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ASTMatchersTraversalTest.cpp
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//= unittests/ASTMatchers/ASTMatchersTraversalTest.cpp - matchers unit tests =//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "ASTMatchersTest.h"
#include "clang/AST/Attrs.inc"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/TargetParser/Host.h"
#include "llvm/TargetParser/Triple.h"
#include "gtest/gtest.h"
namespace clang {
namespace ast_matchers {
TEST(DeclarationMatcher, hasMethod) {
EXPECT_TRUE(matches("class A { void func(); };",
cxxRecordDecl(hasMethod(hasName("func")))));
EXPECT_TRUE(notMatches("class A { void func(); };",
cxxRecordDecl(hasMethod(isPublic()))));
}
TEST(DeclarationMatcher, ClassDerivedFromDependentTemplateSpecialization) {
EXPECT_TRUE(matches(
"template <typename T> struct A {"
" template <typename T2> struct F {};"
"};"
"template <typename T> struct B : A<T>::template F<T> {};"
"B<int> b;",
cxxRecordDecl(hasName("B"), isDerivedFrom(recordDecl()))));
}
TEST(DeclarationMatcher, hasDeclContext) {
EXPECT_TRUE(matches(
"namespace N {"
" namespace M {"
" class D {};"
" }"
"}",
recordDecl(hasDeclContext(namespaceDecl(hasName("M"))))));
EXPECT_TRUE(notMatches(
"namespace N {"
" namespace M {"
" class D {};"
" }"
"}",
recordDecl(hasDeclContext(namespaceDecl(hasName("N"))))));
EXPECT_TRUE(matches("namespace {"
" namespace M {"
" class D {};"
" }"
"}",
recordDecl(hasDeclContext(namespaceDecl(
hasName("M"), hasDeclContext(namespaceDecl()))))));
EXPECT_TRUE(matches("class D{};", decl(hasDeclContext(decl()))));
}
TEST(HasDescendant, MatchesDescendantTypes) {
EXPECT_TRUE(matches("void f() { int i = 3; }",
decl(hasDescendant(loc(builtinType())))));
EXPECT_TRUE(matches("void f() { int i = 3; }",
stmt(hasDescendant(builtinType()))));
EXPECT_TRUE(matches("void f() { int i = 3; }",
stmt(hasDescendant(loc(builtinType())))));
EXPECT_TRUE(matches("void f() { int i = 3; }",
stmt(hasDescendant(qualType(builtinType())))));
EXPECT_TRUE(notMatches("void f() { float f = 2.0f; }",
stmt(hasDescendant(isInteger()))));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f() { int a; float c; int d; int e; }",
functionDecl(forEachDescendant(
varDecl(hasDescendant(isInteger())).bind("x"))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 3)));
}
TEST(HasDescendant, MatchesDescendantsOfTypes) {
EXPECT_TRUE(matches("void f() { int*** i; }",
qualType(hasDescendant(builtinType()))));
EXPECT_TRUE(matches("void f() { int*** i; }",
qualType(hasDescendant(
pointerType(pointee(builtinType()))))));
EXPECT_TRUE(matches("void f() { int*** i; }",
typeLoc(hasDescendant(loc(builtinType())))));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f() { int*** i; }",
qualType(asString("int ***"), forEachDescendant(pointerType().bind("x"))),
std::make_unique<VerifyIdIsBoundTo<Type>>("x", 2)));
}
TEST(Has, MatchesChildrenOfTypes) {
EXPECT_TRUE(matches("int i;",
varDecl(hasName("i"), has(isInteger()))));
EXPECT_TRUE(notMatches("int** i;",
varDecl(hasName("i"), has(isInteger()))));
EXPECT_TRUE(matchAndVerifyResultTrue(
"int (*f)(float, int);",
qualType(functionType(), forEach(qualType(isInteger()).bind("x"))),
std::make_unique<VerifyIdIsBoundTo<QualType>>("x", 2)));
}
TEST(Has, MatchesChildTypes) {
EXPECT_TRUE(matches(
"int* i;",
varDecl(hasName("i"), hasType(qualType(has(builtinType()))))));
EXPECT_TRUE(notMatches(
"int* i;",
varDecl(hasName("i"), hasType(qualType(has(pointerType()))))));
}
TEST(StatementMatcher, Has) {
StatementMatcher HasVariableI =
expr(hasType(pointsTo(recordDecl(hasName("X")))),
has(ignoringParenImpCasts(declRefExpr(to(varDecl(hasName("i")))))));
EXPECT_TRUE(matches(
"class X; X *x(int); void c() { int i; x(i); }", HasVariableI));
EXPECT_TRUE(notMatches(
