forked from OSchip/llvm-project
1464 lines
62 KiB
C++
1464 lines
62 KiB
C++
//===---------- ExprMutationAnalyzerTest.cpp ------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Analysis/Analyses/ExprMutationAnalyzer.h"
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#include "clang/AST/TypeLoc.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/ASTMatchers/ASTMatchers.h"
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#include "clang/Tooling/Tooling.h"
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#include "llvm/ADT/SmallString.h"
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include <cctype>
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namespace clang {
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using namespace clang::ast_matchers;
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using ::testing::ElementsAre;
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using ::testing::ResultOf;
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using ::testing::Values;
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namespace {
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using ExprMatcher = internal::Matcher<Expr>;
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using StmtMatcher = internal::Matcher<Stmt>;
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std::unique_ptr<ASTUnit>
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buildASTFromCodeWithArgs(const Twine &Code,
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const std::vector<std::string> &Args) {
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SmallString<1024> CodeStorage;
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auto AST =
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tooling::buildASTFromCodeWithArgs(Code.toStringRef(CodeStorage), Args);
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EXPECT_FALSE(AST->getDiagnostics().hasErrorOccurred());
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return AST;
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}
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std::unique_ptr<ASTUnit> buildASTFromCode(const Twine &Code) {
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return buildASTFromCodeWithArgs(Code, {});
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}
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ExprMatcher declRefTo(StringRef Name) {
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return declRefExpr(to(namedDecl(hasName(Name))));
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}
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StmtMatcher withEnclosingCompound(ExprMatcher Matcher) {
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return expr(Matcher, hasAncestor(compoundStmt().bind("stmt"))).bind("expr");
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}
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bool isMutated(const SmallVectorImpl<BoundNodes> &Results, ASTUnit *AST) {
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const auto *const S = selectFirst<Stmt>("stmt", Results);
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const auto *const E = selectFirst<Expr>("expr", Results);
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TraversalKindScope RAII(AST->getASTContext(), TK_AsIs);
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return ExprMutationAnalyzer(*S, AST->getASTContext()).isMutated(E);
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}
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SmallVector<std::string, 1>
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mutatedBy(const SmallVectorImpl<BoundNodes> &Results, ASTUnit *AST) {
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const auto *const S = selectFirst<Stmt>("stmt", Results);
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SmallVector<std::string, 1> Chain;
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ExprMutationAnalyzer Analyzer(*S, AST->getASTContext());
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for (const auto *E = selectFirst<Expr>("expr", Results); E != nullptr;) {
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const Stmt *By = Analyzer.findMutation(E);
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if (!By)
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break;
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std::string Buffer;
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llvm::raw_string_ostream Stream(Buffer);
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By->printPretty(Stream, nullptr, AST->getASTContext().getPrintingPolicy());
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Chain.emplace_back(StringRef(Stream.str()).trim().str());
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E = dyn_cast<DeclRefExpr>(By);
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}
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return Chain;
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}
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std::string removeSpace(std::string s) {
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s.erase(std::remove_if(s.begin(), s.end(),
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[](char c) { return llvm::isSpace(c); }),
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s.end());
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return s;
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}
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const std::string StdRemoveReference =
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"namespace std {"
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"template<class T> struct remove_reference { typedef T type; };"
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"template<class T> struct remove_reference<T&> { typedef T type; };"
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"template<class T> struct remove_reference<T&&> { typedef T type; }; }";
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const std::string StdMove =
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"namespace std {"
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"template<class T> typename remove_reference<T>::type&& "
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"move(T&& t) noexcept {"
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"return static_cast<typename remove_reference<T>::type&&>(t); } }";
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const std::string StdForward =
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"namespace std {"
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"template<class T> T&& "
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"forward(typename remove_reference<T>::type& t) noexcept { return t; }"
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"template<class T> T&& "
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"forward(typename remove_reference<T>::type&& t) noexcept { return t; } }";
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} // namespace
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TEST(ExprMutationAnalyzerTest, Trivial) {
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const auto AST = buildASTFromCode("void f() { int x; x; }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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}
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class AssignmentTest : public ::testing::TestWithParam<std::string> {};
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// This test is for the most basic and direct modification of a variable,
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// assignment to it (e.g. `x = 10;`).
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// It additionally tests that references to a variable are not only captured
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// directly but expressions that result in the variable are handled, too.
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// This includes the comma operator, parens and the ternary operator.
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TEST_P(AssignmentTest, AssignmentModifies) {
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// Test the detection of the raw expression modifications.
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{
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const std::string ModExpr = "x " + GetParam() + " 10";
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const auto AST = buildASTFromCode("void f() { int x; " + ModExpr + "; }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre(ModExpr));
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}
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// Test the detection if the expression is surrounded by parens.
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{
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const std::string ModExpr = "(x) " + GetParam() + " 10";
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const auto AST = buildASTFromCode("void f() { int x; " + ModExpr + "; }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre(ModExpr));
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}
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// Test the detection if the comma operator yields the expression as result.
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{
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const std::string ModExpr = "x " + GetParam() + " 10";
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const auto AST = buildASTFromCodeWithArgs(
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"void f() { int x, y; y, " + ModExpr + "; }", {"-Wno-unused-value"});
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre(ModExpr));
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}
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// Ensure no detection if the comma operator does not yield the expression as
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// result.
