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[clangtidy] Remove old copy of ExprMutationAnalyzer 

Summary:
This is 2/2 of moving ExprMutationAnalyzer from clangtidy to clang/Analysis.
ExprMutationAnalyzer is moved to clang/Analysis in D51948.
This diff migrates existing usages within clangtidy to point to the new
location and remove the old copy of ExprMutationAnalyzer.

Reviewers: george.karpenkov, JonasToth

Reviewed By: george.karpenkov

Subscribers: mgorny, a.sidorin, Szelethus, cfe-commits

Differential Revision: https://reviews.llvm.org/D51950

llvm-svn: 342006
This commit is contained in:
Shuai Wang 2018-09-11 22:59:46 +00:00
parent 96bd44b3d7
commit f21e8ebb91
7 changed files with 5 additions and 1324 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
clang-tools-extra/clang-tidy/performance/ForRangeCopyCheck.cpp
View File

@ -9,9 +9,9 @@
#include "ForRangeCopyCheck.h"
#include "../utils/DeclRefExprUtils.h"
#include "../utils/ExprMutationAnalyzer.h"
#include "../utils/FixItHintUtils.h"
#include "../utils/TypeTraits.h"
#include "clang/Analysis/Analyses/ExprMutationAnalyzer.h"
using namespace clang::ast_matchers;
@ -88,8 +88,7 @@ bool ForRangeCopyCheck::handleCopyIsOnlyConstReferenced(
// Because the fix (changing to `const auto &`) will introduce an unused
// compiler warning which can't be suppressed.
// Since this case is very rare, it is safe to ignore it.
if (!utils::ExprMutationAnalyzer(*ForRange.getBody(), Context)
.isMutated(&LoopVar) &&
if (!ExprMutationAnalyzer(*ForRange.getBody(), Context).isMutated(&LoopVar) &&
!utils::decl_ref_expr::allDeclRefExprs(LoopVar, *ForRange.getBody(),
Context)
.empty()) {

6
clang-tools-extra/clang-tidy/performance/UnnecessaryValueParamCheck.cpp
View File

@ -10,10 +10,10 @@
#include "UnnecessaryValueParamCheck.h"
#include "../utils/DeclRefExprUtils.h"
#include "../utils/ExprMutationAnalyzer.h"
#include "../utils/FixItHintUtils.h"
#include "../utils/Matchers.h"
#include "../utils/TypeTraits.h"
#include "clang/Analysis/Analyses/ExprMutationAnalyzer.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Lex/Lexer.h"
#include "clang/Lex/Preprocessor.h"
@ -95,14 +95,14 @@ void UnnecessaryValueParamCheck::check(const MatchFinder::MatchResult &Result) {
// Do not trigger on non-const value parameters when they are mutated either
// within the function body or within init expression(s) when the function is
// a ctor.
if (utils::ExprMutationAnalyzer(*Function->getBody(), *Result.Context)
if (ExprMutationAnalyzer(*Function->getBody(), *Result.Context)
.isMutated(Param))
return;
// CXXCtorInitializer might also mutate Param but they're not part of function
// body, so check them separately here.
if (const auto *Ctor = dyn_cast<CXXConstructorDecl>(Function)) {
for (const auto *Init : Ctor->inits()) {
if (utils::ExprMutationAnalyzer(*Init->getInit(), *Result.Context)
if (ExprMutationAnalyzer(*Init->getInit(), *Result.Context)
.isMutated(Param))
return;
}

1
clang-tools-extra/clang-tidy/utils/CMakeLists.txt
View File

@ -3,7 +3,6 @@ set(LLVM_LINK_COMPONENTS support)
add_clang_library(clangTidyUtils
ASTUtils.cpp
DeclRefExprUtils.cpp
ExprMutationAnalyzer.cpp
ExprSequence.cpp
FixItHintUtils.cpp
HeaderFileExtensionsUtils.cpp