"class X; X *x(int); void c() { int i; x(42); }", HasVariableI));
}
TEST(StatementMatcher, HasDescendant) {
StatementMatcher HasDescendantVariableI =
expr(hasType(pointsTo(recordDecl(hasName("X")))),
hasDescendant(declRefExpr(to(varDecl(hasName("i"))))));
EXPECT_TRUE(matches(
"class X; X *x(bool); bool b(int); void c() { int i; x(b(i)); }",
HasDescendantVariableI));
EXPECT_TRUE(notMatches(
"class X; X *x(bool); bool b(int); void c() { int i; x(b(42)); }",
HasDescendantVariableI));
}
TEST(TypeMatcher, MatchesClassType) {
TypeMatcher TypeA = hasDeclaration(recordDecl(hasName("A")));
EXPECT_TRUE(matches("class A { public: A *a; };", TypeA));
EXPECT_TRUE(notMatches("class A {};", TypeA));
TypeMatcher TypeDerivedFromA =
hasDeclaration(cxxRecordDecl(isDerivedFrom("A")));
EXPECT_TRUE(matches("class A {}; class B : public A { public: B *b; };",
TypeDerivedFromA));
EXPECT_TRUE(notMatches("class A {};", TypeA));
TypeMatcher TypeAHasClassB = hasDeclaration(
recordDecl(hasName("A"), has(recordDecl(hasName("B")))));
EXPECT_TRUE(
matches("class A { public: A *a; class B {}; };", TypeAHasClassB));
EXPECT_TRUE(matchesC("struct S {}; void f(void) { struct S s; }",
varDecl(hasType(namedDecl(hasName("S"))))));
}
TEST(TypeMatcher, MatchesDeclTypes) {
// TypedefType -> TypedefNameDecl
EXPECT_TRUE(matches("typedef int I; void f(I i);",
parmVarDecl(hasType(namedDecl(hasName("I"))))));
// ObjCObjectPointerType
EXPECT_TRUE(matchesObjC("@interface Foo @end void f(Foo *f);",
parmVarDecl(hasType(objcObjectPointerType()))));
// ObjCObjectPointerType -> ObjCInterfaceType -> ObjCInterfaceDecl
EXPECT_TRUE(matchesObjC(
"@interface Foo @end void f(Foo *f);",
parmVarDecl(hasType(pointsTo(objcInterfaceDecl(hasName("Foo")))))));
// TemplateTypeParmType
EXPECT_TRUE(matches("template <typename T> void f(T t);",
parmVarDecl(hasType(templateTypeParmType()))));
// TemplateTypeParmType -> TemplateTypeParmDecl
EXPECT_TRUE(matches("template <typename T> void f(T t);",
parmVarDecl(hasType(namedDecl(hasName("T"))))));
// InjectedClassNameType
EXPECT_TRUE(matches("template <typename T> struct S {"
" void f(S s);"
"};",
parmVarDecl(hasType(elaboratedType(
namesType(injectedClassNameType()))))));
EXPECT_TRUE(notMatches("template <typename T> struct S {"
" void g(S<T> s);"
"};",
parmVarDecl(hasType(elaboratedType(
namesType(injectedClassNameType()))))));
// InjectedClassNameType -> CXXRecordDecl
EXPECT_TRUE(matches("template <typename T> struct S {"
" void f(S s);"
"};",
parmVarDecl(hasType(namedDecl(hasName("S"))))));
static const char Using[] = "template <typename T>"
"struct Base {"
" typedef T Foo;"
"};"
""
"template <typename T>"
"struct S : private Base<T> {"
" using typename Base<T>::Foo;"
" void f(Foo);"
"};";
// UnresolvedUsingTypenameDecl
EXPECT_TRUE(matches(Using, unresolvedUsingTypenameDecl(hasName("Foo"))));
// UnresolvedUsingTypenameType -> UnresolvedUsingTypenameDecl
EXPECT_TRUE(matches(Using, parmVarDecl(hasType(namedDecl(hasName("Foo"))))));
}
TEST(HasDeclaration, HasDeclarationOfEnumType) {
EXPECT_TRUE(matches("enum X {}; void y(X *x) { x; }",
expr(hasType(pointsTo(
qualType(hasDeclaration(enumDecl(hasName("X")))))))));
}
TEST(HasDeclaration, HasGetDeclTraitTest) {
static_assert(internal::has_getDecl<TypedefType>::value,
"Expected TypedefType to have a getDecl.");
static_assert(internal::has_getDecl<RecordType>::value,
"Expected RecordType to have a getDecl.");
static_assert(!internal::has_getDecl<TemplateSpecializationType>::value,
"Expected TemplateSpecializationType to *not* have a getDecl.");
}
TEST(HasDeclaration, ElaboratedType) {
EXPECT_TRUE(matches(
"namespace n { template <typename T> struct X {}; }"
"void f(n::X<int>);",
parmVarDecl(hasType(qualType(hasDeclaration(cxxRecordDecl()))))));
EXPECT_TRUE(matches(