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{
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const std::string ModExpr = "y, x, y " + GetParam() + " 10";
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const auto AST = buildASTFromCodeWithArgs(
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"void f() { int x, y; " + ModExpr + "; }", {"-Wno-unused-value"});
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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}
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// Test the detection if the a ternary operator can result in the expression.
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{
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const std::string ModExpr = "(y != 0 ? y : x) " + GetParam() + " 10";
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const auto AST =
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buildASTFromCode("void f() { int y = 0, x; " + ModExpr + "; }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre(ModExpr));
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}
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// Test the detection if the a ternary operator can result in the expression
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// through multiple nesting of ternary operators.
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{
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const std::string ModExpr =
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"(y != 0 ? (y > 5 ? y : x) : (y)) " + GetParam() + " 10";
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const auto AST =
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buildASTFromCode("void f() { int y = 0, x; " + ModExpr + "; }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre(ModExpr));
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}
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// Test the detection if the a ternary operator can result in the expression
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// with additional parens.
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{
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const std::string ModExpr = "(y != 0 ? (y) : ((x))) " + GetParam() + " 10";
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const auto AST =
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buildASTFromCode("void f() { int y = 0, x; " + ModExpr + "; }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre(ModExpr));
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}
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// Test the detection for the binary conditional operator.
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{
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const std::string ModExpr = "(y ?: x) " + GetParam() + " 10";
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const auto AST =
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buildASTFromCode("void f() { int y = 0, x; " + ModExpr + "; }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre(ModExpr));
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}
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}
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INSTANTIATE_TEST_SUITE_P(AllAssignmentOperators, AssignmentTest,
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Values("=", "+=", "-=", "*=", "/=", "%=", "&=", "|=",
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"^=", "<<=", ">>=") );
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TEST(ExprMutationAnalyzerTest, AssignmentConditionalWithInheritance) {
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const auto AST = buildASTFromCode("struct Base {void nonconst(); };"
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"struct Derived : Base {};"
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"static void f() {"
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" Derived x, y;"
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" Base &b = true ? x : y;"
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" b.nonconst();"
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"}");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("b", "b.nonconst()"));
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}
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class IncDecTest : public ::testing::TestWithParam<std::string> {};
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TEST_P(IncDecTest, IncDecModifies) {
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const std::string ModExpr = GetParam();
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const auto AST = buildASTFromCode("void f() { int x; " + ModExpr + "; }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre(ModExpr));
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}
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INSTANTIATE_TEST_SUITE_P(AllIncDecOperators, IncDecTest,
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Values("++x", "--x", "x++", "x--", "++(x)", "--(x)",
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"(x)++", "(x)--") );
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// Section: member functions
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TEST(ExprMutationAnalyzerTest, NonConstMemberFunc) {
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const auto AST = buildASTFromCode(
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"void f() { struct Foo { void mf(); }; Foo x; x.mf(); }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.mf()"));
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}
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TEST(ExprMutationAnalyzerTest, AssumedNonConstMemberFunc) {
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auto AST = buildASTFromCodeWithArgs(
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"struct X { template <class T> void mf(); };"
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"template <class T> void f() { X x; x.mf<T>(); }",
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{"-fno-delayed-template-parsing"});
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auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.mf<T>()"));
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AST = buildASTFromCodeWithArgs("template <class T> void f() { T x; x.mf(); }",