313
clang-tools-extra/clang-tidy/utils/ExprMutationAnalyzer.cpp
View File

@ -1,313 +0,0 @@
//===---------- ExprMutationAnalyzer.cpp - clang-tidy ---------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ExprMutationAnalyzer.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "llvm/ADT/STLExtras.h"
namespace clang {
namespace tidy {
namespace utils {
using namespace ast_matchers;
namespace {
AST_MATCHER_P(LambdaExpr, hasCaptureInit, const Expr *, E) {
return llvm::is_contained(Node.capture_inits(), E);
}
AST_MATCHER_P(CXXForRangeStmt, hasRangeStmt,
ast_matchers::internal::Matcher<DeclStmt>, InnerMatcher) {
const DeclStmt *const Range = Node.getRangeStmt();
return InnerMatcher.matches(*Range, Finder, Builder);
}
const ast_matchers::internal::VariadicDynCastAllOfMatcher<Stmt, CXXTypeidExpr>
cxxTypeidExpr;
AST_MATCHER(CXXTypeidExpr, isPotentiallyEvaluated) {
return Node.isPotentiallyEvaluated();
}
const ast_matchers::internal::VariadicDynCastAllOfMatcher<Stmt, CXXNoexceptExpr>
cxxNoexceptExpr;
const ast_matchers::internal::VariadicDynCastAllOfMatcher<Stmt,
GenericSelectionExpr>
genericSelectionExpr;
AST_MATCHER_P(GenericSelectionExpr, hasControllingExpr,
ast_matchers::internal::Matcher<Expr>, InnerMatcher) {
return InnerMatcher.matches(*Node.getControllingExpr(), Finder, Builder);
}
const auto nonConstReferenceType = [] {
return hasUnqualifiedDesugaredType(
referenceType(pointee(unless(isConstQualified()))));
};
const auto nonConstPointerType = [] {
return hasUnqualifiedDesugaredType(
pointerType(pointee(unless(isConstQualified()))));
};
const auto isMoveOnly = [] {
return cxxRecordDecl(
hasMethod(cxxConstructorDecl(isMoveConstructor(), unless(isDeleted()))),
hasMethod(cxxMethodDecl(isMoveAssignmentOperator(), unless(isDeleted()))),
unless(anyOf(hasMethod(cxxConstructorDecl(isCopyConstructor(),
unless(isDeleted()))),
hasMethod(cxxMethodDecl(isCopyAssignmentOperator(),
unless(isDeleted()))))));
};
} // namespace
const Stmt *ExprMutationAnalyzer::findMutation(const Expr *Exp) {
const auto Memoized = Results.find(Exp);
if (Memoized != Results.end())
return Memoized->second;
if (isUnevaluated(Exp))
return Results[Exp] = nullptr;
for (const auto &Finder : {&ExprMutationAnalyzer::findDirectMutation,
&ExprMutationAnalyzer::findMemberMutation,
&ExprMutationAnalyzer::findArrayElementMutation,
&ExprMutationAnalyzer::findCastMutation,
&ExprMutationAnalyzer::findRangeLoopMutation,
&ExprMutationAnalyzer::findReferenceMutation}) {
if (const Stmt *S = (this->*Finder)(Exp))
return Results[Exp] = S;
}
return Results[Exp] = nullptr;
}
bool ExprMutationAnalyzer::isUnevaluated(const Expr *Exp) {
return selectFirst<Expr>(
"expr",
match(
findAll(
expr(equalsNode(Exp),
anyOf(
// `Exp` is part of the underlying expression of
// decltype/typeof if it has an ancestor of
// typeLoc.
hasAncestor(typeLoc(unless(
hasAncestor(unaryExprOrTypeTraitExpr())))),
hasAncestor(expr(anyOf(
// `UnaryExprOrTypeTraitExpr` is unevaluated
// unless it's sizeof on VLA.
unaryExprOrTypeTraitExpr(unless(sizeOfExpr(
hasArgumentOfType(variableArrayType())))),
// `CXXTypeidExpr` is unevaluated unless it's
// applied to an expression of glvalue of
// polymorphic class type.
cxxTypeidExpr(
unless(isPotentiallyEvaluated())),
// The controlling expression of
// `GenericSelectionExpr` is unevaluated.
genericSelectionExpr(hasControllingExpr(
hasDescendant(equalsNode(Exp)))),
cxxNoexceptExpr())))))
.bind("expr")),
Stm, Context)) != nullptr;
}
const Stmt *