"namespace n { template <typename T> struct X {}; }"
"void f(n::X<int>);",
parmVarDecl(hasType(elaboratedType(hasDeclaration(cxxRecordDecl()))))));
}
TEST(HasDeclaration, HasDeclarationOfTypeWithDecl) {
EXPECT_TRUE(matches(
"typedef int X; X a;",
varDecl(hasName("a"), hasType(elaboratedType(namesType(
typedefType(hasDeclaration(decl()))))))));
// FIXME: Add tests for other types with getDecl() (e.g. RecordType)
}
TEST(HasDeclaration, HasDeclarationOfTemplateSpecializationType) {
EXPECT_TRUE(matches(
"template <typename T> class A {}; A<int> a;",
varDecl(hasType(elaboratedType(namesType(templateSpecializationType(
hasDeclaration(namedDecl(hasName("A"))))))))));
EXPECT_TRUE(matches(
"template <typename T> class A {};"
"template <typename T> class B { A<T> a; };",
fieldDecl(hasType(elaboratedType(namesType(templateSpecializationType(
hasDeclaration(namedDecl(hasName("A"))))))))));
EXPECT_TRUE(matches(
"template <typename T> class A {}; A<int> a;",
varDecl(hasType(elaboratedType(namesType(
templateSpecializationType(hasDeclaration(cxxRecordDecl()))))))));
}
TEST(HasDeclaration, HasDeclarationOfCXXNewExpr) {
EXPECT_TRUE(
matches("int *A = new int();",
cxxNewExpr(hasDeclaration(functionDecl(parameterCountIs(1))))));
}
TEST(HasDeclaration, HasDeclarationOfTypeAlias) {
EXPECT_TRUE(matches(
"template <typename T> using C = T; C<int> c;",
varDecl(hasType(elaboratedType(namesType(templateSpecializationType(
hasDeclaration(typeAliasTemplateDecl()))))))));
}
TEST(HasDeclaration, HasDeclarationOfObjCInterface) {
EXPECT_TRUE(matchesObjC("@interface BaseClass @end void f() {BaseClass* b;}",
varDecl(hasType(objcObjectPointerType(
pointee(hasDeclaration(objcInterfaceDecl())))))));
}
TEST(HasUnqualifiedDesugaredType, DesugarsUsing) {
EXPECT_TRUE(
matches("struct A {}; using B = A; B b;",
varDecl(hasType(hasUnqualifiedDesugaredType(recordType())))));
EXPECT_TRUE(
matches("struct A {}; using B = A; using C = B; C b;",
varDecl(hasType(hasUnqualifiedDesugaredType(recordType())))));
}
TEST(HasUnderlyingDecl, Matches) {
EXPECT_TRUE(matches("namespace N { template <class T> void f(T t); }"
"template <class T> void g() { using N::f; f(T()); }",
unresolvedLookupExpr(hasAnyDeclaration(
namedDecl(hasUnderlyingDecl(hasName("::N::f")))))));
EXPECT_TRUE(matches(
"namespace N { template <class T> void f(T t); }"
"template <class T> void g() { N::f(T()); }",
unresolvedLookupExpr(hasAnyDeclaration(namedDecl(hasName("::N::f"))))));
EXPECT_TRUE(notMatches(
"namespace N { template <class T> void f(T t); }"
"template <class T> void g() { using N::f; f(T()); }",
unresolvedLookupExpr(hasAnyDeclaration(namedDecl(hasName("::N::f"))))));
}
TEST(HasType, TakesQualTypeMatcherAndMatchesExpr) {
TypeMatcher ClassX = hasDeclaration(recordDecl(hasName("X")));
EXPECT_TRUE(
matches("class X {}; void y(X &x) { x; }", expr(hasType(ClassX))));
EXPECT_TRUE(
notMatches("class X {}; void y(X *x) { x; }",
expr(hasType(ClassX))));
EXPECT_TRUE(
matches("class X {}; void y(X *x) { x; }",
expr(hasType(pointsTo(ClassX)))));
}
TEST(HasType, TakesQualTypeMatcherAndMatchesValueDecl) {
TypeMatcher ClassX = hasDeclaration(recordDecl(hasName("X")));
EXPECT_TRUE(
matches("class X {}; void y() { X x; }", varDecl(hasType(ClassX))));
EXPECT_TRUE(
notMatches("class X {}; void y() { X *x; }", varDecl(hasType(ClassX))));
EXPECT_TRUE(
matches("class X {}; void y() { X *x; }",
varDecl(hasType(pointsTo(ClassX)))));
}
TEST(HasType, TakesQualTypeMatcherAndMatchesCXXBaseSpecifier) {
TypeMatcher ClassX = hasDeclaration(recordDecl(hasName("X")));
CXXBaseSpecifierMatcher BaseClassX = cxxBaseSpecifier(hasType(ClassX));
DeclarationMatcher ClassHasBaseClassX =
cxxRecordDecl(hasDirectBase(BaseClassX));
EXPECT_TRUE(matches("class X {}; class Y : X {};", ClassHasBaseClassX));