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{"-fno-delayed-template-parsing"});
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.mf()"));
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AST = buildASTFromCodeWithArgs(
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"template <class T> struct X;"
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"template <class T> void f() { X<T> x; x.mf(); }",
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{"-fno-delayed-template-parsing"});
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.mf()"));
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}
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TEST(ExprMutationAnalyzerTest, ConstMemberFunc) {
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const auto AST = buildASTFromCode(
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"void f() { struct Foo { void mf() const; }; Foo x; x.mf(); }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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}
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TEST(ExprMutationAnalyzerTest, TypeDependentMemberCall) {
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const auto AST = buildASTFromCodeWithArgs(
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"template <class T> class vector { void push_back(T); }; "
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"template <class T> void f() { vector<T> x; x.push_back(T()); }",
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{"-fno-delayed-template-parsing"});
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.push_back(T())"));
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}
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// Section: overloaded operators
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TEST(ExprMutationAnalyzerTest, NonConstOperator) {
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const auto AST = buildASTFromCode(
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"void f() { struct Foo { Foo& operator=(int); }; Foo x; x = 10; }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x = 10"));
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}
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TEST(ExprMutationAnalyzerTest, ConstOperator) {
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const auto AST = buildASTFromCode(
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"void f() { struct Foo { int operator()() const; }; Foo x; x(); }");
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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}
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TEST(ExprMutationAnalyzerTest, UnresolvedOperator) {
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const auto AST = buildASTFromCodeWithArgs(
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"template <typename Stream> void input_operator_template() {"
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"Stream x; unsigned y = 42;"
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"x >> y; }",
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{"-fno-delayed-template-parsing"});
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const auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_TRUE(isMutated(Results, AST.get()));
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}
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// Section: expression as call argument
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TEST(ExprMutationAnalyzerTest, ByValueArgument) {
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auto AST = buildASTFromCode("void g(int); void f() { int x; g(x); }");
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auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode("void g(int*); void f() { int* x; g(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode("typedef int* IntPtr;"
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"void g(IntPtr); void f() { int* x; g(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode(
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"struct A {}; A operator+(A, int); void f() { A x; x + 1; }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode("void f() { struct A { A(int); }; int x; A y(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode("struct A { A(); A& operator=(A); };"
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"void f() { A x, y; y = x; }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode(
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"template <int> struct A { A(); A(const A&); static void mf(A) {} };"
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"void f() { A<0> x; A<0>::mf(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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}
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TEST(ExprMutationAnalyzerTest, ByConstValueArgument) {
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auto AST = buildASTFromCode("void g(const int); void f() { int x; g(x); }");
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auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode("void g(int* const); void f() { int* x; g(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode("typedef int* const CIntPtr;"
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"void g(CIntPtr); void f() { int* x; g(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode(
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"struct A {}; A operator+(const A, int); void f() { A x; x + 1; }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode(
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"void f() { struct A { A(const int); }; int x; A y(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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AST = buildASTFromCode("template <int> struct A { A(); A(const A&);"
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"static void mf(const A&) {} };"
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"void f() { A<0> x; A<0>::mf(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_FALSE(isMutated(Results, AST.get()));
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}
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TEST(ExprMutationAnalyzerTest, ByNonConstRefArgument) {
