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ASTMatchersTraversalTest.cpp
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ASTMatchersTraversalTest.cpp
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//= unittests/ASTMatchers/ASTMatchersTraversalTest.cpp - matchers unit tests =//
//
// The LLVM Compiler Infrastructure
//`
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ASTMatchersTest.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Host.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"))),
llvm::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"))),
llvm::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"))),
llvm::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(injectedClassNameType()))));
EXPECT_TRUE(notMatches("template <typename T> struct S {"
" void g(S<T> s);"
"};",
parmVarDecl(hasType(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(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(templateSpecializationType(
hasDeclaration(namedDecl(hasName("A"))))))));
EXPECT_TRUE(matches("template <typename T> class A {};"
"template <typename T> class B { A<T> a; };",
fieldDecl(hasType(templateSpecializationType(
hasDeclaration(namedDecl(hasName("A"))))))));
EXPECT_TRUE(matches("template <typename T> class A {}; A<int> a;",
varDecl(hasType(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(templateSpecializationType(
hasDeclaration(typeAliasTemplateDecl()))))));
}
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, 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, 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, MatchesDeclaratorDecls) {
EXPECT_TRUE(matches("int x;",
varDecl(hasName("x"), hasTypeLoc(loc(asString("int"))))));
// Make sure we don't crash on implicit constructors.
EXPECT_TRUE(notMatches("class X {}; X x;",
declaratorDecl(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 = 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 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(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));
StatementMatcher ImplicitCastedArgument = 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, 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(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, llvm::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, llvm::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,
llvm::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>(
"param")));
EXPECT_TRUE(
matchAndVerifyResultTrue("void f(int i) { int y; f(y); }", CallExpr,
llvm::make_unique<VerifyIdIsBoundTo<DeclRefExpr>>(
"arg")));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f(int i, int j) { int y; f(y, y); }", CallExpr,
llvm::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>("param", 2)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f(int i, int j) { int y; f(y, y); }", CallExpr,
llvm::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 =
cxxConstructExpr(forEachArgumentWithParam(ArgumentY, IntParam));
EXPECT_TRUE(matchAndVerifyResultTrue(
"struct C {"
" C(int i) {}"
"};"
"int y = 0;"
"C Obj(y);",
ConstructExpr,
llvm::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())))),
llvm::make_unique<VerifyIdIsBoundTo<VarDecl>>("v", 4)));
}
TEST(QualType, hasCanonicalType) {
EXPECT_TRUE(notMatches("typedef int &int_ref;"
"int a;"
"int_ref b = a;",
varDecl(hasType(qualType(referenceType())))));
EXPECT_TRUE(
matches("typedef int &int_ref;"
"int a;"
"int_ref b = a;",
varDecl(hasType(qualType(hasCanonicalType(referenceType()))))));