EXPECT_TRUE(notMatches("class Z {}; class Y : Z {};", ClassHasBaseClassX));
}
TEST(HasType, TakesDeclMatcherAndMatchesExpr) {
DeclarationMatcher ClassX = recordDecl(hasName("X"));
EXPECT_TRUE(
matches("class X {}; void y(X &x) { x; }", expr(hasType(ClassX))));
EXPECT_TRUE(
notMatches("class X {}; void y(X *x) { x; }",
expr(hasType(ClassX))));
}
TEST(HasType, TakesDeclMatcherAndMatchesValueDecl) {
DeclarationMatcher ClassX = recordDecl(hasName("X"));
EXPECT_TRUE(
matches("class X {}; void y() { X x; }", varDecl(hasType(ClassX))));
EXPECT_TRUE(
notMatches("class X {}; void y() { X *x; }", varDecl(hasType(ClassX))));
}
TEST(HasType, TakesDeclMatcherAndMatchesCXXBaseSpecifier) {
DeclarationMatcher ClassX = recordDecl(hasName("X"));
CXXBaseSpecifierMatcher BaseClassX = cxxBaseSpecifier(hasType(ClassX));
DeclarationMatcher ClassHasBaseClassX =
cxxRecordDecl(hasDirectBase(BaseClassX));
EXPECT_TRUE(matches("class X {}; class Y : X {};", ClassHasBaseClassX));
EXPECT_TRUE(notMatches("class Z {}; class Y : Z {};", ClassHasBaseClassX));
}
TEST(HasType, MatchesTypedefDecl) {
EXPECT_TRUE(matches("typedef int X;", typedefDecl(hasType(asString("int")))));
EXPECT_TRUE(matches("typedef const int T;",
typedefDecl(hasType(asString("const int")))));
EXPECT_TRUE(notMatches("typedef const int T;",
typedefDecl(hasType(asString("int")))));
EXPECT_TRUE(matches("typedef int foo; typedef foo bar;",
typedefDecl(hasType(asString("foo")), hasName("bar"))));
}
TEST(HasType, MatchesTypedefNameDecl) {
EXPECT_TRUE(matches("using X = int;", typedefNameDecl(hasType(asString("int")))));
EXPECT_TRUE(matches("using T = const int;",
typedefNameDecl(hasType(asString("const int")))));
EXPECT_TRUE(notMatches("using T = const int;",
typedefNameDecl(hasType(asString("int")))));
EXPECT_TRUE(matches("using foo = int; using bar = foo;",
typedefNameDecl(hasType(asString("foo")), hasName("bar"))));
}
TEST(HasTypeLoc, MatchesBlockDecl) {
EXPECT_TRUE(matchesConditionally(
"auto x = ^int (int a, int b) { return a + b; };",
blockDecl(hasTypeLoc(loc(asString("int (int, int)")))), true,
{"-fblocks"}));
}
TEST(HasTypeLoc, MatchesCXXBaseSpecifierAndCtorInitializer) {
llvm::StringRef code = R"cpp(
class Foo {};
class Bar : public Foo {
Bar() : Foo() {}
};
)cpp";
EXPECT_TRUE(matches(
code, cxxRecordDecl(hasAnyBase(hasTypeLoc(loc(asString("Foo")))))));
EXPECT_TRUE(
matches(code, cxxCtorInitializer(hasTypeLoc(loc(asString("Foo"))))));
}
TEST(HasTypeLoc, MatchesCXXFunctionalCastExpr) {
EXPECT_TRUE(matches("auto x = int(3);",
cxxFunctionalCastExpr(hasTypeLoc(loc(asString("int"))))));
}
TEST(HasTypeLoc, MatchesCXXNewExpr) {
EXPECT_TRUE(matches("auto* x = new int(3);",
cxxNewExpr(hasTypeLoc(loc(asString("int"))))));
EXPECT_TRUE(matches("class Foo{}; auto* x = new Foo();",
cxxNewExpr(hasTypeLoc(loc(asString("Foo"))))));
}
TEST(HasTypeLoc, MatchesCXXTemporaryObjectExpr) {
EXPECT_TRUE(
matches("struct Foo { Foo(int, int); }; auto x = Foo(1, 2);",
cxxTemporaryObjectExpr(hasTypeLoc(loc(asString("Foo"))))));
}
TEST(HasTypeLoc, MatchesCXXUnresolvedConstructExpr) {
EXPECT_TRUE(
matches("template <typename T> T make() { return T(); }",
cxxUnresolvedConstructExpr(hasTypeLoc(loc(asString("T"))))));
}
TEST(HasTypeLoc, MatchesCompoundLiteralExpr) {
EXPECT_TRUE(
matches("int* x = (int[2]) { 0, 1 };",
compoundLiteralExpr(hasTypeLoc(loc(asString("int[2]"))))));
}
TEST(HasTypeLoc, MatchesDeclaratorDecl) {
EXPECT_TRUE(matches("int x;",
varDecl(hasName("x"), hasTypeLoc(loc(asString("int"))))));
EXPECT_TRUE(matches("int x(3);",
varDecl(hasName("x"), hasTypeLoc(loc(asString("int"))))));
EXPECT_TRUE(matches("struct Foo { Foo(int, int); }; Foo x(1, 2);",
varDecl(hasName("x"), hasTypeLoc(loc(asString("Foo"))))));
// Make sure we don't crash on implicit constructors.