ExprMutationAnalyzer::findExprMutation(ArrayRef<BoundNodes> Matches) {
for (const auto &Nodes : Matches) {
if (const Stmt *S = findMutation(Nodes.getNodeAs<Expr>("expr")))
return S;
}
return nullptr;
}
const Stmt *
ExprMutationAnalyzer::findDeclMutation(ArrayRef<BoundNodes> Matches) {
for (const auto &DeclNodes : Matches) {
if (const Stmt *S = findDeclMutation(DeclNodes.getNodeAs<Decl>("decl")))
return S;
}
return nullptr;
}
const Stmt *ExprMutationAnalyzer::findDeclMutation(const Decl *Dec) {
const auto Refs = match(
findAll(declRefExpr(to(equalsNode(Dec))).bind("expr")), Stm, Context);
for (const auto &RefNodes : Refs) {
const auto *E = RefNodes.getNodeAs<Expr>("expr");
if (findMutation(E))
return E;
}
return nullptr;
}
const Stmt *ExprMutationAnalyzer::findDirectMutation(const Expr *Exp) {
// LHS of any assignment operators.
const auto AsAssignmentLhs =
binaryOperator(isAssignmentOperator(), hasLHS(equalsNode(Exp)));
// Operand of increment/decrement operators.
const auto AsIncDecOperand =
unaryOperator(anyOf(hasOperatorName("++"), hasOperatorName("--")),
hasUnaryOperand(equalsNode(Exp)));
// Invoking non-const member function.
// A member function is assumed to be non-const when it is unresolved.
const auto NonConstMethod = cxxMethodDecl(unless(isConst()));
const auto AsNonConstThis =
expr(anyOf(cxxMemberCallExpr(callee(NonConstMethod), on(equalsNode(Exp))),
cxxOperatorCallExpr(callee(NonConstMethod),
hasArgument(0, equalsNode(Exp))),
callExpr(callee(expr(anyOf(
unresolvedMemberExpr(hasObjectExpression(equalsNode(Exp))),
cxxDependentScopeMemberExpr(
hasObjectExpression(equalsNode(Exp)))))))));
// Taking address of 'Exp'.
// We're assuming 'Exp' is mutated as soon as its address is taken, though in
// theory we can follow the pointer and see whether it escaped `Stm` or is
// dereferenced and then mutated. This is left for future improvements.
const auto AsAmpersandOperand =
unaryOperator(hasOperatorName("&"),
// A NoOp implicit cast is adding const.
unless(hasParent(implicitCastExpr(hasCastKind(CK_NoOp)))),
hasUnaryOperand(equalsNode(Exp)));
const auto AsPointerFromArrayDecay =
castExpr(hasCastKind(CK_ArrayToPointerDecay),
unless(hasParent(arraySubscriptExpr())), has(equalsNode(Exp)));
// Treat calling `operator->()` of move-only classes as taking address.
// These are typically smart pointers with unique ownership so we treat
// mutation of pointee as mutation of the smart pointer itself.
const auto AsOperatorArrowThis =
cxxOperatorCallExpr(hasOverloadedOperatorName("->"),
callee(cxxMethodDecl(ofClass(isMoveOnly()),
returns(nonConstPointerType()))),
argumentCountIs(1), hasArgument(0, equalsNode(Exp)));
// Used as non-const-ref argument when calling a function.
// An argument is assumed to be non-const-ref when the function is unresolved.
const auto NonConstRefParam = forEachArgumentWithParam(
equalsNode(Exp), parmVarDecl(hasType(nonConstReferenceType())));
const auto AsNonConstRefArg = anyOf(
callExpr(NonConstRefParam), cxxConstructExpr(NonConstRefParam),
callExpr(callee(expr(anyOf(unresolvedLookupExpr(), unresolvedMemberExpr(),
cxxDependentScopeMemberExpr(),
hasType(templateTypeParmType())))),
hasAnyArgument(equalsNode(Exp))),
cxxUnresolvedConstructExpr(hasAnyArgument(equalsNode(Exp))));
// Captured by a lambda by reference.
// If we're initializing a capture with 'Exp' directly then we're initializing
// a reference capture.
// For value captures there will be an ImplicitCastExpr <LValueToRValue>.
const auto AsLambdaRefCaptureInit = lambdaExpr(hasCaptureInit(Exp));