}
TEST(HasParameter, CallsInnerMatcher) {
EXPECT_TRUE(matches("class X { void x(int) {} };",
cxxMethodDecl(hasParameter(0, varDecl()))));
EXPECT_TRUE(notMatches("class X { void x(int) {} };",
cxxMethodDecl(hasParameter(0, hasName("x")))));
EXPECT_TRUE(matchesObjC("@interface I -(void)f:(int) x; @end",
objcMethodDecl(hasParameter(0, hasName("x")))));
EXPECT_TRUE(matchesObjC("int main() { void (^b)(int) = ^(int p) {}; }",
blockDecl(hasParameter(0, hasName("p")))));
}
TEST(HasParameter, DoesNotMatchIfIndexOutOfBounds) {
EXPECT_TRUE(notMatches("class X { void x(int) {} };",
cxxMethodDecl(hasParameter(42, varDecl()))));
}
TEST(HasType, MatchesParameterVariableTypesStrictly) {
EXPECT_TRUE(matches(
"class X { void x(X x) {} };",
cxxMethodDecl(hasParameter(0, hasType(recordDecl(hasName("X")))))));
EXPECT_TRUE(notMatches(
"class X { void x(const X &x) {} };",
cxxMethodDecl(hasParameter(0, hasType(recordDecl(hasName("X")))))));
EXPECT_TRUE(matches("class X { void x(const X *x) {} };",
cxxMethodDecl(hasParameter(
0, hasType(pointsTo(recordDecl(hasName("X"))))))));
EXPECT_TRUE(matches("class X { void x(const X &x) {} };",
cxxMethodDecl(hasParameter(
0, hasType(references(recordDecl(hasName("X"))))))));
}
TEST(HasAnyParameter, MatchesIndependentlyOfPosition) {
EXPECT_TRUE(matches(
"class Y {}; class X { void x(X x, Y y) {} };",
cxxMethodDecl(hasAnyParameter(hasType(recordDecl(hasName("X")))))));
EXPECT_TRUE(matches(
"class Y {}; class X { void x(Y y, X x) {} };",
cxxMethodDecl(hasAnyParameter(hasType(recordDecl(hasName("X")))))));
EXPECT_TRUE(matchesObjC("@interface I -(void)f:(int) x; @end",
objcMethodDecl(hasAnyParameter(hasName("x")))));
EXPECT_TRUE(matchesObjC("int main() { void (^b)(int) = ^(int p) {}; }",
blockDecl(hasAnyParameter(hasName("p")))));
}
TEST(Returns, MatchesReturnTypes) {
EXPECT_TRUE(matches("class Y { int f() { return 1; } };",
functionDecl(returns(asString("int")))));
EXPECT_TRUE(notMatches("class Y { int f() { return 1; } };",
functionDecl(returns(asString("float")))));
EXPECT_TRUE(matches("class Y { Y getMe() { return *this; } };",
functionDecl(returns(hasDeclaration(
recordDecl(hasName("Y")))))));
}
TEST(HasAnyParameter, DoesntMatchIfInnerMatcherDoesntMatch) {
EXPECT_TRUE(notMatches(
"class Y {}; class X { void x(int) {} };",
cxxMethodDecl(hasAnyParameter(hasType(recordDecl(hasName("X")))))));
}
TEST(HasAnyParameter, DoesNotMatchThisPointer) {
EXPECT_TRUE(notMatches("class Y {}; class X { void x() {} };",
cxxMethodDecl(hasAnyParameter(
hasType(pointsTo(recordDecl(hasName("X"))))))));
}
TEST(HasName, MatchesParameterVariableDeclarations) {
EXPECT_TRUE(matches("class Y {}; class X { void x(int x) {} };",
cxxMethodDecl(hasAnyParameter(hasName("x")))));
EXPECT_TRUE(notMatches("class Y {}; class X { void x(int) {} };",
cxxMethodDecl(hasAnyParameter(hasName("x")))));
}
TEST(Matcher, MatchesTypeTemplateArgument) {
EXPECT_TRUE(matches(
"template<typename T> struct B {};"
"B<int> b;",
classTemplateSpecializationDecl(hasAnyTemplateArgument(refersToType(
asString("int"))))));
}
TEST(Matcher, MatchesTemplateTemplateArgument) {
EXPECT_TRUE(matches("template<template <typename> class S> class X {};"
"template<typename T> class Y {};"
"X<Y> xi;",
classTemplateSpecializationDecl(hasAnyTemplateArgument(
refersToTemplate(templateName())))));
}
TEST(Matcher, MatchesDeclarationReferenceTemplateArgument) {
EXPECT_TRUE(matches(
"struct B { int next; };"
"template<int(B::*next_ptr)> struct A {};"
"A<&B::next> a;",
classTemplateSpecializationDecl(hasAnyTemplateArgument(