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auto AST = buildASTFromCode("void g(int&); void f() { int x; g(x); }");
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auto Results =
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match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
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AST = buildASTFromCode("typedef int& IntRef;"
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"void g(IntRef); void f() { int x; g(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
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AST = buildASTFromCode("template <class T> using TRef = T&;"
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"void g(TRef<int>); void f() { int x; g(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
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AST = buildASTFromCode(
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"template <class T> struct identity { using type = T; };"
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"template <class T, class U = T&> void g(typename identity<U>::type);"
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"void f() { int x; g<int>(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g<int>(x)"));
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AST = buildASTFromCode("typedef int* IntPtr;"
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"void g(IntPtr&); void f() { int* x; g(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
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AST = buildASTFromCode("typedef int* IntPtr; typedef IntPtr& IntPtrRef;"
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"void g(IntPtrRef); void f() { int* x; g(x); }");
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Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
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EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
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AST = buildASTFromCode(
|
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"struct A {}; A operator+(A&, int); void f() { A x; x + 1; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x + 1"));
|
|
|
|
AST = buildASTFromCode("void f() { struct A { A(int&); }; int x; A y(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x"));
|
|
|
|
AST = buildASTFromCode("void f() { struct A { A(); A(A&); }; A x; A y(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x"));
|
|
|
|
AST = buildASTFromCode(
|
|
"template <int> struct A { A(); A(const A&); static void mf(A&) {} };"
|
|
"void f() { A<0> x; A<0>::mf(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("A<0>::mf(x)"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ByNonConstRefArgumentFunctionTypeDependent) {
|
|
auto AST = buildASTFromCodeWithArgs(
|
|
"enum MyEnum { foo, bar };"
|
|
"void tryParser(unsigned& first, MyEnum Type) { first++, (void)Type; }"
|
|
"template <MyEnum Type> void parse() {"
|
|
" auto parser = [](unsigned& first) { first++; tryParser(first, Type); "
|
|
"};"
|
|
" unsigned x = 42;"
|
|
" parser(x);"
|
|
"}",
|
|
{"-fno-delayed-template-parsing"});
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("parser(x)"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ByConstRefArgument) {
|
|
auto AST = buildASTFromCode("void g(const int&); void f() { int x; g(x); }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("typedef const int& CIntRef;"
|
|
"void g(CIntRef); void f() { int x; g(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("template <class T> using CTRef = const T&;"
|
|
"void g(CTRef<int>); void f() { int x; g(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST =
|
|
buildASTFromCode("template <class T> struct identity { using type = T; };"
|
|
"template <class T, class U = const T&>"
|
|
"void g(typename identity<U>::type);"
|
|
"void f() { int x; g<int>(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(
|
|
"struct A {}; A operator+(const A&, int); void f() { A x; x + 1; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(
|
|
"void f() { struct A { A(const int&); }; int x; A y(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(
|
|
"void f() { struct A { A(); A(const A&); }; A x; A y(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ByNonConstRRefArgument) {
|
|
auto AST = buildASTFromCode(
|
|
"void g(int&&); void f() { int x; g(static_cast<int &&>(x)); }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("g(static_cast<int &&>(x))"));
|
|
|
|
AST = buildASTFromCode("struct A {}; A operator+(A&&, int);"
|
|
"void f() { A x; static_cast<A &&>(x) + 1; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<A &&>(x) + 1"));
|
|
|
|
AST = buildASTFromCode("void f() { struct A { A(int&&); }; "
|
|
"int x; A y(static_cast<int &&>(x)); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<int &&>(x)"));
|
|
|
|
AST = buildASTFromCode("void f() { struct A { A(); A(A&&); }; "
|
|
"A x; A y(static_cast<A &&>(x)); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<A &&>(x)"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ByConstRRefArgument) {
|
|
auto AST = buildASTFromCode(
|
|
"void g(const int&&); void f() { int x; g(static_cast<int&&>(x)); }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<int &&>(x)"));
|
|
|
|
AST = buildASTFromCode("struct A {}; A operator+(const A&&, int);"
|
|
"void f() { A x; static_cast<A&&>(x) + 1; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<A &&>(x)"));
|
|
|
|
AST = buildASTFromCode("void f() { struct A { A(const int&&); }; "
|
|
"int x; A y(static_cast<int&&>(x)); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<int &&>(x)"));
|
|
|
|
AST = buildASTFromCode("void f() { struct A { A(); A(const A&&); }; "
|
|
"A x; A y(static_cast<A&&>(x)); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<A &&>(x)"));
|
|
}
|
|
|
|
// section: explicit std::move and std::forward testing
|
|
|
|
TEST(ExprMutationAnalyzerTest, Move) {
|
|
auto AST = buildASTFromCode(StdRemoveReference + StdMove +
|
|
"void f() { struct A {}; A x; std::move(x); }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(StdRemoveReference + StdMove +
|
|
"void f() { struct A {}; A x, y; std::move(x) = y; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("std::move(x) = y"));
|
|
|
|
AST = buildASTFromCode(StdRemoveReference + StdMove +
