B: BeginLoc, E: EndLoc),
79 SM: *Result.SourceManager, LangOpts: getLangOpts());
80
81 Text.consume_back(Suffix: "()");
82 int TextLength = Text.size();
83
84 if (WarnOnly) {
85 return;
86 }
87
88 if (!C) {
89 Diag << FixItHint::CreateInsertion(InsertionLoc: BeginLoc.getLocWithOffset(Offset: TextLength),
90 Code: "s");
91 } else {
92 Diag << FixItHint::CreateReplacement(C->getSourceRange(),
93 "std::uncaught_exceptions() > 0");
94 }
95 }
96}
97
98} // namespace clang::tidy::modernize
99

source code of clang-tools-extra/clang-tidy/modernize/UseUncaughtExceptionsCheck.cpp