refersToDeclaration(fieldDecl(hasName("next")))))));
EXPECT_TRUE(notMatches(
"template <typename T> struct A {};"
"A<int> a;",
classTemplateSpecializationDecl(hasAnyTemplateArgument(
refersToDeclaration(decl())))));
EXPECT_TRUE(matches(
"struct B { int next; };"
"template<int(B::*next_ptr)> struct A {};"
"A<&B::next> a;",
templateSpecializationType(hasAnyTemplateArgument(isExpr(
hasDescendant(declRefExpr(to(fieldDecl(hasName("next"))))))))));
EXPECT_TRUE(notMatches(
"template <typename T> struct A {};"
"A<int> a;",
templateSpecializationType(hasAnyTemplateArgument(
refersToDeclaration(decl())))));
}
TEST(Matcher, MatchesSpecificArgument) {
EXPECT_TRUE(matches(
"template<typename T, typename U> class A {};"
"A<bool, int> a;",
classTemplateSpecializationDecl(hasTemplateArgument(
1, refersToType(asString("int"))))));
EXPECT_TRUE(notMatches(
"template<typename T, typename U> class A {};"
"A<int, bool> a;",
classTemplateSpecializationDecl(hasTemplateArgument(
1, refersToType(asString("int"))))));
EXPECT_TRUE(matches(
"template<typename T, typename U> class A {};"
"A<bool, int> a;",
templateSpecializationType(hasTemplateArgument(
1, refersToType(asString("int"))))));
EXPECT_TRUE(notMatches(
"template<typename T, typename U> class A {};"
"A<int, bool> a;",
templateSpecializationType(hasTemplateArgument(
1, refersToType(asString("int"))))));
EXPECT_TRUE(matches(
"template<typename T> void f() {};"
"void func() { f<int>(); }",
functionDecl(hasTemplateArgument(0, refersToType(asString("int"))))));
EXPECT_TRUE(notMatches(
"template<typename T> void f() {};",
functionDecl(hasTemplateArgument(0, refersToType(asString("int"))))));
}
TEST(TemplateArgument, Matches) {
EXPECT_TRUE(matches("template<typename T> struct C {}; C<int> c;",
classTemplateSpecializationDecl(
hasAnyTemplateArgument(templateArgument()))));
EXPECT_TRUE(matches(
"template<typename T> struct C {}; C<int> c;",
templateSpecializationType(hasAnyTemplateArgument(templateArgument()))));
EXPECT_TRUE(matches(
"template<typename T> void f() {};"
"void func() { f<int>(); }",
functionDecl(hasAnyTemplateArgument(templateArgument()))));
}
TEST(TemplateTypeParmDecl, CXXMethodDecl) {
const char input[] =
"template<typename T>\n"
"class Class {\n"
" void method();\n"
"};\n"
"template<typename U>\n"
"void Class<U>::method() {}\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
}
TEST(TemplateTypeParmDecl, VarDecl) {
const char input[] =
"template<typename T>\n"
"class Class {\n"
" static T pi;\n"
"};\n"
"template<typename U>\n"
"U Class<U>::pi = U(3.1415926535897932385);\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
}
TEST(TemplateTypeParmDecl, VarTemplatePartialSpecializationDecl) {
const char input[] =
"template<typename T>\n"
"struct Struct {\n"
" template<typename T2> static int field;\n"
"};\n"
"template<typename U>\n"
"template<typename U2>\n"
"int Struct<U>::field<U2*> = 123;\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T2"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U2"))));
}
TEST(TemplateTypeParmDecl, ClassTemplatePartialSpecializationDecl) {
const char input[] =
"template<typename T>\n"
"class Class {\n"
" template<typename T2> struct Struct;\n"
"};\n"
"template<typename U>\n"
"template<typename U2>\n"
"struct Class<U>::Struct<U2*> {};\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T2"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U2"))));
}
TEST(TemplateTypeParmDecl, EnumDecl) {
const char input[] =
"template<typename T>\n"
"struct Struct {\n"