|
|
"void f() { int x, y; y = std::move(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST =
|
|
buildASTFromCode(StdRemoveReference + StdMove +
|
|
"struct S { S(); S(const S&); S& operator=(const S&); };"
|
|
"void f() { S x, y; y = std::move(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(StdRemoveReference + StdMove +
|
|
"struct S { S(); S(S&&); S& operator=(S&&); };"
|
|
"void f() { S x, y; y = std::move(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("y = std::move(x)"));
|
|
|
|
AST = buildASTFromCode(StdRemoveReference + StdMove +
|
|
"struct S { S(); S(const S&); S(S&&);"
|
|
"S& operator=(const S&); S& operator=(S&&); };"
|
|
"void f() { S x, y; y = std::move(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("y = std::move(x)"));
|
|
|
|
AST = buildASTFromCode(StdRemoveReference + StdMove +
|
|
"struct S { S(); S(const S&); S(S&&);"
|
|
"S& operator=(const S&); S& operator=(S&&); };"
|
|
"void f() { const S x; S y; y = std::move(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(StdRemoveReference + StdMove +
|
|
"struct S { S(); S& operator=(S); };"
|
|
"void f() { S x, y; y = std::move(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(StdRemoveReference + StdMove +
|
|
"struct S{}; void f() { S x, y; y = std::move(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("y = std::move(x)"));
|
|
|
|
AST = buildASTFromCode(
|
|
StdRemoveReference + StdMove +
|
|
"struct S{}; void f() { const S x; S y; y = std::move(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, Forward) {
|
|
auto AST =
|
|
buildASTFromCode(StdRemoveReference + StdForward +
|
|
"void f() { struct A {}; A x; std::forward<A &>(x); }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(
|
|
StdRemoveReference + StdForward +
|
|
"void f() { struct A {}; A x, y; std::forward<A &>(x) = y; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("std::forward<A &>(x) = y"));
|
|
}
|
|
|
|
// section: template constellations that prohibit reasoning about modifications
|
|
// as it depends on instantiations.
|
|
|
|
TEST(ExprMutationAnalyzerTest, CallUnresolved) {
|
|
auto AST =
|
|
buildASTFromCodeWithArgs("template <class T> void f() { T x; g(x); }",
|
|
{"-fno-delayed-template-parsing"});
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
|
|
|
|
AST =
|
|
buildASTFromCodeWithArgs("template <int N> void f() { char x[N]; g(x); }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
|
|
|
|
AST = buildASTFromCodeWithArgs(
|
|
"template <class T> void f(T t) { int x; g(t, x); }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(t, x)"));
|
|
|
|
AST = buildASTFromCodeWithArgs(
|
|
"template <class T> void f(T t) { int x; t.mf(x); }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("t.mf(x)"));
|
|
|
|
AST = buildASTFromCodeWithArgs(
|
|
"template <class T> struct S;"
|
|
"template <class T> void f() { S<T> s; int x; s.mf(x); }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("s.mf(x)"));
|
|
|
|
AST = buildASTFromCodeWithArgs(
|
|
"struct S { template <class T> void mf(); };"
|
|
"template <class T> void f(S s) { int x; s.mf<T>(x); }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("s.mf<T>(x)"));
|
|
|
|
AST = buildASTFromCodeWithArgs("template <class F>"
|
|
"void g(F f) { int x; f(x); } ",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("f(x)"));
|
|
|
|
AST = buildASTFromCodeWithArgs(
|
|
"template <class T> void f() { int x; (void)T(x); }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("T(x)"));
|
|
}
|
|
|
|
// section: return values
|
|
|
|
TEST(ExprMutationAnalyzerTest, ReturnAsValue) {
|
|
auto AST = buildASTFromCode("int f() { int x; return x; }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("int* f() { int* x; return x; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("typedef int* IntPtr;"
|
|
"IntPtr f() { int* x; return x; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ReturnAsNonConstRef) {
|
|
const auto AST = buildASTFromCode("int& f() { int x; return x; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("return x;"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ReturnAsConstRef) {
|
|
const auto AST = buildASTFromCode("const int& f() { int x; return x; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ReturnAsNonConstRRef) {
|
|
const auto AST =
|
|
buildASTFromCode("int&& f() { int x; return static_cast<int &&>(x); }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<int &&>(x)"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ReturnAsConstRRef) {
|
|
const auto AST = buildASTFromCode(
|
|
"const int&& f() { int x; return static_cast<int&&>(x); }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<int &&>(x)"));
|
|
}
|
|
|
|
// section: taking the address of a variable and pointers
|
|
|
|
TEST(ExprMutationAnalyzerTest, TakeAddress) {
|
|
const auto AST = buildASTFromCode("void g(int*); void f() { int x; g(&x); }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("&x"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ArrayToPointerDecay) {
|
|
const auto AST =
|
|
buildASTFromCode("void g(int*); void f() { int x[2]; g(x); }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, TemplateWithArrayToPointerDecay) {
|
|
const auto AST = buildASTFromCodeWithArgs(
|
|
"template <typename T> struct S { static constexpr int v = 8; };"
|
|
"template <> struct S<int> { static constexpr int v = 4; };"
|
|
"void g(char*);"
|
|
"template <typename T> void f() { char x[S<T>::v]; g(x); }"
|
|
"template <> void f<int>() { char y[S<int>::v]; g(y); }",
|
|
{"-fno-delayed-template-parsing"});
|
|
const auto ResultsX =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(ResultsX, AST.get()), ElementsAre("g(x)"));
|
|
const auto ResultsY =
|
|
match(withEnclosingCompound(declRefTo("y")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(ResultsY, AST.get()), ElementsAre("y"));
|
|
}
|
|
|
|
// section: special case: all created references are non-mutating themself
|
|
// and therefore all become 'const'/the value is not modified!
|
|
|
|
TEST(ExprMutationAnalyzerTest, FollowRefModified) {
|
|
auto AST = buildASTFromCode(
|
|
"void f() { int x; int& r0 = x; int& r1 = r0; int& r2 = r1; "
|
|
"int& r3 = r2; r3 = 10; }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("r0", "r1", "r2", "r3", "r3 = 10"));
|
|
|
|
AST = buildASTFromCode("typedef int& IntRefX;"
|
|
"using IntRefY = int&;"
|
|