EXPECT_TRUE(notMatches("class X {}; X x;",
declaratorDecl(hasTypeLoc(loc(asString("int"))))));
}
TEST(HasTypeLoc, MatchesExplicitCastExpr) {
EXPECT_TRUE(matches("auto x = (int) 3;",
explicitCastExpr(hasTypeLoc(loc(asString("int"))))));
EXPECT_TRUE(matches("auto x = static_cast<int>(3);",
explicitCastExpr(hasTypeLoc(loc(asString("int"))))));
}
TEST(HasTypeLoc, MatchesObjCPropertyDecl) {
EXPECT_TRUE(matchesObjC(R"objc(
@interface Foo
@property int enabled;
@end
)objc",
objcPropertyDecl(hasTypeLoc(loc(asString("int"))))));
}
TEST(HasTypeLoc, MatchesTemplateArgumentLoc) {
EXPECT_TRUE(matches("template <typename T> class Foo {}; Foo<int> x;",
templateArgumentLoc(hasTypeLoc(loc(asString("int"))))));
}
TEST(HasTypeLoc, MatchesTypedefNameDecl) {
EXPECT_TRUE(matches("typedef int X;",
typedefNameDecl(hasTypeLoc(loc(asString("int"))))));
EXPECT_TRUE(matches("using X = int;",
typedefNameDecl(hasTypeLoc(loc(asString("int"))))));
}
TEST(Callee, MatchesDeclarations) {
StatementMatcher CallMethodX = callExpr(callee(cxxMethodDecl(hasName("x"))));
EXPECT_TRUE(matches("class Y { void x() { x(); } };", CallMethodX));
EXPECT_TRUE(notMatches("class Y { void x() {} };", CallMethodX));
CallMethodX = traverse(TK_AsIs, callExpr(callee(cxxConversionDecl())));
EXPECT_TRUE(
matches("struct Y { operator int() const; }; int i = Y();", CallMethodX));
EXPECT_TRUE(notMatches("struct Y { operator int() const; }; Y y = Y();",
CallMethodX));
}
TEST(Callee, MatchesMemberExpressions) {
EXPECT_TRUE(matches("class Y { void x() { this->x(); } };",
callExpr(callee(memberExpr()))));
EXPECT_TRUE(
notMatches("class Y { void x() { this->x(); } };", callExpr(callee(callExpr()))));
}
TEST(Matcher, Argument) {
StatementMatcher CallArgumentY = callExpr(
hasArgument(0, declRefExpr(to(varDecl(hasName("y"))))));
EXPECT_TRUE(matches("void x(int) { int y; x(y); }", CallArgumentY));
EXPECT_TRUE(
matches("class X { void x(int) { int y; x(y); } };", CallArgumentY));
EXPECT_TRUE(notMatches("void x(int) { int z; x(z); }", CallArgumentY));
StatementMatcher WrongIndex = callExpr(
hasArgument(42, declRefExpr(to(varDecl(hasName("y"))))));
EXPECT_TRUE(notMatches("void x(int) { int y; x(y); }", WrongIndex));
}
TEST(Matcher, AnyArgument) {
auto HasArgumentY = hasAnyArgument(
ignoringParenImpCasts(declRefExpr(to(varDecl(hasName("y"))))));
StatementMatcher CallArgumentY = callExpr(HasArgumentY);
StatementMatcher CtorArgumentY = cxxConstructExpr(HasArgumentY);
StatementMatcher UnresolvedCtorArgumentY =
cxxUnresolvedConstructExpr(HasArgumentY);
StatementMatcher ObjCCallArgumentY = objcMessageExpr(HasArgumentY);
EXPECT_TRUE(matches("void x(int, int) { int y; x(1, y); }", CallArgumentY));
EXPECT_TRUE(matches("void x(int, int) { int y; x(y, 42); }", CallArgumentY));
EXPECT_TRUE(matches("struct Y { Y(int, int); };"
"void x() { int y; (void)Y(1, y); }",
CtorArgumentY));
EXPECT_TRUE(matches("struct Y { Y(int, int); };"
"void x() { int y; (void)Y(y, 42); }",
CtorArgumentY));
EXPECT_TRUE(matches("template <class Y> void x() { int y; (void)Y(1, y); }",
UnresolvedCtorArgumentY));
EXPECT_TRUE(matches("template <class Y> void x() { int y; (void)Y(y, 42); }",
UnresolvedCtorArgumentY));
EXPECT_TRUE(matchesObjC("@interface I -(void)f:(int) y; @end "
"void x(I* i) { int y; [i f:y]; }",
ObjCCallArgumentY));
EXPECT_FALSE(matchesObjC("@interface I -(void)f:(int) z; @end "
"void x(I* i) { int z; [i f:z]; }",
ObjCCallArgumentY));
EXPECT_TRUE(notMatches("void x(int, int) { x(1, 2); }", CallArgumentY));
EXPECT_TRUE(notMatches("struct Y { Y(int, int); };"
"void x() { int y; (void)Y(1, 2); }",
CtorArgumentY));
EXPECT_TRUE(notMatches("template <class Y>"
"void x() { int y; (void)Y(1, 2); }",
UnresolvedCtorArgumentY));
StatementMatcher ImplicitCastedArgument =