" enum class Enum : T;\n"
"};\n"
"template<typename U>\n"
"enum class Struct<U>::Enum : U {\n"
" e1,\n"
" e2\n"
"};\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
}
TEST(TemplateTypeParmDecl, RecordDecl) {
const char input[] =
"template<typename T>\n"
"class Class {\n"
" struct Struct;\n"
"};\n"
"template<typename U>\n"
"struct Class<U>::Struct {\n"
" U field;\n"
"};\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
}
TEST(RefersToIntegralType, Matches) {
EXPECT_TRUE(matches("template<int T> struct C {}; C<42> c;",
classTemplateSpecializationDecl(
hasAnyTemplateArgument(refersToIntegralType(
asString("int"))))));
EXPECT_TRUE(notMatches("template<unsigned T> struct C {}; C<42> c;",
classTemplateSpecializationDecl(hasAnyTemplateArgument(
refersToIntegralType(asString("int"))))));
}
TEST(ConstructorDeclaration, SimpleCase) {
EXPECT_TRUE(matches("class Foo { Foo(int i); };",
cxxConstructorDecl(ofClass(hasName("Foo")))));
EXPECT_TRUE(notMatches("class Foo { Foo(int i); };",
cxxConstructorDecl(ofClass(hasName("Bar")))));
}
TEST(DestructorDeclaration, MatchesVirtualDestructor) {
EXPECT_TRUE(matches("class Foo { virtual ~Foo(); };",
cxxDestructorDecl(ofClass(hasName("Foo")))));
}
TEST(DestructorDeclaration, DoesNotMatchImplicitDestructor) {
EXPECT_TRUE(notMatches("class Foo {};",
cxxDestructorDecl(ofClass(hasName("Foo")))));
}
TEST(HasAnyConstructorInitializer, SimpleCase) {
EXPECT_TRUE(
notMatches("class Foo { Foo() { } };",
cxxConstructorDecl(hasAnyConstructorInitializer(anything()))));
EXPECT_TRUE(
matches("class Foo {"
" Foo() : foo_() { }"
" int foo_;"
"};",
cxxConstructorDecl(hasAnyConstructorInitializer(anything()))));
}
TEST(HasAnyConstructorInitializer, ForField) {
static const char Code[] =
"class Baz { };"
"class Foo {"
" Foo() : foo_(), bar_() { }"
" Baz foo_;"
" struct {"
" Baz bar_;"
" };"
"};";
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
forField(hasType(recordDecl(hasName("Baz"))))))));
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
forField(hasName("foo_"))))));
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
forField(hasName("bar_"))))));
EXPECT_TRUE(notMatches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
forField(hasType(recordDecl(hasName("Bar"))))))));
}
TEST(HasAnyConstructorInitializer, WithInitializer) {
static const char Code[] =
"class Foo {"
" Foo() : foo_(0) { }"
" int foo_;"
"};";
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
withInitializer(integerLiteral(equals(0)))))));
EXPECT_TRUE(notMatches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
withInitializer(integerLiteral(equals(1)))))));
}
TEST(HasAnyConstructorInitializer, IsWritten) {
static const char Code[] =
"struct Bar { Bar(){} };"
"class Foo {"
" Foo() : foo_() { }"
" Bar foo_;"
" Bar bar_;"
"};";
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
allOf(forField(hasName("foo_")), isWritten())))));
EXPECT_TRUE(notMatches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
allOf(forField(hasName("bar_")), isWritten())))));
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
allOf(forField(hasName("bar_")), unless(isWritten()))))));
}
TEST(HasAnyConstructorInitializer, IsBaseInitializer) {
static const char Code[] =
"struct B {};"
"struct D : B {"
" int I;"
" D(int i) : I(i) {}"
"};"
"struct E : B {"
" E() : B() {}"
"};";
EXPECT_TRUE(matches(Code, cxxConstructorDecl(allOf(
hasAnyConstructorInitializer(allOf(isBaseInitializer(), isWritten())),
hasName("E")))));
EXPECT_TRUE(notMatches(Code, cxxConstructorDecl(allOf(