"void f() { int x; IntRefX r0 = x; IntRefY r1 = r0;"
|
|
"decltype((x)) r2 = r1; r2 = 10; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("r0", "r1", "r2", "r2 = 10"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, FollowRefNotModified) {
|
|
auto AST = buildASTFromCode(
|
|
"void f() { int x; int& r0 = x; int& r1 = r0; int& r2 = r1; "
|
|
"int& r3 = r2; int& r4 = r3; int& r5 = r4;}");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("void f() { int x; int& r0 = x; const int& r1 = r0;}");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("typedef const int& CIntRefX;"
|
|
"using CIntRefY = const int&;"
|
|
"void f() { int x; int& r0 = x; CIntRefX r1 = r0;"
|
|
"CIntRefY r2 = r1; decltype((r1)) r3 = r2;}");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, FollowConditionalRefModified) {
|
|
const auto AST = buildASTFromCode(
|
|
"void f() { int x, y; bool b; int &r = b ? x : y; r = 10; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("r", "r = 10"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, FollowConditionalRefNotModified) {
|
|
const auto AST =
|
|
buildASTFromCode("void f() { int x, y; bool b; int& r = b ? x : y; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, FollowFuncArgModified) {
|
|
auto AST = buildASTFromCode("template <class T> void g(T&& t) { t = 10; }"
|
|
"void f() { int x; g(x); }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
|
|
|
|
AST = buildASTFromCode(
|
|
"void h(int&);"
|
|
"template <class... Args> void g(Args&&... args) { h(args...); }"
|
|
"void f() { int x; g(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
|
|
|
|
AST = buildASTFromCode(
|
|
"void h(int&, int);"
|
|
"template <class... Args> void g(Args&&... args) { h(args...); }"
|
|
"void f() { int x, y; g(x, y); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x, y)"));
|
|
Results = match(withEnclosingCompound(declRefTo("y")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(
|
|
"void h(int, int&);"
|
|
"template <class... Args> void g(Args&&... args) { h(args...); }"
|
|
"void f() { int x, y; g(y, x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(y, x)"));
|
|
Results = match(withEnclosingCompound(declRefTo("y")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("struct S { template <class T> S(T&& t) { t = 10; } };"
|
|
"void f() { int x; S s(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x"));
|
|
|
|
AST = buildASTFromCode(
|
|
"struct S { template <class T> S(T&& t) : m(++t) { } int m; };"
|
|
"void f() { int x; S s(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x"));
|
|
|
|
AST = buildASTFromCode("template <class U> struct S {"
|
|
"template <class T> S(T&& t) : m(++t) { } U m; };"
|
|
"void f() { int x; S<int> s(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x"));
|
|
|
|
AST = buildASTFromCode(StdRemoveReference + StdForward +
|
|
"template <class... Args> void u(Args&...);"
|
|
"template <class... Args> void h(Args&&... args)"
|
|
"{ u(std::forward<Args>(args)...); }"
|
|
"template <class... Args> void g(Args&&... args)"
|
|
"{ h(std::forward<Args>(args)...); }"
|
|
"void f() { int x; g(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, FollowFuncArgNotModified) {
|
|
auto AST = buildASTFromCode("template <class T> void g(T&&) {}"
|
|
"void f() { int x; g(x); }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("template <class T> void g(T&& t) { t; }"
|
|
"void f() { int x; g(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("template <class... Args> void g(Args&&...) {}"
|
|
"void f() { int x; g(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("template <class... Args> void g(Args&&...) {}"
|
|
"void f() { int y, x; g(y, x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(
|
|
"void h(int, int&);"
|
|
"template <class... Args> void g(Args&&... args) { h(args...); }"
|
|
"void f() { int x, y; g(x, y); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("struct S { template <class T> S(T&& t) { t; } };"
|
|
"void f() { int x; S s(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(
|
|
"struct S { template <class T> S(T&& t) : m(t) { } int m; };"
|
|
"void f() { int x; S s(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("template <class U> struct S {"
|
|
"template <class T> S(T&& t) : m(t) { } U m; };"
|
|
"void f() { int x; S<int> s(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(StdRemoveReference + StdForward +
|
|
"template <class... Args> void u(Args...);"
|
|
"template <class... Args> void h(Args&&... args)"
|
|
"{ u(std::forward<Args>(args)...); }"
|
|
"template <class... Args> void g(Args&&... args)"
|
|
"{ h(std::forward<Args>(args)...); }"
|
|
"void f() { int x; g(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
// section: builtin arrays
|
|
|
|
TEST(ExprMutationAnalyzerTest, ArrayElementModified) {
|
|
const auto AST = buildASTFromCode("void f() { int x[2]; x[0] = 10; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x[0] = 10"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ArrayElementNotModified) {
|
|
const auto AST = buildASTFromCode("void f() { int x[2]; x[0]; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
// section: member modifications
|
|
|
|
TEST(ExprMutationAnalyzerTest, NestedMemberModified) {
|
|
auto AST =
|
|
buildASTFromCode("void f() { struct A { int vi; }; struct B { A va; }; "
|
|
"struct C { B vb; }; C x; x.vb.va.vi = 10; }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.vb.va.vi = 10"));
|
|
|
|
AST = buildASTFromCodeWithArgs(
|
|
"template <class T> void f() { T x; x.y.z = 10; }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.y.z = 10"));
|
|
|
|
AST = buildASTFromCodeWithArgs(
|
|
"template <class T> struct S;"
|
|
"template <class T> void f() { S<T> x; x.y.z = 10; }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.y.z = 10"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, NestedMemberNotModified) {
|
|
auto AST =
|
|
buildASTFromCode("void f() { struct A { int vi; }; struct B { A va; }; "
|
|
"struct C { B vb; }; C x; x.vb.va.vi; }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCodeWithArgs("template <class T> void f() { T x; x.y.z; }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST =
|
|
buildASTFromCodeWithArgs("template <class T> struct S;"
|
|
"template <class T> void f() { S<T> x; x.y.z; }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
// section: casts
|
|
|
|