traverse(TK_AsIs, callExpr(hasAnyArgument(implicitCastExpr())));
EXPECT_TRUE(matches("void x(long) { int y; x(y); }", ImplicitCastedArgument));
}
TEST(Matcher, HasReceiver) {
EXPECT_TRUE(matchesObjC(
"@interface NSString @end "
"void f(NSString *x) {"
"[x containsString];"
"}",
objcMessageExpr(hasReceiver(declRefExpr(to(varDecl(hasName("x"))))))));
EXPECT_FALSE(matchesObjC(
"@interface NSString +(NSString *) stringWithFormat; @end "
"void f() { [NSString stringWithFormat]; }",
objcMessageExpr(hasReceiver(declRefExpr(to(varDecl(hasName("x"))))))));
}
TEST(Matcher, MatchesMethodsOnLambda) {
StringRef Code = R"cpp(
struct A {
~A() {}
};
void foo()
{
A a;
auto l = [a] { };
auto lCopy = l;
auto lPtrDecay = +[] { };
(void)lPtrDecay;
}
)cpp";
EXPECT_TRUE(matches(
Code, cxxConstructorDecl(
hasBody(compoundStmt()),
hasAncestor(lambdaExpr(hasAncestor(varDecl(hasName("l"))))),
isCopyConstructor())));
EXPECT_TRUE(matches(
Code, cxxConstructorDecl(
hasBody(compoundStmt()),
hasAncestor(lambdaExpr(hasAncestor(varDecl(hasName("l"))))),
isMoveConstructor())));
EXPECT_TRUE(matches(
Code, cxxDestructorDecl(
hasBody(compoundStmt()),
hasAncestor(lambdaExpr(hasAncestor(varDecl(hasName("l"))))))));
EXPECT_TRUE(matches(
Code, cxxConversionDecl(hasBody(compoundStmt(has(returnStmt(
hasReturnValue(implicitCastExpr()))))),
hasAncestor(lambdaExpr(hasAncestor(
varDecl(hasName("lPtrDecay"))))))));
}
TEST(Matcher, MatchesCoroutine) {
FileContentMappings M;
M.push_back(std::make_pair("/coro_header", R"cpp(
namespace std {
template <class... Args>
struct void_t_imp {
using type = void;
};
template <class... Args>
using void_t = typename void_t_imp<Args...>::type;
template <class T, class = void>
struct traits_sfinae_base {};
template <class T>
struct traits_sfinae_base<T, void_t<typename T::promise_type>> {
using promise_type = typename T::promise_type;
};
template <class Ret, class... Args>
struct coroutine_traits : public traits_sfinae_base<Ret> {};
} // namespace std
struct awaitable {
bool await_ready() noexcept;
template <typename F>
void await_suspend(F) noexcept;
void await_resume() noexcept;
} a;
struct promise {
void get_return_object();
awaitable initial_suspend();
awaitable final_suspend() noexcept;
awaitable yield_value(int); // expected-note 2{{candidate}}
void return_value(int); // expected-note 2{{here}}
void unhandled_exception();
};
template <typename... T>
struct std::coroutine_traits<void, T...> { using promise_type = promise; };
namespace std {
template <class PromiseType = void>
struct coroutine_handle {
static coroutine_handle from_address(void *) noexcept;
};
} // namespace std
)cpp"));
StringRef CoReturnCode = R"cpp(
#include <coro_header>
void check_match_co_return() {
co_return 1;
}
)cpp";
EXPECT_TRUE(matchesConditionally(CoReturnCode,
coreturnStmt(isExpansionInMainFile()), true,
{"-std=c++20", "-I/"}, M));
StringRef CoAwaitCode = R"cpp(
#include <coro_header>
void check_match_co_await() {
co_await a;
co_return 1;
}
)cpp";
EXPECT_TRUE(matchesConditionally(CoAwaitCode,
coawaitExpr(isExpansionInMainFile()), true,
{"-std=c++20", "-I/"}, M));
StringRef CoYieldCode = R"cpp(
#include <coro_header>
void check_match_co_yield() {
co_yield 1.0;
co_return 1;
}
)cpp";
EXPECT_TRUE(matchesConditionally(CoYieldCode,
coyieldExpr(isExpansionInMainFile()), true,
{"-std=c++20", "-I/"}, M));
StringRef NonCoroCode = R"cpp(
#include <coro_header>
void non_coro_function() {
}
)cpp";
EXPECT_TRUE(matchesConditionally(CoReturnCode, coroutineBodyStmt(), true,
{"-std=c++20", "-I/"}, M));
EXPECT_TRUE(matchesConditionally(CoAwaitCode, coroutineBodyStmt(), true,
{"-std=c++20", "-I/"}, M));
EXPECT_TRUE(matchesConditionally(CoYieldCode, coroutineBodyStmt(), true,
{"-std=c++20", "-I/"}, M));
EXPECT_FALSE(matchesConditionally(NonCoroCode, coroutineBodyStmt(), true,