hasAnyConstructorInitializer(allOf(isBaseInitializer(), isWritten())),
hasName("D")))));
EXPECT_TRUE(matches(Code, cxxConstructorDecl(allOf(
hasAnyConstructorInitializer(allOf(isMemberInitializer(), isWritten())),
hasName("D")))));
EXPECT_TRUE(notMatches(Code, cxxConstructorDecl(allOf(
hasAnyConstructorInitializer(allOf(isMemberInitializer(), isWritten())),
hasName("E")))));
}
TEST(IfStmt, ChildTraversalMatchers) {
EXPECT_TRUE(matches("void f() { if (false) true; else false; }",
ifStmt(hasThen(cxxBoolLiteral(equals(true))))));
EXPECT_TRUE(notMatches("void f() { if (false) false; else true; }",
ifStmt(hasThen(cxxBoolLiteral(equals(true))))));
EXPECT_TRUE(matches("void f() { if (false) false; else true; }",
ifStmt(hasElse(cxxBoolLiteral(equals(true))))));
EXPECT_TRUE(notMatches("void f() { if (false) true; else false; }",
ifStmt(hasElse(cxxBoolLiteral(equals(true))))));
}
TEST(MatchBinaryOperator, HasOperatorName) {
StatementMatcher OperatorOr = binaryOperator(hasOperatorName("||"));
EXPECT_TRUE(matches("void x() { true || false; }", OperatorOr));
EXPECT_TRUE(notMatches("void x() { true && false; }", OperatorOr));
}
TEST(MatchBinaryOperator, HasLHSAndHasRHS) {
StatementMatcher OperatorTrueFalse =
binaryOperator(hasLHS(cxxBoolLiteral(equals(true))),
hasRHS(cxxBoolLiteral(equals(false))));
EXPECT_TRUE(matches("void x() { true || false; }", OperatorTrueFalse));
EXPECT_TRUE(matches("void x() { true && false; }", OperatorTrueFalse));
EXPECT_TRUE(notMatches("void x() { false || true; }", OperatorTrueFalse));
StatementMatcher OperatorIntPointer = arraySubscriptExpr(
hasLHS(hasType(isInteger())), hasRHS(hasType(pointsTo(qualType()))));
EXPECT_TRUE(matches("void x() { 1[\"abc\"]; }", OperatorIntPointer));
EXPECT_TRUE(notMatches("void x() { \"abc\"[1]; }", OperatorIntPointer));
}
TEST(MatchBinaryOperator, HasEitherOperand) {
StatementMatcher HasOperand =
binaryOperator(hasEitherOperand(cxxBoolLiteral(equals(false))));
EXPECT_TRUE(matches("void x() { true || false; }", HasOperand));
EXPECT_TRUE(matches("void x() { false && true; }", HasOperand));
EXPECT_TRUE(notMatches("void x() { true || true; }", HasOperand));
}
TEST(Matcher, BinaryOperatorTypes) {
// Integration test that verifies the AST provides all binary operators in
// a way we expect.
// FIXME: Operator ','
EXPECT_TRUE(
matches("void x() { 3, 4; }", binaryOperator(hasOperatorName(","))));
EXPECT_TRUE(
matches("bool b; bool c = (b = true);",
binaryOperator(hasOperatorName("="))));
EXPECT_TRUE(
matches("bool b = 1 != 2;", binaryOperator(hasOperatorName("!="))));
EXPECT_TRUE(
matches("bool b = 1 == 2;", binaryOperator(hasOperatorName("=="))));
EXPECT_TRUE(matches("bool b = 1 < 2;", binaryOperator(hasOperatorName("<"))));
EXPECT_TRUE(
matches("bool b = 1 <= 2;", binaryOperator(hasOperatorName("<="))));
EXPECT_TRUE(
matches("int i = 1 << 2;", binaryOperator(hasOperatorName("<<"))));
EXPECT_TRUE(
matches("int i = 1; int j = (i <<= 2);",
binaryOperator(hasOperatorName("<<="))));
EXPECT_TRUE(matches("bool b = 1 > 2;", binaryOperator(hasOperatorName(">"))));
EXPECT_TRUE(
matches("bool b = 1 >= 2;", binaryOperator(hasOperatorName(">="))));
EXPECT_TRUE(
matches("int i = 1 >> 2;", binaryOperator(hasOperatorName(">>"))));
EXPECT_TRUE(
matches("int i = 1; int j = (i >>= 2);",
binaryOperator(hasOperatorName(">>="))));
EXPECT_TRUE(
matches("int i = 42 ^ 23;", binaryOperator(hasOperatorName("^"))));
EXPECT_TRUE(
matches("int i = 42; int j = (i ^= 42);",
binaryOperator(hasOperatorName("^="))));
EXPECT_TRUE(