TEST(ExprMutationAnalyzerTest, CastToValue) {
|
|
const auto AST =
|
|
buildASTFromCode("void f() { int x; static_cast<double>(x); }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CastToRefModified) {
|
|
auto AST =
|
|
buildASTFromCode("void f() { int x; static_cast<int &>(x) = 10; }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<int &>(x)"));
|
|
|
|
AST = buildASTFromCode("typedef int& IntRef;"
|
|
"void f() { int x; static_cast<IntRef>(x) = 10; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<IntRef>(x)"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CastToRefNotModified) {
|
|
const auto AST =
|
|
buildASTFromCode("void f() { int x; static_cast<int&>(x); }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("static_cast<int &>(x)"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CastToConstRef) {
|
|
auto AST =
|
|
buildASTFromCode("void f() { int x; static_cast<const int&>(x); }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("typedef const int& CIntRef;"
|
|
"void f() { int x; static_cast<CIntRef>(x); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
// section: comma expressions
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprWithAnAssigment) {
|
|
const auto AST = buildASTFromCodeWithArgs(
|
|
"void f() { int x; int y; (x, y) = 5; }", {"-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("y")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprWithDecOp) {
|
|
const auto AST = buildASTFromCodeWithArgs(
|
|
"void f() { int x; int y; (x, y)++; }", {"-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("y")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprWithNonConstMemberCall) {
|
|
const auto AST = buildASTFromCodeWithArgs(
|
|
"class A { public: int mem; void f() { mem ++; } };"
|
|
"void fn() { A o1, o2; (o1, o2).f(); }",
|
|
{"-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("o2")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprWithConstMemberCall) {
|
|
const auto AST = buildASTFromCodeWithArgs(
|
|
"class A { public: int mem; void f() const { } };"
|
|
"void fn() { A o1, o2; (o1, o2).f(); }",
|
|
{"-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("o2")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprWithCallExpr) {
|
|
const auto AST =
|
|
buildASTFromCodeWithArgs("class A { public: int mem; void f(A &O1) {} };"
|
|
"void fn() { A o1, o2; o2.f((o2, o1)); }",
|
|
{"-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("o1")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprWithCallUnresolved) {
|
|
auto AST = buildASTFromCodeWithArgs(
|
|
"template <class T> struct S;"
|
|
"template <class T> void f() { S<T> s; int x, y; s.mf((y, x)); }",
|
|
{"-fno-delayed-template-parsing", "-Wno-unused-value"});
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCodeWithArgs(
|
|
"template <class T> void f(T t) { int x, y; g(t, (y, x)); }",
|
|
{"-fno-delayed-template-parsing", "-Wno-unused-value"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprParmRef) {
|
|
const auto AST =
|
|
buildASTFromCodeWithArgs("class A { public: int mem;};"
|
|
"extern void fn(A &o1);"
|
|
"void fn2 () { A o1, o2; fn((o2, o1)); } ",
|
|
{"-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("o1")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprWithAmpersandOp) {
|
|
const auto AST = buildASTFromCodeWithArgs("class A { public: int mem;};"
|
|
"void fn () { A o1, o2;"
|
|
"void *addr = &(o2, o1); } ",
|
|
{"-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("o1")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprAsReturnAsValue) {
|
|
auto AST = buildASTFromCodeWithArgs("int f() { int x, y; return (x, y); }",
|
|
{"-Wno-unused-value"});
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("y")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaEpxrAsReturnAsNonConstRef) {
|
|
const auto AST = buildASTFromCodeWithArgs(
|
|
"int& f() { int x, y; return (y, x); }", {"-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprAsArrayToPointerDecay) {
|
|
const auto AST =
|
|
buildASTFromCodeWithArgs("void g(int*); "
|
|
"void f() { int x[2], y[2]; g((y, x)); }",
|
|
{"-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaExprAsUniquePtr) {
|
|
const std::string UniquePtrDef = "template <class T> struct UniquePtr {"
|
|
" UniquePtr();"
|
|
" UniquePtr(const UniquePtr&) = delete;"
|
|
" T& operator*() const;"
|
|
" T* operator->() const;"
|
|
"};";
|
|
const auto AST = buildASTFromCodeWithArgs(
|
|
UniquePtrDef + "template <class T> void f() "
|
|
"{ UniquePtr<T> x; UniquePtr<T> y;"
|
|
" (y, x)->mf(); }",
|
|
{"-fno-delayed-template-parsing", "-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, CommaNestedConditional) {
|
|
const std::string Code = "void f() { int x, y = 42;"
|
|
" y, (true ? x : y) = 42; }";
|
|
const auto AST = buildASTFromCodeWithArgs(Code, {"-Wno-unused-value"});
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("(true ? x : y) = 42"));
|
|
}
|
|
|
|
// section: lambda captures
|
|
|
|
TEST(ExprMutationAnalyzerTest, LambdaDefaultCaptureByValue) {
|
|
const auto AST = buildASTFromCode("void f() { int x; [=]() { x; }; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, LambdaExplicitCaptureByValue) {
|
|
const auto AST = buildASTFromCode("void f() { int x; [x]() { x; }; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, LambdaDefaultCaptureByRef) {
|
|
const auto AST = buildASTFromCode("void f() { int x; [&]() { x = 10; }; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre(ResultOf(removeSpace, "[&](){x=10;}")));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, LambdaExplicitCaptureByRef) {
|
|
const auto AST = buildASTFromCode("void f() { int x; [&x]() { x = 10; }; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre(ResultOf(removeSpace, "[&x](){x=10;}")));
|
|
}
|
|
|
|
// section: range-for loops
|
|
|
|
TEST(ExprMutationAnalyzerTest, RangeForArrayByRefModified) {
|
|
auto AST =
|
|
buildASTFromCode("void f() { int x[2]; for (int& e : x) e = 10; }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("for (int &e : x)\n e = 10;"));
|
|
|
|
AST = buildASTFromCode("typedef int& IntRef;"
|
|
"void f() { int x[2]; for (IntRef e : x) e = 10; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("for (IntRef e : x)\n e = 10;"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, RangeForArrayByRefModifiedByImplicitInit) {
|
|
const auto AST =
|
|