// Returned as non-const-ref.
// If we're returning 'Exp' directly then it's returned as non-const-ref.
// For returning by value there will be an ImplicitCastExpr <LValueToRValue>.
// For returning by const-ref there will be an ImplicitCastExpr <NoOp> (for
// adding const.)
const auto AsNonConstRefReturn = returnStmt(hasReturnValue(equalsNode(Exp)));
const auto Matches =
match(findAll(stmt(anyOf(AsAssignmentLhs, AsIncDecOperand, AsNonConstThis,
AsAmpersandOperand, AsPointerFromArrayDecay,
AsOperatorArrowThis, AsNonConstRefArg,
AsLambdaRefCaptureInit, AsNonConstRefReturn))
.bind("stmt")),
Stm, Context);
return selectFirst<Stmt>("stmt", Matches);
}
const Stmt *ExprMutationAnalyzer::findMemberMutation(const Expr *Exp) {
// Check whether any member of 'Exp' is mutated.
const auto MemberExprs =
match(findAll(expr(anyOf(memberExpr(hasObjectExpression(equalsNode(Exp))),
cxxDependentScopeMemberExpr(
hasObjectExpression(equalsNode(Exp)))))
.bind("expr")),
Stm, Context);
return findExprMutation(MemberExprs);
}
const Stmt *ExprMutationAnalyzer::findArrayElementMutation(const Expr *Exp) {
// Check whether any element of an array is mutated.
const auto SubscriptExprs = match(
findAll(arraySubscriptExpr(hasBase(ignoringImpCasts(equalsNode(Exp))))
.bind("expr")),
Stm, Context);
return findExprMutation(SubscriptExprs);
}
const Stmt *ExprMutationAnalyzer::findCastMutation(const Expr *Exp) {
// If 'Exp' is casted to any non-const reference type, check the castExpr.
const auto Casts =
match(findAll(castExpr(hasSourceExpression(equalsNode(Exp)),
anyOf(explicitCastExpr(hasDestinationType(
nonConstReferenceType())),
implicitCastExpr(hasImplicitDestinationType(
nonConstReferenceType()))))
.bind("expr")),
Stm, Context);
return findExprMutation(Casts);
}
const Stmt *ExprMutationAnalyzer::findRangeLoopMutation(const Expr *Exp) {
// If range for looping over 'Exp' with a non-const reference loop variable,
// check all declRefExpr of the loop variable.
const auto LoopVars =
match(findAll(cxxForRangeStmt(
hasLoopVariable(
varDecl(hasType(nonConstReferenceType())).bind("decl")),
hasRangeInit(equalsNode(Exp)))),
Stm, Context);
return findDeclMutation(LoopVars);
}
const Stmt *ExprMutationAnalyzer::findReferenceMutation(const Expr *Exp) {
// Follow non-const reference returned by `operator*()` of move-only classes.
// These are typically smart pointers with unique ownership so we treat
// mutation of pointee as mutation of the smart pointer itself.
const auto Ref = match(
findAll(cxxOperatorCallExpr(
hasOverloadedOperatorName("*"),
callee(cxxMethodDecl(ofClass(isMoveOnly()),
returns(hasUnqualifiedDesugaredType(
nonConstReferenceType())))),
argumentCountIs(1), hasArgument(0, equalsNode(Exp)))
.bind("expr")),
Stm, Context);
if (const Stmt *S = findExprMutation(Ref))
return S;
// If 'Exp' is bound to a non-const reference, check all declRefExpr to that.
const auto Refs = match(
stmt(forEachDescendant(
varDecl(
hasType(nonConstReferenceType()),
hasInitializer(anyOf(equalsNode(Exp),
conditionalOperator(anyOf(
hasTrueExpression(equalsNode(Exp)),
hasFalseExpression(equalsNode(Exp)))))),
hasParent(declStmt().bind("stmt")),
// Don't follow the reference in range statement, we've handled
// that separately.
unless(hasParent(declStmt(hasParent(
cxxForRangeStmt(hasRangeStmt(equalsBoundNode("stmt"))))))))
.bind("decl"))),
Stm, Context);
return findDeclMutation(Refs);
}
} // namespace utils
} // namespace tidy
} // namespace clang