{"-std=c++20", "-I/"}, M));
StringRef CoroWithDeclCode = R"cpp(
#include <coro_header>
void coro() {
int thevar;
co_return 1;
}
)cpp";
EXPECT_TRUE(matchesConditionally(
CoroWithDeclCode,
coroutineBodyStmt(hasBody(compoundStmt(
has(declStmt(containsDeclaration(0, varDecl(hasName("thevar")))))))),
true, {"-std=c++20", "-I/"}, M));
StringRef CoroWithTryCatchDeclCode = R"cpp(
#include <coro_header>
void coro() try {
int thevar;
co_return 1;
} catch (...) { co_return 1; }
)cpp";
EXPECT_TRUE(matchesConditionally(
CoroWithTryCatchDeclCode,
coroutineBodyStmt(hasBody(compoundStmt(has(cxxTryStmt(has(compoundStmt(has(
declStmt(containsDeclaration(0, varDecl(hasName("thevar")))))))))))),
true, {"-std=c++20", "-I/"}, M));
}
TEST(Matcher, isClassMessage) {
EXPECT_TRUE(matchesObjC(
"@interface NSString +(NSString *) stringWithFormat; @end "
"void f() { [NSString stringWithFormat]; }",
objcMessageExpr(isClassMessage())));
EXPECT_FALSE(matchesObjC(
"@interface NSString @end "
"void f(NSString *x) {"
"[x containsString];"
"}",
objcMessageExpr(isClassMessage())));
}
TEST(Matcher, isInstanceMessage) {
EXPECT_TRUE(matchesObjC(
"@interface NSString @end "
"void f(NSString *x) {"
"[x containsString];"
"}",
objcMessageExpr(isInstanceMessage())));
EXPECT_FALSE(matchesObjC(
"@interface NSString +(NSString *) stringWithFormat; @end "
"void f() { [NSString stringWithFormat]; }",
objcMessageExpr(isInstanceMessage())));
}
TEST(Matcher, isClassMethod) {
EXPECT_TRUE(matchesObjC(
"@interface Bar + (void)bar; @end",
objcMethodDecl(isClassMethod())));
EXPECT_TRUE(matchesObjC(
"@interface Bar @end"
"@implementation Bar + (void)bar {} @end",
objcMethodDecl(isClassMethod())));
EXPECT_FALSE(matchesObjC(
"@interface Foo - (void)foo; @end",
objcMethodDecl(isClassMethod())));
EXPECT_FALSE(matchesObjC(
"@interface Foo @end "
"@implementation Foo - (void)foo {} @end",
objcMethodDecl(isClassMethod())));
}
TEST(Matcher, isInstanceMethod) {
EXPECT_TRUE(matchesObjC(
"@interface Foo - (void)foo; @end",
objcMethodDecl(isInstanceMethod())));
EXPECT_TRUE(matchesObjC(
"@interface Foo @end "
"@implementation Foo - (void)foo {} @end",
objcMethodDecl(isInstanceMethod())));
EXPECT_FALSE(matchesObjC(
"@interface Bar + (void)bar; @end",
objcMethodDecl(isInstanceMethod())));
EXPECT_FALSE(matchesObjC(
"@interface Bar @end"
"@implementation Bar + (void)bar {} @end",
objcMethodDecl(isInstanceMethod())));
}
TEST(MatcherCXXMemberCallExpr, On) {
StringRef Snippet1 = R"cc(
struct Y {
void m();
};
void z(Y y) { y.m(); }
)cc";
StringRef Snippet2 = R"cc(
struct Y {
void m();
};
struct X : public Y {};
void z(X x) { x.m(); }
)cc";
auto MatchesY = cxxMemberCallExpr(on(hasType(cxxRecordDecl(hasName("Y")))));
EXPECT_TRUE(matches(Snippet1, MatchesY));
EXPECT_TRUE(notMatches(Snippet2, MatchesY));
auto MatchesX = cxxMemberCallExpr(on(hasType(cxxRecordDecl(hasName("X")))));
EXPECT_TRUE(matches(Snippet2, MatchesX));
// Parens are ignored.
StringRef Snippet3 = R"cc(
struct Y {
void m();
};
Y g();
void z(Y y) { (g()).m(); }
)cc";
auto MatchesCall = cxxMemberCallExpr(on(callExpr()));
EXPECT_TRUE(matches(Snippet3, MatchesCall));
}
TEST(MatcherCXXMemberCallExpr, OnImplicitObjectArgument) {
StringRef Snippet1 = R"cc(
struct Y {
void m();
};
void z(Y y) { y.m(); }
)cc";
StringRef Snippet2 = R"cc(
struct Y {
void m();
};
struct X : public Y {};
void z(X x) { x.m(); }
)cc";
auto MatchesY = traverse(TK_AsIs, cxxMemberCallExpr(onImplicitObjectArgument(
hasType(cxxRecordDecl(hasName("Y"))))));
EXPECT_TRUE(matches(Snippet1, MatchesY));
EXPECT_TRUE(matches(Snippet2, MatchesY));
auto MatchesX = traverse(TK_AsIs, cxxMemberCallExpr(onImplicitObjectArgument(
hasType(cxxRecordDecl(hasName("X"))))));
EXPECT_TRUE(notMatches(Snippet2, MatchesX));
// Parens are not ignored.