buildASTFromCode("void f() { int x[2]; for (int& e : x) e; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, RangeForArrayByValue) {
|
|
auto AST = buildASTFromCode("void f() { int x[2]; for (int e : x) e = 10; }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST =
|
|
buildASTFromCode("void f() { int* x[2]; for (int* e : x) e = nullptr; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(
|
|
"typedef int* IntPtr;"
|
|
"void f() { int* x[2]; for (IntPtr e : x) e = nullptr; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, RangeForArrayByConstRef) {
|
|
auto AST =
|
|
buildASTFromCode("void f() { int x[2]; for (const int& e : x) e; }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("typedef const int& CIntRef;"
|
|
"void f() { int x[2]; for (CIntRef e : x) e; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, RangeForNonArrayByRefModified) {
|
|
const auto AST =
|
|
buildASTFromCode("struct V { int* begin(); int* end(); };"
|
|
"void f() { V x; for (int& e : x) e = 10; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()),
|
|
ElementsAre("for (int &e : x)\n e = 10;"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, RangeForNonArrayByRefNotModified) {
|
|
const auto AST = buildASTFromCode("struct V { int* begin(); int* end(); };"
|
|
"void f() { V x; for (int& e : x) e; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, RangeForNonArrayByValue) {
|
|
const auto AST = buildASTFromCode(
|
|
"struct V { const int* begin() const; const int* end() const; };"
|
|
"void f() { V x; for (int e : x) e; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, RangeForNonArrayByConstRef) {
|
|
const auto AST = buildASTFromCode(
|
|
"struct V { const int* begin() const; const int* end() const; };"
|
|
"void f() { V x; for (const int& e : x) e; }");
|
|
const auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
// section: unevaluated expressions
|
|
|
|
TEST(ExprMutationAnalyzerTest, UnevaluatedExpressions) {
|
|
auto AST = buildASTFromCode("void f() { int x, y; decltype(x = 10) z = y; }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("void f() { int x, y; __typeof(x = 10) z = y; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("void f() { int x, y; __typeof__(x = 10) z = y; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("void f() { int x; sizeof(x = 10); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("void f() { int x; alignof(x = 10); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode("void f() { int x; noexcept(x = 10); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCodeWithArgs("namespace std { class type_info; }"
|
|
"void f() { int x; typeid(x = 10); }",
|
|
{"-frtti"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(
|
|
"void f() { int x; _Generic(x = 10, int: 0, default: 1); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, NotUnevaluatedExpressions) {
|
|
auto AST = buildASTFromCode("void f() { int x; sizeof(int[x++]); }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x++"));
|
|
|
|
AST = buildASTFromCodeWithArgs(
|
|
"namespace std { class type_info; }"
|
|
"struct A { virtual ~A(); }; struct B : A {};"
|
|
"struct X { A& f(); }; void f() { X x; typeid(x.f()); }",
|
|
{"-frtti"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.f()"));
|
|
}
|
|
|
|
// section: special case: smartpointers
|
|
|
|
TEST(ExprMutationAnalyzerTest, UniquePtr) {
|
|
const std::string UniquePtrDef =
|
|
"template <class T> struct UniquePtr {"
|
|
" UniquePtr();"
|
|
" UniquePtr(const UniquePtr&) = delete;"
|
|
" UniquePtr(UniquePtr&&);"
|
|
" UniquePtr& operator=(const UniquePtr&) = delete;"
|
|
" UniquePtr& operator=(UniquePtr&&);"
|
|
" T& operator*() const;"
|
|
" T* operator->() const;"
|
|
"};";
|
|
|
|
auto AST = buildASTFromCode(UniquePtrDef +
|
|
"void f() { UniquePtr<int> x; *x = 10; }");
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("* x = 10"));
|
|
|
|
AST = buildASTFromCode(UniquePtrDef + "void f() { UniquePtr<int> x; *x; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(UniquePtrDef +
|
|
"void f() { UniquePtr<const int> x; *x; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCode(UniquePtrDef + "struct S { int v; };"
|
|
"void f() { UniquePtr<S> x; x->v; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x"));
|
|
|
|
AST = buildASTFromCode(UniquePtrDef +
|
|
"struct S { int v; };"
|
|
"void f() { UniquePtr<const S> x; x->v; }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST =
|
|
buildASTFromCode(UniquePtrDef + "struct S { void mf(); };"
|
|
"void f() { UniquePtr<S> x; x->mf(); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x"));
|
|
|
|
AST = buildASTFromCode(UniquePtrDef +
|
|
"struct S { void mf() const; };"
|
|
"void f() { UniquePtr<const S> x; x->mf(); }");
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results, AST.get()));
|
|
|
|
AST = buildASTFromCodeWithArgs(
|
|
UniquePtrDef + "template <class T> void f() { UniquePtr<T> x; x->mf(); }",
|
|
{"-fno-delayed-template-parsing"});
|
|
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x->mf()"));
|
|
}
|
|
|
|
// section: complex problems detected on real code
|
|
|
|
TEST(ExprMutationAnalyzerTest, UnevaluatedContext) {
|
|
const std::string Example =
|
|
"template <typename T>"
|
|
"struct to_construct : T { to_construct(int &j) {} };"
|
|
"template <typename T>"
|
|
"void placement_new_in_unique_ptr() { int x = 0;"
|
|
" new to_construct<T>(x);"
|
|
"}";
|
|
auto AST =
|
|
buildASTFromCodeWithArgs(Example, {"-fno-delayed-template-parsing"});
|
|
auto Results =
|
|
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
|
|
EXPECT_TRUE(isMutated(Results, AST.get()));
|
|
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("(x)"));
|
|
}
|
|
|
|
TEST(ExprMutationAnalyzerTest, ReproduceFailureMinimal) {
|
|
const std::string Reproducer =
|
|
"namespace std {"
|
|
"template <class T> T forward(T & A) { return static_cast<T&&>(A); }"
|
|
"template <class T> struct __bind {"
|
|
" T f;"
|
|
" template <class V> __bind(T v, V &&) : f(forward(v)) {}"
|
|
"};"
|
|
"}"
|
|
"void f() {"
|
|
" int x = 42;"
|
|
" auto Lambda = [] {};"
|
|
" std::__bind<decltype(Lambda)>(Lambda, x);"
|
|
"}";
|
|
auto AST11 = buildASTFromCodeWithArgs(Reproducer, {"-std=c++11"});
|
|
auto Results11 =
|
|
match(withEnclosingCompound(declRefTo("x")), AST11->getASTContext());
|
|
EXPECT_FALSE(isMutated(Results11, AST11.get()));
|
|
}
|
|
} // namespace clang
|