56
clang-tools-extra/clang-tidy/utils/ExprMutationAnalyzer.h
View File

@ -1,56 +0,0 @@
//===---------- ExprMutationAnalyzer.h - clang-tidy -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_EXPRMUTATIONANALYZER_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_EXPRMUTATIONANALYZER_H
#include <type_traits>
#include "clang/AST/AST.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "llvm/ADT/DenseMap.h"
namespace clang {
namespace tidy {
namespace utils {
/// Analyzes whether any mutative operations are applied to an expression within
/// a given statement.
class ExprMutationAnalyzer {
public:
ExprMutationAnalyzer(const Stmt &Stm, ASTContext &Context)
: Stm(Stm), Context(Context) {}
bool isMutated(const Decl *Dec) { return findDeclMutation(Dec) != nullptr; }
bool isMutated(const Expr *Exp) { return findMutation(Exp) != nullptr; }
const Stmt *findMutation(const Expr *Exp);
private:
bool isUnevaluated(const Expr *Exp);
const Stmt *findExprMutation(ArrayRef<ast_matchers::BoundNodes> Matches);
const Stmt *findDeclMutation(ArrayRef<ast_matchers::BoundNodes> Matches);
const Stmt *findDeclMutation(const Decl *Dec);
const Stmt *findDirectMutation(const Expr *Exp);
const Stmt *findMemberMutation(const Expr *Exp);
const Stmt *findArrayElementMutation(const Expr *Exp);
const Stmt *findCastMutation(const Expr *Exp);
const Stmt *findRangeLoopMutation(const Expr *Exp);
const Stmt *findReferenceMutation(const Expr *Exp);
const Stmt &Stm;
ASTContext &Context;
llvm::DenseMap<const Expr *, const Stmt *> Results;
};
} // namespace utils
} // namespace tidy
} // namespace clang
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_EXPRMUTATIONANALYZER_H

1
clang-tools-extra/unittests/clang-tidy/CMakeLists.txt
View File

@ -9,7 +9,6 @@ include_directories(${CLANG_LINT_SOURCE_DIR})
add_extra_unittest(ClangTidyTests
ClangTidyDiagnosticConsumerTest.cpp
ClangTidyOptionsTest.cpp
ExprMutationAnalyzerTest.cpp
IncludeInserterTest.cpp
GoogleModuleTest.cpp
LLVMModuleTest.cpp

947
clang-tools-extra/unittests/clang-tidy/ExprMutationAnalyzerTest.cpp
View File