StringRef Snippet3 = R"cc(
struct Y {
void m();
};
Y g();
void z(Y y) { (g()).m(); }
)cc";
auto MatchesCall = traverse(
TK_AsIs, cxxMemberCallExpr(onImplicitObjectArgument(callExpr())));
EXPECT_TRUE(notMatches(Snippet3, MatchesCall));
}
TEST(Matcher, HasObjectExpr) {
StringRef Snippet1 = R"cc(
struct X {
int m;
int f(X x) { return x.m; }
};
)cc";
StringRef Snippet2 = R"cc(
struct X {
int m;
int f(X x) { return m; }
};
)cc";
auto MatchesX =
memberExpr(hasObjectExpression(hasType(cxxRecordDecl(hasName("X")))));
EXPECT_TRUE(matches(Snippet1, MatchesX));
EXPECT_TRUE(notMatches(Snippet2, MatchesX));
auto MatchesXPointer = memberExpr(
hasObjectExpression(hasType(pointsTo(cxxRecordDecl(hasName("X"))))));
EXPECT_TRUE(notMatches(Snippet1, MatchesXPointer));
EXPECT_TRUE(matches(Snippet2, MatchesXPointer));
}
TEST(ForEachArgumentWithParam, ReportsNoFalsePositives) {
StatementMatcher ArgumentY =
declRefExpr(to(varDecl(hasName("y")))).bind("arg");
DeclarationMatcher IntParam = parmVarDecl(hasType(isInteger())).bind("param");
StatementMatcher CallExpr =
callExpr(forEachArgumentWithParam(ArgumentY, IntParam));
// IntParam does not match.
EXPECT_TRUE(notMatches("void f(int* i) { int* y; f(y); }", CallExpr));
// ArgumentY does not match.
EXPECT_TRUE(notMatches("void f(int i) { int x; f(x); }", CallExpr));
}
TEST(ForEachArgumentWithParam, MatchesCXXMemberCallExpr) {
StatementMatcher ArgumentY =
declRefExpr(to(varDecl(hasName("y")))).bind("arg");
DeclarationMatcher IntParam = parmVarDecl(hasType(isInteger())).bind("param");
StatementMatcher CallExpr =
callExpr(forEachArgumentWithParam(ArgumentY, IntParam));
EXPECT_TRUE(matchAndVerifyResultTrue(
"struct S {"
" const S& operator[](int i) { return *this; }"
"};"
"void f(S S1) {"
" int y = 1;"
" S1[y];"
"}",
CallExpr, std::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>("param", 1)));
StatementMatcher CallExpr2 =
callExpr(forEachArgumentWithParam(ArgumentY, IntParam));
EXPECT_TRUE(matchAndVerifyResultTrue(
"struct S {"
" static void g(int i);"
"};"
"void f() {"
" int y = 1;"
" S::g(y);"
"}",
CallExpr2, std::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>("param", 1)));
}
TEST(ForEachArgumentWithParam, MatchesCallExpr) {
StatementMatcher ArgumentY =
declRefExpr(to(varDecl(hasName("y")))).bind("arg");
DeclarationMatcher IntParam = parmVarDecl(hasType(isInteger())).bind("param");
StatementMatcher CallExpr =
callExpr(forEachArgumentWithParam(ArgumentY, IntParam));
EXPECT_TRUE(
matchAndVerifyResultTrue("void f(int i) { int y; f(y); }", CallExpr,
std::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>(
"param")));
EXPECT_TRUE(
matchAndVerifyResultTrue("void f(int i) { int y; f(y); }", CallExpr,
std::make_unique<VerifyIdIsBoundTo<DeclRefExpr>>(
"arg")));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f(int i, int j) { int y; f(y, y); }", CallExpr,
std::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>("param", 2)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f(int i, int j) { int y; f(y, y); }", CallExpr,
std::make_unique<VerifyIdIsBoundTo<DeclRefExpr>>("arg", 2)));
}
TEST(ForEachArgumentWithParam, MatchesConstructExpr) {
StatementMatcher ArgumentY =
declRefExpr(to(varDecl(hasName("y")))).bind("arg");
DeclarationMatcher IntParam = parmVarDecl(hasType(isInteger())).bind("param");
StatementMatcher ConstructExpr = traverse(
TK_AsIs, cxxConstructExpr(forEachArgumentWithParam(ArgumentY, IntParam)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"struct C {"
" C(int i) {}"
"};"
"int y = 0;"
"C Obj(y);",
ConstructExpr,
std::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>("param")));
}
TEST(ForEachArgumentWithParam, HandlesBoundNodesForNonMatches) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"void g(int i, int j) {"
" int a;"
" int b;"
" int c;"
" g(a, 0);"
" g(a, b);"
" g(0, b);"
"}",
functionDecl(
forEachDescendant(varDecl().bind("v")),
forEachDescendant(callExpr(forEachArgumentWithParam(
declRefExpr(to(decl(equalsBoundNode("v")))), parmVarDecl())))),
std::make_unique<VerifyIdIsBoundTo<VarDecl>>("v", 4)));
}
TEST_P(ASTMatchersTest,
ForEachArgumentWithParamMatchesExplicitObjectParamOnOperatorCalls) {
if (!GetParam().isCXX23OrLater()) {
return;
}
auto DeclRef = declRefExpr(to(varDecl().bind("declOfArg"))).bind("arg");
auto SelfParam = parmVarDecl().bind("param");
StatementMatcher CallExpr =
callExpr(forEachArgumentWithParam(DeclRef, SelfParam));