@ -1,947 +0,0 @@
//===---------- ExprMutationAnalyzerTest.cpp - clang-tidy -----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "../clang-tidy/utils/ExprMutationAnalyzer.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Tooling/Tooling.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include <cctype>
namespace clang {
namespace tidy {
namespace test {
using namespace clang::ast_matchers;
using ::testing::ElementsAre;
using ::testing::IsEmpty;
using ::testing::ResultOf;
using ::testing::StartsWith;
using ::testing::Values;
namespace {
using ExprMatcher = internal::Matcher<Expr>;
using StmtMatcher = internal::Matcher<Stmt>;
ExprMatcher declRefTo(StringRef Name) {
return declRefExpr(to(namedDecl(hasName(Name))));
}
StmtMatcher withEnclosingCompound(ExprMatcher Matcher) {
return expr(Matcher, hasAncestor(compoundStmt().bind("stmt"))).bind("expr");
}
bool isMutated(const SmallVectorImpl<BoundNodes> &Results, ASTUnit *AST) {
const auto *const S = selectFirst<Stmt>("stmt", Results);
const auto *const E = selectFirst<Expr>("expr", Results);
return utils::ExprMutationAnalyzer(*S, AST->getASTContext()).isMutated(E);
}
SmallVector<std::string, 1>
mutatedBy(const SmallVectorImpl<BoundNodes> &Results, ASTUnit *AST) {
const auto *const S = selectFirst<Stmt>("stmt", Results);
SmallVector<std::string, 1> Chain;
utils::ExprMutationAnalyzer Analyzer(*S, AST->getASTContext());
for (const auto *E = selectFirst<Expr>("expr", Results); E != nullptr;) {
const Stmt *By = Analyzer.findMutation(E);
std::string buffer;
llvm::raw_string_ostream stream(buffer);
By->printPretty(stream, nullptr, AST->getASTContext().getPrintingPolicy());
Chain.push_back(StringRef(stream.str()).trim().str());
E = dyn_cast<DeclRefExpr>(By);
}
return Chain;
}
std::string removeSpace(std::string s) {
s.erase(std::remove_if(s.begin(), s.end(),
[](char c) { return std::isspace(c); }),
s.end());
return s;
}
} // namespace
TEST(ExprMutationAnalyzerTest, Trivial) {
const auto AST = tooling::buildASTFromCode("void f() { int x; x; }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
}
class AssignmentTest : public ::testing::TestWithParam<std::string> {};
TEST_P(AssignmentTest, AssignmentModifies) {
const std::string ModExpr = "x " + GetParam() + " 10";
const auto AST =
tooling::buildASTFromCode("void f() { int x; " + ModExpr + "; }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre(ModExpr));
}
INSTANTIATE_TEST_CASE_P(AllAssignmentOperators, AssignmentTest,
Values("=", "+=", "-=", "*=", "/=", "%=", "&=", "|=",
"^=", "<<=", ">>="), );
class IncDecTest : public ::testing::TestWithParam<std::string> {};
TEST_P(IncDecTest, IncDecModifies) {
const std::string ModExpr = GetParam();
const auto AST =
tooling::buildASTFromCode("void f() { int x; " + ModExpr + "; }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre(ModExpr));
}
INSTANTIATE_TEST_CASE_P(AllIncDecOperators, IncDecTest,
Values("++x", "--x", "x++", "x--"), );
TEST(ExprMutationAnalyzerTest, NonConstMemberFunc) {
const auto AST = tooling::buildASTFromCode(
"void f() { struct Foo { void mf(); }; Foo x; x.mf(); }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.mf()"));
}
TEST(ExprMutationAnalyzerTest, AssumedNonConstMemberFunc) {
auto AST = tooling::buildASTFromCodeWithArgs(
"struct X { template <class T> void mf(); };"
"template <class T> void f() { X x; x.mf<T>(); }",
{"-fno-delayed-template-parsing"});
auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.mf<T>()"));
AST = tooling::buildASTFromCodeWithArgs(
"template <class T> void f() { T x; x.mf(); }",
{"-fno-delayed-template-parsing"});
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.mf()"));
AST = tooling::buildASTFromCodeWithArgs(
"template <class T> struct X;"
"template <class T> void f() { X<T> x; x.mf(); }",
{"-fno-delayed-template-parsing"});
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x.mf()"));
}
TEST(ExprMutationAnalyzerTest, ConstMemberFunc) {
const auto AST = tooling::buildASTFromCode(
"void f() { struct Foo { void mf() const; }; Foo x; x.mf(); }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, NonConstOperator) {
const auto AST = tooling::buildASTFromCode(
"void f() { struct Foo { Foo& operator=(int); }; Foo x; x = 10; }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x = 10"));
}
TEST(ExprMutationAnalyzerTest, ConstOperator) {
const auto AST = tooling::buildASTFromCode(
"void f() { struct Foo { int operator()() const; }; Foo x; x(); }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, ByValueArgument) {
auto AST =
tooling::buildASTFromCode("void g(int); void f() { int x; g(x); }");
auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode("void g(int*); void f() { int* x; g(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode("typedef int* IntPtr;"
"void g(IntPtr); void f() { int* x; g(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode(
"void f() { struct A {}; A operator+(A, int); A x; x + 1; }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode(
"void f() { struct A { A(int); }; int x; A y(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode(
"void f() { struct A { A(); A(A); }; A x; A y(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, ByConstValueArgument) {
auto AST =
tooling::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 = tooling::buildASTFromCode(
"void g(int* const); void f() { int* x; g(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST =
tooling::buildASTFromCode("typedef int* const CIntPtr;"
"void g(CIntPtr); void f() { int* x; g(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode(
"void f() { struct A {}; A operator+(const A, int); A x; x + 1; }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::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 = tooling::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, ByNonConstRefArgument) {
auto AST =
tooling::buildASTFromCode("void g(int&); void f() { int x; g(x); }");
auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
AST = tooling::buildASTFromCode("typedef int& IntRef;"
"void g(IntRef); void f() { int x; g(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
AST =
tooling::buildASTFromCode("template <class T> using TRef = T&;"
"void g(TRef<int>); void f() { int x; g(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
AST = tooling::buildASTFromCode(
"template <class T> struct identity { using type = T; };"
"template <class T, class U = T&> void g(typename identity<U>::type);"
"void f() { int x; g<int>(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g<int>(x)"));
AST =
tooling::buildASTFromCode("typedef int* IntPtr;"
"void g(IntPtr&); void f() { int* x; g(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
AST = tooling::buildASTFromCode(
"typedef int* IntPtr; typedef IntPtr& IntPtrRef;"
"void g(IntPtrRef); void f() { int* x; g(x); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("g(x)"));
AST = tooling::buildASTFromCode(
"void f() { struct A {}; A operator+(A&, int); A x; x + 1; }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("x + 1"));
AST = tooling::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 = tooling::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"));
}
TEST(ExprMutationAnalyzerTest, ByConstRefArgument) {
auto AST = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::buildASTFromCode(
"void f() { struct A {}; A operator+(const A&, int); A x; x + 1; }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::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 = tooling::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 = tooling::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 = tooling::buildASTFromCode(
"void f() { struct A {}; A operator+(A&&, int); "
"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 = tooling::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 = tooling::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 = tooling::buildASTFromCode(
"void g(const int&&); void f() { int x; g(static_cast<int&&>(x)); }");
auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode(
"void f() { struct A {}; A operator+(const A&&, int); "
"A x; static_cast<A&&>(x) + 1; }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode("void f() { struct A { A(const int&&); }; "
"int x; A y(static_cast<int&&>(x)); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::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_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, Move) {
// Technically almost the same as ByNonConstRRefArgument, just double checking
const auto AST = tooling::buildASTFromCode(
"namespace std {"
"template<class T> struct remove_reference { typedef T type; };"
"template<class T> struct remove_reference<T&> { typedef T type; };"
"template<class T> struct remove_reference<T&&> { typedef T type; };"
"template<class T> typename std::remove_reference<T>::type&& "
"move(T&& t) noexcept; }"
"void f() { struct A {}; A x; std::move(x); }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()), ElementsAre("std::move(x)"));
}
TEST(ExprMutationAnalyzerTest, Forward) {
// Technically almost the same as ByNonConstRefArgument, just double checking
const auto AST = tooling::buildASTFromCode(
"namespace std {"
"template<class T> struct remove_reference { typedef T type; };"
"template<class T> struct remove_reference<T&> { typedef T type; };"
"template<class T> struct remove_reference<T&&> { typedef T type; };"
"template<class T> T&& "
"forward(typename std::remove_reference<T>::type&) noexcept;"
"template<class T> T&& "
"forward(typename std::remove_reference<T>::type&&) noexcept;"
"void f() { struct A {}; A x; std::forward<A &>(x); }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_THAT(mutatedBy(Results, AST.get()),
ElementsAre("std::forward<A &>(x)"));
}
TEST(ExprMutationAnalyzerTest, CallUnresolved) {
auto AST = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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)"));
}
TEST(ExprMutationAnalyzerTest, ReturnAsValue) {
auto AST = tooling::buildASTFromCode("int f() { int x; return x; }");
auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode("int* f() { int* x; return x; }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::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 = tooling::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 =
tooling::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 = tooling::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("return static_cast<int &&>(x);"));
}
TEST(ExprMutationAnalyzerTest, ReturnAsConstRRef) {
const auto AST = tooling::buildASTFromCode(
"const int&& f() { int x; return static_cast<int&&>(x); }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, TakeAddress) {
const auto AST =
tooling::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 =
tooling::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 = tooling::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"));
}
TEST(ExprMutationAnalyzerTest, FollowRefModified) {
auto AST = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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, ArrayElementModified) {
const auto AST =
tooling::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 = tooling::buildASTFromCode("void f() { int x[2]; x[0]; }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, NestedMemberModified) {
auto AST = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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()));
}
TEST(ExprMutationAnalyzerTest, CastToValue) {
const auto AST =
tooling::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 = tooling::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) = 10"));
AST = tooling::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) = 10"));
}
TEST(ExprMutationAnalyzerTest, CastToRefNotModified) {
const auto AST =
tooling::buildASTFromCode("void f() { int x; static_cast<int&>(x); }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, CastToConstRef) {
auto AST = tooling::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 =
tooling::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()));
}
TEST(ExprMutationAnalyzerTest, LambdaDefaultCaptureByValue) {
const auto AST =
tooling::buildASTFromCode("void f() { int x; [=]() { x = 10; }; }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, LambdaExplicitCaptureByValue) {
const auto AST =
tooling::buildASTFromCode("void f() { int x; [x]() { x = 10; }; }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, LambdaDefaultCaptureByRef) {
const auto AST =
tooling::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 =
tooling::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;}")));
}
TEST(ExprMutationAnalyzerTest, RangeForArrayByRefModified) {
auto AST = tooling::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("e", "e = 10"));
AST = tooling::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("e", "e = 10"));
}
TEST(ExprMutationAnalyzerTest, RangeForArrayByRefNotModified) {
const auto AST =
tooling::buildASTFromCode("void f() { int x[2]; for (int& e : x) e; }");
const auto Results =
match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, RangeForArrayByValue) {
auto AST = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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 =
tooling::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("e", "e = 10"));
}
TEST(ExprMutationAnalyzerTest, RangeForNonArrayByRefNotModified) {
const auto AST =
tooling::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_FALSE(isMutated(Results, AST.get()));
}
TEST(ExprMutationAnalyzerTest, RangeForNonArrayByValue) {
const auto AST = tooling::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 = tooling::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()));
}
TEST(ExprMutationAnalyzerTest, UnevaluatedExpressions) {
auto AST = tooling::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 = tooling::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 = tooling::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 = tooling::buildASTFromCode("void f() { int x; sizeof(x = 10); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode("void f() { int x; alignof(x = 10); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode("void f() { int x; noexcept(x = 10); }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::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 = tooling::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 = tooling::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 = tooling::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()"));
}
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 = tooling::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 = tooling::buildASTFromCode(UniquePtrDef +
"void f() { UniquePtr<int> x; *x; }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::buildASTFromCode(UniquePtrDef +
"void f() { UniquePtr<const int> x; *x; }");
Results = match(withEnclosingCompound(declRefTo("x")), AST->getASTContext());
EXPECT_FALSE(isMutated(Results, AST.get()));
AST = tooling::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 = tooling::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 = tooling::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 = tooling::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 = tooling::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()"));
}
} // namespace test
} // namespace tidy
} // namespace clang